PSOC 6 SPI DMA

[mrsinger]

I'm doing an DMA  read/write to SPI.  The TX completes fine, but the RX gives me an bus error CY_DMA_INTR_CAUSE_SRC_BUS_ERROR.   But the source is the SPI RX Fifo and the source is set to not increment.

What would cause this error?

[Hari · Accepted solution]

Hi @mrsinger 

Please make sure that the FIFO pointer that is configured as the source address is correct. You can take a look at the SPI DMA code example present in GitHub - https://github.com/Infineon/mtb-example-psoc6-spi-master-dma

For the Rx source, the configuration must be no increment. Also, please ensure that the data transfer width is configured correctly. 

Best regards, 
Hari