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430死掉

Other Parts Discussed in Thread: MSP430F149

使用MSP430F149控制直流电机,同事外部中断采集电机转的圈数,利用串口控制电机正反转,串口命令发送太快,单片机会死掉,必须重新启动才能正常运行,这是怎么回事?程序中用到串口中断,外部中断,定时器2中断,定时器1产生两路PWM波。