STM32F401Re issue with ADC

[Valkan Pavlov]

Hey folks.

What I do is this: I get 14 ADC measurements on different channels, than use DMA to store them into an array. When this is ready an interrupt flag is raised, I make a copy of that array and send it via UART. There is a timer to control the ADC. At some point I do transfer back an UART message that I use to update my ARR register of the timer. This set up works from time to time, but most of the time, especially on higher values, DMA that I use with ADC stops rising the interrupt flag, and no new ADC values are produced. Does anyone have similar experience?

THanks!

 

I did try to disable the UART, ADC, and TImer before updating ARR, but to the same result.

[Sarra.S]

Hello @Valkan Pavlov, 

check for overrun in OVR bit in the ADC_SR, read section 11.8.1 in RM0368

[Valkan Pavlov]

Thank you Sarra!