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如何把内核的打印信息定位到其他串口?

Other Parts Discussed in Thread: AM3352

平台:AM3352

SDK版本:ti-sdk-am335x-evm-06.00.00.00-Linux

请问如何把内核的打印信息定位到其他串口?我使用

我在uboot设置如下:set nandargs "setenv bootargs console=ttyO0,115200 console=ttyS1,115200 ${optargs} root=${nandroot} rootfstype=${nandrootfstype}",为什么串口1没有输出,但是串口0就有输出?