shumaguan.zip_shumaguan

#include <reg51.h> #include <intrins.h> unsigned char data dis_digit; unsigned char code dis_code[11]={0xc0,0xf9,0xa4,0xb0, // 0, 1, 2, 3 0x99,0x92,0x82,0xf8,0x80,0x90, 0xff};// 4, 5, 6, 7, 8, 9, off unsigned char data dis_buf[8]; unsigned char data dis_index; void main() { P0 = 0xff; P2 = 0xff; TMOD = 0x01; TH0 = 0xFC; TL0 = 0x17; IE = 0x82; dis_buf[0] = dis_code[0x1]; dis_buf[1] = dis_code[0x2]; dis_buf[2] = dis_code[0x3]; dis_buf[3] = dis_code[0x4]; dis_buf[4] = dis_code[0x5]; dis_buf[5] = dis_code[0x6]; dis_buf[6] = dis_code[0x7]; dis_buf[7] = dis_code[0x8]; dis_digit = 0xfe; dis_index = 0; TR0 = 1; while(1); } void timer0() interrupt 1 // 定时器0中断服务程序, 用于数码管的动态扫描 // dis_index --- 显示索引, 用于标识当前显示的数码管和缓冲区的偏移量 // dis_digit --- 位选通值, 传送到P2口用于选通当前数码管的数值, 如等于0xfe时, // 选通P2.0口数码管 // dis_buf --- 显于缓冲区基地址 { TH0 = 0xFC; TL0 = 0x17; P2 = 0xff; // 先关闭所有数码管 P0 = dis_buf[dis_index]; // 显示代码传送到P0口 P2 = dis_digit; // dis_digit = _crol_(dis_digit,1); // 位选通值左移, 下次中断时选通下一位数码管 dis_index++; // dis_index &= 0x07; // 8个数码管全部扫描完一遍之后，再回到第一个开始下一次扫描 }