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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                目錄在:arch/arm/dts中: ![](https://img.kancloud.cn/cc/be/ccbe4e1a98e69c8cac32c2de9ab7d530_832x128.png =600x) ### 在rk3308-u-boot.dtsi中,可以看到一個stdout指向uart2,其實就是把串口2作為標準輸出: ![](https://img.kancloud.cn/7e/ef/7eefb97a522de4f89bd3b0ac8ee12606_832x290.png =600x) ### 需要注意的是,serial驅動在加載的時候需要依賴clk驅動,如果在這個時候clk驅動還沒有正常加載,需要在對應uart的dts節點中加入clock-frequency屬性,同樣在該dts文件中可以找到uart2描述: ![](https://img.kancloud.cn/5a/2c/5a2ca6c862fc8f65a7d06b27e535381b_636x180.png =600x) ### status可以是okay也可以是disable,表示使能和關閉。 最后我們在u-boot/configs/evb-rk3308\_defconfig文件中配置好相關串口做控制臺以及對應的波特率就可以了。
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