tmk7637, branch main

removed the K7637 symbol: it's now displayed as the cgit logo

2025-10-05T18:18:51+00:00

removed usbconfig.h

2021-05-17T21:00:01+00:00

* this is required by VUSB which we don't support currently anyway

fixup: minor typo

2021-05-15T17:56:24+00:00

document how to build a solenoid driver and install a solenoid

2021-05-15T17:53:41+00:00

* In contrast to the relay breakout board I was using before,
  the solenoid driver is HIGH-active, so some code had to be changed
  as well.

README: fixed up link to the Teensy 2.0++ pinout

2021-05-04T16:48:25+00:00

disable debug messages by default - they can still be enabled using magic keys

2021-05-04T16:43:25+00:00

README: documented which chips to cut off from power and how to prepare the Teensy 2.0++

2021-05-04T14:45:14+00:00

revised solenoid triggering: it behaves more like an IBM Beamspring solenoid now

2021-05-04T13:21:45+00:00

* It is deactivated after a short while, so the state of the solenoid does
  not correspond with the state of the key.
* The MCU now less frequently crashes, but quite possibly we will need a separate
  power supply to use the solenoid.

optimized the LED and buzzer wiring

2021-05-04T00:22:31+00:00

* since we use timer 3 exclusively for the buzzer but trigger the pin
  using an IRQ handler, there is no longer any need to occupy a high-resolution
  pin for the buzzer.
* PD5 became a new high resolution LED
* PD0 became the new buzzer pin
* rearranged the pins used for the different LEDs so that the distribution
  of high-resolution LEDs is symmetric
* Timer 0 is no longer used/modified by setting LEDs.
  This avoids some workarounds as timer 0 is also used by tmk's timer module.
* The song routines could be slightly improved using the timer module.
* documented the LED and buzzer pinout in README

fixed some memset() and document how to flash firmwares manually

2021-04-29T21:58:40+00:00