help with a delay function

i want to make a delay of, say 100uS using 1 Mhz oscilator, so i see a function like this can do the work,

...but my problem is how to figure out how this function really do the delay of, say 1 seconds, etc. when it is called.

anyone to come to my rescue?

thanks,

t.man said:

i want to make a delay of, say 100uS using 1 Mhz oscilator, so i see a function like this can do the work,

Code:

void delay(unsigned char i)
{
	unsigned char n;
	unsigned int j;
	for (n=1; n<i; n++)
	{
		for (j=1; j<1535; j++);
	}

...but my problem is how to figure out how this function really do the delay of, say 1 seconds, etc. when it is called.

anyone to come to my rescue?

thanks,

Click to expand...

hi,
If you are using a PIC with a 1MHz crystal.? the internal cycle execution time will be 1MHz/4 ie: == 4uSec/execution cycle.

I dont program in 'C', but the idea is the same in assembler.
You count the total program execution cycles [bytes] around the loop, this gives the total delay period.

Do this help.?

You can run it in the simulator and use the stop watch to time it. Alternatively, you could include the delay routines supplied by Microchip.

Mike.