Seeed Technology Co., Ltd ReSpeaker Core v2 User Guid
B.
Boot from the eMMC
There is no firmware in the EMMC when leaving the factory, you can flash the ReSpeaker image files to the
ReSpeaker's eMMC (onboard flash memory) by using your PC or Mac. Then the ReSpeaker will boot from it's
eMMC (onboard flash memory) and not from the SD card.
Step 1. Download our latest image zip file
respeaker-debian-9-iot-flasher-********-
4gb.img.xz
or
respeaker-debian-9-lxqt-flasher-********-4gb.img.xz
at OneDrive. The lxqt version
comes with Debian desktop and the iot version does not. And the flasher version is for flashing eMMC,
and the sd version is for booting from SD card.
Step 2. Burn the
*.img.xz
file directly to SD card with Etcher, or unzip the
*.img.xz
file to a
*.img
file, then
burn it to SD card with other image writing tools.
Step 3. After burning SD card, insert the SD card in the ReSpeaker Core v2.0. Power the board using the
PWR_IN micro USB and do not remove the SD card while it's flashing.
During the flashing process, you'll see the USER1 and USER2 LEDs blink alternately. It will take about 10
minutes to complete. When the LEDs turn off, you can power off the board, pull out the SD card and power
again. If the LEDs light up, that means the image was flashed to the eMMC correctly.
You can also check the image version with this command: cat /etc/issue.net.
Serial Console
Now your ReSpeaker Core v2.0 can boot, you might want to get access to the Linux system via a console, to
setup the WiFi, etc. You have two ways to get the console:
A. The OTG USB port - This requires a running Linux system on the board
B. The UART port - This is the hard way to access the console, it can be used for debugging low level issues
Connection via OTG
Step 1. Find a micro USB cable, and please make sure it's a data cable (not just a power cable), plug the
micro USB end to the ReSpeaker's OTG micro USB port (There're two micro USB ports on the ReSpeaker
board, which are labeled with different silk-screen, one is PWR_IN and another is OTG), then plug another
end of this cable into your computer.
