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驱动enc28j60芯片
官网的驱动需要多个文件，为了提取ENC28J60驱动，改写如下：
原数据类型定义：
typedef unsigned char BYTE; /* 8-bit unsigned */ typedef unsigned short int WORD; /* 16-bit unsigned */现数据类型定义(types.h)：
typedef unsigned char INT8U; /* 8-bit unsigned */ typedef unsigned short int INT16U; /* 16-bit unsigned */
bsp_ENC28J60.h
/*********************************************************************
*
* ENC28J60 registers/bits
*
*********************************************************************
* FileName: ENC28J60.h
* Dependencies: None
* Processor: PIC18, PIC24F, PIC24H, dsPIC30F, dsPIC33F, PIC32
* Compiler: Microchip C32 v1.05 or higher
* Microchip C30 v3.12 or higher
* Microchip C18 v3.30 or higher
* HI-TECH PICC-18 PRO 9.63PL2 or higher
* Company: Microchip Technology, Inc.
*
* Software License Agreement
*
* Copyright (C) 2002-2009 Microchip Technology Inc. All rights
* reserved.
*
* Microchip licenses to you the right to use, modify, copy, and
* distribute:
* (i) the Software when embedded on a Microchip microcontroller or
* digital signal controller product ("Device") which is
* integrated into Licensee's product; or
* (ii) ONLY the Software driver source files ENC28J60.c, ENC28J60.h,
* ENCX24J600.c and ENCX24J600.h ported to a non-Microchip device
* used in conjunction with a Microchip ethernet controller for
* the sole purpose of interfacing with the ethernet controller.
*
* You should refer to the license agreement accompanying this
* Software for additional information regarding your rights and
* obligations.
*
* THE SOFTWARE AND DOCUMENTATION ARE PROVIDED "AS IS" WITHOUT
* WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT
* LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* MICROCHIP BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF
* PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
* BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE
* THEREOF), ANY CLAIMS FOR INDEMNITY OR CONTRIBUTION, OR OTHER
* SIMILAR COSTS, WHETHER ASSERTED ON THE BASIS OF CONTRACT, TORT
* (INCLUDING NEGLIGENCE), BREACH OF WARRANTY, OR OTHERWISE.
*
*
* Author Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Howard Schlunder 06/01/04 Original
* Howard Schlunder 06/29/04 Fixed byte boundary problems on a
* couple of PHY register structs.
* Howard Schlunder 09/29/04 Matched with data sheet
* Howard Schlunder 01/04/06 Matched with new data sheet
* Howard Schlunder 06/29/06 Changed MACON3.PHDRLEN to PHDREN
* Howard Schlunder 07/21/06 Several bits removed to match now
* reserved bits in rev. B data sheet
* (DS39662B)
********************************************************************/
#ifndef __BSP_ENC28J60_H
#define __BSP_ENC28J60_H
#if !defined(__PACKED)
#define __PACKED
#endif
//#include "GenericTypeDefs.h"
#include <types.h>
typedef union {
INT8U v[7];
struct {
INT16U ByteCount;
unsigned char CollisionCount:4;
unsigned char CRCError:1;
unsigned char LengthCheckError:1;
unsigned char LengthOutOfRange:1;
unsigned char Done:1;
unsigned char Multicast:1;
unsigned char Broadcast:1;
unsigned char PacketDefer:1;
unsigned char ExcessiveDefer:1;
unsigned char MaximumCollisions:1;
unsigned char LateCollision:1;
unsigned char Giant:1;
unsigned char Underrun:1;
INT16U BytesTransmittedOnWire;
unsigned char ControlFrame:1;
unsigned char PAUSEControlFrame:1;
unsigned char BackpressureApplied:1;
unsigned char VLANTaggedFrame:1;
unsigned char Zeros:4;
} bits;
} TXSTATUS;
typedef union {
INT8U v[4];
struct {
INT16U ByteCount;
unsigned char PreviouslyIgnored:1;
unsigned char RXDCPreviouslySeen:1;
unsigned char CarrierPreviouslySeen:1;
unsigned char CodeViolation:1;
unsigned char CRCError:1;
unsigned char LengthCheckError:1;
unsigned char LengthOutOfRange:1;
unsigned char ReceiveOk:1;
unsigned char Multicast:1;
unsigned char Broadcast:1;
unsigned char DribbleNibble:1;
unsigned char ControlFrame:1;
unsigned char PauseControlFrame:1;
unsigned char UnsupportedOpcode:1;
unsigned char VLANType:1;
unsigned char Zero:1;
} bits;
} RXSTATUS;
/******************************************************************************
* Register locations
******************************************************************************/
// Bank 0 registers --------
#define ERDPTL 0x00
#define ERDPTH 0x01
#define EWRPTL 0x02
#define EWRPTH 0x03
#define ETXSTL 0x04
#define ETXSTH 0x05
#define ETXNDL 0x06
#define ETXNDH 0x07
#define ERXSTL 0x08
#define ERXSTH 0x09
#define ERXNDL 0x0A
#define ERXNDH 0x0B
#define ERXRDPTL 0x0C
#define ERXRDPTH 0x0D
#define ERXWRPTL 0x0E
#define ERXWRPTH 0x0F
#define EDMASTL 0x10
#define EDMASTH 0x11
#define EDMANDL 0x12
#define EDMANDH 0x13
#define EDMADSTL 0x14
#define EDMADSTH 0x15
#define EDMACSL 0x16
#define EDMACSH 0x17
//#define 0x18
//#define 0x19
//#define r 0x1A
#define EIE 0x1B
#define EIR 0x1C
#define ESTAT 0x1D
#define ECON2 0x1E
#define ECON1 0x1F
// Bank 1 registers -----
#define EHT0 0x100
#define EHT1 0x101
#define EHT2 0x102
#define EHT3 0x103
#define EHT4 0x104
#define EHT5 0x105
#define EHT6 0x106
#define EHT7 0x107
#define EPMM0 0x108
#define EPMM1 0x109
#define EPMM2 0x10A
#define EPMM3 0x10B
#define EPMM4 0x10C
#define EPMM5 0x10D
#define EPMM6 0x10E
#define EPMM7 0x10F
#define EPMCSL 0x110
#define EPMCSH 0x111
//#define 0x112
//#define 0x113
#define EPMOL 0x114
#define EPMOH 0x115
//#define r 0x116
//#define r 0x117
#define ERXFCON 0x118
#define EPKTCNT 0x119
//#define r 0x11A
//#define EIE 0x11B
//#define EIR 0x11C
//#define ESTAT 0x11D
//#define ECON2 0x11E
//#define ECON1 0x11F
// Bank 2 registers -----
#define MACON1 0x200
//#define r 0x201
#define MACON3 0x202
#define MACON4 0x203
#define MABBIPG 0x204
//#define 0x205
#define MAIPGL 0x206
#define MAIPGH 0x207
#define MACLCON1 0x208
#define MACLCON2 0x209
#define MAMXFLL 0x20A
#define MAMXFLH 0x20B
//#define r 0x20C
//#define r 0x20D
//#define r 0x20E
//#define 0x20F
//#define r 0x210
//#define r 0x211
#define MICMD 0x212
//#define r 0x213
#define MIREGADR 0x214
//#define r 0x215
#define MIWRL 0x216
#define MIWRH 0x217
#define MIRDL 0x218
#define MIRDH 0x219
//#define r 0x21A
//#define EIE 0x21B
//#define EIR 0x21C
//#define ESTAT 0x21D
//#define ECON2 0x21E
//#define ECON1 0x21F
// Bank 3 registers -----
#define MAADR5 0x300
#define MAADR6 0x301
#define MAADR3 0x302
#define MAADR4 0x303
#define MAADR1 0x304
#define MAADR2 0x305
#define EBSTSD 0x306
#define EBSTCON 0x307
#define EBSTCSL 0x308
#define EBSTCSH 0x309
#define MISTAT 0x30A
//#define 0x30B
//#define 0x30C
//#define 0x30D
//#define 0x30E
//#define 0x30F
//#define 0x310
//#define 0x311
#define EREVID 0x312
//#define 0x313
//#define 0x314
#define ECOCON 0x315
//#define 0x316
#define EFLOCON 0x317
#define EPAUSL 0x318
#define EPAUSH 0x319
//#define r 0x31A
//#define EIE 0x31B
//#define EIR 0x31C
//#define ESTAT 0x31D
//#define ECON2 0x31E
//#define ECON1 0x31F
// Structures
typedef union _REG
{
INT8U Val;
// EIE bits ----------
struct {
unsigned char RXERIE:1;
unsigned char TXERIE:1;
unsigned char :1;
unsigned char TXIE:1;
unsigned char LINKIE:1;
unsigned char DMAIE:1;
unsigned char PKTIE:1;
unsigned char INTIE:1;
} EIEbits;
// EIR bits ----------
struct {
unsigned char RXERIF:1;
unsigned char TXERIF:1;
unsigned char :1;
unsigned char TXIF:1;
unsigned char LINKIF:1;
unsigned char DMAIF:1;
unsigned char PKTIF:1;
unsigned char :1;
} EIRbits;
// ESTAT bits ---------
struct {
unsigned char CLKRDY:1;
unsigned char TXABRT:1;
unsigned char RXBUSY:1;
unsigned char :1;
unsigned char LATECOL:1;
unsigned char :1;
unsigned char BUFER:1;
unsigned char INT:1;
} ESTATbits;
// ECON2 bits --------
struct {
unsigned char :3;
unsigned char VRPS:1;
unsigned char :1;
unsigned char PWRSV:1;
unsigned char PKTDEC:1;
unsigned char AUTOINC:1;
} ECON2bits;
// ECON1 bits --------
struct {
unsigned char BSEL0:1;
unsigned char BSEL1:1;
unsigned char RXEN:1;
unsigned char TXRTS:1;
unsigned char CSUMEN:1;
unsigned char DMAST:1;
unsigned char RXRST:1;
unsigned char TXRST:1;
} ECON1bits;
// ERXFCON bits ------
struct {
unsigned char BCEN:1;
unsigned char MCEN:1;
unsigned char HTEN:1;
unsigned char MPEN:1;
unsigned char PMEN:1;
unsigned char CRCEN:1;
unsigned char ANDOR:1;
unsigned char UCEN:1;
} ERXFCONbits;
// MACON1 bits --------
struct {
unsigned char MARXEN:1;
unsigned char PASSALL:1;
unsigned char RXPAUS:1;
unsigned char TXPAUS:1;
unsigned char :4;
} MACON1bits;
// MACON3 bits --------
struct {
unsigned char FULDPX:1;
unsigned char FRMLNEN:1;
unsigned char HFRMEN:1;
unsigned char PHDREN:1;
unsigned char TXCRCEN:1;
unsigned char PADCFG0:1;
unsigned char PADCFG1:1;
unsigned char PADCFG2:1;
} MACON3bits;
struct {
unsigned char FULDPX:1;
unsigned char FRMLNEN:1;
unsigned char HFRMEN:1;
unsigned char PHDREN:1;
unsigned char TXCRCEN:1;
unsigned char PADCFG:3;
} MACON3bits2;
// MACON4 bits --------
struct {
