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標(biāo)題:
利用定時(shí)器延時(shí)
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作者:
sayno186
時(shí)間:
2015-2-11 20:56
標(biāo)題:
利用定時(shí)器延時(shí)
#include <reg52.h>
#define DELAY_TIME 120 //時(shí)間設(shè)置 秒 = DELAY_TIME * system_delay(系統(tǒng)時(shí)標(biāo)時(shí)間)
bit b_switch_delay = 0;
unsigned char u_tem = 0;
void switch_delay()
{
if (system_delay)
{
system_delay = 0; //定時(shí)器系統(tǒng)時(shí)標(biāo)清0;
if (u_temp >= DELAY_TIME)
{
b_switch_delay = 1; //延時(shí)時(shí)間標(biāo)記
}
else
u_temp++;
}
}
//復(fù)位延時(shí)清0
void rst_switch_delay()
{
u_temp = 0; //臨時(shí)計(jì)數(shù)變量清0;
b_switch_delay = 0; //延時(shí)時(shí)間標(biāo)記清0
}
作者:
admin
時(shí)間:
2015-2-11 22:06
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