I have been thrust into a situation where I realize I am in over my head. Eventually I think I will figure it out but could use a leg up with this STM32F437 device. I know little about it and especially it’s dma.
The project I have been assigned to uses DMA to communicate with the debug port UART8.
The DMAChannel is set to DMA_Channel_5, and from the table transmission for uart 8 is set for stream 0 and rx is stream6.
We are using Micrium uC/OS-III and in the interrupt vector table I see no interrupts setup for the UART but I do see an RxISR and a TxISR. From this should I assume that there is some smart linkage that lets the DMA know there are characters available at the UART.
AT startup the welcome banner is splashed. However when a character is entered to start the login process the system hangs up. Looking at the registers we see a transmit transfer error bit that will not clear.
My co-worker suspects that maybe it is due to dma transmit and receive happening at the same time but the documentation does not prohibit this as far as I know. So could this be a problem?