unsigned char :4;
unsigned char NOBKOFF:1;
unsigned char BPEN:1;
unsigned char DEFER:1;
unsigned char :1;
} MACON4bits;
// MICMD bits ---------
struct {
unsigned char MIIRD:1;
unsigned char MIISCAN:1;
unsigned char :6;
} MICMDbits;
// EBSTCON bits -----
struct {
unsigned char BISTST:1;
unsigned char TME:1;
unsigned char TMSEL0:1;
unsigned char TMSEL1:1;
unsigned char PSEL:1;
unsigned char PSV0:1;
unsigned char PSV1:1;
unsigned char PSV2:1;
} EBSTCONbits;
struct {
unsigned char BISTST:1;
unsigned char TME:1;
unsigned char TMSEL:2;
unsigned char PSEL:1;
unsigned char PSV:3;
} EBSTCONbits2;
// MISTAT bits --------
struct {
unsigned char BUSY:1;
unsigned char SCAN:1;
unsigned char NVALID:1;
unsigned char :5;
} MISTATbits;
// ECOCON bits -------
struct {
unsigned char COCON0:1;
unsigned char COCON1:1;
unsigned char COCON2:1;
unsigned char :5;
} ECOCONbits;
struct {
unsigned char COCON:3;
unsigned char :5;
} ECOCONbits2;
// EFLOCON bits -----
struct {
unsigned char FCEN0:1;
unsigned char FCEN1:1;
unsigned char FULDPXS:1;
unsigned char :5;
} EFLOCONbits;
struct {
unsigned char FCEN:2;
unsigned char FULDPXS:1;
unsigned char :5;
} EFLOCONbits2;
} REG;
/******************************************************************************
* PH Register Locations
******************************************************************************/
#define PHCON1 0x00
#define PHSTAT1 0x01
#define PHID1 0x02
#define PHID2 0x03
#define PHCON2 0x10
#define PHSTAT2 0x11
#define PHIE 0x12
#define PHIR 0x13
#define PHLCON 0x14
typedef union
{
INT16U Val;
INT8U v[2] __PACKED;
struct __PACKED
{
INT8U LB;
INT8U HB;
} byte;
struct __PACKED
{
INT8U b0:1;
INT8U b1:1;
INT8U b2:1;
INT8U b3:1;
INT8U b4:1;
INT8U b5:1;
INT8U b6:1;
INT8U b7:1;
INT8U b8:1;
INT8U b9:1;
INT8U b10:1;
INT8U b11:1;
INT8U b12:1;
INT8U b13:1;
INT8U b14:1;
INT8U b15:1;
} bits;
} WORD_VAL, WORD_BITS;
typedef union {
INT16U Val;
WORD_VAL VAL;
// PHCON1 bits ----------
struct {
unsigned :8;
unsigned PDPXMD:1;
unsigned :2;
unsigned PPWRSV:1;
unsigned :2;
unsigned PLOOPBK:1;
unsigned PRST:1;
} PHCON1bits;
// PHSTAT1 bits --------
struct {
unsigned :1;
unsigned JBSTAT:1;
unsigned LLSTAT:1;
unsigned :5;
unsigned :3;
unsigned PHDPX:1;
unsigned PFDPX:1;
unsigned :3;
} PHSTAT1bits;
// PHID2 bits ----------
struct {
unsigned PREV0:1;
unsigned PREV1:1;
unsigned PREV2:1;
unsigned PREV3:1;
unsigned PPN0:1;
unsigned PPN1:1;
unsigned PPN2:1;
unsigned PPN3:1;
unsigned PPN4:1;
unsigned PPN5:1;
unsigned PID19:1;
unsigned PID20:1;
unsigned PID21:1;
unsigned PID22:1;
unsigned PID23:1;
unsigned PID24:1;
} PHID2bits;
struct {
unsigned PREV:4;
unsigned PPNL:4;
unsigned PPNH:2;
unsigned PID:6;
} PHID2bits2;
// PHCON2 bits ----------
struct {
unsigned :8;
unsigned HDLDIS:1;
unsigned :1;
unsigned JABBER:1;
unsigned :2;
unsigned TXDIS:1;
unsigned FRCLNK:1;
unsigned :1;
} PHCON2bits;
// PHSTAT2 bits --------
struct {
unsigned :5;
unsigned PLRITY:1;
unsigned :2;
unsigned :1;
unsigned DPXSTAT:1;
unsigned LSTAT:1;
unsigned COLSTAT:1;
unsigned RXSTAT:1;
unsigned TXSTAT:1;
unsigned :2;
} PHSTAT2bits;
// PHIE bits -----------
struct {
unsigned :1;
unsigned PGEIE:1;
unsigned :2;
unsigned PLNKIE:1;
unsigned :3;
unsigned :8;
} PHIEbits;
// PHIR bits -----------
struct {
unsigned :2;
unsigned PGIF:1;
unsigned :1;
unsigned PLNKIF:1;
unsigned :3;
unsigned :8;
} PHIRbits;
// PHLCON bits -------
struct {
unsigned :1;
unsigned STRCH:1;
unsigned LFRQ0:1;
unsigned LFRQ1:1;
unsigned LBCFG0:1;
unsigned LBCFG1:1;
unsigned LBCFG2:1;
unsigned LBCFG3:1;
unsigned LACFG0:1;
unsigned LACFG1:1;
unsigned LACFG2:1;
unsigned LACFG3:1;
unsigned :4;
} PHLCONbits;
struct {
unsigned :1;
unsigned STRCH:1;
unsigned LFRQ:2;
unsigned LBCFG:4;
unsigned LACFG:4;
unsigned :4;
} PHLCONbits2;
} PHYREG;
/******************************************************************************
* Individual Register Bits
******************************************************************************/
// ETH/MAC/MII bits
// EIE bits ----------
#define EIE_INTIE (1<<7)
#define EIE_PKTIE (1<<6)
#define EIE_DMAIE (1<<5)
#define EIE_LINKIE (1<<4)
#define EIE_TXIE (1<<3)
#define EIE_TXERIE (1<<1)
#define EIE_RXERIE (1)
// EIR bits ----------
#define EIR_PKTIF (1<<6)
#define EIR_DMAIF (1<<5)
#define EIR_LINKIF (1<<4)
#define EIR_TXIF (1<<3)
#define EIR_TXERIF (1<<1)
#define EIR_RXERIF (1)
// ESTAT bits ---------
#define ESTAT_INT (1<<7)
#define ESTAT_BUFER (1<<6)
#define ESTAT_LATECOL (1<<4)
#define ESTAT_RXBUSY (1<<2)
#define ESTAT_TXABRT (1<<1)
#define ESTAT_CLKRDY (1)
// ECON2 bits --------
#define ECON2_AUTOINC (1<<7)
#define ECON2_PKTDEC (1<<6)
#define ECON2_PWRSV (1<<5)
#define ECON2_VRPS (1<<3)
// ECON1 bits --------
#define ECON1_TXRST (1<<7)
#define ECON1_RXRST (1<<6)
#define ECON1_DMAST (1<<5)
#define ECON1_CSUMEN (1<<4)
#define ECON1_TXRTS (1<<3)
#define ECON1_RXEN (1<<2)
#define ECON1_BSEL1 (1<<1)
#define ECON1_BSEL0 (1)
// ERXFCON bits ------
#define ERXFCON_UCEN (1<<7)
#define ERXFCON_ANDOR (1<<6)
#define ERXFCON_CRCEN (1<<5)
#define ERXFCON_PMEN (1<<4)
#define ERXFCON_MPEN (1<<3)
#define ERXFCON_HTEN (1<<2)
#define ERXFCON_MCEN (1<<1)
#define ERXFCON_BCEN (1)
// MACON1 bits --------
#define MACON1_TXPAUS (1<<3)
#define MACON1_RXPAUS (1<<2)
#define MACON1_PASSALL (1<<1)
#define MACON1_MARXEN (1)
// MACON3 bits --------
#define MACON3_PADCFG2 (1<<7)
#define MACON3_PADCFG1 (1<<6)
#define MACON3_PADCFG0 (1<<5)
#define MACON3_TXCRCEN (1<<4)
#define MACON3_PHDREN (1<<3)
#define MACON3_HFRMEN (1<<2)
#define MACON3_FRMLNEN (1<<1)
#define MACON3_FULDPX (1)
// MACON4 bits --------
#define MACON4_DEFER (1<<6)
#define MACON4_BPEN (1<<5)
#define MACON4_NOBKOFF (1<<4)
// MICMD bits ---------
#define MICMD_MIISCAN (1<<1)
#define MICMD_MIIRD (1)
// EBSTCON bits -----
#define EBSTCON_PSV2 (1<<7)
#define EBSTCON_PSV1 (1<<6)
#define EBSTCON_PSV0 (1<<5)
#define EBSTCON_PSEL (1<<4)
#define EBSTCON_TMSEL1 (1<<3)
#define EBSTCON_TMSEL0 (1<<2)
#define EBSTCON_TME (1<<1)
#define EBSTCON_BISTST (1)
// MISTAT bits --------
#define MISTAT_NVALID (1<<2)
#define MISTAT_SCAN (1<<1)
#define MISTAT_BUSY (1)
// ECOCON bits -------
#define ECOCON_COCON2 (1<<2)
#define ECOCON_COCON1 (1<<1)
#define ECOCON_COCON0 (1)
// EFLOCON bits -----
#define EFLOCON_FULDPXS (1<<2)
#define EFLOCON_FCEN1 (1<<1)
#define EFLOCON_FCEN0 (1)
// PHY bits
// PHCON1 bits ----------
#define PHCON1_PRST (1ul<<15)
#define PHCON1_PLOOPBK (1ul<<14)
#define PHCON1_PPWRSV (1ul<<11)
#define PHCON1_PDPXMD (1ul<<8)
// PHSTAT1 bits --------
#define PHSTAT1_PFDPX (1ul<<12)
#define PHSTAT1_PHDPX (1ul<<11)
#define PHSTAT1_LLSTAT (1ul<<2)
#define PHSTAT1_JBSTAT (1ul<<1)
// PHID2 bits --------
#define PHID2_PID24 (1ul<<15)
#define PHID2_PID23 (1ul<<14)
#define PHID2_PID22 (1ul<<13)
#define PHID2_PID21 (1ul<<12)
#define PHID2_PID20 (1ul<<11)
#define PHID2_PID19 (1ul<<10)
#define PHID2_PPN5 (1ul<<9)
#define PHID2_PPN4 (1ul<<8)
#define PHID2_PPN3 (1ul<<7)
#define PHID2_PPN2 (1ul<<6)
#define PHID2_PPN1 (1ul<<5)
#define PHID2_PPN0 (1ul<<4)
#define PHID2_PREV3 (1ul<<3)
#define PHID2_PREV2 (1ul<<2)
#define PHID2_PREV1 (1ul<<1)
#define PHID2_PREV0 (1ul)
// PHCON2 bits ----------
#define PHCON2_FRCLNK (1ul<<14)
#define PHCON2_TXDIS (1ul<<13)
#define PHCON2_JABBER (1ul<<10)
#define PHCON2_HDLDIS (1ul<<8)
// PHSTAT2 bits --------
#define PHSTAT2_TXSTAT (1ul<<13)
#define PHSTAT2_RXSTAT (1ul<<12)
#define PHSTAT2_COLSTAT (1ul<<11)
#define PHSTAT2_LSTAT (1ul<<10)
#define PHSTAT2_DPXSTAT (1ul<<9)
#define PHSTAT2_PLRITY (1ul<<5)
// PHIE bits -----------
#define PHIE_PLNKIE (1ul<<4)
#define PHIE_PGEIE (1ul<<1)
// PHIR bits -----------
#define PHIR_PLNKIF (1ul<<4)
#define PHIR_PGIF (1ul<<2)
// PHLCON bits -------
#define PHLCON_LACFG3 (1ul<<11)
#define PHLCON_LACFG2 (1ul<<10)
#define PHLCON_LACFG1 (1ul<<9)
#define PHLCON_LACFG0 (1ul<<8)
#define PHLCON_LBCFG3 (1ul<<7)
#define PHLCON_LBCFG2 (1ul<<6)
#define PHLCON_LBCFG1 (1ul<<5)
#define PHLCON_LBCFG0 (1ul<<4)
#define PHLCON_LFRQ1 (1ul<<3)
#define PHLCON_LFRQ0 (1ul<<2)
#define PHLCON_STRCH (1ul<<1)
#endif
bsp_ENC28J60.h
/*********************************************************************
*
* Medium Access Control (MAC) Layer for Microchip ENC28J60
* Module for Microchip TCP/IP Stack
* -Provides access to ENC28J60 Ethernet controller
* -Reference: ENC28J60 Data sheet, IEEE 802.3 Standard
*
*********************************************************************
* FileName: ENC28J60.c
* Dependencies: ENC28J60.h
* MAC.h
* string.h
* StackTsk.h
* Helpers.h
* Delay.h
* Processor: PIC18, PIC24F, PIC24H, dsPIC30F, dsPIC33F, PIC32
* Compiler: Microchip C32 v1.05 or higher
* Microchip C30 v3.12 or higher
* Microchip C18 v3.30 or higher
* HI-TECH PICC-18 PRO 9.63PL2 or higher
* Company: Microchip Technology, Inc.
*
* Software License Agreement
*
* Copyright (C) 2002-2009 Microchip Technology Inc. All rights
* reserved.
