b3412ee2a4
to user -> to use -- in second paragraph of Flashing over USB section users stock stock -> uses stock -- in first paragraph of Flashing over I2C section fiwmare -> firmware -- in second paragraph of Flashing over I2C section
118 lines
4.0 KiB
Plaintext
118 lines
4.0 KiB
Plaintext
Flashing over USB
|
|
=================
|
|
|
|
This method allows updating the stock firmware on the keyboard.
|
|
|
|
Flashing tool ppkb-usb-flasher can be used to flash the firmware over USB.
|
|
You'll have to solder USB cable to the keyboard controller board to be able
|
|
to use this method.
|
|
|
|
For example to build and flash your own firmware you could run these
|
|
commands:
|
|
|
|
# save the original firmware in case you want to restore it
|
|
|
|
./ppkb-usb-flasher info > saved-info.txt
|
|
./ppkb-usb-flasher --rom-out saved-rom.bin read
|
|
|
|
# build the new firmware (you may need sdcc 4.1, older versions may
|
|
# miscompile the firmware)
|
|
|
|
(cd firmware && ./build.sh)
|
|
|
|
# flash the new firmware
|
|
|
|
./ppkb-usb-flasher --rom-in firmware/build/fw-stock.bin write reset
|
|
|
|
|
|
|
|
Full help output
|
|
----------------
|
|
|
|
Usage: ppkb-usb-flasher [--rom-in <path>] [--rom-out <path>] [--verbose]
|
|
[--help] [<read|write|info|reset>...]
|
|
|
|
Options:
|
|
-i, --rom-in <path> Specify path to binary file you want to flash.
|
|
-o, --rom-out <path> Specify path where you want to store the contents
|
|
of code ROM read from the device.
|
|
-s, --size <size> Specify how many bytes of code rom to flash
|
|
starting from offset 0x2000 in the rom file.
|
|
-v, --verbose Show details of what's going on.
|
|
-h, --help This help.
|
|
|
|
Commands:
|
|
info Display information about the firmware.
|
|
read Read ROM from the device to --rom-out file.
|
|
write Flash ROM file to the device from --rom-in.
|
|
reset Perform software reset of the MCU.
|
|
|
|
Format of the ROM files is a flat binary. Only the part of it starting
|
|
from 0x2000 will be flashed. Use -s to specify how many bytes to write.
|
|
|
|
|
|
Flashing over I2C
|
|
=================
|
|
|
|
This method uses stock firmware's flashing interface to allow writing user's
|
|
own firmware to the keyboard, while keeping the stock firmware intact.
|
|
|
|
Stock firmware will remain present and available for future updates of the
|
|
users firmware.
|
|
|
|
You can use this method without having to disassemble the keyboard, or
|
|
solder anything.
|
|
|
|
You'll need to build the user firmware in a special way, so that it's placed
|
|
at address 0x4000 in code ROM. Interrupt vectors are forwarded with 0x4000
|
|
offset.
|
|
|
|
|
|
For example to build and flash your own firmware you could run these
|
|
commands:
|
|
|
|
# build the new firmware (you may need sdcc 4.1, older versions may
|
|
# miscompile the firmware)
|
|
|
|
(cd firmware && ./build.sh)
|
|
|
|
# flash the new firmware
|
|
|
|
./ppkb-i2c-flasher --rom-in firmware/build/fw-user.bin write reset
|
|
|
|
Depending on the user firmware, you may need to change stock firmware entry
|
|
method using -e option.
|
|
|
|
|
|
Full help output
|
|
----------------
|
|
|
|
Usage: ppkb-i2c-flasher [--rom-in <path>] [--rom-out <path>] [--verbose]
|
|
[--help] [<read|write|erase|info|reset>...]
|
|
|
|
Options:
|
|
-i, --rom-in <path> Specify path to binary file you want to flash.
|
|
-o, --rom-out <path> Specify path where you want to store the contents
|
|
of code ROM read from the device.
|
|
-s, --size <size> Specify how many bytes of code rom to flash
|
|
starting from offset 0x4000 in the rom file.
|
|
-e, --entry <manual|i2c|none>
|
|
Specify how to enter the stock firmware:
|
|
- manual: Ask the user to power-cycle the keyboard
|
|
- i2c: Send I2C command to make supporting user
|
|
- none: Assume stock firmware is already running
|
|
-v, --verbose Show details of what's going on.
|
|
-h, --help This help.
|
|
|
|
Commands:
|
|
info Display information about the current firmware.
|
|
read Read ROM from the device to --rom-out file.
|
|
write Flash ROM file to the device from --rom-in.
|
|
erase Erase the user firmware.
|
|
reset Perform software reset of the MCU.
|
|
|
|
Format of the ROM files is a flat binary. Only the part of it starting
|
|
from 0x4000 will be flashed. Use -s to specify how many bytes to write.
|
|
The stock firmware between 0x2000 and 0x4000 will be preserved.
|
|
|