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STM32F4 - DAC start problem, when using ADC

Question asked by smrtkai on Dec 19, 2016
Latest reply on Dec 20, 2016 by smrtkai



I do have some strange behaviour with DAC and ADC on STM32F429I-DISC0. I am using a DAC with DMA. Additionally I use two ADCs in parallel with DMA. Normally it works as expected. But when I have a voltage over 2.5V at one of the ADCs during startup the DAC does not start. Strangely the DAC starts with a voltage of over 2.5V at one of the ADCs but not with the other.


What could be the reason of this behaviour? Do I need to prevent voltages to be higher than 2.5V during startup?


Thanks in advance.