首页 > 代码库 > STM32 4x4矩阵键盘
STM32 4x4矩阵键盘
可同时识别两个键值，并分别显示，用了自己的12864显示，有些注释的地方有乱码请忽略。基于STM32f103vct6.
主函数：
#include "Rect_key.h"#include "12864.h"int main(){ u16 keynum=0; delay_init(); lcd_gpio_init(); lcd_init(); Rect_key_Init(); lcd_6x8(0,0,"STM32 4x4 KEY Test :"); while(1) { keynum=Read_one_key_value(); lcd_6x8_num(50,2,keynum); Read_more_key_value(); }}
12864显示函数：
#ifndef _12864_H#define _12864_H#include "sys.h"#include "delay.h"#define rs PBout(0)#define reset PBout(1)#define cs PBout(2)#define d6 PBout(6)#define d7 PBout(7)extern void lcd_gpio_init(void);extern void lcd_init(void); extern void lcd_clear(void);extern void lcd_clear_y(u8 y);extern void wr_cmd(u8 data1);extern void wr_data(u8 data1);extern void lcd_pos(u8 x,u8 y);extern void lcd_6x8(u8 x, u8 y,u8 ch[]);extern void lcd_6x8_num(u8 x,u8 y,u16 num);#endif
#include "12864.h"const u8 F6X8[][6]={ { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // sp { 0x00, 0x00, 0x00, 0x2f, 0x00, 0x00 }, // ! { 0x00, 0x00, 0x07, 0x00, 0x07, 0x00 }, // " { 0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14 }, // # { 0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12 }, // $ { 0x00, 0x62, 0x64, 0x08, 0x13, 0x23 }, // % { 0x00, 0x36, 0x49, 0x55, 0x22, 0x50 }, // & { 0x00, 0x00, 0x05, 0x03, 0x00, 0x00 }, // ‘ { 0x00, 0x00, 0x1c, 0x22, 0x41, 0x00 }, // ( { 0x00, 0x00, 0x41, 0x22, 0x1c, 0x00 }, // ) { 0x00, 0x14, 0x08, 0x3E, 0x08, 0x14 }, // * { 0x00, 0x08, 0x08, 0x3E, 0x08, 0x08 }, // + { 0x00, 0x00, 0x00, 0xA0, 0x60, 0x00 }, // , { 0x00, 0x08, 0x08, 0x08, 0x08, 0x08 }, // - { 0x00, 0x00, 0x60, 0x60, 0x00, 0x00 }, // . { 0x00, 0x20, 0x10, 0x08, 0x04, 0x02 }, // / { 0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E }, // 0 { 0x00, 0x00, 0x42, 0x7F, 0x40, 0x00 }, // 1 { 0x00, 0x42, 0x61, 0x51, 0x49, 0x46 }, // 2 { 0x00, 0x21, 0x41, 0x45, 0x4B, 0x31 }, // 3 { 0x00, 0x18, 0x14, 0x12, 0x7F, 0x10 }, // 4 { 0x00, 0x27, 0x45, 0x45, 0x45, 0x39 }, // 5 { 0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30 }, // 6 { 0x00, 0x01, 0x71, 0x09, 0x05, 0x03 }, // 7 { 0x00, 0x36, 0x49, 0x49, 0x49, 0x36 }, // 8 { 0x00, 0x06, 0x49, 0x49, 0x29, 0x1E }, // 9 { 0x00, 0x00, 0x36, 0x36, 0x00, 0x00 }, // : { 0x00, 0x00, 0x56, 0x36, 0x00, 0x00 }, // ; { 0x00, 0x08, 0x14, 0x22, 0x41, 0x00 }, // < { 0x00, 0x14, 0x14, 0x14, 0x14, 0x14 }, // = { 0x00, 0x00, 0x41, 0x22, 0x14, 0x08 }, // > { 0x00, 0x02, 0x01, 0x51, 0x09, 0x06 }, // ? { 0x00, 0x32, 0x49, 0x59, 0x51, 0x3E }, // @ { 0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C }, // A { 0x00, 0x7F, 0x49, 0x49, 0x49, 0x36 }, // B { 0x00, 0x3E, 0x41, 0x41, 0x41, 0x22 }, // C { 0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C }, // D { 0x00, 0x7F, 0x49, 0x49, 0x49, 0x41 }, // E { 0x00, 0x7F, 0x09, 0x09, 0x09, 0x01 }, // F { 0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A }, // G { 0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F }, // H { 0x00, 0x00, 0x41, 0x7F, 0x41, 0x00 }, // I { 0x00, 0x20, 0x40, 0x41, 0x3F, 0x01 }, // J { 0x00, 0x7F, 0x08, 0x14, 0x22, 0x41 }, // K { 0x00, 0x7F, 0x40, 0x40, 0x40, 0x40 }, // L { 0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F }, // M { 0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F }, // N { 0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E }, // O { 0x00, 0x7F, 0x09, 0x09, 0x09, 0x06 }, // P { 0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E }, // Q { 0x00, 0x7F, 0x09, 0x19, 0x29, 0x46 }, // R { 0x00, 0x46, 0x49, 0x49, 0x49, 0x31 }, // S { 0x00, 0x01, 0x01, 0x7F, 0x01, 0x01 }, // T { 0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F }, // U { 0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F }, // V { 0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F }, // W { 0x00, 0x63, 0x14, 0x08, 0x14, 0x63 }, // X { 0x00, 0x07, 0x08, 0x70, 0x08, 0x07 }, // Y { 0x00, 0x61, 0x51, 0x49, 0x45, 0x43 }, // Z { 0x00, 0x00, 0x7F, 0x41, 0x41, 0x00 }, // [ { 0x00, 0x55, 0x2A, 0x55, 0x2A, 0x55 }, // 55 { 0x00, 0x00, 0x41, 0x41, 0x7F, 0x00 }, // ] { 0x00, 0x04, 0x02, 0x01, 0x02, 0x04 }, // ^ { 0x00, 0x40, 0x40, 0x40, 0x40, 0x40 }, // _ { 0x00, 0x00, 0x01, 0x02, 0x04, 0x00 }, // ‘ { 0x00, 0x20, 0x54, 0x54, 0x54, 0x78 }, // a { 0x00, 0x7F, 0x48, 0x44, 0x44, 0x38 }, // b { 0x00, 0x38, 0x44, 0x44, 0x44, 0x20 }, // c { 0x00, 0x38, 0x44, 0x44, 0x48, 0x7F }, // d { 0x00, 0x38, 0x54, 0x54, 0x54, 0x18 }, // e { 0x00, 0x08, 0x7E, 0x09, 0x01, 0x02 }, // f { 0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C }, // g { 0x00, 0x7F, 0x08, 0x04, 0x04, 0x78 }, // h { 0x00, 0x00, 0x44, 0x7D, 0x40, 0x00 }, // i { 0x00, 0x40, 0x80, 0x84, 0x7D, 0x00 }, // j { 0x00, 0x7F, 0x10, 0x28, 0x44, 0x00 }, // k { 0x00, 0x00, 0x41, 0x7F, 0x40, 0x00 }, // l { 0x00, 0x7C, 0x04, 0x18, 0x04, 0x78 }, // m { 0x00, 0x7C, 0x08, 0x04, 0x04, 0x78 }, // n { 0x00, 0x38, 0x44, 0x44, 0x44, 0x38 }, // o { 0x00, 0xFC, 0x24, 0x24, 0x24, 0x18 }, // p { 0x00, 0x18, 0x24, 0x24, 0x18, 0xFC }, // q { 0x00, 0x7C, 0x08, 0x04, 0x04, 0x08 }, // r { 0x00, 0x48, 0x54, 0x54, 0x54, 0x20 }, // s { 0x00, 0x04, 0x3F, 0x44, 0x40, 0x20 }, // t { 0x00, 0x3C, 0x40, 0x40, 0x20, 0x7C }, // u { 0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C }, // v { 0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C }, // w { 0x00, 0x44, 0x28, 0x10, 0x28, 0x44 }, // x { 0x00, 0x1C, 0xA0, 0xA0, 0xA0, 0x7C }, // y { 0x00, 0x44, 0x64, 0x54, 0x4C, 0x44 }, // z { 0x14, 0x14, 0x14, 0x14, 0x14, 0x14 } // horiz lines};void lcd_gpio_init(void){ GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_6|GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //ÍÆÍìÊä³ö GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure); //GPIO_ResetBits(GPIOB,GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15); }void wr_cmd(u8 data1){ u8 i; cs=0; rs=0; //Ö¸ÁîÐźŠfor(i=0;i<8;i++) { if((data1<<i)&0x80) d7=1; else d7=0; d6=0; d6=1; }}void wr_data(u8 data1){ u8 i; //cs=0; rs=1; //Êý¾Ý for(i=0;i<8;i++) { if((data1<<i)&0x80) d7=1; else d7=0; d6=0; d6=1; }}void lcd_pos(u8 x,u8 y){ wr_cmd(0xb0+y); //ÉèÖÃÒ³µØÖ· wr_cmd(((x&0xf0)>>4)|0x10); //ÁеØÖ·¸ßËÄλÉèÖà wr_cmd((x&0x0f)|0x01); //ÁеØÖ·µÍËÄλÉèÖà wr_cmd(0xa0); //ÁеØÖ·ÔöÁ¿´Ó×óµ½ÓÒ //wr_cmd(0xe0);}void lcd_init(void) { u8 x,y; d6=1; reset=0; delay_ms(10); reset=1; //¸´Î»Íê±Ï delay_ms(10); wr_cmd(0xe2); //Èí¸´Î» delay_ms(5); wr_cmd(0x2c); //Éýѹ²½¾Û delay_ms(5); wr_cmd(0x2e); //Éýѹ²½¾Û delay_ms(5); wr_cmd(0x2f); //Éýѹ²½¾Û delay_ms(5); wr_cmd(0xc8); //ÐÐɨÃè˳Ðò£º´ÓÉϵ½Ï wr_cmd(0xa0); //ÁÐɨÃè˳Ðò£º´Ó×óµ½ÓÒ wr_cmd(0x40); //ÆðʼÐУºµÚÒ»ÐпªÊ¼ wr_cmd(0xaf); //¿ªÏÔʾ for(y=0;y<8;y++) { wr_cmd(0xb0+y); wr_cmd(0x01); wr_cmd(0x10); for(x=0;x<128;x++) wr_data(0x00); } }void lcd_clear(void){ u8 x,y; for(y=0;y<8;y++) { wr_cmd(0xb0+y); wr_cmd(0x01); wr_cmd(0x10); for(x=0;x<128;x++) wr_data(0x00); } }void lcd_clear_y(u8 y){ u8 x; wr_cmd(0xb0+y); wr_cmd(0x01); wr_cmd(0x10); for(x=0;x<128;x++) wr_data(0x00); }void lcd_6x8(u8 x, u8 y,u8 ch[]) //ÏÔʾ×Ö·û´®{ u8 c=0,i=0,j=0; while (ch[j]!=‘\0‘) { c =ch[j]-32; if(x>126){x=0;y++;} lcd_pos(x,y); for(i=0;i<6;i++) wr_data(F6X8[c][i]); x+=6; j++; }}void lcd_6x8_num(u8 x,u8 y,u16 num) //ÏÔʾÊý×Ö±äÁ¿{ u8 ok=0,c=0,i=0,j=6; int n[7]={0}; if(num==0) { lcd_6x8(x,y,"0 ");// lcd_pos(x,y);// for(j=0;j<7;j++)// wr_data(F6X8[16][j]); } while(num!=0) { n[j]=num%10; //n[6]¸öλ num=num/10; j--; } for (j=0;j<7;j++) { if(n[j]==0&&ok==0); //num=0 else { ok=1; c =n[j]+16; if(x>126) { x=0; y++; } lcd_pos(x,y); for(i=0;i<6;i++) { wr_data(F6X8[c][i]); } x+=6; } } }
接下来是4x4矩阵键盘函数：
#include "12864.h"#define row0 PDout(0)#define row1 PDout(1)#define row2 PDout(2)#define row3 PDout(3)#define col0 PDout(4)#define col1 PDout(5)#define col2 PDout(6)#define col3 PDout(7)/*¿ª·¢°å 4x4¾ØÕó¼üÅÌ PD4 PD5 PD6 PD7PD0 1 2 3 4PD1 5 6 7 8PD2 9 10 11 12PD3 13 14 15 16*/extern void Rect_key_Init(void);extern u16 Read_one_key_value(void);extern void Read_more_key_value(void);#endif
#include "Rect_key.h"static u8 key_output[4]={GPIO_Pin_0,GPIO_Pin_1,GPIO_Pin_2,GPIO_Pin_3};static u8 key_input[4]={GPIO_Pin_4,GPIO_Pin_5,GPIO_Pin_6,GPIO_Pin_7};u16 keyvalue[4][4];void Rect_key_Init() { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOD, &GPIO_InitStructure); GPIO_SetBits(GPIOD,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; // GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_Init(GPIOD, &GPIO_InitStructure); }u16 Read_one_key_value(void){ u16 row,col,temp; u16 KeyValue = 0; if((GPIO_ReadInputData(GPIOD) | 0x000f) != 