ChibiOS Free Embedded RTOS

Hinthanks for this detailed answer, polled delay function you mean the oroginal funcion of arduino like delaymicroseconds() ??

what do you mean by polled delay function ??.

jonesrayan wrote:Hinthanks for this detailed answer, polled delay function you mean the oroginal funcion of arduino like delaymicroseconds() ??

yes

And it does'nt effect the performance of chibios ?? if i put a delaymicroseconds() in a thead ?.
i need those information because i"m building a quadcopter so i have to know what danger and what's safe

Of course it does affect the performance, that function wastes time into a loop. Your other option is to use hardware timers to generate those output signals.

You would be served better by an MCU with hardware PWMs.

Giovanni