目前正在调试一断程序，需要要到串口接收，发现MSP430F149IPM的接收中断工作不正常，上位机发送了一字节给单片机后，总是会进两次串口接收中断。串口发送是正常的，就是接收不正常，数据是正确的，但是一字节会接收两次，造成不能连续接收数据。波特率115200，8位数据位，其它默认设置，使用8MHz晶振。使能发送和接收，开启了接收中断
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