1 # Teensy LC, 3.0, 3.1, 3.2 support
3 These ARM Teensies are now supported through [ChibiOS](http://chibios.org).
5 Follow the setup instructions in `tmk_core/protocol/chibios/README.md` to install ChibiOS and required toolchain.
7 Running `make` in `keyboard/teensy_lc_onekey` should create a working firmware in `build/`, called `ch.hex`.
9 For more notes about the ChibiOS backend in TMK, see `tmk_core/protocol/chibios/README.md`.
11 ## About this onekey example
13 It's set up for Teensy LC. To use 3.x, you'll need to edit the `Makefile` (and comment out one line in `mcuconf.h`). A sample makefile for Teensy 3.0 is provided as `Makefile.3.0`, can be used without renaming with `make -f Makefile.3.0`. Similarly for Teensy 3.2, there's `Makefile.3.2`.
17 TMK itself is written by hasu, original sources [here](https://github.com/tmk/tmk_keyboard).
19 The USB support for Kinetis MCUs is due to RedoX. His ChibiOS fork is also [on github](https://github.com/RedoXyde/ChibiOS); but it doesn't include Teensy LC definitions.
21 ## Features that are not implemented yet
23 Currently only the more fancy suspend features are not there (power saving during suspend). The rest should work fine (reports either way are welcome).
25 # Matrix programming notes
27 The notes below explain what commands can be used to examine and set the status of Teensy pins.
29 ## ChibiOS pin manipulation basics
33 Each pin sits on a "port", each of which comprises at most 32 individual pins.
34 So for instance "PTC5" from Kinetis manual/datasheet refers to port C (or GPIOA), pin 5. Most functions dealing with pins take 2 parameters which specify the pin -- the first being the port, the second being the pin number.
36 Within ChibiOS, there are definitions which simplify this a bit for the Teensies. `TEENSY_PINn_IOPORT` represents the port of the MCU's pin connected Teensy's PIN `n`, and `TEENSY_PINn` represents its MCU's pin number.
40 A MCU pin can be in several modes. The basic command to set a pin mode is
42 palSetPadMode(TEENSY_PINn_IOPORT, TEENSY_PINn, PAL_MODE_INPUT_PULLUP);
44 The last parameter is the mode. For keyboards, the usual ones that are used are `PAL_MODE_INPUT_PULLUP` (input with a pullup), `PAL_MODE_INPUT_PULLDOWN` (input with a pulldown), `PAL_MODE_INPUT` (input floating, a.k.a. Hi-Z), `PAL_MODE_OUTPUT_PUSHPULL` (output in the Arduino sense -- can be then set HIGH or LOW).
48 Pins are set HIGH (after they've been put into `OUTPUT_PUSHPULL` mode) by
50 palSetPad(TEENSY_PINn_IOPORT, TEENSY_PINn);
54 palClearPad(TEENSY_PINn_IOPORT, TEENSY_PINn);
56 Toggling can be done with
58 palTogglePad(TEENSY_PINn_IOPORT, TEENSY_PINn);
60 Alternatively, you can use
62 palWritePad(TEENSY_PINn_IOPORT, TEENSY_PINn, bit);
64 where `bit` is either `PAL_LOW` or `PAL_HIGH` (i.e. `0` or `1`).
68 Reading pin status is done with
70 palReadPad(TEENSY_PINn_IOPORT, TEENSY_PINn);
72 The function returns either `PAL_HIGH` (actually `1`) or `PAL_LOW` (actually `0`).
76 All the commands that are available for pin manipulation through ChibiOS HAL are documented in [ChibiOS PAL driver docs](http://chibios.sourceforge.net/docs3/hal/group___p_a_l.html).