AM2432: How to fix UART echo DMA timeout issue

ShengYi Lin

Prodigy 150 points

Part Number: AM2432

hi Sir

As below picture the "trans.timeout" is set to 20000.

After timeout is occure, UART_read() is fail .

After timeout is occure, UART_read() is fail in " trans->status = UART_TRANSFER_STATUS_ERROR_INUSE".

The "UART_init()" , "UART_Transaction_init()" and "UART_readCancel()" API is execute after UART_read() is fail.

But it is not useful.

How do I fix this issue?

Sheng Yi

over 2 years ago

0 Erik Friedel over 2 years ago

TI__Expert 7075 points

Hello Sheng,

I am contacting a software expert on this topic. We will get back to you with a response as soon as possible.

Regards,

Erik

0 Frank Livingston over 2 years ago

TI__Mastermind 29518 points

Hi Sheng,

What SDK version are you using? What board are you using?

Are you using this example? https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/08_04_00_17/exports/docs/api_guide_am243x/EXAMPLES_DRIVERS_UART_ECHO_DMA.html

I don't see usage of the read transaction timeout parameter in this example. Did you add the timeout to the example? If so, is that the only modification you made, or were there others?

I added the transaction read timeout to the example code. Next, I executed the FreeRTOS and No RTOS versions on an AM243x EVM. In both cases, I wasn't able to observe the issue you describe.

Regards,
Frank

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AM2432: How to fix UART echo DMA timeout issue