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scan if 测流

现在在用fw427测流量,按照ti推荐的参数和其例程进行,可就是不进中断,怀疑是DAC门限电压的问题,可这个电压到底该怎么设置呢?并且我发现按照官方的算法算出来的那个电压好像有时候不太管用?

硬件是100uh的电感和1nf的电容。软件例程是从TI官方下载的!

附件是震荡测试的波形图!