AWR1843: task contains slave SPI receive hangs up if master never sends anything

Ke Li87

Part Number: AWR1843

Hi there,

the AWR1843 is an SPI slave. I am using SPI_transfer to receive messages. If the master stops sending, the task hangs up. Any suggestions to walk around?

Thanks, Ke

over 5 years ago

0 db_woodall over 5 years ago

TI__Mastermind 21025 points

I'm not able to look through the code at the moment, but there should be a blocking and non-blocking driver mode so that the receiver can just check for data and continue.

0 Ke Li87 over 5 years ago in reply to db_woodall

Intellectual 350 points

the SDK manual says only blocking mode supported.

0 Ke Li87 over 5 years ago in reply to Ke Li87

Intellectual 350 points

any updates?

0 db_woodall over 5 years ago in reply to Ke Li87

TI__Mastermind 21025 points

Sorry for the delay - yes, you are correct. Only blocking mode is currently supported. The task will not continue because of the transfer complete semaphore that it is blocked on. Perhaps a simple work-around would be to isolate the SPI_transfer call to a separate task so that it can block without interfering with other tasks that should not be blocked. The SPI task could then either set a flag or use another OS object to indicate a transfer is received.

-dave

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AWR1843: task contains slave SPI receive hangs up if master never sends anything