Commit Graph

17 Commits

Author SHA1 Message Date
Samuel Holland
1fd0bac031 firmware: Use REG_SYS macro where appropriate
This shortens a very long line.
2021-08-02 10:17:09 +02:00
Samuel Holland
ce6638eb92 firmware: Remove unused variable 2021-08-02 10:14:24 +02:00
Samuel Holland
bd69a00f7a common: Improve crc8 generation
Start with 0xff instead of 0x00, so the CRC will be nonzero (and length
dependent) for data that is all zeroes.

Remove unnecessary masking, since `crc` is already an 8-bit integer.
2021-08-02 10:13:06 +02:00
Ondrej Jirman
3b723583e7 firmware: Make interrupt signal shorter (10us)
This is long enough, comparable to 100kHz I2C speeds.
2021-08-02 10:12:48 +02:00
Ondrej Jirman
2fbc2e057e firmware: Implement scanning block
This allows to disable the keyboard. The firmware will never scan
for keys pressed in this mode, and it will powerdown the MCU most of the
time.
2021-08-02 10:12:48 +02:00
Ondrej Jirman
41418cdc14 firmware: Jump to stock firmware sooner after powerup
Signed-off-by: Ondrej Jirman <megous@megous.com>
2021-08-02 10:12:48 +02:00
Ondrej Jirman
176a2da7e2 firmware: Implement USB enabled/disable control via I2C 2021-08-02 10:05:43 +02:00
Ondrej Jirman
134b4b6a8b firmware: Move more of the USB shutdown control to usb_enable/usb_disable
- make sure USB resources are re-enabled before jumping to bootloader
- make sure all USB resources are disabled prior to jumping to user fw
2021-08-02 10:03:48 +02:00
Ondrej Jirman
6a5fe581b9 Implement flashing over I2C and user/stock firmware support
I2C register layout changed a bit to make various operations easier
to implement in FW and for the user.

Flashing/debugging tools now share more code. Firmware is now more
configurable (it's now possible to compile-out various features).

Self-testing for column-shorts is implemented.

Firmware is optimized for low power consumption.
2021-06-28 15:09:47 +02:00
Ondrej Jirman
04ca071b09 Fixup/document I2C 2021-06-19 02:51:23 +02:00
Ondrej Jirman
fbfa245ad4 Allow to use debug printing from interrupt handlers 2021-06-19 02:50:34 +02:00
Ondrej Jirman
2725248532 Add USB stack for easier printf() based debugging of the firmware 2021-06-18 19:43:11 +02:00
Ondrej Jirman
c8d8eef090 Fix key release change detection in polling mode 2021-06-18 18:28:56 +02:00
Ondrej Jirman
b9b02a5e73 Update some comments 2021-06-16 14:44:18 +02:00
Ondrej Jirman
bca8c47f46 Implement polled mode and key bitmap change signalling via external interrupt
- this firmware consumes about 4-5 mA (can be probably made lower)
2021-06-16 14:09:25 +02:00
Ondrej Jirman
e59f647d83 Allow to switch to bootloader mode via FN+PINE+F 2021-06-15 09:21:31 +02:00
Ondrej Jirman
d3c45f58a4 Initial commit 2021-06-14 00:10:49 +02:00