Hello,
I have an STM32G474RE Nucleo board configured in Dual Regular Simultaneous Mode for ADC 3/4 using CubeMX. I noticed some strange behavior with ADC 4, specifically that its conversions freeze after operating for some length of time. I thought I was experiencing a software problem on my end, but after much testing and ordering another board, I believe the issue is inherent to the STM32G474RE. When I configure a simple test for ADC pair 1/2 with DMA, using Dual Regular Simultaneous Mode and triggered by a timer, and separate the resulting conversions into two 16-bit values in the debugging window, no issues arise. But when I repeat the test and only change the ADC pair to ADC 3 (master) and ADC 4 (slave), the conversions from ADC 4 freeze every time after some length of time. I also noticed that any other code makes the problem worse. For example, if I poll SPI Transmit/Receive in the while loop in main, the readings from ADC 4 freeze almost immediately. I even tested a simple "cnt_var++" in the while loop and observed the same behavior.
I have since changed the code for my project to only use ADC pair 1/2 but with multiple channels, and it works fine. But, I wanted to see if anyone else has experienced or reported this problem. Thanks!
