ChibiOS Free Embedded RTOS

i was thinking callback was just a better way to handle ISR. (like the ISR was directly calling that function)
this mean i'm not resticted to "I-Class system APIs"?

are they execute in a "special thread" or what?

i can't find documentation on this, maybe i'm looking at the wrong things, or i have to look at the code?

Callbacks are always called from ISR context.

Giovanni

ok thanks, this mean only I-class system api can be used right?

correct