51单片机练习（04）

51单片机练习（04）

eg1:使用定时器的方式实现单片机流水灯

#include <REGX52.H>
#include <INTRINS.H>
#define uchar unsigned char
#define uint unsigned int
uchar temp,t0;// 初始化函数
void init(){temp = 0xfe;//第一个发光二级管点亮P1 = temp;// 初始化定时器TMOD = 0x11;TH0 = (65536-50000)/256;TL0 = (65536-50000)%256;EA = 1;ET0 = 1;// 启动定时器TR0 = 1;
}
// 定时器中断函数
void timer0() interrupt 1 {TH0 = (65536-50000)/256;TL0 = (65536-50000)%256;t0 ++;if(t0 == 10){t0 = 1;temp = _crol_(temp,1);P1 = temp;}
}void main(){// 初始化函数调用init();while(1){}}

代码的截图如下所示
单片机课后作业数码管和流水灯显示

#include <REGX52.H>
#include <INTRINS.H>
#define uchar unsigned char
#define uint unsigned int
uchar temp,t0,t1,bai,shi,ge,flag,flag1;
uint shu;
sbit dula  = P2^6;
sbit wela  = P2^7;	
uchar code table[] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,0x36,0x76,0x38,0x3f,0};// 初始化函数
void init(){shu = 432;temp = 0xfe;//第一个发光二级管点亮P1 = temp;// 初始化定时器TMOD = 0x11;TH0 = (65536-50000)/256;TL0 = (65536-50000)%256;// 初始化定时器1TH1 = (65536-50000)/256;TL1 = (65536-50000)%256;EA = 1;ET0 = 1;// 打开定时器1ET1 = 1;// 启动定时器TR1 = 1;TR0 = 1;
}
// 定时器中断函数
void timer0() interrupt 1 {TH0 = (65536-50000)/256;TL0 = (65536-50000)%256;t0 ++;if(flag != 1){if(t0 == 10){t0 = 1;temp = _crol_(temp,1);P1 = temp;}}else{if(t0%4 == 0){P1 = ~P1;}if(t0 == 60){TR0 = 0;P1 = 0xff;flag1 = 1;}}}// 定时器1的中断函数
void timer1() interrupt 3 {TH1 = (65536-50000)/256;TL1 = (65536-50000)%256;t1 ++;if(t1 == 2){t1 = 0;shu --;// 将我们的bai shi ge 进行分离bai = shu/100;shi = shu%100/10;ge = shu%10;if(shu == 398){TR0 = 0;TH0 = (65536-50000)/256;TL0= (65536-50000)%256;TR0 = 1;flag = 1;t0 = 0;// 关闭led灯P1 = 0xff;TR1 = 0;}}   }
// 延时函数
void delay(uint z){uint x,y;for(x = z; x > 0; x --){for(y = 110; y > 0; y--){}}}// 显示子程序
void display(uchar aa , uchar bb , uchar cc ,uchar bai,uchar shi,uchar ge)
{dula = 1;P0 = table[aa];dula = 0;wela = 1;P0 = 0xfe;wela = 0;delay(5);dula = 1;P0 = table[bb];dula = 0;wela = 1;P0 = 0xfd;wela = 0;delay(5);dula = 1;P0 = table[cc];dula = 0;wela = 1;P0 = 0xfb;wela = 0;delay(5);// -------------||-----------------||----------------||---------------||-------------||---------------------||--------------dula = 1;P0 = table[bai];dula = 0;wela = 1;P0 = 0xf7;wela = 0;delay(5);dula = 1;P0 = table[shi];dula = 0;wela = 1;P0 = 0xef;wela = 0;delay(5);dula = 1;P0 = table[ge];dula = 0;wela = 1;P0 = 0xdf;wela = 0;delay(5);}void main(){// 初始化函数调用init();while(1){// 调用函数并赋值形参if(flag != 1){display(7,6,5,bai,shi,ge);}else{display(16,17,18,18,19,20);}}}