AM2634: UART Receiving interrupt issue.

TEMC

Part Number: AM2634
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

This is related to AM2634, I have written a code for UART interrupt (only for reception) with custom ISR which echo backs the given input data at any point of time continuously. Unfortunately, the code is working only for 1st interrupt. After it gets entered into ISR then it was no more getting a reception interrupt. Also, the received data was sent back to THR in while loop, it also not working as it was done after ISR executed. Could you please help me with that.

There is no continuous receiving interrupt in provided examples UART codes in SDK.

over 1 year ago

0 Gunjan Kumari over 1 year ago

TI__Intellectual 2640 points

Hi,

Our expert on UART is OOO, please expect some delay in response.

Thanks,
Gunjan

0 Shaunak Deshpande over 1 year ago

TI__Mastermind 23102 points

Hi TEMC,

Can you please share your CCS project as a zip file? I will be able to understand the code and debug better if I have your project locally.

Regards,
Shaunak

0 Shaunak Deshpande over 1 year ago

TI__Mastermind 23102 points

Hi TEMC,

I assume you are using the SDK example: UART ECHO INTERRUPT LLD. Did you make any changes in the out-of-box example? Can you please share those and explain them as well (including changes in syscfg, if any).

Regards,
Shaunak

0 TEMC over 1 year ago in reply to Shaunak Deshpande

Expert 1005 points

UART_interrupt_without_API.zip

please check the attached project file

0 TEMC over 1 year ago in reply to TEMC

Expert 1005 points

Modified the Baudrate in sysconfig to 921600 and also modified the Rx FIFO trigger. Main intention of that project file is to leave the rx interrupt ready at any instant of time. If a trigger or timeout interrupt occured then it just copies the entire data into a Receive buffer and then transmits.

+1 Shaunak Deshpande over 1 year ago in reply to TEMC

TI__Mastermind 23102 points

Hi TEMC,

Thanks for sharing the project. I need some further help understanding your code. I see you have commented out the TI's example flow/ configuring UART and I do see some steps missing (based on the default code blocks enabled/disabled in the above project).

1. I do not see any intrNum, gUartVimStsClrMask and intcBaseAddr variables being set anywhere, but they are passed to the App_UART_ISR_2 function where we pass it to a IRQ handling function (ISR_CALL_LEVEL_NONFLOAT_REENTRANT).

2. I do not see any HwIP_enableInt (enable interrupt call)

3. Can you please share what is your expectation from this "else" block

Its a bit difficult to understand what is the intention here. Some pointers will be helpful.

I built and executed your example but wasn't able to fill in any data in the Rx FIFO, the readBuf size also was 0. Do I need to change any Macros or run it differently?

Regards,
Shaunak

0 TEMC over 1 year ago in reply to Shaunak Deshpande

Expert 1005 points

Hi Shaunak,

We have tried the method you have suggested, issue is resolved now. Thank you.

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AM2634: UART Receiving interrupt issue.