28335用外部中断触发,外部信号的频率是200HZ,但是,根据时钟计算,发现中断一直在触发,触发频率不是200HZ,
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28335用外部中断触发,外部信号的频率是200HZ,但是,根据时钟计算,发现中断一直在触发,触发频率不是200HZ,
找到了问题,触发频率没问题,我在线仿真时,因为两个系统时钟不一致,运行的时候,我点一次,dsp只运行了几个时钟周期,但是中断中断源已经来了好多次。也就是说两个中断间隔是现实时间,但是dsp是根据自己的时钟计算的,之后,检查10次触发中断的时间,发现基本正确,