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TMS320F28034: 时钟频率自动分频

Part Number: TMS320F28034
Other Parts Discussed in Thread: C2000WARE

运行时发现有时时钟会发生变化,重新上电能恢复正常。详细描述如下:

SPI连接键盘,键盘正常是12mS,发一次,异常是36mS才发一次,发现是因为时钟信号3分频了,后来发现PWM,485都有3分频现象,导致485无法通信,pwm设定6k现在变成了2k,pwm波形如下:

 正常的

 非正常