CC1310: spi slave 只能接受一个字节

您好，

我们也不清楚发生了什么当未看到任何关于主代码或从代码其余部分的内容时。

但是，我们已经修改了 SDK 中的主和从 spi 示例，以使用阻塞模式每 2 秒传输一次 3 字节长的数据包。未使用握手。

代码按预期工作，每次迭代时，从机都会收到所有 3 个字节。

代码如下：

Master:

#define SPI_MSG_LENGTH  (3)
#define MASTER_MSG      ("ABC")

unsigned char masterRxBuffer[SPI_MSG_LENGTH];
unsigned char masterTxBuffer[SPI_MSG_LENGTH];

void *masterThread(void *arg0)
{
    SPI_Handle      masterSpi;
    SPI_Params      spiParams;
    SPI_Transaction transaction;

    // Open SPI as master (default)
    SPI_Params_init(&spiParams);
    spiParams.frameFormat = SPI_POL0_PHA0;
    spiParams.bitRate = 1000000;
    spiParams.transferMode = SPI_MODE_BLOCKING;
    masterSpi = SPI_open(Board_SPI_MASTER, &spiParams);
    if (masterSpi == NULL)
    {
        while (1);
    }

    // Copy message to transmit buffer
    strncpy((char *) masterTxBuffer, MASTER_MSG, SPI_MSG_LENGTH);

    transaction.count = SPI_MSG_LENGTH;
    transaction.txBuf = (void *) masterTxBuffer;
    transaction.rxBuf = (void *) masterRxBuffer;

    while (1)
    {
        SPI_transfer(masterSpi, &transaction);
        sleep(2);
    }
}

Slave:

#define SPI_MSG_LENGTH  (3)
#define SLAVE_MSG       ("DEF")

unsigned char slaveRxBuffer[SPI_MSG_LENGTH];
unsigned char slaveTxBuffer[SPI_MSG_LENGTH];

void *slaveThread(void *arg0)
{
    SPI_Handle      slaveSpi;
    SPI_Params      spiParams;
    SPI_Transaction transaction;

    SPI_Params_init(&spiParams);
    spiParams.frameFormat = SPI_POL0_PHA0;
    spiParams.mode = SPI_SLAVE;
    spiParams.bitRate = 1000000;
    spiParams.transferMode = SPI_MODE_BLOCKING;
    slaveSpi = SPI_open(Board_SPI_SLAVE, &spiParams);
    if (slaveSpi == NULL)
    {
        while (1);
    }

    // Copy message to transmit buffer
    strncpy((char *) slaveTxBuffer, SLAVE_MSG, SPI_MSG_LENGTH);

    transaction.count = SPI_MSG_LENGTH;
    transaction.txBuf = (void *) slaveTxBuffer;
    transaction.rxBuf = (void *) slaveRxBuffer;

    while(1)
    {
        SPI_transfer(slaveSpi, &transaction);
    }
}