*
* Microchip licenses to you the right to use, modify, copy, and
* distribute:
* (i) the Software when embedded on a Microchip microcontroller or
* digital signal controller product ("Device") which is
* integrated into Licensee's product; or
* (ii) ONLY the Software driver source files ENC28J60.c, ENC28J60.h,
* ENCX24J600.c and ENCX24J600.h ported to a non-Microchip device
* used in conjunction with a Microchip ethernet controller for
* the sole purpose of interfacing with the ethernet controller.
*
* You should refer to the license agreement accompanying this
* Software for additional information regarding your rights and
* obligations.
*
* THE SOFTWARE AND DOCUMENTATION ARE PROVIDED "AS IS" WITHOUT
* WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT
* LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* MICROCHIP BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF
* PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
* BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE
* THEREOF), ANY CLAIMS FOR INDEMNITY OR CONTRIBUTION, OR OTHER
* SIMILAR COSTS, WHETHER ASSERTED ON THE BASIS OF CONTRACT, TORT
* (INCLUDING NEGLIGENCE), BREACH OF WARRANTY, OR OTHERWISE.
*
*
* Author Date Comment
*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* Howard Schlunder 6/28/04 Original
* Howard Schlunder 10/8/04 Cleanup
* Howard Schlunder 10/19/04 Small optimizations and more cleanup
* Howard Schlunder 11/29/04 Added Set/GetCLKOUT
* Howard Schlunder 12/23/05 Added B1 silicon errata workarounds
* Howard Schlunder 1/09/06 Added comments and minor mods
* Howard Schlunder 1/18/06 Added more silicon errata workarounds
* Howard Schlunder 6/16/06 Synchronized with PIC18F97J60 code
* Howard Schlunder 7/17/06 Updated TestMemory() for C30
* Howard Schlunder 8/07/06 Added SetRXHashTableEntry() function
********************************************************************/
#define __BSP_ENC28J60_C
//#include "HardwareProfile.h"
#include "bsp_ENC28J60.h"
// Make sure that this hardware profile has an ENC28J60 in it
#if defined(ENC_CS_TRIS)
//#include "TCPIP Stack/TCPIP.h"
/** D E F I N I T I O N S ****************************************************/
// IMPORTANT SPI NOTE: The code in this file expects that the SPI interrupt
// flag (ENC_SPI_IF) be clear at all times. If the SPI is shared with
// other hardware, the other code should clear the ENC_SPI_IF when it is
// done using the SPI.
// Since the ENC28J60 doesn't support auto-negotiation, full-duplex mode is
// not compatible with most switches/routers. If a dedicated network is used
// where the duplex of the remote node can be manually configured, you may
// change this configuration. Otherwise, half duplex should always be used.
#define HALF_DUPLEX
//#define FULL_DUPLEX
//#define LEDB_DUPLEX
// Pseudo Functions
#define LOW(a) ((a) & 0xFF)
#define HIGH(a) (((a)>>8) & 0xFF)
// ENC28J60 Opcodes (to be ORed with a 5 bit address)
#define WCR (0x2<<5) // Write Control Register command
#define BFS (0x4<<5) // Bit Field Set command
#define BFC (0x5<<5) // Bit Field Clear command
#define RCR (0x0<<5) // Read Control Register command
#define RBM ((0x1<<5) | 0x1A) // Read Buffer Memory command
#define WBM ((0x3<<5) | 0x1A) // Write Buffer Memory command
#define SR ((0x7<<5) | 0x1F) // System Reset command does not use an address.
// It requires 0x1F, however.
// Maximum SPI frequency specified in data sheet
#define ENC_MAX_SPI_FREQ (20000000ul) // Hz
#define ETHER_IP (0x00u)
#define ETHER_ARP (0x06u)
// A header appended at the start of all RX frames by the hardware
typedef struct __attribute__((aligned(2), packed))
{
INT16U NextPacketPointer;
RXSTATUS StatusVector;
MAC_ADDR DestMACAddr;
MAC_ADDR SourceMACAddr;
WORD_VAL Type;
} ENC_PREAMBLE;
#if defined (__18CXX)
#define ClearSPIDoneFlag() {ENC_SPI_IF = 0;}
#define WaitForDataByte() {while(!ENC_SPI_IF); ENC_SPI_IF = 0;}
#define SPI_ON_BIT (ENC_SPICON1bits.SSPEN)
#elif defined(__C30__)
#define ClearSPIDoneFlag()
static inline __attribute__((__always_inline__)) void WaitForDataByte( void )
{
while ((ENC_SPISTATbits.SPITBF == 1) || (ENC_SPISTATbits.SPIRBF == 0));
}
#define SPI_ON_BIT (ENC_SPISTATbits.SPIEN)
#elif defined( __PIC32MX__ )
#define ClearSPIDoneFlag()
static inline __attribute__((__always_inline__)) void WaitForDataByte( void )
{
while (!ENC_SPISTATbits.SPITBE || !ENC_SPISTATbits.SPIRBF);
}
#define SPI_ON_BIT (ENC_SPICON1bits.ON)
#else
#error Determine SPI flag mechanism
#endif
// Prototypes of functions intended for MAC layer use only.
static void BankSel(INT16U Register);
static REG ReadETHReg(INT8U Address);
static REG ReadMACReg(INT8U Address);
static void WriteReg(INT8U Address, INT8U Data);
static void BFCReg(INT8U Address, INT8U Data);
static void BFSReg(INT8U Address, INT8U Data);
static void SendSystemReset(void);
//static void GetRegs(void);
//void Get8KBRAM(void);
// Internal MAC level variables and flags.
static WORD_VAL NextPacketLocation;
static WORD_VAL CurrentPacketLocation;
static BOOL WasDiscarded;
static INT8U ENCRevID;
//NOTE: All code in this module expects Bank 0 to be currently selected. If code ever changes the bank, it must restore it to Bank 0 before returning.
/******************************************************************************
* Function: void MACInit(void)
*
* PreCondition: None
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: MACInit sets up the PIC's SPI module and all the
* registers in the ENC28J60 so that normal operation can
* begin.
*
* Note: None
*****************************************************************************/
void MACInit(void)
{
INT8U i;
// Set up the SPI module on the PIC for communications with the ENC28J60
ENC_CS_IO = 1;
ENC_CS_TRIS = 0; // Make the Chip Select pin an output
#if defined(__18CXX)
ENC_SCK_TRIS = 0;
ENC_SDO_TRIS = 0;
ENC_SDI_TRIS = 1;
#endif
// If the RESET pin is connected, take the chip out of reset
#if defined(ENC_RST_IO)
ENC_RST_IO = 1;
ENC_RST_TRIS = 0;
#endif
// Set up SPI
ClearSPIDoneFlag();
#if defined(__18CXX)
ENC_SPICON1 = 0x20; // SSPEN bit is set, SPI in master mode, FOSC/4,
// IDLE state is low level
ENC_SPISTATbits.CKE = 1;// Transmit data on rising edge of clock
ENC_SPISTATbits.SMP = 0;// Input sampled at middle of data output time
#elif defined(__C30__)
ENC_SPISTAT = 0; // clear SPI
#if defined(__PIC24H__) || defined(__dsPIC33F__)
ENC_SPICON1 = 0x0F; // 1:1 primary prescale, 5:1 secondary prescale (8MHz @ 40MIPS)
// ENC_SPICON1 = 0x1E; // 4:1 primary prescale, 1:1 secondary prescale (10MHz @ 40MIPS, Doesn't work. CLKRDY is incorrectly reported as being clear. Problem caused by dsPIC33/PIC24H ES silicon bug.)
#elif defined(__PIC24F__)
// ENC_SPICON1 = 0x1F; // 1:1 prescale broken on PIC24F ES silicon (16MHz @ 16MIPS)
ENC_SPICON1 = 0x1B; // 1:1 primary prescale, 2:1 secondary prescale (8MHz @ 16MIPS)
#else // dsPIC30F
ENC_SPICON1 = 0x17; // 1:1 primary prescale, 3:1 secondary prescale (10MHz @ 30MIPS)
#endif
ENC_SPICON2 = 0;
ENC_SPICON1bits.CKE = 1;
ENC_SPICON1bits.MSTEN = 1;
ENC_SPISTATbits.SPIEN = 1;
#elif defined(__C32__)
ENC_SPIBRG = (GetPeripheralClock()-1ul)/2ul/ENC_MAX_SPI_FREQ;
ENC_SPICON1bits.SMP = 1; // Delay SDI input sampling (PIC perspective) by 1/2 SPI clock
ENC_SPICON1bits.CKE = 1;
ENC_SPICON1bits.MSTEN = 1;
ENC_SPICON1bits.ON = 1;
#endif
// RESET the entire ENC28J60, clearing all registers
// Also wait for CLKRDY to become set.
// Bit 3 in ESTAT is an unimplemented bit. If it reads out as '1' that
// means the part is in RESET or there is something wrong with the SPI
// connection. This loop makes sure that we can communicate with the
// ENC28J60 before proceeding.
do
{
SendSystemReset();
i = ReadETHReg(ESTAT).Val;
} while((i & 0x08) || (~i & ESTAT_CLKRDY));
// Start up in Bank 0 and configure the receive buffer boundary pointers
// and the buffer write protect pointer (receive buffer read pointer)
WasDiscarded = TRUE;
NextPacketLocation.Val = RXSTART;
WriteReg(ERXSTL, LOW(RXSTART));
WriteReg(ERXSTH, HIGH(RXSTART));
WriteReg(ERXRDPTL, LOW(RXSTOP)); // Write low byte first
WriteReg(ERXRDPTH, HIGH(RXSTOP)); // Write high byte last
WriteReg(ERXNDL, LOW(RXSTOP));
WriteReg(ERXNDH, HIGH(RXSTOP));
WriteReg(ETXSTL, LOW(TXSTART));
WriteReg(ETXSTH, HIGH(TXSTART));
// Write a permanant per packet control byte of 0x00
WriteReg(EWRPTL, LOW(TXSTART));
WriteReg(EWRPTH, HIGH(TXSTART));
MACPut(0x00);
// Enter Bank 1 and configure Receive Filters
// (No need to reconfigure - Unicast OR Broadcast with CRC checking is
// acceptable)
// Write ERXFCON_CRCEN only to ERXFCON to enter promiscuous mode
// Promiscious mode example:
//BankSel(ERXFCON);
//WriteReg((INT8U)ERXFCON, ERXFCON_CRCEN);
// Enter Bank 2 and configure the MAC
BankSel(MACON1);
// Enable the receive portion of the MAC
WriteReg((INT8U)MACON1, MACON1_TXPAUS | MACON1_RXPAUS | MACON1_MARXEN);
// Pad packets to 60 bytes, add CRC, and check Type/Length field.
#if defined(FULL_DUPLEX)
WriteReg((INT8U)MACON3, MACON3_PADCFG0 | MACON3_TXCRCEN | MACON3_FRMLNEN | MACON3_FULDPX);
WriteReg((INT8U)MABBIPG, 0x15);
#else
WriteReg((INT8U)MACON3, MACON3_PADCFG0 | MACON3_TXCRCEN | MACON3_FRMLNEN);
WriteReg((INT8U)MABBIPG, 0x12);
#endif
// Allow infinite deferals if the medium is continuously busy
// (do not time out a transmission if the half duplex medium is
// completely saturated with other people's data)
WriteReg((INT8U)MACON4, MACON4_DEFER);
// Late collisions occur beyond 63+8 bytes (8 bytes for preamble/start of frame delimiter)
// 55 is all that is needed for IEEE 802.3, but ENC28J60 B5 errata for improper link pulse
// collisions will occur less often with a larger number.
WriteReg((INT8U)MACLCON2, 63);
// Set non-back-to-back inter-packet gap to 9.6us. The back-to-back
// inter-packet gap (MABBIPG) is set by MACSetDuplex() which is called
// later.
