MSP432P401R: MSP432P401R

Jayden Hewer

Part Number: MSP432P401R

Hello,

I am using a MSP432P401R and a CC2564 to form a bidirectional SPP <-> UART bridge. For the HCI UART I am using the provided HAL (baud rate 2000000) and for the Host UART I am running at 921600 and have implemented hardware flow control and DMA on the receive path.

I developed a stress test that sends messages in both directions. During the running off my stress test, I am getting very occasional (less than once per hour) CRC errors in the SPP->UART direction. What could be causing this issue? Is it possible the issue is with the CC2564?

over 2 years ago

0 Allen Gao over 2 years ago

TI__Expert 7080 points

Hi Jayden,

The error code might caused by the accuracy of clock. You could check the communication waveform of host and slave to see the deviation.

You could also try to decrease the baud rate to test the CRC error.

0 Jayden Hewer over 2 years ago

Prodigy 20 points

Thanks Allen,

Are you referring to the host UART or the HCI UART when you mentioned decreasing the baud rate?

I inspected the data being send from SPP -> UART and found that the messages that failed the CRC check have 1 or 2 octets out of 512 that are incorrect (not the expected value).

0 Allen Gao over 2 years ago in reply to Jayden Hewer

TI__Expert 7080 points

Hi Jayden,

Maybe it happen in CC2564. You could try to decrease the baud rate of it.

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MSP432P401R: MSP432P401R