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48
keyboards/handwired/lagrange/config.h Normal file
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/* Copyright 2020 Dimitris Papavasiliou <dpapavas@protonmail.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "config_common.h"
/* USB Device descriptor parameter */
#define VENDOR_ID 0xFEED
#define PRODUCT_ID 0x2718
#define DEVICE_VER 0x0001
#define MANUFACTURER Dimitris Papavasiliou
#define PRODUCT Lagrange
#define EE_HANDS
#define SPLIT_USB_DETECT
/* key matrix size */
#define MATRIX_ROWS 14
#define MATRIX_COLS 6
/* pin-out */
#define MATRIX_ROW_PINS { E6, F1, F0, F4, F5, F6, F7 }
#define MATRIX_COL_PINS { B4, B5, D7, B6, C6, D6 }
#define MATRIX_ROW_PINS_RIGHT { B5, B4, D7, B6, C6, D6, D4 }
#define MATRIX_COL_PINS_RIGHT { C7, F7, F6, F5, F4, F1 }
#define UNUSED_PINS
/* COL2ROW or ROW2COL */
#define DIODE_DIRECTION ROW2COL
#define DEBOUNCE 5
#define LED_CAPS_LOCK_PIN D1
#define LED_SCROLL_LOCK_PIN D2

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keyboards/handwired/lagrange/info.json Normal file
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{
"keyboard_name": "Lagrange",
"url": "https://github.com/dpapavas/lagrange-keyboard",
"maintainer": "dpapavas",
"width": 19,
"height": 8.5,
"layouts": {
"LAYOUT": {
"layout": [
{"x":0, "y":0.75, "w":1.5}, {"x":1.5, "y":0.75}, {"x":2.5, "y":0.375}, {"x":3.5, "y":0}, {"x":4.5, "y":0.5}, {"x":5.5, "y":0.5}, {"x":12.5, "y":0.5}, {"x":13.5, "y":0.5}, {"x":14.5, "y":0}, {"x":15.5, "y":0.375}, {"x":16.5, "y":0.75}, {"x":17.5, "y":0.75, "w":1.5},
{"x":0, "y":1.75, "w":1.5}, {"x":1.5, "y":1.75}, {"x":2.5, "y":1.375}, {"x":3.5, "y":1}, {"x":4.5, "y":1.5}, {"x":5.5, "y":1.5}, {"x":12.5, "y":1.5}, {"x":13.5, "y":1.5}, {"x":14.5, "y":1}, {"x":15.5, "y":1.375}, {"x":16.5, "y":1.75}, {"x":17.5, "y":1.75, "w":1.5},
{"x":0, "y":2.75, "w":1.5}, {"x":1.5, "y":2.75}, {"x":2.5, "y":2.375}, {"x":3.5, "y":2}, {"x":4.5, "y":2.5}, {"x":5.5, "y":2.5}, {"x":12.5, "y":2.5}, {"x":13.5, "y":2.5}, {"x":14.5, "y":2}, {"x":15.5, "y":2.375}, {"x":16.5, "y":2.75}, {"x":17.5, "y":2.75, "w":1.5},
{"x":0, "y":3.75, "w":1.5}, {"x":1.5, "y":3.75}, {"x":2.5, "y":3.375}, {"x":3.5, "y":3}, {"x":4.5, "y":3.5}, {"x":5.5, "y":3.5}, {"x":12.5, "y":3.5}, {"x":13.5, "y":3.5}, {"x":14.5, "y":3}, {"x":15.5, "y":3.375}, {"x":16.5, "y":3.75}, {"x":17.5, "y":3.75, "w":1.5},
{"x":0, "y":4.75, "w":1.5}, {"x":2.5, "y":4.375}, {"x":3.5, "y":4}, {"x":14.5, "y":4}, {"x":15.5, "y":4.5}, {"x":17.5, "y":4.75, "w":1.5},
{"x":5, "y":5, "h":1.25}, {"x":6, "y":5, "h":1.5}, {"x":7, "y":5, "h":1.5}, {"x":8, "y":5.5}, {"x":10, "y":5.5}, {"x":11, "y":5, "h":1.5}, {"x":12, "y":5, "h":1.5}, {"x":13, "y":5, "h":1.25},
{"x":5, "y":7}, {"x":6, "y":6.5}, {"x":7, "y":7}, {"x":11, "y":7}, {"x":12, "y":6.5}, {"x":13, "y":7},
{"x":6, "y":7.5}, {"x":12, "y":7.5}
]
}
}
}

