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Tiva-M4Launchpad IO配置上拉问题

Other Parts Discussed in Thread: TM4C123GH6PM

    TM4C123GH6PM 如何将PA3与PA4管脚配制成输入上拉模式,按照正常的配置方式不行。

看TIVA-WARE的管脚配置函数,当配置输入状态时默认为上拉模式,不知道这样理解对不对。

资料上说PA2-PA5默认不是IO功能,一开始以为与GPIOCR寄存器有关,实际也没关系的。

求大神给配置代码,谢谢啦。