简单的定时器控制LED灯的应用

ID:333172 · 发表于 2018-5-18 18:10

该应用为帮助清晰理解定时器中断的概念；
需要掌握51单片机IO口控制电平输出，以及中断的理论概念和定时器的理论概念。

源程序：
#include "STC15F2K60S2.H"
#define uchar unsigned char
#define uint unsigned int

sbit LED_SEL = P2^3;
sbit LED1 = P0^0;
sbit LED2 = P0^1;
sbit LED3 = P0^2;
sbit LED4 = P0^3;
sbit LED5 = P0^4;
sbit LED6 = P0^5;
sbit LED7 = P0^6;
sbit LED8 = P0^7;

uchar cnt = 0;

void Init(){

P0M1=0x00;
P0M0=0xff;
P2M1=0x00;
P2M0=0x08;

TMOD = 1;
TH0 = (65535 - 10000)/256;
TL0 = (65535 - 10000)%256;
EA = 1;
ET0 = 1;
TR0 = 1;

}

void Timer0() interrupt 1 {
TH0 = (65535 - 10000)/256;
TL0 = (65535 - 10000)%256;
cnt++;
if (cnt == 30){
cnt = 0;
LED1 =~ LED1;
}
}
void main() {
Init();
LED_SEL = 1;
while(1);
}

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