Whenever the UART connection becomes unstable while in DMA reception mode, there is a chance that random noise on the line invokes the interrupt handler after receiving 0 bytes. This stops the reception, but the interrupt callback is never called since no data was received, which stalls the UART reception loop.
Whenever the UART connection becomes unstable while in DMA reception mode, there is a chance that random noise on the line invokes the interrupt handler after receiving 0 bytes. This stops the reception, but the interrupt callback is never called since no data was received, which stalls the UART reception loop.