1 怎样根据am3505的数据手册中的memory map 找到GPIO_97对应的寄存器地址
2 目标板启动以后进入u-boot命令行,读写某一地址(不是SDRAM的映射地址),没有反应,如下图片
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可以参考pinmux tool的user guide,来确定是否已经配置正确了pinmux,然后再进行读写