基于STM32的Protues仿真实例（8051+毕业设计)-8051计数器.zip

///////////////////////////////////////////////// /////加减记数器源程序counter.c ///// ///////////////////////////////////////////////// #include "stdio.h" #include "reg51.h" // 共阳 0 - 9 的编码 12MHz unsigned char code table[] = { 0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xFF }; //第1-- 6 位的片选线 unsigned char code dig[] = { 0x21,0x11,0x09,0x05,0x03,0x08};//= { 0x80,0x03,0x05,0x09,0x11,0x21}; unsigned char buffer[8]; unsigned char scan,i,ch,KeyVal; bit fKey,Key1,Key2,Key3,OldKey1,OldKey2,OldKey3,fBI; unsigned long int counter,tmp; void counter_display(void) { buffer[5]=counter/100000; buffer[4]=counter/10000-buffer[5]*10; buffer[3]=counter/1000 -buffer[5]*100 -buffer[4]*10; buffer[2]=counter/100 -buffer[5]*1000 -buffer[4]*100 -buffer[3]*10; buffer[1]=counter/10 -buffer[5]*10000 -buffer[4]*1000 -buffer[3]*100 -buffer[2]*10; buffer[0]=counter/1 -buffer[5]*100000-buffer[4]*10000-buffer[3]*1000-buffer[2]*100-buffer[1]*10; } void delay(void) { int i; for(i=0;i<500;i++) { ; } } void main(void) { unsigned int i; P3=dig[1]; P1=table[1]; TCON &= 0xCF; // 初始化Timer0 TMOD &= 0xF0; TMOD |= 0x01; TL0 = 0xff; TH0 = 0xff; EA = 1; ET0 = 1; TR0 = 1; counter=0; while(1){ for(i=0;i<1;i++){ delay(); } counter++; } } void timerint () interrupt 1 { unsigned int i,j; unsigned char n; EA=0; counter_display(); for(i=0,n=0;i<=5;i++){ if(buffer[5-i]!=0){ n=5-i; break; } } for(j=0;j<5;j++){ for(i=0;i<=n;i++){ P3=dig[i]; P1=table[buffer[i]]; delay(); } } EA=1; TL0 = -2500%256; TH0 = -2500/256; //2.5ms定时 TR0 = 1; }