I’m using CubeIDE and I need to load a single memory location of the FMAC input buffer via DMA with readings from a single ADC channel that is triggered by a timer output compare. DR register on the ADC shows a stuck value indicating conversions aren’t taking place. I’m using the same trigger for other things successfully, but I don’t see any conversions happening. I'm using HAL_ADC_START_DMA + Cube...are there more config steps for trigger mode?
As a possible substitute, I disabled the trigger option and kept continuous mode enabled. I can see a single conversion and DMA transfer take place at startup, but not continuous. I read this can be due to overloading DMA with constant requests, so I set the sample time to 640 clock cycles, but it didn’t change anything. In this state, I can see ADSTART is 0. If I set it to 1, I get another single conversion and a DMA transfer and ADSTART goes back to zero. It looks like this is nearly working...but I'm likely just missing a setting. I was also unsuccessful in getting continuous mode to work even without DMA, so I don’t think that’s the problem. What could I have missed?
