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DMA challenge with BIOS PSP

Stig-Helge Larsen
Prodigy 40 points
Other Parts Discussed in Thread: OMAP-L137

Hi,

I have an OMAP-L137 starter kit, DSPBIOS 5.42.00.07, CCS 5.3, OMAPL137 BIOSPSP 01.30.00.06 and EDMA3 LLD 01.11.03.01. I am testing software on OMAP-L137 before use of OMAP-L137-HT.

I have tested SPI0, SPI1, UART0, UART1 and UART2. Everything works fine if the operation mode is INTERRUPT mode (I.e. Spi_OpMode_INTERRUPT for the SPI driver and Uart_OpMode_INTERRUPT for the UART driver). When I change the operation mode for the SPI driver to Spi_OpMode_DMAINTERRUPT, the communication still works fine. But if I change the operation mode to Uart_OpMode_DMAINTERRUPT for the UART driver, the communication stops working (there is no communication) for the UARTs. The UART baudrate is 115200. The edma3init() function is called once.

Is this a known problem?

Have you tested these drivers in DMAINTERRUPT mode? 

How should I continue to solve this? 

Thanks,

Stig-Helge