S12 / MagniV MicrocontrollersのトピックMonostable type output

Monostable type output

ernestsnaith — Tue, 25 Apr 2006 23:54:12 GMT

I would like to make an output high for X ms, and dont want to have a loop which wastes X amount of time as i need to do plenty within this time.

Is the best way to do this to have a timer interupt or is there a better way?

Thanks

Re: Monostable type output

rocco — Wed, 26 Apr 2006 01:25:07 GMT

Hi, ernestsnaith

It's pretty subjective on what 'a better way' is. Within my simplistic mind, interrupts are always the better way.

But for your application, there is a simpler way.

You can do both ends of a one-shot with the timer, in one routine, without any delays.

You would use a timer channel, and set the output high directly in that routine. You would then program the output-compare function to set the output low at some point in the future, and you're done.

Re: Monostable type output

ernestsnaith — Wed, 26 Apr 2006 15:18:02 GMT

Im finding the manual a little hard work is it roughtly as follows?

put X into output compare reg

reset timer count reg

make ouput high

Then timer toggle on overflow reg changes state once X is reached.

Thanks