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keyboards/handwired/lagrange/keymaps/default/keymap.c Normal file
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/* Copyright 2020 Dimitris Papavasiliou <dpapavas@protonmail.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include QMK_KEYBOARD_H
#define EQL_ALT MT(MOD_RALT, KC_EQL)
#define MINS_ALT MT(MOD_LALT, KC_MINS)
#define HOME_GUI MT(MOD_LGUI, KC_HOME)
#define RGHT_GUI MT(MOD_RGUI, KC_RGHT)
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
[0] = LAYOUT(
/* Left hand */ /* Right hand */
KC_GESC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, TT(1),
KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_BSLS,
KC_CAPS, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT,
KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_RSFT,
KC_LCPO, KC_INS, KC_LBRC, MINS_ALT, KC_BSPC, KC_DEL, KC_PSCR, KC_PAUSE, KC_ENT, KC_SPC, EQL_ALT, KC_RBRC, KC_DEL, KC_RCPC,
HOME_GUI, KC_PGUP, KC_END, KC_LEFT, KC_UP, RGHT_GUI,
KC_PGDN, KC_DOWN
),
[1] = LAYOUT(
/* Left hand */ /* Right hand */
KC_TRNS, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_TRNS,
KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_F11,
KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_F12,
KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, RESET, RESET, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
KC_TRNS, KC_TRNS
),
};

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keyboards/handwired/lagrange/keymaps/dpapavas/config.h Normal file
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/* Copyright 2020 Dimitris Papavasiliou <dpapavas@protonmail.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#undef TAPPING_TERM
#define TAPPING_TERM 175
#define TAPPING_TERM_PER_KEY
#define PERMISSIVE_HOLD_PER_KEY
#define IGNORE_MOD_TAP_INTERRUPT

