msp430 spi uart

msp430默认的是没有中断嵌套的。只要您不在中断服务程序里使能总中断，中断服务程序是不会被打断的。

这个不会影响的啊，SPI是独立与内核工作的，内核给他指令去发送或接受，它就独立于内核工作了。定时器产生中断，内核去响应，不会影响SPI的工作的啊

void SDCard_sendFrame(uint8_t *pBuffer, uint16_t size)
{
uint16_t gie = __get_SR_register() & GIE; // Store current GIE state

__disable_interrupt(); // Make this operation atomic

// Clock the actual data transfer and send the bytes. Note that we
// intentionally not read out the receive buffer during frame transmission
// in order to optimize transfer speed, however we need to take care of the
// resulting overrun condition.
while (size--){
while (!(UCB1IFG & UCTXIFG)) ; // Wait while not ready for TX
UCB1TXBUF = *pBuffer++; // Write byte
}
while (UCB1STAT & UCBUSY) ; // Wait for all TX/RX to finish

UCB1RXBUF; // Dummy read to empty RX buffer
// and clear any overrun conditions

__bis_SR_register(gie); // Restore original GIE state
}
这是TI官方 SPI写数据时关闭了中断