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Connect DMA channel to TIM3_TRIG request

Question asked by Noname.Sergey on Mar 21, 2016
Latest reply on Mar 21, 2016 by waclawek.jan
I am playing with STM32F030 device.  Accordingly to "DMA request mapping" table (RM0091),  it should be possible to use DMA1_Channel4 for TIM3_TRIG request, but I have some doubt how to do it in the right way.
What I am trying, but without success:
// Using "Update" event as a TIM3 trigger output
TIM_SelectOutputTrigger(TIM3, TIM_TRGOSource_Update); 
// Setting TIM_DMA_Trigger as DMA source 

I believe the other timer and DMA initialisation is correct. I was able to use DMA1_Channel3 with TIM3_UP request - it works as expected. Now I want to use DMA1_Channel4 because I need two DMA channels working upon TIM3 Update event.