• TI Thinks Resolved

RTOS/IWR1443: Transferring more than 16 bytes of data as SPI slave

Part Number: IWR1443

Tool/software: TI-RTOS

Hi, 

I am trying to implement a SPI slave to read the object data out of the MMWave demo on the IWR1443BOOST to control it from an MSP430.

I am able to start the radar unit but when I try to read more than 16 bytes of data (set with the define on line 18). I get a Data Abort exception as shown.

Does the SPI driver not support sending more than 16 bytes at a time? If it does, what is missing from my configuration that is causing this to occur.

All of the memcpy and the buffer sizes are based off the SPI_DATA_OBJ_SIZE define so it should not be running out of space anywhere.

The overhead of having to task switch and call the SPI_transfer function repeatedly will not be able to give me the data rates I need to talk to multiple IWR1443s on a single SPI bus.

I have also seen an Invalid_operation exception show up once instead of the Data Abort exception.

Thanks, 

Kevin

  • Hi Kevin,

    Please see the mmWave SDK SPI driver unit-tests in the C:\ti\mmwave_sdk_01_02_00_05\packages\ti\drivers\spi\test directory for examples of SPI slave mode throughput testing using the SPI driver.

    Please mark as answered if your question is resolved or reply if more support is needed.

    Regards,
    John