Examples of DMA based UART_1 on MPC5744P - Do not provide examples of UART_0

[meedandeys]

Hello Folks,

I am trying to configure my DMA on LINFLEX/UART_1. I am running into some issues. Any directions on this would be helpful.

I am having trouble configuring my DMA_MUX_1 (which controls the LINFLEX_1 TX/RX source channels).

P.S: I have referred several examples of DMA for UART_0, i believe i have my configurations similar to these examples. Wondering if anyone tried configuring the DMA for UART_1 (since DMA_MUX_1 is to be configured) ?

Thanks,

[meedandeys · Accepted solution]

MPC5744P has two DMA_MUX Channels (DMA_MUX_0 and DMA_MUX_1). The DMA Channels 0-15 are associated/mapped to DMA_MUX_0 and channels 16-31 are associated with DMA_MUX_1). I set up the TCDs from channels 16-31 for UART Rx/Tx and now my DMA/UART is working correctly.