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keyboards/handwired/lagrange/keymaps/dpapavas/keymap.c Normal file
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/* Copyright 2020 Dimitris Papavasiliou <dpapavas@protonmail.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include QMK_KEYBOARD_H
#define CAPS_SFT MT(MOD_LSFT, KC_CAPS)
#define QUOT_SFT MT(MOD_RSFT, KC_QUOT)
#define PSCR_SFT MT(MOD_LSFT, KC_PSCR)
#define PAUSE_SFT MT(MOD_RSFT, KC_PAUSE)
#define F_SFT MT(MOD_LSFT, KC_F)
#define J_SFT MT(MOD_RSFT, KC_J)
#define PGUP_GUI MT(MOD_LGUI, KC_PGUP)
#define END_GUI MT(MOD_LGUI, KC_END)
#define UP_GUI MT(MOD_RGUI, KC_UP)
#define LEFT_GUI MT(MOD_RGUI, KC_LEFT)
#define EQL_CTL MT(MOD_RCTL, KC_EQL)
#define MINS_CTL MT(MOD_LCTL, KC_MINS)
#define BSPC_ALT LALT_T(KC_BSPC)
#define ENT_ALT LALT_T(KC_ENT)
#define SPC_ALT RALT_T(KC_SPC)
#define DEL_ALT RALT_T(KC_DEL)
enum tapdance_keycodes {
TD_LEFT,
TD_RGHT,
TD_C_X
};
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
[0] = LAYOUT(
/* Left hand */ /* Right hand */
KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_ESC,
KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_BSLS,
CAPS_SFT, KC_A, KC_S, KC_D, F_SFT, KC_G, KC_H, J_SFT, KC_K, KC_L, KC_SCLN, QUOT_SFT,
PSCR_SFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, PAUSE_SFT,
TD(TD_LEFT), KC_INS, KC_LBRC, MINS_CTL, BSPC_ALT, DEL_ALT, TD(TD_C_X), TD(TD_C_X), ENT_ALT, SPC_ALT, EQL_CTL, KC_RBRC, KC_DEL, TD(TD_RGHT),
KC_HOME, PGUP_GUI, END_GUI, LEFT_GUI, UP_GUI, KC_RGHT,
KC_PGDN, KC_DOWN
),
[1] = LAYOUT(
/* Left hand */ /* Right hand */
KC_TRNS, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_TRNS,
KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_F11,
KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_F12,
KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, RESET, RESET, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
KC_TRNS, KC_TRNS
),
};
/* The following helper macros define tap dances that support
* separated press, release, tap and double-tap functions. */
#define STEPS(DANCE) [DANCE] = ACTION_TAP_DANCE_FN_ADVANCED( \
NULL, \
dance_ ## DANCE ## _finished, \
dance_ ## DANCE ## _reset)
#define CHOREOGRAPH(DANCE, PRESS, RELEASE, TAP, DOUBLETAP) \
static bool dance_ ## DANCE ## _pressed; \
\
void dance_ ## DANCE ## _finished(qk_tap_dance_state_t *state, void *user_data) { \
if (state->count == 1) { \
if (state->pressed) { \
dance_ ## DANCE ## _pressed = true; \
PRESS; \
} else { \
TAP; \
} \
} else if (state->count == 2) { \
if (!state->pressed) { \
DOUBLETAP; \
} \
} \
} \
\
void dance_ ## DANCE ## _reset(qk_tap_dance_state_t *state, void *user_data) { \
if (state->count == 1) { \
if (dance_ ## DANCE ## _pressed) { \
RELEASE; \
dance_ ## DANCE ## _pressed = false; \
} \
} \
}
/* Define dance for left palm key. */
CHOREOGRAPH(TD_LEFT,
layer_invert(1), /* Temporarily toggle layer when held. */
layer_invert(1),
/* Press and release both shifts on tap, to change
* keyboard layout (i.e. language). */
SEND_STRING(SS_DOWN(X_LSFT) SS_DOWN(X_RSFT)
SS_UP(X_LSFT) SS_UP(X_RSFT)),
layer_invert(1)); /* Toggle layer (permanently) on
* double-tap. */
/* Define dance for right palm key. */
CHOREOGRAPH(TD_RGHT,
layer_invert(1), /* Same as above */
layer_invert(1),
/* Send a complex macro: C-x C-s Mod-t up. (Save in
* Emacs, switch to terminal and recall previous command,
* hopefully a compile command.) */
SEND_STRING(SS_DOWN(X_LCTRL) SS_TAP(X_X) SS_TAP(X_S) SS_UP(X_LCTRL)
SS_DOWN(X_LGUI) SS_TAP(X_T) SS_UP(X_LGUI) SS_TAP(X_UP)),
layer_invert(1));
/* This facilitates C-x chords in Emacs. Used as a modifier along
* with, say, the s-key, it saves, by sending C-x C-s. When tapped it
* just sends C-x. */
CHOREOGRAPH(TD_C_X,
SEND_STRING(SS_DOWN(X_LCTRL) SS_TAP(X_X)),
SEND_STRING(SS_UP(X_LCTRL)),
SEND_STRING(SS_DOWN(X_LCTRL) SS_TAP(X_X) SS_UP(X_LCTRL)),);
qk_tap_dance_action_t tap_dance_actions[] = {
STEPS(TD_LEFT), STEPS(TD_RGHT), STEPS(TD_C_X)
};
/* Set a longer tapping term for palm keys to allow comfortable
* permanent layer toggle. Also set an essentially infinite tapping
* term for certain mod-tap keys one tends to keep pressed (such as
* space, backspace, etc.). This prevents sending the modifier
* keycode by accident (allowing re-tap to get repeated key-press)
* and, in combination with permissive hold, they can still be used
* fine as modifiers. */
uint16_t get_tapping_term(uint16_t keycode, keyrecord_t *record) {
switch (keycode) {
case TD(TD_LEFT):
case TD(TD_RGHT):
return 250;
case BSPC_ALT:
case UP_GUI:
case LEFT_GUI:
return 5000;
default:
return TAPPING_TERM;
}
}
bool get_permissive_hold(uint16_t keycode, keyrecord_t *record) {
switch (keycode) {
case TD(TD_LEFT):
case TD(TD_RGHT):
case BSPC_ALT:
case UP_GUI:
case LEFT_GUI:
return true;
default:
return false;
}
}
/* Use the first LED to indicate the active layer. */
layer_state_t layer_state_set_user(layer_state_t state) {
writePin(D0, (get_highest_layer(state) > 0));
return state;
}
/* Cycle through the LEDs after initialization. */
void keyboard_post_init_user(void) {
const pin_t pins[] = {D0, D1, D2};
uint8_t i, j;
for (i = 0 ; i < sizeof(pins) / sizeof(pins[0]) + 2 ; i += 1) {
for (j = 0 ; j < sizeof(pins) / sizeof(pins[0]) ; j += 1) {
setPinOutput(pins[j]);
writePin(pins[j], (j == i || j == i - 1));
}
wait_ms(100);
}
}

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keyboards/handwired/lagrange/keymaps/dpapavas/rules.mk Normal file
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# Enable additional features.
DEBOUNCE_TYPE = sym_defer_pk
TAP_DANCE_ENABLE = yes

