RTOS/AM5728: McSPI EDMA issue

raksha dhruna

Part Number: AM5728

Tool/software: TI-RTOS

Hi,

I have downloaded PROCESSOR-SDK-RTOS-AM57X and referring the driver provided for SDK. I am trying to test MCSPI with EDMA, am5728. For that I modified the given mcspiloopbackapp example to enable the dma, initiate the edma driver, get the handle to edma driver, setting the global tx & rx buffer address and initiating the transfer. Still the SPI_transfer is not happening, it goes to the idle_run with semaphone_pend. Tried with blocking and callback mode, same result. (I can successfully run the mcspiloopapp in blocking and callback mode without dma).

Any idea what is wrong ? why is it not working correctly ?

Regards,

Raksha

over 7 years ago

0 Biser Gatchev-XID over 7 years ago

TI__Guru**** 393215 points

The RTOS team have been notified. They will respond here.

0 lding over 7 years ago in reply to Biser Gatchev-XID

TI__Guru* 95265 points

Hi,

To test the MCSPI with EDMA, please follow processors.wiki.ti.com/.../Processor_SDK_RTOS_QSPI-McSPI and refer to MCSPI_Dma_Serializer Example application.

Regards, Eric

0 raksha dhruna over 7 years ago in reply to lding

Intellectual 320 points

Hi,

I am taking McSPI_DMA_serializer as an reference. Following it to the point, with single channel in blocking mode, with dma enabled, goes to idle loop. Tried same with callback mode, same result. I had similar issue with UART_write before, we had to change the default rxTriglvl value. For SPI, I am tracing back the word_count and txtrig & rxtrig val, those looks fine to me. Can you tell what else can be the problem here ?

Regards,

Raksha

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RTOS/AM5728: McSPI EDMA issue