Some debugging methods

View the kernel startup print information: dmesg

Check the running status of the communication module: logcat-B radio logcat-s pppd

Echo 0>/proc/sys/kernel/printk // disable kernel printing information

Set property manually: setprop

Query System property: getprop

Query input event: getevent

View the input event reporting rate: getevent-r/dev/input/event *

Fastboot usage:

Fastboot flash bootloader u-boot.bin

Fastboot flash kernel uimage

Fastboot flash recovery. img

Fastboot flash ramdisk. img

Fastboot flash system. img

Use ADB Shell

ADB push

ADB pull