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標題: 單片機按鍵響提示器程序 [打印本頁]

作者: 1271791213 時間: 2021-1-4 18:03
標題: 單片機按鍵響提示器程序
按一個按鍵即可使蜂鳴器響起
用于提示報警器
僅供單片機初學者學習

單片機源程序如下:

#include <reg52.h>
sbit LED4 = P1^3;
sbit LED3 = P1^2;
sbit LED2 = P1^1;
sbit LED1 = P1^0;
sbit KEY1 = P3^3;
sbit KEY2 = P3^4;
sbit KEY3 = P3^6;
sbit KEY4 = P3^7;
sbit FM = P0^7;
void main()
{
if (KEY1 == 1)
{
LED1 = 1;
}
else if (KEY1 == 0)
{
LED1 = 0;
}
if (KEY2 == 1)
{
LED2 = 1;
}
else if (KEY2 == 0)
{
LED2 = 0;
}
if (KEY3 == 1)
{
LED3 = 1;
}
else if (KEY3 == 0)
{
LED3 = 0;
}
if (KEY4 == 1)
{
LED4 = 1;
}
else if (KEY4 == 0)
{
LED4 = 0;
}
if (KEY1 == 0&&KEY2 == 0||KEY1 == 0&&KEY3 == 0||KEY1 == 0&&KEY4 == 0||KEY2 == 0&&KEY3 == 0||KEY2 == 0&&KEY4 == 0||KEY3 == 0&&KEY4 == 0)
{
FM = 0;
}
else
{
FM = 1;
}
}

復制代碼

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