key_disp.rar_8279_disp8279_key-dISP_key_disp

#include <reg52.h> #include <absacc.h> #define COM XBYTE[0x3FFF] /*命令/状态口 */ #define DAT XBYTE[0x3FFE] /*数据口 */ #define uchar unsigned char #define uint unsigned int sbit DOG=P3^5; //看门狗脉冲 uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d, 0x07,0x7f,0xcf}; void delay(uint); //延时 x*50MS uchar TransKey(uchar keyboard); void disp_6same_LED(uchar); void disp_123456(void); void main() { IE=0X81; // 允许 INT0 中断 TCON=0x01; //设INT0为负边缘出发 COM=0xd1; /*总清除命令 */ delay(4); //延时10ms COM=0x00; /*显示方式:8个,左输入; 键盘方式：外部译码键扫描方式，双键互锁；*/ COM=0x34; /* 时钟分频:20分频 */ while(1) { DOG=!DOG; } } void key_disp(void) interrupt 0 { uchar k,i; COM=0X40; //发送读FIFO命令 k=DAT; //读键码 i=k; k=k&0x40; if(k!=0) //判断是否为 SHIFT 键 { disp_123456(); } else //否则为数字键 { i=i&0x3f; i=TransKey(i); //转换键码->实际数码 disp_6same_LED(i); } } void delay(uint x) //延时X*5ms { int i,j; for(i=0;i<x;i++) for(j=1;j<=600;j++); } void disp_6same_LED(uchar x) { uchar i; COM=0x90; //写显示命令 for(i=0;i<8;i++) { DAT=table[x]; } } void disp_123456(void) { uchar i; COM=0x90; //写显示命令 for(i=0;i<8;i++) { DAT=table[i+1]; } } uchar TransKey(uchar keyboard) { uchar key; switch(keyboard) /*代码转化*/ { case 0x00: key=0; break; case 0x01: key=1; break; case 0x02: key=2; break; case 0x03: key=3; break; case 0x04: key=4; break; case 0x05: key=5; break; case 0x06: key=6; break; case 0x07: key=7; break; case 0x08: key=8; break; case 0x09: key=9; break; default: break; } return (key); }