WriteReg((INT8U)MAIPGL, 0x12);
WriteReg((INT8U)MAIPGH, 0x0C);
// Set the maximum packet size which the controller will accept
WriteReg((INT8U)MAMXFLL, LOW(6+6+2+1500+4)); // 1518 is the IEEE 802.3 specified limit
WriteReg((INT8U)MAMXFLH, HIGH(6+6+2+1500+4)); // 1518 is the IEEE 802.3 specified limit
// Enter Bank 3 and initialize physical MAC address registers
BankSel(MAADR1);
WriteReg((INT8U)MAADR1, AppConfig.MyMACAddr.v[0]);
WriteReg((INT8U)MAADR2, AppConfig.MyMACAddr.v[1]);
WriteReg((INT8U)MAADR3, AppConfig.MyMACAddr.v[2]);
WriteReg((INT8U)MAADR4, AppConfig.MyMACAddr.v[3]);
WriteReg((INT8U)MAADR5, AppConfig.MyMACAddr.v[4]);
WriteReg((INT8U)MAADR6, AppConfig.MyMACAddr.v[5]);
// Disable the CLKOUT output to reduce EMI generation
WriteReg((INT8U)ECOCON, 0x00); // Output off (0V)
//WriteReg((INT8U)ECOCON, 0x01); // 25.000MHz
//WriteReg((INT8U)ECOCON, 0x03); // 8.3333MHz (*4 with PLL is 33.3333MHz)
// Get the Rev ID so that we can implement the correct errata workarounds
ENCRevID = ReadETHReg((INT8U)EREVID).Val;
// Disable half duplex loopback in PHY. Bank bits changed to Bank 2 as a
// side effect.
WritePHYReg(PHCON2, PHCON2_HDLDIS);
// Configure LEDA to display LINK status, LEDB to display TX/RX activity
SetLEDConfig(0x3472);
// Set the MAC and PHY into the proper duplex state
#if defined(FULL_DUPLEX)
WritePHYReg(PHCON1, PHCON1_PDPXMD);
#elif defined(HALF_DUPLEX)
WritePHYReg(PHCON1, 0x0000);
#else
// Use the external LEDB polarity to determine weather full or half duplex
// communication mode should be set.
{
REG Register;
PHYREG PhyReg;
// Read the PHY duplex mode
PhyReg = ReadPHYReg(PHCON1);
DuplexState = PhyReg.PHCON1bits.PDPXMD;
// Set the MAC to the proper duplex mode
BankSel(MACON3);
Register = ReadMACReg((INT8U)MACON3);
Register.MACON3bits.FULDPX = PhyReg.PHCON1bits.PDPXMD;
WriteReg((INT8U)MACON3, Register.Val);
// Set the back-to-back inter-packet gap time to IEEE specified
// requirements. The meaning of the MABBIPG value changes with the duplex
// state, so it must be updated in this function.
// In full duplex, 0x15 represents 9.6us; 0x12 is 9.6us in half duplex
WriteReg((INT8U)MABBIPG, PhyReg.PHCON1bits.PDPXMD ? 0x15 : 0x12);
}
#endif
BankSel(ERDPTL); // Return to default Bank 0
// Enable packet reception
BFSReg(ECON1, ECON1_RXEN);
}//end MACInit
/******************************************************************************
* Function: BOOL MACIsLinked(void)
*
* PreCondition: None
*
* Input: None
*
* Output: TRUE: If the PHY reports that a link partner is present
* and the link has been up continuously since the last
* call to MACIsLinked()
* FALSE: If the PHY reports no link partner, or the link went
* down momentarily since the last call to MACIsLinked()
*
* Side Effects: None
*
* Overview: Returns the PHSTAT1.LLSTAT bit.
*
* Note: None
*****************************************************************************/
BOOL MACIsLinked(void)
{
// LLSTAT is a latching low link status bit. Therefore, if the link
// goes down and comes back up before a higher level stack program calls
// MACIsLinked(), MACIsLinked() will still return FALSE. The next
// call to MACIsLinked() will return TRUE (unless the link goes down
// again).
return ReadPHYReg(PHSTAT1).PHSTAT1bits.LLSTAT;
}
/******************************************************************************
* Function: BOOL MACIsTxReady(void)
*
* PreCondition: None
*
* Input: None
*
* Output: TRUE: If no Ethernet transmission is in progress
* FALSE: If a previous transmission was started, and it has
* not completed yet. While FALSE, the data in the
* transmit buffer and the TXST/TXND pointers must not
* be changed.
*
* Side Effects: None
*
* Overview: Returns the ECON1.TXRTS bit
*
* Note: None
*****************************************************************************/
BOOL MACIsTxReady(void)
{
return !ReadETHReg(ECON1).ECON1bits.TXRTS;
}
/******************************************************************************
* Function: void MACDiscardRx(void)
*
* PreCondition: None
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: Marks the last received packet (obtained using
* MACGetHeader())as being processed and frees the buffer
* memory associated with it
*
* Note: Is is safe to call this function multiple times between
* MACGetHeader() calls. Extra packets won't be thrown away
* until MACGetHeader() makes it available.
*****************************************************************************/
void MACDiscardRx(void)
{
WORD_VAL NewRXRDLocation;
// Make sure the current packet was not already discarded
if(WasDiscarded)
return;
WasDiscarded = TRUE;
// Decrement the next packet pointer before writing it into
// the ERXRDPT registers. This is a silicon errata workaround.
// RX buffer wrapping must be taken into account if the
// NextPacketLocation is precisely RXSTART.
NewRXRDLocation.Val = NextPacketLocation.Val - 1;
if(NewRXRDLocation.Val > RXSTOP)
{
NewRXRDLocation.Val = RXSTOP;
}
// Decrement the RX packet counter register, EPKTCNT
BFSReg(ECON2, ECON2_PKTDEC);
// Move the receive read pointer to unwrite-protect the memory used by the
// last packet. The writing order is important: set the low byte first,
// high byte last.
WriteReg(ERXRDPTL, NewRXRDLocation.v[0]);
WriteReg(ERXRDPTH, NewRXRDLocation.v[1]);
}
/******************************************************************************
* Function: INT16U MACGetFreeRxSize(void)
*
* PreCondition: None
*
* Input: None
*
* Output: A INT16U estimate of how much RX buffer space is free at
* the present time.
*
* Side Effects: None
*
* Overview: None
*
* Note: None
*****************************************************************************/
INT16U MACGetFreeRxSize(void)
{
WORD_VAL ReadPT, WritePT;
// Read the Ethernet hardware buffer write pointer. Because packets can be
// received at any time, it can change between reading the low and high
// bytes. A loop is necessary to make certain a proper low/high byte pair
// is read.
BankSel(EPKTCNT);
do {
// Save EPKTCNT in a temporary location
ReadPT.v[0] = ReadETHReg((INT8U)EPKTCNT).Val;
BankSel(ERXWRPTL);
WritePT.v[0] = ReadETHReg(ERXWRPTL).Val;
WritePT.v[1] = ReadETHReg(ERXWRPTH).Val;
BankSel(EPKTCNT);
} while(ReadETHReg((INT8U)EPKTCNT).Val != ReadPT.v[0]);
// Determine where the write protection pointer is
BankSel(ERXRDPTL);
ReadPT.v[0] = ReadETHReg(ERXRDPTL).Val;
ReadPT.v[1] = ReadETHReg(ERXRDPTH).Val;
// Calculate the difference between the pointers, taking care to account
// for buffer wrapping conditions
if(WritePT.Val > ReadPT.Val)
{
return (RXSTOP - RXSTART) - (WritePT.Val - ReadPT.Val);
}
else if(WritePT.Val == ReadPT.Val)
{
return RXSIZE - 1;
}
else
{
return ReadPT.Val - WritePT.Val - 1;
}
}
/******************************************************************************
* Function: BOOL MACGetHeader(MAC_ADDR *remote, INT8U* type)
*
* PreCondition: None
*
* Input: *remote: Location to store the Source MAC address of the
* received frame.
* *type: Location of a INT8U to store the constant
* MAC_UNKNOWN, ETHER_IP, or ETHER_ARP, representing
* the contents of the Ethernet type field.
*
* Output: TRUE: If a packet was waiting in the RX buffer. The
* remote, and type values are updated.
* FALSE: If a packet was not pending. remote and type are
* not changed.
*
* Side Effects: Last packet is discarded if MACDiscardRx() hasn't already
* been called.
*
* Overview: None
*
* Note: None
*****************************************************************************/
BOOL MACGetHeader(MAC_ADDR *remote, INT8U* type)
{
ENC_PREAMBLE header;
INT8U PacketCount;
// Test if at least one packet has been received and is waiting
BankSel(EPKTCNT);
PacketCount = ReadETHReg((INT8U)EPKTCNT).Val;
BankSel(ERDPTL);
if(PacketCount == 0u)
return FALSE;
// Make absolutely certain that any previous packet was discarded
if(WasDiscarded == FALSE)
{
MACDiscardRx();
return FALSE;
}
// Set the SPI read pointer to the beginning of the next unprocessed packet
CurrentPacketLocation.Val = NextPacketLocation.Val;
WriteReg(ERDPTL, CurrentPacketLocation.v[0]);
WriteReg(ERDPTH, CurrentPacketLocation.v[1]);
// Obtain the MAC header from the Ethernet buffer
MACGetArray((INT8U*)&header, sizeof(header));
// The EtherType field, like most items transmitted on the Ethernet medium
// are in big endian.
header.Type.Val = swaps(header.Type.Val);
// Validate the data returned from the ENC28J60. Random data corruption,
// such as if a single SPI bit error occurs while communicating or a
// momentary power glitch could cause this to occur in rare circumstances.
if(header.NextPacketPointer > RXSTOP || ((BYTE_VAL*)(&header.NextPacketPointer))->bits.b0 ||
header.StatusVector.bits.Zero ||
header.StatusVector.bits.CRCError ||
header.StatusVector.bits.ByteCount > 1518u ||
!header.StatusVector.bits.ReceiveOk)
{
Reset();
}
// Save the location where the hardware will write the next packet to
NextPacketLocation.Val = header.NextPacketPointer;
// Return the Ethernet frame's Source MAC address field to the caller
// This parameter is useful for replying to requests without requiring an
// ARP cycle.
memcpy((void*)remote->v, (void*)header.SourceMACAddr.v, sizeof(*remote));
// Return a simplified version of the EtherType field to the caller
*type = MAC_UNKNOWN;
if( (header.Type.v[1] == 0x08u) &&
((header.Type.v[0] == ETHER_IP) || (header.Type.v[0] == ETHER_ARP)) )
{
*type = header.Type.v[0];
}
// Mark this packet as discardable
WasDiscarded = FALSE;
return TRUE;
}
/******************************************************************************
* Function: void MACPutHeader(MAC_ADDR *remote, INT8U type, INT16U dataLen)
*
* PreCondition: MACIsTxReady() must return TRUE.
*
* Input: *remote: Pointer to memory which contains the destination
* MAC address (6 bytes)
* type: The constant ETHER_ARP or ETHER_IP, defining which
* value to write into the Ethernet header's type field.
* dataLen: Length of the Ethernet data payload
*
* Output: None
*
* Side Effects: None
*
* Overview: None
*
* Note: Because of the dataLen parameter, it is probably
* advantagous to call this function immediately before
* transmitting a packet rather than initially when the
* packet is first created. The order in which the packet
* is constructed (header first or data first) is not
* important.
*****************************************************************************/
void MACPutHeader(MAC_ADDR *remote, INT8U type, INT16U dataLen)
{
// Set the SPI write pointer to the beginning of the transmit buffer (post per packet control byte)
WriteReg(EWRPTL, LOW(TXSTART+1));
WriteReg(EWRPTH, HIGH(TXSTART+1));
// Calculate where to put the TXND pointer
dataLen += (INT16U)sizeof(ETHER_HEADER) + TXSTART;
// Write the TXND pointer into the registers, given the dataLen given
WriteReg(ETXNDL, ((WORD_VAL*)&dataLen)->v[0]);
WriteReg(ETXNDH, ((WORD_VAL*)&dataLen)->v[1]);
// Set the per-packet control byte and write the Ethernet destination
// address
MACPutArray((INT8U*)remote, sizeof(*remote));
// Write our MAC address in the Ethernet source field
MACPutArray((INT8U*)&AppConfig.MyMACAddr, sizeof(AppConfig.MyMACAddr));
// Write the appropriate Ethernet Type INT16U for the protocol being used
MACPut(0x08);
MACPut((type == MAC_IP) ? ETHER_IP : ETHER_ARP);
}
/******************************************************************************
* Function: void MACFlush(void)
*
* PreCondition: A packet has been created by calling MACPut() and
* MACPutHeader().
