• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 508 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TM4C1294NCPDT: TIVA C DMA-Controller Channel-Assignment Encoding

Ali Naseri
Prodigy 180 points
Part Number: TM4C1294NCPDT

I want to use the functionality of DMA-Controller to transfer data from the UART-FIFO to another memory location.

The Problem is the channel assigment of the DMA-Controller to the peripherals.

I want to use the UART2 and UART4 peripheral the same time, because it is given on a board which can't be modified.

But there is no possibility beside the re-initialization of the DMA-Controller with another channel-assignment encoding.

So I am here to be inspired how to use UART2 and UART4 in DMA-Mode simultanously.

I could be also an idea like, say, to link or remap the UART4-FIFO to another peripheral, which can be used in FIFO-Mode together with the UART2 peripheral in the same channel assignent encoding.

with regards

Ali Naseri, Germany

  • 0
    TI__Guru**** 191886 points

    Hi,

      Did you have a chance to run the TivaWare uDMA example? You need to use the uDMAChannelAssign() to assign UART3 and UART4 to the channels. For example you will use uDMAChannelAssign(UDMA_CH0_UART2RX) and uDMAChannelAssign(UDMA_CH18_UART4RX) to assign UART2RX to channel 0 and UART4RX to channel 18. Please refer to the datasheet to find out what peripherals are available on what channels.