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source for TIMx UEV

Question asked by naphtali on Oct 28, 2013
Latest reply on Oct 31, 2013 by naphtali

What are the sources for a TIMx update event?

My specific use case is that I am using TIM3 to generate a quadrature encoder output (CC1 and CC2). See the earlier discussion on how to do this: (quadrature output - STM32F407).  I am using an internal trigger to clock TIM1. TIM1 is set up to output a PWM signal based upon its input clock (TIM3). When I set CC1 as the trigger source, the output frequency from TIM1 is what I expect, but when I use the Update Event, it is doubled. This leads me to believe that I am either doing it wrong, and/or more than just the CNT=ARR generates an UEV.

Any thoughts?