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AFE4300 时钟源问题 以及SPI通信问题

Other Parts Discussed in Thread: AFE4300

AFE4300 我用STM32产生的1Mhz PWM波作为时钟信号,波形较差,然后代码参考CSDN的一位博主的,当我读取校准电阻时,通过串口发送至电脑串口读取时,都是0,不知是何原因,寄存器的配置检查多次,是没问题的,只能考虑是时钟波形太差出现SPI通信、激励的问题,或者是ADC没有启动?请问大家有指导改进的建议吗?