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: MACFlush causes the current TX packet to be sent out on
* the Ethernet medium. The hardware MAC will take control
* and handle CRC generation, collision retransmission and
* other details.
*
* Note: After transmission completes (MACIsTxReady() returns TRUE),
* the packet can be modified and transmitted again by calling
* MACFlush() again. Until MACPutHeader() or MACPut() is
* called (in the TX data area), the data in the TX buffer
* will not be corrupted.
*****************************************************************************/
void MACFlush(void)
{
// Reset transmit logic if a TX Error has previously occured
// This is a silicon errata workaround
BFSReg(ECON1, ECON1_TXRST);
BFCReg(ECON1, ECON1_TXRST);
BFCReg(EIR, EIR_TXERIF | EIR_TXIF);
// Start the transmission
// After transmission completes (MACIsTxReady() returns TRUE), the packet
// can be modified and transmitted again by calling MACFlush() again.
// Until MACPutHeader() is called, the data in the TX buffer will not be
// corrupted.
BFSReg(ECON1, ECON1_TXRTS);
// Revision B5 and B7 silicon errata workaround
if(ENCRevID == 0x05u || ENCRevID == 0x06u)
{
INT16U AttemptCounter = 0x0000;
while(!(ReadETHReg(EIR).Val & (EIR_TXERIF | EIR_TXIF)) && (++AttemptCounter < 1000u));
if(ReadETHReg(EIR).EIRbits.TXERIF || (AttemptCounter >= 1000u))
{
WORD_VAL ReadPtrSave;
WORD_VAL TXEnd;
TXSTATUS TXStatus;
INT8U i;
// Cancel the previous transmission if it has become stuck set
BFCReg(ECON1, ECON1_TXRTS);
// Save the current read pointer (controlled by application)
ReadPtrSave.v[0] = ReadETHReg(ERDPTL).Val;
ReadPtrSave.v[1] = ReadETHReg(ERDPTH).Val;
// Get the location of the transmit status vector
TXEnd.v[0] = ReadETHReg(ETXNDL).Val;
TXEnd.v[1] = ReadETHReg(ETXNDH).Val;
TXEnd.Val++;
// Read the transmit status vector
WriteReg(ERDPTL, TXEnd.v[0]);
WriteReg(ERDPTH, TXEnd.v[1]);
MACGetArray((INT8U*)&TXStatus, sizeof(TXStatus));
// Implement retransmission if a late collision occured (this can
// happen on B5 when certain link pulses arrive at the same time
// as the transmission)
for(i = 0; i < 16u; i++)
{
if(ReadETHReg(EIR).EIRbits.TXERIF && TXStatus.bits.LateCollision)
{
// Reset the TX logic
BFSReg(ECON1, ECON1_TXRST);
BFCReg(ECON1, ECON1_TXRST);
BFCReg(EIR, EIR_TXERIF | EIR_TXIF);
// Transmit the packet again
BFSReg(ECON1, ECON1_TXRTS);
while(!(ReadETHReg(EIR).Val & (EIR_TXERIF | EIR_TXIF)));
// Cancel the previous transmission if it has become stuck set
BFCReg(ECON1, ECON1_TXRTS);
// Read transmit status vector
WriteReg(ERDPTL, TXEnd.v[0]);
WriteReg(ERDPTH, TXEnd.v[1]);
MACGetArray((INT8U*)&TXStatus, sizeof(TXStatus));
}
else
{
break;
}
}
// Restore the current read pointer
WriteReg(ERDPTL, ReadPtrSave.v[0]);
WriteReg(ERDPTH, ReadPtrSave.v[1]);
}
}
}
/******************************************************************************
* Function: void MACSetReadPtrInRx(INT16U offset)
*
* PreCondition: A packet has been obtained by calling MACGetHeader() and
* getting a TRUE result.
*
* Input: offset: INT16U specifying how many bytes beyond the Ethernet
* header's type field to relocate the SPI read
* pointer.
*
* Output: None
*
* Side Effects: None
*
* Overview: SPI read pointer are updated. All calls to
* MACGet() and MACGetArray() will use these new values.
*
* Note: RXSTOP must be statically defined as being > RXSTART for
* this function to work correctly. In other words, do not
* define an RX buffer which spans the 0x1FFF->0x0000 memory
* boundary.
*****************************************************************************/
void MACSetReadPtrInRx(INT16U offset)
{
WORD_VAL ReadPT;
// Determine the address of the beginning of the entire packet
// and adjust the address to the desired location
ReadPT.Val = CurrentPacketLocation.Val + sizeof(ENC_PREAMBLE) + offset;
// Since the receive buffer is circular, adjust if a wraparound is needed
if(ReadPT.Val > RXSTOP)
ReadPT.Val -= RXSIZE;
// Set the SPI read pointer to the new calculated value
WriteReg(ERDPTL, ReadPT.v[0]);
WriteReg(ERDPTH, ReadPT.v[1]);
}
/******************************************************************************
* Function: PTR_BASE MACSetWritePtr(PTR_BASE Address)
*
* PreCondition: None
*
* Input: Address: Address to seek to
*
* Output: INT16U: Old EWRPT location
*
* Side Effects: None
*
* Overview: SPI write pointer is updated. All calls to
* MACPut() and MACPutArray() will use this new value.
*
* Note: None
*****************************************************************************/
PTR_BASE MACSetWritePtr(PTR_BASE address)
{
WORD_VAL oldVal;
oldVal.v[0] = ReadETHReg(EWRPTL).Val;
oldVal.v[1] = ReadETHReg(EWRPTH).Val;
// Set the SPI write pointer to the new calculated value
WriteReg(EWRPTL, ((WORD_VAL*)&address)->v[0]);
WriteReg(EWRPTH, ((WORD_VAL*)&address)->v[1]);
return oldVal.Val;
}
/******************************************************************************
* Function: PTR_BASE MACSetReadPtr(PTR_BASE Address)
*
* PreCondition: None
*
* Input: Address: Address to seek to
*
* Output: INT16U: Old ERDPT value
*
* Side Effects: None
*
* Overview: SPI write pointer is updated. All calls to
* MACPut() and MACPutArray() will use this new value.
*
* Note: None
*****************************************************************************/
PTR_BASE MACSetReadPtr(PTR_BASE address)
{
WORD_VAL oldVal;
oldVal.v[0] = ReadETHReg(ERDPTL).Val;
oldVal.v[1] = ReadETHReg(ERDPTH).Val;
// Set the SPI write pointer to the new calculated value
WriteReg(ERDPTL, ((WORD_VAL*)&address)->v[0]);
WriteReg(ERDPTH, ((WORD_VAL*)&address)->v[1]);
return oldVal.Val;
}
/******************************************************************************
* Function: INT16U MACCalcRxChecksum(INT16U offset, INT16U len)
*
* PreCondition: None
*
* Input: offset - Number of bytes beyond the beginning of the
* Ethernet data (first byte after the type field)
* where the checksum should begin
* len - Total number of bytes to include in the checksum
*
* Output: 16-bit checksum as defined by RFC 793.
*
* Side Effects: None
*
* Overview: This function performs a checksum calculation in the MAC
* buffer itself
*
* Note: None
*****************************************************************************/
INT16U MACCalcRxChecksum(INT16U offset, INT16U len)
{
WORD_VAL temp;
WORD_VAL RDSave;
// Add the offset requested by firmware plus the Ethernet header
temp.Val = CurrentPacketLocation.Val + sizeof(ENC_PREAMBLE) + offset;
if(temp.Val > RXSTOP) // Adjust value if a wrap is needed
{
temp.Val -= RXSIZE;
}
RDSave.v[0] = ReadETHReg(ERDPTL).Val;
RDSave.v[1] = ReadETHReg(ERDPTH).Val;
WriteReg(ERDPTL, temp.v[0]);
WriteReg(ERDPTH, temp.v[1]);
temp.Val = CalcIPBufferChecksum(len);
WriteReg(ERDPTL, RDSave.v[0]);
WriteReg(ERDPTH, RDSave.v[1]);
return temp.Val;
}
/******************************************************************************
* Function: INT16U CalcIPBufferChecksum(INT16U len)
*
* PreCondition: Read buffer pointer set to starting of checksum data
*
* Input: len: Total number of bytes to calculate the checksum over.
* The first byte included in the checksum is the byte
* pointed to by ERDPT, which is updated by calls to
* MACSetReadPtr(), MACGet(), MACGetArray(),
* MACGetHeader(), etc.
*
* Output: 16-bit checksum as defined by RFC 793
*
* Side Effects: None
*
* Overview: This function performs a checksum calculation in the MAC
* buffer itself. The ENC28J60 has a hardware DMA module
* which can calculate the checksum faster than software, so
* this function replaces the CaclIPBufferChecksum() function
* defined in the helpers.c file. Through the use of
* preprocessor defines, this replacement is automatic.
*
* Note: This function works either in the RX buffer area or the TX
* buffer area. No validation is done on the len parameter.
*****************************************************************************/
INT16U CalcIPBufferChecksum(INT16U len)
{
WORD_VAL Start;
DWORD_VAL Checksum = {0x00000000ul};
INT16U ChunkLen;
INT16U DataBuffer[10];
INT16U *DataPtr;
// Save the SPI read pointer starting address
Start.v[0] = ReadETHReg(ERDPTL).Val;
Start.v[1] = ReadETHReg(ERDPTH).Val;
while(len)
{
// Obtain a chunk of data (less SPI overhead compared
// to requesting one byte at a time)
ChunkLen = len > sizeof(DataBuffer) ? sizeof(DataBuffer) : len;
MACGetArray((INT8U*)DataBuffer, ChunkLen);
len -= ChunkLen;
// Take care of a last odd numbered data byte
if(((WORD_VAL*)&ChunkLen)->bits.b0)
{
((INT8U*)DataBuffer)[ChunkLen] = 0x00;
ChunkLen++;
}
// Calculate the checksum over this chunk
DataPtr = DataBuffer;
while(ChunkLen)
{
Checksum.Val += *DataPtr++;
ChunkLen -= 2;
}
}
// Restore old read pointer location
WriteReg(ERDPTL, Start.v[0]);
WriteReg(ERDPTH, Start.v[1]);
// Do an end-around carry (one's complement arrithmatic)
Checksum.Val = (DWORD)Checksum.w[0] + (DWORD)Checksum.w[1];
// Do another end-around carry in case if the prior add
// caused a carry out
Checksum.w[0] += Checksum.w[1];
// Return the resulting checksum
return ~Checksum.w[0];
}
/******************************************************************************
* Function: void MACMemCopyAsync(PTR_BASE destAddr, PTR_BASE sourceAddr, INT16U len)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
*
* Input: destAddr: Destination address in the Ethernet memory to
* copy to. If (PTR_BASE)-1 is specified, the
* current EWRPT value will be used instead.
* sourceAddr: Source address to read from. If (PTR_BASE)-1 is
* specified, the current ERDPT value will be used
* instead.
* len: Number of bytes to copy
*
* Output: Byte read from the ENC28J60's RAM
*
* Side Effects: None
*
* Overview: Bytes are asynchrnously transfered within the buffer. Call
* MACIsMemCopyDone() to see when the transfer is complete.
*
* Note: If a prior transfer is already in progress prior to
* calling this function, this function will block until it
* can start this transfer.
*
* If (PTR_BASE)-1 is used for the sourceAddr or destAddr
* parameters, then that pointer will get updated with the
* next address after the read or write.
