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使用gd32为mcu,i2s+i2c接口,硬件如下图,测试时,mcu不做数据处理,mic采集到的数据直接给codec输出,采样率8k,现象:输入500hz,输出端是500hz,现象正常,但输入不是500hz的倍数时,输出的波形有变异,具体看下图,输入600hz,中间有一个波形不对,IC的各个时钟都正常,mck2.04Mhz,ck512hz,ws8khz。麻烦帮忙分析一下故障原因,谢谢!