Multitasking

[Guest]

I've got this code but right now it runs in a loop.
How can I run this in the background and also do something else?
What I want todo is put this in the background, and have the count var updated every 1s then print out the count in a non-background process.

setup_timer_0 (RTCC_DIV_1|RTCC_EXT_L_TO_H);
while(true()) {
set_timer0(0);
output_high(PIN_A2);
delay_ms(1000);
output_low(PIN_A2);
count=get_timer0();
printf("Pulses: %lu \n\r",count);
}

[newguy]

In general you're going to have to use a timer interrupt to do what you want. The idea is to set up a timer to "go off" at the interval you want (1 second), and use that event to signal that something needs to happen.

Here's a blurb regarding timers: http://www.ccsinfo.com/forum/viewtopic.php?t=22467

By the way, in your short code snippet you posted, you're not going to see pin A2 go low for very long. If A2 is hooked up to a LED, you'll need to add another delay_ms(1000) after setting A2 low.

[acidice333]

Thank you.

I added a timer2 and just made it printf so I could see it go every 1? second and it does but Im not sure if its exact or not.

I didnt bother putting that little bit of code in the timer2 yet, I just left it as is. It seemed to delay the original code a little compared to when I turned it off.

[acidice333]

Ok well I have a problem.

This code works fine on my 16f648A, but fails to work on the 16F917.

The timer2 works, but it sends gibberish to my terminal plus all the proper text. If I use timer1 instead, it works fine. What is the problem?