This is most probably case of incorrect documentation and the ADC is *not* triggered by TIMx_CCx event, but the TIMx_OCx signal, i.e. the signal which goes to the output pins from the Output stage of given TIMx channel.
This has several ramifications:
- TIMx_CHx Input Capture does not work as a trigger, only Output Compare
- output of given channel must be enabled in TIMx_CCER.CCxE
- in timers which have TIMx_BDTR, this signal follows the rules of bits in this register (i.e. for basic operation TIMx_BDTR.MOE has to be set)
- no related TIMx_CHx pin has to be enabled in the GPIO matrix
- this issue applies to timer-to-timer triggers, too, and maybe also other tim-to-***
- one would expect this to be clearly documented not only in chapters of all peripherals which are "slaves" to these TIM-originated triggers, but also in the Interconnect chapters/Apnootes (the Interconnect chapters are a bad joke generally with severe defficiencies)
ST perpetuates this error (in some STM32 families using "TIMx_CHx" instead of "TIMx_CCx", not making it any better) ever since the first STM32F1. There are numerous threads in this forum, through the years, involving ST insiders.
JW
@Imen DAHMEN
@Vincent Onde
