帮忙做一个51单片机89C52的程序,要求。。。
没有规定用什么语言?
追问上面已经说了C语言
追答#include<reg51.h>
sbit key = P2^7;
sbit led = P2^0;
unsigned char n = 0;
void delay()
{
unsigned int i, j;
for(i = 0; i < 100; i++)
for(j = 0; j < 200; j++);
}
void readkey(void)
{
unsigned char i, j;
if(!key) {
for(i = 0; i < 10; i++) //延时
for(j = 0; j < 120; j++);
if(!key) { //消抖
while(!key); //等待按键释放
n++;
n %= 4; //n = 0~3
P1 = n; //显示n
}
}
}
main()
{
while(1) {
switch(n) {
case 3: delay(); readkey(); //慢速闪烁
case 2: delay(); readkey();
case 1: delay(); readkey();
case 0: delay(); readkey(); //快速闪烁
led = ~led;
}
}
}