AnsweredAssumed Answered

UART reception DMA issue

Question asked by mercaldi.michele on Sep 22, 2015
Hi,
Im using an STM32F071RB.
I configured USART to receive data in DMA.
I often get reception stuck but I cant understand why.
I had a look at the registers:
       
  • USART1->CR3 looses DMAR bit (0x00001040 becomes 0x00001000)
  •    
  • USART1->ISR has RXNE bit stuck at 1
  •    
  • DMA1->ISR goes to 0 (from 0x00000700)

Is it OVERRUN error? It looks disabled because USART_CR3_OVRDIS is 1.

What should I search for?

Thanks,
M.
 

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