RTOS/MSP432P401R: SPI Communication Length Problem

Joonbum Kim45

Intellectual 310 points

Part Number: MSP432P401R

Tool/software: TI-RTOS

I'm using MSP432, Code Composer Studio & TI-RTOS.

I have succeeded in communicating with the chip via SPI.

However, I have a length problem.

I can SPI_transfer count until 9.

If the count is 10 or more, communication is not possible (response is abnormal).

testTxBuffer[0] = 0x30;
masterTransaction.count = 10;
masterTransaction.txBuf = (void *)testTxBuffer;
masterTransaction.rxBuf = (void *)testRxBuffer;

Am I doing something wrong?

over 6 years ago

0 Sai Reddy over 6 years ago

TI__Mastermind 22580 points

Hello Joonbum,

Are you using SPI as a master? If yes then please refer the spimaster example in the folder "./examples/rtos/MSP_EXP432P401R/drivers/spimaster" of the SimpleLink MSP432P4 SDK. This example seems to be transferring 30 bytes.

Thanks,

Sai

0 Joonbum Kim45 over 6 years ago in reply to Sai Reddy

Intellectual 310 points

Yes. I'm using as a master.

I also know spimaster, and I refer to that code.

In spimaster, more than 10 bytes are transmitted. However, my code is not in it because I was frustrated and asked.

I will test it further.

**Attention** This is a public forum

MSP low-power microcontrollers

MSP low-power microcontroller forum

RTOS/MSP432P401R: SPI Communication Length Problem