Updating Tomu

Your Tomu must be updated in order to work best. To work with Tomu, you can use an experimental method via Google Chrome, otherwise you must first install dfu-util. With either method updating Tomu is as easy as loading any other program!

Via Google Chrome

Get Google Chrome

You might know the drill, visit https://google.com/chrome and grab the right version for your platform or install the FOSS version Chromium from your package manager.

Update Tomu bootloader

Next visit https://devanlai.github.io/webdfu/dfu-util/ with your Tomu plugged in and select the right vendor ID 0x1209 aka tapboot from the prepopulated options or type it and click “Connect”. You should see something like Name: Tomu Bootloader v2.0-rc4 MFG: Kosagi Serial: DFU: [1209:70b1] cfg=1, intf=0, alt=0, name="Tomu Bootloader v2.0-rc4" serial=""

Next, download toboot-boosted.dfu.

Finally update your Tomu by browsing to the toboot-boosted.dfu file in the “Firmware Download” area of the page and then click “Download” to flash it to the device. Once that completes you can click “Connect” again to verify the version strings changed.

Upload a program

To configure a program you can try a prebuilt one from the samples page Samples or compile your own using the directions there. Put it on your Tomu by browsing to the file in the “Firmware Download” area of the page and then click “Download” to flash it to the device.

Once a program is installed your Tomu will stop blinking red/green (the DFU bootloader indicator) and will blink whatever is coded into the program while executing it. When flashing any sample program it doesn’t stick permanently, in this case you can simply unplug/replug the Tomu to get back to the bootloader. With a non-sample application, once it is flashed they are configured to auto-start on power-up, so in order to get back into Bootloader mode to flash something else you must use a tweezer or paperclip across the outer contacts when inserting it into the USB port (it is important that it is shorted during power-up. I’ve found that putting the Tomu into a USB extension cable or hub so you can short the connection while plugging the cable with your other hand to be easiest.

Installing dfu-util

The dfu-util suite of programs is used to talk to Toboot, the Tomu bootloader. Most package managers have some form of dfu-util available.

Ubuntu and Debian

sudo apt-get install dfu-util

Create /etc/udev/rules.d/10-tomu.rules and populate it with the following (giving everyone on your system write access to your device):

ATTRS{idProduct}=="70b1", ATTRS{idVendor}=="1209", MODE="777"

You can give it a more restrictive mode if you also give it a group that you’re in, for example:

ATTRS{idProduct}=="70b1", ATTRS{idVendor}=="1209", MODE="664", GROUP="plugdev"

Fedora

sudo yum install dfu-util

Arch

sudo pacman -Sy dfu-util

Windows

Download dfu-util-static.exe from the dfu-util repository and rename it to dfu-util.exe. Place it somewhere in your $PATH for convenience. To build examples, you’ll also want to get dfu-suffix.exe and put it in your $PATH.

Mac

Install Homebrew and run:

brew install dfu-util

Updating Toboot

Normally, Toboot is unable to overwrite itself. To work around this, use a “boosted” form of Toboot.

First, determine your current version by running dfu-util --list:

user@machine:~$ dfu-util --list
dfu-util 0.7

Copyright 2005-2008 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2012 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to [email protected]

Found DFU: [1209:70b1] devnum=0, cfg=1, intf=0, alt=0, name="Tomu Bootloader v2.0-rc4"
user@machine:~$ 