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TMS570 DMA

Serg Polkovnikov
Prodigy 10 points

Hi, guys!

 

I am kinda new at controllers and sorry if my question is stupid.

I've got new TMDX570LS20SUSB ( TMS570 Microcontroller USB Kit ). And I'm reserching DMA. For this purpose I tried to execute some exaples that were in the KIT. There are 2 exaples there: DMA_MPU and DMA_Parity (if you don't know what is it, just ask me and I'll paste code here). I realised that DMA_Parity work with an error on purpose, so I commented the code that causes an error, but neither DMA_MPU nor DMA_Parity examples do not work (no data transfer occurs). If you know, what should I edit in that code to success in DMA transfer, please let me know! 

In fact it would be anough for me to have a simple example of DMA data transfer from one data array to another.

Thanks in advance!

  • 0
    TI__Prodigy 365 points

    Hi Polkovnikov,

    Please check for the following register settings.

    1. Global Control register - Whether DMA Enable bit set or not and also the DMA Debug Mode.

    2. Corresponding Port assignment register - whether it is set to PortB or not ( i.e '0x04' )

    3. DMA pending Register - whether a DMA request has been generated or not. if set then check the DMA Request Assignment Register for DMA Request mapping to DMA channel.

    Please share the source code and also highlight the code which you have commented.

    Regards

    Hari

     

                            

  • 0
    TI__Intellectual 2145 points

    Hi Polkovnikov,

    Hari gave you a good answer. I do a DMA example code as your requirement as below:

    2781.TMS570LS20USB_DMA_DATA.zip

    Hope that this may help you.

    Best Regards,
    Shelford