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隨便寫的,下載到板子上試了試沒(méi)問(wèn)題,1分鐘 5分鐘時(shí)間太長(zhǎng),我改成5秒 25秒,你只要改下數(shù)字就行.
#include <reg52.h>
sbit relay = P1^0; //繼電器,0線圈吸合,1線圈斷開(kāi)
sbit key = P1^1; //按鍵,0為按下,1為松開(kāi)
unsigned char key_timer_cnt; //檢測(cè)按鍵計(jì)時(shí)變量
unsigned int relay_timer_cnt; //繼電器吸合斷開(kāi)計(jì)時(shí)變量
unsigned char relay_timer_cnt_min; //繼電器延遲斷開(kāi)計(jì)數(shù)器分鐘,因?yàn)?分鐘,1ms為單位將超過(guò)65535
unsigned char relay_state; //記錄繼電器狀態(tài) 0=未觸發(fā) 1=待吸合 2=待斷開(kāi)
void Init_T0(void) //定時(shí)器中斷初始化,設(shè)置為1ms
{
TMOD = 0x01;
TH0 = 0xfc;
TL0 = 0x18;
EA = 1;
ET0 = 1;
TR0 = 1;
}
void main(void)
{
Init_T0();
relay = 1; //斷開(kāi)繼電器
relay_state = 0; //繼電器處于未觸發(fā)狀態(tài)
while(1)
{
//想實(shí)現(xiàn)其他功能,再這里添加代碼
}
}
void T0_ISR() interrupt 1 //1毫秒
{
TH0 = 0xfc;
TL0 = 0x18;
//***************************待觸發(fā)狀態(tài),需要做的只是判斷按鍵有沒(méi)有按下*******************
if(relay_state == 0) //當(dāng)繼電器處于待觸發(fā)狀態(tài)
{
if(key == 0) //按鍵按下,并且繼電器處于未觸發(fā)狀態(tài)
{
key_timer_cnt++; //按鍵計(jì)時(shí)器自加,用于消抖
if(key_timer_cnt>=5) //按鍵超過(guò)5毫秒
{
key_timer_cnt = 0;
relay_state = 1; //將繼電器設(shè)成待吸合狀態(tài)
}
}else
{
key_timer_cnt = 0;
}
}
//********************待吸合狀態(tài),等計(jì)數(shù)器加滿就行*****************************
if(relay_state == 1)
{
relay_timer_cnt++;
if(relay_timer_cnt>=5000) //將5000改為60000 即為1分鐘
{
relay = 0; //繼電器吸合
relay_state = 2; //吸合后將狀態(tài)轉(zhuǎn)成待斷開(kāi)
relay_timer_cnt = 0;
}
}
//******************待斷開(kāi)狀態(tài),跟待吸合一樣加滿就行*******************************
if(relay_state == 2)
{
relay_timer_cnt++;
if(relay_timer_cnt>=5000) //將5000改為60000即為1分鐘
{
relay_timer_cnt = 0;
relay_timer_cnt_min++; //每60秒加1
if(relay_timer_cnt_min>=5) //當(dāng)分鐘數(shù)等于5
{
relay = 1; //斷開(kāi)繼電器
relay_timer_cnt_min = 0;
relay_timer_cnt = 0;
relay_state = 0; //斷開(kāi)后將繼電器狀態(tài)轉(zhuǎn)換成未觸發(fā)
}
}
}
} |
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學(xué)了這么久，這么簡(jiǎn)單的問(wèn)題還搞不定
