您好：

        目前我在使用CC1310的SPI   Master模式，需求是SPI MASTER模式下可以一次发送256个字节， 按照API中的例程，可以正常发送Hello World，但是将需要发送的数组赋值为100个字节运行后，发现只能打出前28个字节。

     按照API说明：SPI的TX每次最多可以发送1024个字节：

        Transfer Size Limit

       The UDMA controller only supports data transfers of up to 1024 data frames. A transfer with more than 1024 frames will be transmitted/received in multiple 1024 sized portions until all data has been transmitted/received. A data frame can be 4 to 16 bits in length.

   目前有怀疑是不是超时时间没有设置好？？  

Timeout

Timeout can occur in SPI_MODE_BLOCKING, there's no timeout in SPI_MODE_CALLBACK. When in SPI_MODE_CALLBACK, the transfer must be cancelled by calling SPI_transferCancel().
If a timeout happens in either SPI_SLAVE or SPI_MASTER mode, the receive buffer will contain the bytes received up until the timeout occurred. The SPI transaction status will be set to SPI_TRANSFER_FAILED. The SPI transaction count will be set to the number of bytes sent/received before timeout. The remaining bytes will be flushed from the TX FIFO so that the subsequent transfer can be executed correctly. Note that specifying a timeout prevents the driver from performing a polling transfer when in slave mode.

代码如下：

void *mainThread(void *arg0)
{
    GPIO_init();
    SPI_init();
    uint8_t x;
    SPI_Handle handle;
    SPI_Params params;
    SPI_Transaction transaction;
    uint8_t txBufdata[100];
    uint8_t rxBuf[11];
    SPI_Params_init(&params);
    params.bitRate     = 4000000;
    params.frameFormat = SPI_POL1_PHA1;
    params.mode        = SPI_MASTER;
    transaction.count = sizeof(txBufdata);
    transaction.txBuf = txBufdata;
    transaction.rxBuf = rxBuf;
    handle = SPI_open(Board_SPI_MASTER, &params);
    while(1)
    {
    for(x=0;x<100;x++)
       {
        txBufdata[x]=x;
       }
        SPI_transfer(handle, &transaction);
    }
}

       麻烦您看下或者提供下可用例程，谢谢！