*****************************************************************************/
void MACMemCopyAsync(PTR_BASE destAddr, PTR_BASE sourceAddr, INT16U len)
{
WORD_VAL ReadSave, WriteSave;
BOOL UpdateWritePointer = FALSE;
BOOL UpdateReadPointer = FALSE;
if(destAddr == (PTR_BASE)-1)
{
UpdateWritePointer = TRUE;
destAddr = ReadETHReg(EWRPTL).Val;
((INT8U*)&destAddr)[1] = ReadETHReg(EWRPTH).Val;
}
if(sourceAddr == (PTR_BASE)-1)
{
UpdateReadPointer = TRUE;
sourceAddr = ReadETHReg(ERDPTL).Val;
((INT8U*)&sourceAddr)[1] = ReadETHReg(ERDPTH).Val;
}
// Handle special conditions where len == 0 or len == 1
// The DMA module is not capable of handling those corner cases
if(len <= 1u)
{
if(!UpdateReadPointer)
{
ReadSave.v[0] = ReadETHReg(ERDPTL).Val;
ReadSave.v[1] = ReadETHReg(ERDPTH).Val;
}
if(!UpdateWritePointer)
{
WriteSave.v[0] = ReadETHReg(EWRPTL).Val;
WriteSave.v[1] = ReadETHReg(EWRPTH).Val;
}
WriteReg(ERDPTL, ((INT8U*)&sourceAddr)[0]);
WriteReg(ERDPTH, ((INT8U*)&sourceAddr)[1]);
WriteReg(EWRPTL, ((INT8U*)&destAddr)[0]);
WriteReg(EWRPTH, ((INT8U*)&destAddr)[1]);
while(len--)
MACPut(MACGet());
if(!UpdateReadPointer)
{
WriteReg(ERDPTL, ReadSave.v[0]);
WriteReg(ERDPTH, ReadSave.v[1]);
}
if(!UpdateWritePointer)
{
WriteReg(EWRPTL, WriteSave.v[0]);
WriteReg(EWRPTH, WriteSave.v[1]);
}
}
else
{
if(UpdateWritePointer)
{
WriteSave.Val = destAddr + len;
WriteReg(EWRPTL, WriteSave.v[0]);
WriteReg(EWRPTH, WriteSave.v[1]);
}
len += sourceAddr - 1;
while(ReadETHReg(ECON1).ECON1bits.DMAST);
WriteReg(EDMASTL, ((INT8U*)&sourceAddr)[0]);
WriteReg(EDMASTH, ((INT8U*)&sourceAddr)[1]);
WriteReg(EDMADSTL, ((INT8U*)&destAddr)[0]);
WriteReg(EDMADSTH, ((INT8U*)&destAddr)[1]);
if((sourceAddr <= RXSTOP) && (len > RXSTOP)) //&& (sourceAddr >= RXSTART))
len -= RXSIZE;
WriteReg(EDMANDL, ((INT8U*)&len)[0]);
WriteReg(EDMANDH, ((INT8U*)&len)[1]);
BFCReg(ECON1, ECON1_CSUMEN);
BFSReg(ECON1, ECON1_DMAST);
if(UpdateReadPointer)
{
len++;
if((sourceAddr <= RXSTOP) && (len > RXSTOP)) //&& (sourceAddr >= RXSTART))
len -= RXSIZE;
WriteReg(ERDPTL, ((INT8U*)&len)[0]);
WriteReg(ERDPTH, ((INT8U*)&len)[1]);
}
}
}
BOOL MACIsMemCopyDone(void)
{
return !ReadETHReg(ECON1).ECON1bits.DMAST;
}
/******************************************************************************
* Function: INT8U MACGet()
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
* ERDPT must point to the place to read from.
*
* Input: None
*
* Output: Byte read from the ENC28J60's RAM
*
* Side Effects: None
*
* Overview: MACGet returns the byte pointed to by ERDPT and
* increments ERDPT so MACGet() can be called again. The
* increment will follow the receive buffer wrapping boundary.
*
* Note: None
*****************************************************************************/
INT8U MACGet()
{
INT8U Result;
ENC_CS_IO = 0;
ClearSPIDoneFlag();
#if defined(__C32__)
{
// Send the opcode and read a byte in one 16-bit operation
ENC_SPICON1bits.MODE16 = 1;
ENC_SSPBUF = RBM<<8 | 0x00; // Send Read Buffer Memory command plus 8 dummy bits to generate clocks for the return result
WaitForDataByte(); // Wait until INT8U is transmitted
ENC_SPICON1bits.MODE16 = 0;
}
#elif defined(__C30__)
{
// Send the opcode and read a byte in one 16-bit operation
ENC_SPISTATbits.SPIEN = 0;
ENC_SPICON1bits.MODE16 = 1;
ENC_SPISTATbits.SPIEN = 1;
ENC_SSPBUF = RBM<<8 | 0x00; // Send Read Buffer Memory command plus 8 dummy bits to generate clocks for the return result
WaitForDataByte(); // Wait until INT8U is transmitted
ENC_SPISTATbits.SPIEN = 0;
ENC_SPICON1bits.MODE16 = 0;
ENC_SPISTATbits.SPIEN = 1;
}
#else
{
// Send the opcode and read a byte in two 8-bit operations
ENC_SSPBUF = RBM;
WaitForDataByte(); // Wait until opcode/address is transmitted.
Result = ENC_SSPBUF;
ENC_SSPBUF = 0; // Send a dummy byte to receive the register
// contents.
WaitForDataByte(); // Wait until register is received.
}
#endif
Result = ENC_SSPBUF;
ENC_CS_IO = 1;
return Result;
}//end MACGet
/******************************************************************************
* Function: INT16U MACGetArray(INT8U *val, INT16U len)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
* ERDPT must point to the place to read from.
*
* Input: *val: Pointer to storage location
* len: Number of bytes to read from the data buffer.
*
* Output: Byte(s) of data read from the data buffer.
*
* Side Effects: None
*
* Overview: Burst reads several sequential bytes from the data buffer
* and places them into local memory. With SPI burst support,
* it performs much faster than multiple MACGet() calls.
* ERDPT is incremented after each byte, following the same
* rules as MACGet().
*
* Note: None
*****************************************************************************/
INT16U MACGetArray(INT8U *val, INT16U len)
{
// Workaround needed on HPC Explorer (classic) board to prevent interference
// with I2C temperature sensor on the same SPI wires
#if defined(__18F8722) || defined(_18F8722) || defined(__18F8723) || defined(_18F8723)
INT16U i;
volatile INT8U Dummy;
i = len;
Dummy = 0xFF;
ClearSPIDoneFlag();
while(i--)
{
if(((BYTE_VAL*)&Dummy)->bits.b0)
{
// End bust operation
ENC_CS_IO = 1;
((BYTE_VAL*)&Dummy)->bits.b0 = 0;
// Start the burst operation
ENC_CS_IO = 0;
ENC_SSPBUF = RBM; // Send the Read Buffer Memory opcode.
WaitForDataByte(); // Wait until opcode/address is transmitted.
}
else
Dummy = 0xFF;
ENC_SSPBUF = 0; // Send a dummy byte to receive a byte
if(val)
{
WaitForDataByte(); // Wait until byte is received.
*val++ = ENC_SSPBUF;
}
else
{
WaitForDataByte(); // Wait until byte is received.
}
}
ENC_CS_IO = 1;
return len;
#else
INT16U i;
volatile INT8U Dummy;
// Start the burst operation
ENC_CS_IO = 0;
ClearSPIDoneFlag();
ENC_SSPBUF = RBM; // Send the Read Buffer Memory opcode.
i = 0;
if(val)
val--;
WaitForDataByte(); // Wait until opcode/address is transmitted.
Dummy = ENC_SSPBUF;
#if defined(__C32__)
{
DWORD_VAL dwv;
// Read the data, 4 bytes at a time, for as long as possible
if(len >= 4)
{
ENC_SPICON1bits.MODE32 = 1;
while(1)
{
ENC_SSPBUF = 0x00000000; // Send a dummy DWORD to generate 32 clocks
i += 4;
WaitForDataByte(); // Wait until DWORD is transmitted
dwv.Val = ENC_SSPBUF;
if(val)
{
*(++val) = dwv.v[3];
*(++val) = dwv.v[2];
*(++val) = dwv.v[1];
*(++val) = dwv.v[0];
}
if(len - i < 4)
break;
};
ENC_SPICON1bits.MODE32 = 0;
}
}
#elif defined(__C30__)
{
WORD_VAL wv;
// Read the data, 2 bytes at a time, for as long as possible
if(len >= 2)
{
ENC_SPISTATbits.SPIEN = 0;
ENC_SPICON1bits.MODE16 = 1;
ENC_SPISTATbits.SPIEN = 1;
while(1)
{
ENC_SSPBUF = 0x0000; // Send a dummy INT8U to generate 32 clocks
i += 2;
WaitForDataByte(); // Wait until INT8U is transmitted
wv.Val = ENC_SSPBUF;
if(val)
{
*(++val) = wv.v[1];
*(++val) = wv.v[0];
}
if(len - i < 2)
break;
};
ENC_SPISTATbits.SPIEN = 0;
ENC_SPICON1bits.MODE16 = 0;
ENC_SPISTATbits.SPIEN = 1;
}
}
#endif
// Read the data
while(i<len)
{
ENC_SSPBUF = 0; // Send a dummy byte to receive a byte
i++;
if(val)
{
val++;
WaitForDataByte(); // Wait until byte is received.
*val = ENC_SSPBUF;
}
else
{
WaitForDataByte(); // Wait until byte is received.
Dummy = ENC_SSPBUF;
}
};
// Terminate the burst operation
ENC_CS_IO = 1;
return i;
#endif
}//end MACGetArray
/******************************************************************************
* Function: void MACPut(INT8U val)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
* EWRPT must point to the location to begin writing.
*
* Input: Byte to write into the ENC28J60 buffer memory
*
* Output: None
*
* Side Effects: None
*
* Overview: MACPut outputs the Write Buffer Memory opcode/constant
* (8 bits) and data to write (8 bits) over the SPI.
* EWRPT is incremented after the write.
*
* Note: None
*****************************************************************************/
void MACPut(INT8U val)
{
volatile INT8U Dummy;
ENC_CS_IO = 0;
ClearSPIDoneFlag();
#if defined(__C32__)
{
// Send the Write Buffer Memory and data, in on 16-bit write
ENC_SPICON1bits.MODE16 = 1;
ENC_SSPBUF = (WBM<<8) | (INT16U)val; // Start sending the INT8U
WaitForDataByte(); // Wait until INT8U is transmitted
ENC_SPICON1bits.MODE16 = 0;
}
#elif defined(__C30__)
{
// Send the Write Buffer Memory and data, in on 16-bit write
ENC_SPISTATbits.SPIEN = 0;
ENC_SPICON1bits.MODE16 = 1;
ENC_SPISTATbits.SPIEN = 1;
ENC_SSPBUF = (WBM<<8) | (INT16U)val; // Start sending the INT8U
WaitForDataByte(); // Wait until INT8U is transmitted
ENC_SPISTATbits.SPIEN = 0;
ENC_SPICON1bits.MODE16 = 0;
ENC_SPISTATbits.SPIEN = 1;
}
#else
{
ENC_SSPBUF = WBM; // Send the opcode and constant.
WaitForDataByte(); // Wait until opcode/constant is transmitted.
Dummy = ENC_SSPBUF;
ENC_SSPBUF = val; // Send the byte to be writen.
WaitForDataByte(); // Wait until finished transmitting
}
#endif
Dummy = ENC_SSPBUF;
ENC_CS_IO = 1;
}//end MACPut
/******************************************************************************
* Function: void MACPutArray(INT8U *val, INT16U len)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
* EWRPT must point to the location to begin writing.
*
* Input: *val: Pointer to source of bytes to copy.
* len: Number of bytes to write to the data buffer.
*
* Output: None
*
* Side Effects: None
*
* Overview: MACPutArray writes several sequential bytes to the
* ENC28J60 RAM. It performs faster than multiple MACPut()
* calls. EWRPT is incremented by len.
*
* Note: None
*****************************************************************************/
void MACPutArray(INT8U *val, INT16U len)
{
// Workaround needed on HPC Explorer (classic) board to prevent interference
// with I2C temperature sensor on the same SPI wires
#if defined(__18F8722) || defined(_18F8722) || defined(__18F8723) || defined(_18F8723)
INT16U i;
volatile INT8U Dummy;
i = len;
Dummy = 0xFF;
ClearSPIDoneFlag();
while(i--)
{
if(((BYTE_VAL*)&Dummy)->bits.b0)
{
// End bust operation
ENC_CS_IO = 1;
((BYTE_VAL*)&Dummy)->bits.b0 = 0;
// Start the burst operation
ENC_CS_IO = 0;
ENC_SSPBUF = WBM; // Send the Read Buffer Memory opcode.
WaitForDataByte(); // Wait until opcode/address is transmitted.
}
else
Dummy = 0xFF;
ENC_SSPBUF = *val++; // Send byte
WaitForDataByte(); // Wait until byte is sent
}
ENC_CS_IO = 1;
return;
#else
volatile INT8U Dummy;
// Select the chip and send the proper opcode
ENC_CS_IO = 0;
ClearSPIDoneFlag();
ENC_SSPBUF = WBM; // Send the Write Buffer Memory opcode
WaitForDataByte(); // Wait until opcode/constant is transmitted.
