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系统调试串口uart0 输出引脚默认是PE2、PE3，设计了个板子，uart0需要从PF2、PF4出，请问下uboot和linxu系统分别怎么修改，可以实现这个功能，麻烦大佬了
改 sys_config.fex 和 两个 board.dts
二楼说的对，我也看一下。
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