... a few days ago, I was following up the Google Coral github page, when I noticed a new repo: webcoral ...
"This is a project to demonstrate how to use the Coral USB Accelerator from the Chrome browser with WebUSB."
Cool, I was looking for this option since the accelerators became available.
I remembered that back in 2019, an issue was opened at TFJS: Coral edge tpu bindings for tf.js.
So I went back to check the issue's status; it's closed, but I left a comment 'Please see latest WebCoral demo', and I noticed an answer today:
'To follow up, we are working with Google Coral team to provide coral-usb support on the web, stay tuned.'
In that case, what else to do on a Saturday night, but to check out WebCoral?!
Quickly reading thourgh the README.md, I noticed that the device must be flashed from Chrome or terminal.
Chrome flashing won't work on MacOS, so it has to be done through the terminal.
A quick check that the USB device shows up, can be done in System Information app:
Next is terminal, so let's verify if lsusb is available in brew? Yes! Then let's install it!
# brew info lsusb lsusb: stable 1.0 (bottled) List USB devices, just like the Linux lsusb command https://github.com/jlhonora/lsusb /usr/local/Cellar/lsusb/1.0 (4 files, 12.8KB) * Poured from bottle on 2021-05-15 at 11:21:09 From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/lsusb.rb License: MIT ==> Analytics install: 1,556 (30 days), 4,775 (90 days), 21,189 (365 days) install-on-request: 1,554 (30 days), 4,772 (90 days), 21,180 (365 days) build-error: 0 (30 days) # brew install lsusbUsing lsusb the device appears as 'Global Unichip Corp. Composite Device'
# lsusb ... Bus 000 Device 001: ID 1a6e:089a Global Unichip Corp. Composite Device ...
# git clone --recurse-submodules https://github.com/google-coral/webcoral # cd webcoral # make download # make reset third_party/dfu-util/src/dfu-util \ -D third_party/libedgetpu/driver/usb/apex_latest_single_ep.bin \ -d 1a6e:089a -R || true dfu-util 0.10-dev Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc. Copyright 2010-2021 Tormod Volden and Stefan Schmidt This program is Free Software and has ABSOLUTELY NO WARRANTY Please report bugs to http://sourceforge.net/p/dfu-util/tickets/ dfu-util: Warning: Invalid DFU suffix signature dfu-util: A valid DFU suffix will be required in a future dfu-util release Opening DFU capable USB device... Device ID 1a6e:089a Device DFU version 0101 Claiming USB DFU Interface... Setting Alternate Interface #0 ... Determining device status... DFU state(2) = dfuIDLE, status(0) = No error condition is present DFU mode device DFU version 0101 Device returned transfer size 256 Copying data from PC to DFU device Download [=========================] 100% 10783 bytes Download done. DFU state(2) = dfuIDLE, status(0) = No error condition is present Done! Resetting USB to switch back to Run-Time mode... and now lsusb shows Google Inc. Composite Device
# lsusb ... Bus 001 Device 002: ID 18d1:9302 Google Inc. Composite Device ...
Next step is to complete 'Build WASM files inside a Docker container'.
# DOCKER_SHELL_COMMAND="make COMPILATION_MODE=opt wasm" make docker-shellWhich was a painfull one, and failed several times with
Server terminated abruptly (error code: 14, error message: 'Socket closed', log file: '/output/base/server/jvm.out')... but increasing Docker memory from 16GB to 25GB, after the 4th compilation error, did the trick. Anciously typed:
# make reset; make serverFired up a browser on localhost, to detect my face in my LinkedIn profile picture
this is just a 'demo' from the Coral team, but this featerue is arriving to TensorflowJS soon.
PS: bonus, that I also learned something new: requestVideoFrameCallback.