Dummy = ENC_SSPBUF;
#if defined(__C32__)
{
DWORD_VAL dwv;
// Send the data, 4 bytes at a time, for as long as possible
if(len >= 4)
{
dwv.v[3] = *val++;
dwv.v[2] = *val++;
dwv.v[1] = *val++;
dwv.v[0] = *val++;
ENC_SPICON1bits.MODE32 = 1;
while(1)
{
ENC_SSPBUF = dwv.Val; // Start sending the DWORD
len -= 4;
if(len < 4)
break;
dwv.v[3] = *val++;
dwv.v[2] = *val++;
dwv.v[1] = *val++;
dwv.v[0] = *val++;
WaitForDataByte(); // Wait until DWORD is transmitted
Dummy = ENC_SSPBUF;
};
WaitForDataByte(); // Wait until DWORD is transmitted
Dummy = ENC_SSPBUF;
ENC_SPICON1bits.MODE32 = 0;
}
}
#elif defined(__C30__)
{
WORD_VAL wv;
// Send the data, 2 bytes at a time, for as long as possible
if(len >= 2)
{
wv.v[1] = *val++;
wv.v[0] = *val++;
ENC_SPISTATbits.SPIEN = 0;
ENC_SPICON1bits.MODE16 = 1;
ENC_SPISTATbits.SPIEN = 1;
while(1)
{
ENC_SSPBUF = wv.Val; // Start sending the INT8U
len -= 2;
if(len < 2)
break;
wv.v[1] = *val++;
wv.v[0] = *val++;
WaitForDataByte(); // Wait until INT8U is transmitted
Dummy = ENC_SSPBUF;
};
WaitForDataByte(); // Wait until INT8U is transmitted
Dummy = ENC_SSPBUF;
ENC_SPISTATbits.SPIEN = 0;
ENC_SPICON1bits.MODE16 = 0;
ENC_SPISTATbits.SPIEN = 1;
}
}
#endif
// Send the data, one byte at a time
while(len)
{
ENC_SSPBUF = *val; // Start sending the byte
val++; // Increment after writing to ENC_SSPBUF to increase speed
len--; // Decrement after writing to ENC_SSPBUF to increase speed
WaitForDataByte(); // Wait until byte is transmitted
Dummy = ENC_SSPBUF;
};
// Terminate the burst operation
ENC_CS_IO = 1;
#endif
}//end MACPutArray
#if defined(__18CXX)
/******************************************************************************
* Function: void MACPutROMArray(ROM INT8U *val, INT16U len)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
* EWRPT must point to the location to begin writing.
*
* Input: *val: Pointer to source of bytes to copy.
* len: Number of bytes to write to the data buffer.
*
* Output: None
*
* Side Effects: None
*
* Overview: MACPutArray writes several sequential bytes to the
* ENC28J60 RAM. It performs faster than multiple MACPut()
* calls. EWRPT is incremented by len.
*
* Note: None
*****************************************************************************/
void MACPutROMArray(ROM INT8U *val, INT16U len)
{
// Workaround needed on HPC Explorer (classic) board to prevent interference
// with I2C temperature sensor on the same SPI wires
#if defined(__18F8722) || defined(_18F8722) || defined(__18F8723) || defined(_18F8723)
INT16U i;
volatile INT8U Dummy;
i = len;
Dummy = 0xFF;
ClearSPIDoneFlag();
while(i--)
{
if(((BYTE_VAL*)&Dummy)->bits.b0)
{
// End bust operation
ENC_CS_IO = 1;
((BYTE_VAL*)&Dummy)->bits.b0 = 0;
// Start the burst operation
ENC_CS_IO = 0;
ENC_SSPBUF = WBM; // Send the Read Buffer Memory opcode.
WaitForDataByte(); // Wait until opcode/address is transmitted.
}
else
Dummy = 0xFF;
ENC_SSPBUF = *val++; // Send byte
WaitForDataByte(); // Wait until byte is sent
}
ENC_CS_IO = 1;
return;
#else
volatile INT8U Dummy;
// Select the chip and send the proper opcode
ENC_CS_IO = 0;
ClearSPIDoneFlag();
ENC_SSPBUF = WBM; // Send the Write Buffer Memory opcode
WaitForDataByte(); // Wait until opcode/constant is transmitted.
Dummy = ENC_SSPBUF;
// Send the data
while(len)
{
ENC_SSPBUF = *val; // Start sending the byte
val++; // Increment after writing to ENC_SSPBUF to increase speed
len--; // Decrement after writing to ENC_SSPBUF to increase speed
WaitForDataByte(); // Wait until byte is transmitted
Dummy = ENC_SSPBUF;
};
// Terminate the burst operation
ENC_CS_IO = 1;
#endif
}//end MACPutROMArray
#endif
/******************************************************************************
* Function: static void SendSystemReset(void)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: SendSystemReset sends the System Reset SPI command to
* the Ethernet controller. It resets all register contents
* (except for ECOCON) and returns the device to the power
* on default state.
*
* Note: None
*****************************************************************************/
static void SendSystemReset(void)
{
volatile INT8U Dummy;
// Note: The power save feature may prevent the reset from executing, so
// we must make sure that the device is not in power save before issuing
// a reset.
BFCReg(ECON2, ECON2_PWRSV);
// Give some opportunity for the regulator to reach normal regulation and
// have all clocks running
DelayMs(1);
// Execute the System Reset command
ENC_CS_IO = 0;
ClearSPIDoneFlag();
ENC_SSPBUF = SR;
WaitForDataByte(); // Wait until the command is transmitted.
Dummy = ENC_SSPBUF;
ENC_CS_IO = 1;
// Wait for the oscillator start up timer and PHY to become ready
DelayMs(1);
}//end SendSystemReset
/******************************************************************************
* Function: REG ReadETHReg(INT8U Address)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
* Bank select bits must be set corresponding to the register
* to read from.
*
* Input: 5 bit address of the ETH control register to read from.
* The top 3 bits must be 0.
*
* Output: Byte read from the Ethernet controller's ETH register.
*
* Side Effects: None
*
* Overview: ReadETHReg sends the 8 bit RCR opcode/Address byte over
* the SPI and then retrives the register contents in the
* next 8 SPI clocks.
*
* Note: This routine cannot be used to access MAC/MII or PHY
* registers. Use ReadMACReg() or ReadPHYReg() for that
* purpose.
*****************************************************************************/
static REG ReadETHReg(INT8U Address)
{
REG r;
// Select the chip and send the Read Control Register opcode/address
ENC_CS_IO = 0;
ClearSPIDoneFlag();
ENC_SSPBUF = RCR | Address;
WaitForDataByte(); // Wait until the opcode/address is transmitted
r.Val = ENC_SSPBUF;
ENC_SSPBUF = 0; // Send a dummy byte to receive the register
// contents
WaitForDataByte(); // Wait until the register is received
r.Val = ENC_SSPBUF;
ENC_CS_IO = 1;
return r;
}//end ReadETHReg
/******************************************************************************
* Function: REG ReadMACReg(INT8U Address)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
* Bank select bits must be set corresponding to the register
* to read from.
*
* Input: 5 bit address of the MAC or MII register to read from.
* The top 3 bits must be 0.
*
* Output: Byte read from the Ethernet controller's MAC/MII register.
*
* Side Effects: None
*
* Overview: ReadMACReg sends the 8 bit RCR opcode/Address byte as well
* as a dummy byte over the SPI and then retrives the
* register contents in the last 8 SPI clocks.
*
* Note: This routine cannot be used to access ETH or PHY
* registers. Use ReadETHReg() or ReadPHYReg() for that
* purpose.
*****************************************************************************/
static REG ReadMACReg(INT8U Address)
{
REG r;
ENC_CS_IO = 0;
ClearSPIDoneFlag();
ENC_SSPBUF = RCR | Address; // Send the Read Control Register opcode and
// address.
WaitForDataByte(); // Wait until opcode/address is transmitted.
r.Val = ENC_SSPBUF;
ENC_SSPBUF = 0; // Send a dummy byte
WaitForDataByte(); // Wait for the dummy byte to be transmitted
r.Val = ENC_SSPBUF;
ENC_SSPBUF = 0; // Send another dummy byte to receive the register
// contents.
WaitForDataByte(); // Wait until register is received.
r.Val = ENC_SSPBUF;
ENC_CS_IO = 1;
return r;
}//end ReadMACReg
/******************************************************************************
* Function: ReadPHYReg
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
*
* Input: Address of the PHY register to read from.
*
* Output: 16 bits of data read from the PHY register.
*
* Side Effects: None
*
* Overview: ReadPHYReg performs an MII read operation. While in
* progress, it simply polls the MII BUSY bit wasting time
* (10.24us).
*
* Note: None
*****************************************************************************/
PHYREG ReadPHYReg(INT8U Register)
{
PHYREG Result;
// Set the right address and start the register read operation
BankSel(MIREGADR);
WriteReg((INT8U)MIREGADR, Register);
WriteReg((INT8U)MICMD, MICMD_MIIRD);
// Loop to wait until the PHY register has been read through the MII
// This requires 10.24us
BankSel(MISTAT);
while(ReadMACReg((INT8U)MISTAT).MISTATbits.BUSY);
// Stop reading
BankSel(MIREGADR);
WriteReg((INT8U)MICMD, 0x00);
// Obtain results and return
Result.VAL.v[0] = ReadMACReg((INT8U)MIRDL).Val;
Result.VAL.v[1] = ReadMACReg((INT8U)MIRDH).Val;
BankSel(ERDPTL); // Return to Bank 0
return Result;
}//end ReadPHYReg
/******************************************************************************
* Function: void WriteReg(INT8U Address, INT8U Data)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
* Bank select bits must be set corresponding to the register
* to modify.
*
* Input: 5 bit address of the ETH, MAC, or MII register to modify.
* The top 3 bits must be 0.
* INT8U to be written into the register.
*
* Output: None
*
* Side Effects: None
*
* Overview: WriteReg sends the 8 bit WCR opcode/Address byte over the
* SPI and then sends the data to write in the next 8 SPI
* clocks.
*
* Note: This routine is almost identical to the BFCReg() and
* BFSReg() functions. It is seperate to maximize speed.
* Unlike the ReadETHReg/ReadMACReg functions, WriteReg()
* can write to any ETH or MAC register. Writing to PHY
* registers must be accomplished with WritePHYReg().
*****************************************************************************/
static void WriteReg(INT8U Address, INT8U Data)
{
volatile INT8U Dummy;
ENC_CS_IO = 0;
ClearSPIDoneFlag();
#if defined(__C32__)
{
// Send the Write Buffer Memory and data, in on 16-bit write
ENC_SPICON1bits.MODE16 = 1;
ENC_SSPBUF = ((WCR | Address)<<8) | (INT16U)Data; // Start sending the INT8U
WaitForDataByte(); // Wait until INT8U is transmitted
ENC_SPICON1bits.MODE16 = 0;
}
#else
{
ENC_SSPBUF = WCR | Address; // Send the opcode and address.
WaitForDataByte(); // Wait until opcode/constant is transmitted.
Dummy = ENC_SSPBUF;
ENC_SSPBUF = Data; // Send the byte to be writen.
WaitForDataByte(); // Wait until finished transmitting
}
#endif
Dummy = ENC_SSPBUF;
ENC_CS_IO = 1;
}//end WriteReg
/******************************************************************************
* Function: void BFCReg(INT8U Address, INT8U Data)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
* Bank select bits must be set corresponding to the register
* to modify.
*
* Input: 5 bit address of the register to modify. The top 3 bits
* must be 0.
* Byte to be used with the Bit Field Clear operation.
*
* Output: None
*
* Side Effects: None
*
* Overview: BFCReg sends the 8 bit BFC opcode/Address byte over the
* SPI and then sends the data in the next 8 SPI clocks.
*
* Note: This routine is almost identical to the WriteReg() and
* BFSReg() functions. It is separate to maximize speed.
* BFCReg() must only be used on ETH registers.
