CC2340R5: uart buf wiped some bytes before write finish

xuefeng.jin

Part Number: CC2340R5

Tool/software:

Hi All,

My require is read data from uart, then add a header, send the new data back. But the data wiped before uart write finish.

My code like bellow

The program run as
read:1234...xxx
after add header:ABC1234...xxx
expected receive:ABC1234...xxx
actually receive:ABC1234.

It lost few bytes. if I run program step by step, this won't happen.

Is there any setup can fix this? Or have to add mutex-lock?

0 Toby over 1 year ago

Hi,

The functionality should work as long as you have proper management of the data buffer.

If it only works in step by step execution, then there is probably some other thread or interrupt which is modifying that buffer.

A mutex could be useful -- can you try and let us know if it works?

Thanks,
Toby

0 xuefeng.jin over 1 year ago in reply to Toby

Hi Toby,

I checked the code, uart write have a semaphore control, it's not a good way to add a mutex lock.

I am still on checking why this write buffer flush.

+1 xuefeng.jin over 1 year ago in reply to xuefeng.jin

Hi Toby,

The default uart write mode is UART2_Mode_CALLBACK, in my case, I change this to UART2_Mode_BLOCKING, then the buffer won't flush before it finish.

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