Interupt driven servo PWM output

[HenrikOlsson]

Hi,
OK, so you're running at 64MHz, that gives it bit more time but I still think that interrupting at 4us intervals is way to fast, there's only 64 instruction cycles between each interrupt and I think it takes more than that for the DT-Ints system just to save and later restore the system variables. And, even if it does work the code would spend most of its time in transit to and from the interrupt handler.

/Henrik.

[LettyLocke]

The time between transit and interrupt handler is the main culprit here in your servo pulse width modulation. Sometimes the turn around time makes us wait more and it doesn't work in the end even though everything seems right. Happens with me all the time. Connected a lipo battery once as a power supply and it never worked because of misconfiguration.
Good luck to you.

[LettyLocke]

The time between transit and interrupt handler is the main culprit here in your servo pulse width modulation. Sometimes the turn around time makes us wait more and it doesn't work in the end even though everything seems right. Happens with me all the time. Connected a lipo battery once as a power supply and it never worked because of misconfiguration.
Good luck to you.

No more updates regrading the issue? I think the interval time of interrupts must be increased in order for it to work. Interrupt handlers are very tricky to work with.

[Acetronics2]

some pointers ???

http://www.mikroe.com/forum/viewtopic.php?f=10&t=7081

Alain