*****************************************************************************/
static void BFCReg(INT8U Address, INT8U Data)
{
volatile INT8U Dummy;
ENC_CS_IO = 0;
ClearSPIDoneFlag();
ENC_SSPBUF = BFC | Address; // Send the opcode and address.
WaitForDataByte(); // Wait until opcode/address is transmitted.
Dummy = ENC_SSPBUF;
ENC_SSPBUF = Data; // Send the byte to be writen.
WaitForDataByte(); // Wait until register is written.
Dummy = ENC_SSPBUF;
ENC_CS_IO = 1;
}//end BFCReg
/******************************************************************************
* Function: void BFSReg(INT8U Address, INT8U Data)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
* Bank select bits must be set corresponding to the register
* to modify.
*
* Input: 5 bit address of the register to modify. The top 3 bits
* must be 0.
* Byte to be used with the Bit Field Set operation.
*
* Output: None
*
* Side Effects: None
*
* Overview: BFSReg sends the 8 bit BFC opcode/Address byte over the
* SPI and then sends the data in the next 8 SPI clocks.
*
* Note: This routine is almost identical to the WriteReg() and
* BFCReg() functions. It is separate to maximize speed.
* BFSReg() must only be used on ETH registers.
*****************************************************************************/
static void BFSReg(INT8U Address, INT8U Data)
{
volatile INT8U Dummy;
ENC_CS_IO = 0;
ClearSPIDoneFlag();
ENC_SSPBUF = BFS | Address; // Send the opcode and address.
WaitForDataByte(); // Wait until opcode/address is transmitted.
Dummy = ENC_SSPBUF;
ENC_SSPBUF = Data; // Send the byte to be writen.
WaitForDataByte(); // Wait until register is written.
Dummy = ENC_SSPBUF;
ENC_CS_IO = 1;
}//end BFSReg
/******************************************************************************
* Function: WritePHYReg
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
*
* Input: Address of the PHY register to write to.
* 16 bits of data to write to PHY register.
*
* Output: None
*
* Side Effects: Alters bank bits to point to Bank 3
*
* Overview: WritePHYReg performs an MII write operation. While in
* progress, it simply polls the MII BUSY bit wasting time.
*
* Note: None
*****************************************************************************/
void WritePHYReg(INT8U Register, INT16U Data)
{
// Write the register address
BankSel(MIREGADR);
WriteReg((INT8U)MIREGADR, Register);
// Write the data
// Order is important: write low byte first, high byte last
WriteReg((INT8U)MIWRL, ((WORD_VAL*)&Data)->v[0]);
WriteReg((INT8U)MIWRH, ((WORD_VAL*)&Data)->v[1]);
// Wait until the PHY register has been written
BankSel(MISTAT);
while(ReadMACReg((INT8U)MISTAT).MISTATbits.BUSY);
BankSel(ERDPTL); // Return to Bank 0
}//end WritePHYReg
/******************************************************************************
* Function: BankSel
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
*
* Input: Register address with the high byte containing the 2 bank
* select 2 bits.
*
* Output: None
*
* Side Effects: None
*
* Overview: BankSel takes the high byte of a register address and
* changes the bank select bits in ETHCON1 to match.
*
* Note: None
*****************************************************************************/
static void BankSel(INT16U Register)
{
BFCReg(ECON1, ECON1_BSEL1 | ECON1_BSEL0);
BFSReg(ECON1, ((WORD_VAL*)&Register)->v[1]);
}//end BankSel
/******************************************************************************
* Function: void MACPowerDown(void)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: MACPowerDown puts the ENC28J60 in low power sleep mode. In
* sleep mode, no packets can be transmitted or received.
* All MAC and PHY registers should not be accessed.
*
* Note: If a packet is being transmitted while this function is
* called, this function will block until it is it complete.
* If anything is being received, it will be completed.
*****************************************************************************/
void MACPowerDown(void)
{
// Disable packet reception
BFCReg(ECON1, ECON1_RXEN);
// Make sure any last packet which was in-progress when RXEN was cleared
// is completed
while(ReadETHReg(ESTAT).ESTATbits.RXBUSY);
// If a packet is being transmitted, wait for it to finish
while(ReadETHReg(ECON1).ECON1bits.TXRTS);
// Enter sleep mode
BFSReg(ECON2, ECON2_PWRSV);
}//end MACPowerDown
/******************************************************************************
* Function: void MACPowerUp(void)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
*
* Input: None
*
* Output: None
*
* Side Effects: None
*
* Overview: MACPowerUp returns the ENC28J60 back to normal operation
* after a previous call to MACPowerDown(). Calling this
* function when already powered up will have no effect.
*
* Note: If a link partner is present, it will take 10s of
* milliseconds before a new link will be established after
* waking up. While not linked, packets which are
* transmitted will most likely be lost. MACIsLinked() can
* be called to determine if a link is established.
*****************************************************************************/
void MACPowerUp(void)
{
// Leave power down mode
BFCReg(ECON2, ECON2_PWRSV);
// Wait for the 300us Oscillator Startup Timer (OST) to time out. This
// delay is required for the PHY module to return to an operational state.
while(!ReadETHReg(ESTAT).ESTATbits.CLKRDY);
// Enable packet reception
BFSReg(ECON1, ECON1_RXEN);
}//end MACPowerUp
/******************************************************************************
* Function: void SetCLKOUT(INT8U NewConfig)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
*
* Input: NewConfig - 0x00: CLKOUT disabled (pin driven low)
* 0x01: Divide by 1 (25 MHz)
* 0x02: Divide by 2 (12.5 MHz)
* 0x03: Divide by 3 (8.333333 MHz)
* 0x04: Divide by 4 (6.25 MHz, POR default)
* 0x05: Divide by 8 (3.125 MHz)
*
* Output: None
*
* Side Effects: None
*
* Overview: Writes the value of NewConfig into the ECOCON register.
* The CLKOUT pin will beginning outputting the new frequency
* immediately.
*
* Note:
*****************************************************************************/
void SetCLKOUT(INT8U NewConfig)
{
BankSel(ECOCON);
WriteReg((INT8U)ECOCON, NewConfig);
BankSel(ERDPTL);
}//end SetCLKOUT
/******************************************************************************
* Function: INT8U GetCLKOUT(void)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
*
* Input: None
*
* Output: INT8U - 0x00: CLKOUT disabled (pin driven low)
* 0x01: Divide by 1 (25 MHz)
* 0x02: Divide by 2 (12.5 MHz)
* 0x03: Divide by 3 (8.333333 MHz)
* 0x04: Divide by 4 (6.25 MHz, POR default)
* 0x05: Divide by 8 (3.125 MHz)
* 0x06: Reserved
* 0x07: Reserved
*
* Side Effects: None
*
* Overview: Returns the current value of the ECOCON register.
*
* Note: None
*****************************************************************************/
INT8U GetCLKOUT(void)
{
INT8U i;
BankSel(ECOCON);
i = ReadETHReg((INT8U)ECOCON).Val;
BankSel(ERDPTL);
return i;
}//end GetCLKOUT
/******************************************************************************
* Function: void SetRXHashTableEntry(MAC_ADDR DestMACAddr)
*
* PreCondition: SPI bus must be initialized (done in MACInit()).
*
* Input: DestMACAddr: 6 byte group destination MAC address to allow
* through the Hash Table Filter
*
* Output: Sets the appropriate bit in the EHT* registers to allow
* packets sent to DestMACAddr to be received if the Hash
* Table receive filter is enabled
*
* Side Effects: None
*
* Overview: Calculates a CRC-32 using polynomial 0x4C11DB7 and then,
* using bits 28:23 of the CRC, sets the appropriate bit in
* the EHT* registers
*
* Note: This code is commented out to save code space on systems
* that do not need this function. Change the "#if 0" line
* to "#if 1" to uncomment it.
*****************************************************************************/
#if 0
void SetRXHashTableEntry(MAC_ADDR DestMACAddr)
{
DWORD_VAL CRC = {0xFFFFFFFF};
INT8U HTRegister;
INT8U i, j;
// Calculate a CRC-32 over the 6 byte MAC address
// using polynomial 0x4C11DB7
for(i = 0; i < sizeof(MAC_ADDR); i++)
{
INT8U crcnext;
// shift in 8 bits
for(j = 0; j < 8; j++)
{
crcnext = 0;
if(((BYTE_VAL*)&(CRC.v[3]))->bits.b7)
crcnext = 1;
crcnext ^= (((BYTE_VAL*)&DestMACAddr.v[i])->bits.b0);
CRC.Val <<= 1;
if(crcnext)
CRC.Val ^= 0x4C11DB7;
// next bit
DestMACAddr.v[i] >>= 1;
}
}
// CRC-32 calculated, now extract bits 28:23
// Bits 25:23 define where within the Hash Table byte the bit needs to be set
// Bits 28:26 define which of the 8 Hash Table bytes that bits 25:23 apply to
i = CRC.v[3] & 0x1F;
HTRegister = (i >> 2) + (INT8U)EHT0;
i = (i << 1) & 0x06;
((BYTE_VAL*)&i)->bits.b0 = ((BYTE_VAL*)&CRC.v[2])->bits.b7;
// Set the proper bit in the Hash Table
BankSel(EHT0);
BFSReg(HTRegister, 1<<i);
BankSel(ERDPTL); // Return to Bank 0
}
#endif
//// GetRegs is a function for debugging purposes only. It will read all
//// registers and store them in the PIC's RAM so they can be viewed with
//// the ICD2.
//REG Regs[4][32];
//void GetRegs(void)
//{
// INT8U i;
//
// BankSel(0x000);
// for(i=0; i<0x1A; i++)
// Regs[0][i] = ReadETHReg(i);
// for(i=0x1B; i<32; i++)
// Regs[0][i] = ReadETHReg(i);
//
// BankSel(0x100);
// for(i=0; i<0x1A; i++)
// Regs[1][i] = ReadETHReg(i);
// for(i=0x1B; i<32; i++)
// Regs[1][i] = ReadETHReg(i);
//
// BankSel(0x200);
// for(i=0; i<5; i++)
// Regs[2][i] = ReadMACReg(i);
// Regs[2][5] = ReadETHReg(i);
// for(i=6; i<0x0F; i++)
// Regs[2][i] = ReadMACReg(i);
// Regs[2][0x0F] = ReadETHReg(i);
// for(i=0x10; i<0x13; i++)
// Regs[2][i] = ReadMACReg(i);
// Regs[2][0x13] = ReadETHReg(i);
// for(i=0x14; i<0x1A; i++)
// Regs[2][i] = ReadMACReg(i);
// for(i=0x1B; i<32; i++)
// Regs[2][i] = ReadETHReg(i);
//
// BankSel(0x300);
// for(i=0; i<0x06; i++)
// Regs[3][i] = ReadMACReg(i);
// for(i=6; i<0x0A; i++)
// Regs[3][i] = ReadETHReg(i);
// Regs[3][0x0A] = ReadMACReg(i);
// for(i=0x0B; i<0x1A; i++)
// Regs[3][i] = ReadETHReg(i);
// for(i=0x1B; i<32; i++)
// Regs[3][i] = ReadETHReg(i);
//
// Regs[0][0x1A].Val = 0;
// Regs[1][0x1A].Val = 0;
// Regs[2][0x1A].Val = 0;
// Regs[3][0x1A].Val = 0;
//
// BankSel(ERDPTL);
//
// return;
//}
//// Get8KBMem is a function intended for debugging purposes. It will read all
//// Ethernet RAM and output it in hex out the UART
//void Get8KBMem(void)
//{
// WORD_VAL i;
// INT8U v;
// WORD_VAL RDSave;
//
// RDSave.v[0] = ReadETHReg(ERDPTL).Val;
// RDSave.v[1] = ReadETHReg(ERDPTH).Val;
//
// for(i.Val = 0; i.Val < 8192; i.Val++)
// {
// WriteReg(ERDPTL, i.v[0]);
// WriteReg(ERDPTH, i.v[1]);
// v = MACGet();
//
// putcUART('0');
// while(BusyUART());
// putcUART('x');
// while(BusyUART());
// putcUART(btohexa_high(v));
// while(BusyUART());
// putcUART(btohexa_low(v));
// while(BusyUART());
// }
//
// WriteReg(ERDPTL, RDSave.v[0]);
// WriteReg(ERDPTH, RDSave.v[1]);
//
//}
#endif //#if defined(ENC_CS_TRIS)
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