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timer.h
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timer.h
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#ifndef TIMER_H_INCLUDED
#define TIMER_H_INCLUDED
#endif // TIMER_H_INCLUDED
#include<reg51.h>
sbit imp0 = P3^4;
sbit imp1 = P3^5;
//delay in milliseconds
void delay_ms(int ms){
unsigned int i;
for(i=0;i<ms;i++)
{
TMOD = 0x01;
TH0 = 77;
TR0 =1;
while (TF0 == 0);
TR0 = 0;
}
}
//delay in microseconds
void delay_us(int us){
TMOD = 0x01;
TH0 = (int)(us/12);
TR0 =1;
while (TF0 == 0);
TR0 = 0;
}
//delay in seconds
void delay(int sec){
unsigned int i;
for(i=0;i<sec;i++){
delay_ms(1000);
}
}
//external counter 0
int counter_0(){
imp0 =1;
TR0 = 1;
TL0 = 0;
while(TF0 == 0){
return(TL0);
}
}
//external counter 1
int counter_1(){
imp1 =1;
TR1 = 1;
TL1 = 0;
while(TF1 == 0){
return(TL1);
}
}