1.设置usb转串口
首先进入sdk的kernel目录
make menuconfig
选中 Device Drivers > USB support > USB Serial Converter support下面的
<*> USB CP210x family of UART Bridge Controllers
<*> USB Prolific 2303 Single Port Serial Driver
因为要编译成boot.img和resource.img来烧写，所以选中*即可
2.编译
cd kernel
make ARCH=arm64 rk3399-sapphire-excavator-edp.img -j12
CC kernel/configs.oLD kernel/built-in.oCC drivers/usb/serial/cp210x.oCC drivers/usb/serial/usb-serial.oCC drivers/usb/serial/pl2303.oLD drivers/usb/serial/usbserial.oLD drivers/usb/serial/built-in.oLD drivers/usb/built-in.oLD drivers/built-in.o