0x000f) { delay_ms(10); if((GPIO_ReadInputData(GPIOD) | 0x000f) != 0x000f) { GPIO_SetBits(GPIOD,GPIO_Pin_0); GPIO_ResetBits(GPIOD,GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 ); row = GPIOD->IDR & 0x000f; col = GPIOD->IDR & 0x00f0; switch(row | col) { case 0x0011:KeyValue = http://www.mamicode.com/1; break; case 0x0021:KeyValue = http://www.mamicode.com/2; break; case 0x0041:KeyValue = http://www.mamicode.com/3; break; case 0x0081:KeyValue = http://www.mamicode.com/4; break; default: break; } GPIO_SetBits(GPIOD,GPIO_Pin_1); GPIO_ResetBits(GPIOD,GPIO_Pin_0 | GPIO_Pin_2 | GPIO_Pin_3 ); row = GPIOD->IDR & 0x000f; col = GPIOD->IDR & 0x00f0; switch(row | col) { case 0x0012:KeyValue = http://www.mamicode.com/5; break; case 0x0022:KeyValue = http://www.mamicode.com/6; break; case 0x0042:KeyValue = http://www.mamicode.com/7; break; case 0x0082:KeyValue = http://www.mamicode.com/8; break; default: break; } GPIO_SetBits(GPIOD,GPIO_Pin_2); GPIO_ResetBits(GPIOD,GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_3 ); row = GPIOD->IDR & 0x000f; col = GPIOD->IDR & 0x00f0; switch(row | col) { case 0x0014:KeyValue = http://www.mamicode.com/9; break; case 0x0024:KeyValue = http://www.mamicode.com/10; break; case 0x0044:KeyValue = http://www.mamicode.com/11; break; case 0x0084:KeyValue = http://www.mamicode.com/12; break; default: break; } GPIO_SetBits(GPIOD,GPIO_Pin_3); GPIO_ResetBits(GPIOD,GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 ); row = GPIOD->IDR & 0x000f; col = GPIOD->IDR & 0x00f0; switch(row | col) { case 0x0018:KeyValue = http://www.mamicode.com/13; break; case 0x0028:KeyValue = http://www.mamicode.com/14; break; case 0x0048:KeyValue = http://www.mamicode.com/15; break; case 0x0088:KeyValue = http://www.mamicode.com/16; break; default: break; } return KeyValue; } } else return KeyValue;}void Read_more_key_value(void){ u8 i,j; for(i = 0; i < 4; i++) { GPIO_ResetBits(GPIOD,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3); GPIO_SetBits(GPIOD, key_output[i]); for(j = 0; j < 4; j++) { if(GPIO_ReadInputDataBit(GPIOD, key_input[j]) == 1) keyvalue[i][j] = i*4+(j+1); else keyvalue[i][j] = 0; } lcd_6x8_num(10,4,keyvalue[0][0]); lcd_6x8_num(30,4,keyvalue[0][1]); lcd_6x8_num(50,4,keyvalue[0][2]); lcd_6x8_num(70,4,keyvalue[0][3]); lcd_6x8_num(10,5,keyvalue[1][0]); lcd_6x8_num(30,5,keyvalue[1][1]); lcd_6x8_num(50,5,keyvalue[1][2]); lcd_6x8_num(70,5,keyvalue[1][3]); lcd_6x8_num(10,6,keyvalue[2][0]); lcd_6x8_num(30,6,keyvalue[2][1]); lcd_6x8_num(50,6,keyvalue[2][2]); lcd_6x8_num(70,6,keyvalue[2][3]); lcd_6x8_num(10,7,keyvalue[3][0]); lcd_6x8_num(30,7,keyvalue[3][1]); lcd_6x8_num(50,7,keyvalue[3][2]); lcd_6x8_num(70,7,keyvalue[3][3]); GPIO_SetBits(GPIOD, key_output[i]); } }
其他函数可在STM32库中找。
显示效果图：
STM32 4x4矩阵键盘
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