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l138lcdk uart2引导uboot 调试口乱码



我用l138lcdk uart2引导uboot 后 再用minicom 打开uart2 乱码 不能正常交互命令

如果用 其他uart引导uboot 后在用minicom 连接uart2是正常的

uboot的调试口是默认的uart2

请赐教!