-10-
Document Name
AI7688H
Reference Manual
Version
V 2.0
Date 2019/08/08
3.2
Update bootloader with USB drive
USB drive must be in FAT file system or the file system cannot be
recognized by the AI7688H development platform.
Download bootloader image file, Please refer to ”09_Firmware”.
Save the bootloader file (uboot_<version>.bin) in the root directory of
a USB drive and rename it “lks7688.ldr”.
Plug the USB drive to AI7688H.
Press the Wi-Fi and MPU (Reset) button at the same time, then release
the MPU Reset button but hold the Wi-Fi button for at least 20
seconds.
After 20 seconds Wi-Fi LED will turn on. Release Wi-Fi button.
The board will start to read the bootloader (Wi-Fi LED blinks fast) and
perform the bootloader upgrade process (Wi-Fi LED blinks slowly). It
takes about 2 seconds to finish the bootloader upgrade process.
If bootloader is missing or damaged, it is no way to recovery by TFTP,
UART, or USB.
