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西门子533-695
533-695确定端口号
单片机的GPIO端口一般由一个字母和一个数字组成,字母代表所在的端口组,数字代表具体的端口号。例如,ATmega328P单片机的PB5口表示Port B端口组的第5个引脚。
设置端口方向
根据需要,将GPIO端口设置为输入或输出。一般情况下,单片机的GPIO口默认为输入,需要通过寄存器设置为输出。具体来说,需要通过向相应的方向寄存器(如DDRx)写入数据来设置GPIO端口的方向。
例如,将ATmega328P单片机的PB5口设置为输出,需要向DDRB寄存器的第5位写入1。
533-695
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