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在u-boot模式下,读写GPIO

Other Parts Discussed in Thread: AM3505

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