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ADC trigger on timer update

Question asked by Pabouctsidis.Alex on Aug 27, 2013
Latest reply on Mar 8, 2016 by Clive One
Hello,

I'm currently working on a brushless motor control application and i'm in the process of implementing the current measuring of the three phases. In order to do so, I need to synchronise the ADC sampling with the PWM outputs in order to sample at the center of the PWM outputs (center aligned 2 mode).

Unfortunately cannot find a simple solution. From the datasheet i see that the ADC can be trigger by either the CC1-4 timer interrupts or the TRGO interrupt. However, from what i've read, the interrupt that that the ADC needs to trigger off of is the timer update interrupt (which is not in the list of available ADC triggers external triggers).

Am i understanding this correctly? I was expecting a straightforward solution as this is a common problem in any motor control application, which is one of the mains features of the advanced timers.

Thanks,
Alex

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