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在看库文件的时候对于port的地址有两个,一个是GPIO_PORTA_BASE ,一个是GPIO_PORTA_AHB_BASE。在数据手册中描述gpio的寄存器时,只写出了AHB相关的地址。
不晓得为什么要分两种,这两者有什么区别,AHB gpio一般用在什么场合。
谢谢。