The st7 firmware, developed and maintained by Lemote, is controlled and upgraded using Pmon, so before performing any task you should enter there.

Under the Pmon prompt type:

PMON> rdiic 80 0

After running this command, you will see something like this:

slave_addr 0x80, index_addr 0x0
slave_addr : 0x80, index_addr : 0x0, value 0x15

The first nibble of the “value” field is the major version, the second nibble is the minor field. In the above example, the returned 0×15 corresponds to version 1.5 of the firmware (the first nibble being 1, the second nibble being 5).

Check register 5:

• If equals to 0xae: OS controls the charge
• If equals to 0×00: ST7 firmware controls the charge

• Set up a TFTP server on your machine/network (use google to find any Open source one that works under windows or Synaptic for Linux)
• Configure it to use a default directory that is not the root of your machine
• Copy the latest ST7 firmware (BIN file) to that directory
• For convenience rename the file name to something short such as s7.bin
• Enter Pmon by repeatedly pressing the <DEL> key at boot time (when the G image appears)
• Set the ST7 burning flag to '1' by typing the following command :

wriic 80 6 1 

• Press the reset button located under the Gdium using a needle (not the mic hole)
• Enter the Pmon again
• Assign an routable IP address to the Gdium by typing:

ifaddr rtl0 IP_Address

• Update the firmware by fetching the file on the TFTP server and typing:

load -r -k tftp://IP_Address/s7.bin

• Done!

(no confirmation is issued that operation run well)

• The operation can also be performed from a USB key such as the Gkey
• Copy the latest ST7 firmware (BIN file) to USB key
• For convenience rename the file name to something short such as s7.bin
• Enter Pmon by repeatedly pressing the <DEL> key at boot time (when the G image appears)
• Set the ST7 burning flag to '1' by typing the following command :

wriic 80 6 1 

• Press the reset button located under the Gdium using a needle (not the mic hole)
• Enter the Pmon again
• Update the firmware by reading the file from the USB key.
• The location can be different media, so for example if you copied the firmware image on /path/pmon.bin in the first ext2/3 partition of your Gkey it would be:

load -r -k /dev/fs/ext2@usbg0/path/s7.bin

load -r -k /dev/fat/disk@usbg0/path/s7.bin

load -r -k /dev/fat/disk@usb0/path/s7.bin

• Done!

(no confirmation is issued that operation run well)

The burning flag will be off automatically after completing the software update procedure. It is however strongly recommended to perform a hardware reset/reboot so the whole chip gets re-initialized.
It is not possible to extract the burning flag value directly however:

• When register 0 is equal to the ST7 firmware version number: that means the burning flag is not on
• A different value (most likely 0×00, but can vary), it means the burning flag is on

• Pmon
• ST7 MCU