CCS: F28M25H52C UART transmit problem

Alexander Valiushko

Tool/software: Code Composer Studio

Hello. I'm use UART F28M25H52C. Baud rate is 921600, transmit FIFO level is 7/8. When I work under JTAG and transmit 15 bytes - all bytes transmit good. But when program loaded in internal FLASH and run from it, some last bytes not transmit. For transmit I'm use UARTCharPutNonBlocking function. 12 bytes transmit OK.

over 7 years ago

0 Cody Watkins over 7 years ago

TI__Mastermind 42195 points

Alexander,
Are you using the SCI module or the UART module of the M3?

Can you connect to the device when it is running from flash and see what state the device is in? Are there any bytes left in the FIFO buffer?

Regards,
Cody

0 Alexander Valiushko over 7 years ago in reply to Cody Watkins

Prodigy 110 points

I'm using UART module of the M3. When running serial port monitor or check data on oscilloscope, there is also absent some last bytes. I whant try change function UARTCharPutNonBlocking() on UARTCharPut() when it will be possible, because I have no access to the device now.

0 Ken Schachter over 7 years ago in reply to Alexander Valiushko

TI__Genius 17315 points

Alexander,

Sometimes when code runs out of RAM without any issues, but there are problems running from flash, a cause can be not explicitly initializing variables. This might be worth checking on. I hope this helps.

- Ken

0 Cody Watkins over 7 years ago in reply to Ken Schachter

TI__Mastermind 42195 points

Alexander,
Can I close this issue?

Regards,
Cody

0 Alexander Valiushko over 7 years ago in reply to Cody Watkins

Prodigy 110 points

Yes, you can.I tried the suggested options, but the problem is not solved.

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CCS: F28M25H52C UART transmit problem