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【技术讨论】
AIO-3568J 修改波特率115200后，Uboot乱码，Kernel打印正常
发表于 2023-1-12 11:30:31
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AIO-3568J 修改波特率115200
Ubuntu18.04系统
修改Uboot:
~\u-boot\configs\firefly-rk3568_defconfig
-CONFIG_BAUDRATE=1500000
+CONFIG_BAUDRATE=115200
保存修改后，重新编译
./build.sh uboot
修改Kernel:
~\kernel\arch\arm64\boot\dts\rockchip\rk3568_linux.dtsi
fiq-debugger {
compatible = "rockchip,fiq-debugger";
rockchip,serial-id = <2>;
rockchip,wake-irq = <0>;
/* If enable uart uses irq instead of fiq */
rockchip,irq-mode-enable = <1>;
rockchip,baudrate = <115200>;//<1500000>; /* Only 115200 and 1500000 */
interrupts = <GIC_SPI 252 IRQ_TYPE_LEVEL_LOW>;
pinctrl-names = "default";
pinctrl-0 = <&uart2m0_xfer>;
status = "okay";
};
修改完成后，重新编译
sudo ./build.sh extboot
更新链接
sudo ./mkfirmware.sh
打包固件
sudo ./build.sh updateimg
------------------------------------------------------
重新烧录后，SecureCRT调试软件中，波特率按照115200打开串口： Uboot显示乱码，Kernel打印正常
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0.165301] console [ttyFIQ0] enabled
[ 0.173011] bootconsole [uart8250] disabled
[ 0.173011] bootconsole [uart8250] disabled
[ 0.177898] Registered fiq debugger ttyFIQ0
[ 0.179013] vcc3v3_sys: supplied by dc_12v
[ 0.179526] vcc5v0_sys: supplied by dc_12v
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