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AM3354 uboot中串口相关的问题



uboot中调试串口默认的是com0,我想修改成其他的,但是修改后,无效,没有打印信息输出,难道是我修改错文件了?请问技术人员,贵公司移植的uboot,修改调试串口在哪里修改啊???