语句阻塞运行

请问您现在使用的是哪款芯片？MSP432?

The UCRXIFG interrupt flag is set each time a character is received and loaded into UCxRXBUF. An interrupt request is generated if UCRXIE is set. UCRXIFG and UCRXIE are reset by a Hard Reset or when UCSWRST = 1. UCRXIFG is automatically reset when UCxRXBUF is read.

理论上是可以被打断的，但最好是不要打断SPI中断。所以之前都是在通讯过程中关闭全程中断，然后再打开。

例程内的中断服务程序如下

//******************************************************************************
//
//This is the EUSCI_B0 interrupt vector service routine.
//
//******************************************************************************
void EUSCIB0_IRQHandler(void)
{
    uint32_t status;

    status = SPI_getEnabledInterruptStatus(EUSCI_B0_BASE);
    SPI_clearInterruptFlag(EUSCI_B0_BASE, status);

    if(status & EUSCI_B_SPI_RECEIVE_INTERRUPT)
    {
        /* USCI_B0 TX buffer ready? */
        while (!(SPI_getInterruptStatus(EUSCI_B0_BASE, EUSCI_B_SPI_TRANSMIT_INTERRUPT)));

        /* Transmit data to master */
        SPI_transmitData(EUSCI_B0_BASE, transmitData++);

        //Receive data from master
        receiveData = SPI_receiveData(EUSCI_B0_BASE);
    }
}