LAUNCHXL-CC1310: SPI 发送与接收COUNT 会影响CS的波形

当COUNT数小于等于9时，CS信号会在每一个字节后拉高；大于9时，CS信号会在整个周期拉低，结束后拉高。

count=9：

          SPI_init();  // Initialize the SPI driver
      GPIO_init();

      GPIO_setConfig(Board_SPI_SLAVE_READY, GPIO_CFG_IN_PD | GPIO_CFG_IN_INT_RISING);



      /* install Button callback */
      GPIO_setCallback(Board_SPI_SLAVE_READY, gpioButtonFxn0);

      /* Enable interrupts */
      GPIO_enableInt(Board_SPI_SLAVE_READY);

      SPI_Params_init(&spiParams);  // Initialize SPI parameters
      spiParams.transferMode = SPI_MODE_BLOCKING;  //
      spiParams.dataSize = 8;       // 8-bit data size
      spiParams.mode = SPI_MASTER;  //SPI MASTER
      spiParams.frameFormat = SPI_POL0_PHA1;  //SPI POL0 PHA0
      spiParams.bitRate = 4000000;  //4MHZ

      spi = SPI_open(Board_SPI0, &spiParams);
      if (spi == NULL) {
          while (1);  // SPI_open() failed
      }


    
     while(1)
     {
         spiTransaction.count = 9;
         spiTransaction.txBuf = (void *)transmitBuffer;
         spiTransaction.rxBuf = (void *)receiveBuffer1;
         SPI_transfer(spi,&spiTransaction);
         sleep(1);
         }

count=10:

          SPI_init();  // Initialize the SPI driver
      GPIO_init();

      GPIO_setConfig(Board_SPI_SLAVE_READY, GPIO_CFG_IN_PD | GPIO_CFG_IN_INT_RISING);



      /* install Button callback */
      GPIO_setCallback(Board_SPI_SLAVE_READY, gpioButtonFxn0);

      /* Enable interrupts */
      GPIO_enableInt(Board_SPI_SLAVE_READY);

      SPI_Params_init(&spiParams);  // Initialize SPI parameters
      spiParams.transferMode = SPI_MODE_BLOCKING;  //
      spiParams.dataSize = 8;       // 8-bit data size
      spiParams.mode = SPI_MASTER;  //SPI MASTER
      spiParams.frameFormat = SPI_POL0_PHA1;  //SPI POL0 PHA0
      spiParams.bitRate = 4000000;  //4MHZ

      spi = SPI_open(Board_SPI0, &spiParams);
      if (spi == NULL) {
          while (1);  // SPI_open() failed
      }


    
     while(1)
     {
         spiTransaction.count = 10;
         spiTransaction.txBuf = (void *)transmitBuffer;
         spiTransaction.rxBuf = (void *)receiveBuffer1;
         SPI_transfer(spi,&spiTransaction);
         sleep(1);
         }