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2407通过SPI外接DAC芯片,SPI配置寄存器写不进去



独自一人实验室搞电机,升级了师兄的硬件,但是主控芯片没有动,现在加入SPI的配置,之前没有用SPI。问题是SPI配置寄存器SPICCR、SPIBRR、***.求解?不胜感激