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RTOS/MSP432P4111: MSP432P4111

user5724612
Intellectual 340 points

Part Number: MSP432P4111

Tool/software: TI-RTOS

Good morning, 

I'm trying to implement a SPI communication between 2 devices. Both of them have the same cpu, a MSP432P4111.

I've been able to make them communicate using the examples spimaster_MSP_EXP432P4111_tirtos_ccs and spislave_MSP_EXP432P4111_tirtos_ccs. The problema I'm having is that when I change the pins I'm using the communication fails (it gets stuck in this fubcion:         transferOK = SPI_transfer(masterSpi, &transaction);

This is the only thing I have changed:

{
        .baseAddr = EUSCI_A3_BASE,
        .bitOrder = EUSCI_A_SPI_MSB_FIRST,
        .clockSource = EUSCI_A_SPI_CLOCKSOURCE_SMCLK,
        .defaultTxBufValue = 0xFF,
        .dmaIntNum = INT_DMA_INT3,
        .intPriority = (~0),
        .rxDMAChannelIndex = DMA_CH7_EUSCIA3RX,
        .txDMAChannelIndex = DMA_CH6_EUSCIA3TX,
        .clkPin  = SPIMSP432DMA_P9_5_UCA3CLK,
        .simoPin = SPIMSP432DMA_P9_7_UCA3SIMO,
        .somiPin = SPIMSP432DMA_P9_6_UCA3SOMI,
        .stePin  = SPIMSP432DMA_P2_3_UCA1STE,
        .pinMode  = EUSCI_SPI_4PIN_UCxSTE_ACTIVE_LOW,
        .minDmaTransferSize = 10
    }

I have chosen the pins 9.5 9.6 and 9.7 to be the SPI wires.

What's wrong? Any clue?

Thank you.

  • 0
    TI__Mastermind 43275 points

    Hey user,

    In spimaster.c, Board_SPI_Master (defined as MSP_EXP432P4111_SPIB3 in Board.h) is used to open SPI as the master, so this must be modified.

    The code that you shared is found in MSP_EXP432P4111.c's DMA HW attributes const. Let's say you modified the third item, from A1 to A3. With this in mind, what you also want to do is update

    const SPI_Config SPI_config[MSP_EXP432P4111_SPICOUNT]

    This is right below the DMA HW attributes const. Replace the third item with MSP_EXP432P4111_SPIA3.

    Then open MSP_EXP432P4111.h, and make sure that the 3rd item in

    typedef enum MSP_EXP432P4111_SPIName

    is MSP_EXP432P4111_SPIA3.

    So to initialize your pins to use the device's peripherals, ensure that you're modifying MSP_EXP432P4111.h, MSP_EXP432P4111.c, and Board.h together this way.

    BR,

    Seong

  • 0 in reply to Seong Kim
    Intellectual 340 points

    With your help and some other modifications of the code I have maneged to make the SPI work. I still much to do to finish my Project but your help has been extremely important.

    Thank you very much.

  • 0 in reply to user5724612
    TI__Mastermind 43275 points
    Glad you got it to work. I'll be closing this thread. Please start a new post for any other queries.

    Thanks,
    Seong

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