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#define MAIN_C #include "includes.h" /***************************************************/ /*T0工作于计数方式*/ /*计数脉冲从PB0(T0)脚输入*/ /***************************************************/ //数码管字形表 //数码管为公阴极 unsigned char table[10] = { 0x3f, //0 0x06, //1 0x5b, //2 0x4f, //3 0x66, //4 0x6d, //5 0x7d, //6 0x07, //7 0x7f, //8 0x6f //9 }; void display(unsigned char *p) { unsigned char i; unsigned sel = 0x08; for(i=0;i<4;i++) { ConPort = ~sel; OutPort = table[p[i]]; delay_nms(1); sel = sel>>1; } } void main(void) { unsigned char load; InitIo(); PORTA = 0xff; //点亮测试所有数码管 PORTC = 0x00; delay_nms(10); PORTC = 0xff; //熄灭所有数码管 TCCR0 |= (1<<CS02)|(1<<CS01);//T/C0工作于计数方式，下降沿触发 TCNT0 = CNT; //计数初值 while(1) { load = TCNT0; process(load,data); display(data); } }