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keyboards/handwired/lagrange/lagrange.c Normal file
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/* Copyright 2020 Dimitris Papavasiliou <dpapavas@protonmail.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <LUFA/Drivers/USB/USB.h>
#include "lagrange.h"
#ifndef SPLIT_USB_TIMEOUT_POLL
# define SPLIT_USB_TIMEOUT_POLL 10
#endif
/* Instead of timing out, the slave waits indefinitely for the other
* side to signal that it has become master. This avoids both sides
* assuming the slave role when the USB port is powered but not
* otherwise active (e.g. when the host is turned off, or suspended).
* The SPI SS line is used for signaling. On power-up it is
* configured as input with pull-up enabled. When one side assumes
* the master role, it reconfigures the line for SPI, and pulls it low
* to select the slave, which doubles as the signal. */
bool is_keyboard_master(void) {
static int8_t is_master = -1;
if (is_master < 0) {
while (readPin(SPI_SS_PIN)) {
if (USB_Device_IsAddressSet()) {
is_master = 1;
return is_master;
}
wait_ms(SPLIT_USB_TIMEOUT_POLL);
}
is_master = 0;
USB_Disable();
USB_DeviceState = DEVICE_STATE_Unattached;
}
return is_master;
}
void keyboard_pre_init_kb(void) {
setPinInputHigh(SPI_SS_PIN);
keyboard_pre_init_user();
}

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keyboards/handwired/lagrange/lagrange.h Normal file
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/* Copyright 2020 Dimitris Papavasiliou <dpapavas@protonmail.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "quantum.h"
#if !defined(SPI_SS_PIN)
# define SPI_SS_PIN B0
#endif
#define SPI_SCK_PIN B1
#define SPI_MOSI_PIN B2
#define SPI_MISO_PIN B3
#define LAYOUT( \
l00, l01, l02, l03, l04, l05, r05, r04, r03, r02, r01, r00, \
l10, l11, l12, l13, l14, l15, r15, r14, r13, r12, r11, r10, \
l20, l21, l22, l23, l24, l25, r25, r24, r23, r22, r21, r20, \
l30, l31, l32, l33, l34, l35, r35, r34, r33, r32, r31, r30, \
l40, l42, l43, l44, l45, l46, l47, r47, r46, r45, r44, r43, r42, r40, \
l50, l51, l52, r52, r51, r50, \
l70, r70) \
{ \
{l00, l01, l02, l03, l04, l05}, \
{l10, l11, l12, l13, l14, l15}, \
{l20, l21, l22, l23, l24, l25}, \
{l30, l31, l32, l33, l34, l35}, \
{l40, KC_NO, l42, l43, l44, l45}, \
{KC_NO, KC_NO, KC_NO, l50, l51, l46}, \
{KC_NO, KC_NO, KC_NO, l70, l52, l47}, \
\
{r00, r01, r02, r03, r04, r05}, \
{r10, r11, r12, r13, r14, r15}, \
{r20, r21, r22, r23, r24, r25}, \
{r30, r31, r32, r33, r34, r35}, \
{r40, KC_NO, r42, r43, r44, r45}, \
{KC_NO, KC_NO, KC_NO, r50, r51, r46}, \
{KC_NO, KC_NO, KC_NO, r70, r52, r47} \
}

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# Lagrange
An ergonomic, split, concave keyboard, with convex thumb pads. See the [project page](https://github.com/dpapavas/lagrange-keyboard) for more info.
![Lagrange](https://github.com/dpapavas/lagrange-keyboard/blob/master/doc/lagrange_keyboard.png?raw=true)
* Keyboard Maintainer: [Dimitris Papavasiliou](https://github.com/dpapavas)
* Hardware Supported: Lagrange PCB Rev A
* Hardware Availability: See the build guide on the [project page](https://github.com/dpapavas/lagrange-keyboard).
Make example for this keyboard (after setting up your build environment):
make handwired/lagrange:default
Flashing example for this keyboard:
make handwired/lagrange:default:flash
To program the keyboard you'll need to reset it. This can be accomplished, either through the reset button, accessible via a hole in the bottom cover, or, if you've assigned the `RESET` keycode to a key, by pressing that key.
See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).

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keyboards/handwired/lagrange/rules.mk Normal file
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# MCU name
MCU = atmega32u4
# Bootloader selection
BOOTLOADER = atmel-dfu
# Build Options
# change yes to no to disable
#
BOOTMAGIC_ENABLE = no # Virtual DIP switch configuration
MOUSEKEY_ENABLE = no # Mouse keys
EXTRAKEY_ENABLE = yes # Audio control and System control
CONSOLE_ENABLE = yes # Console for debug
COMMAND_ENABLE = no # Commands for debug and configuration
# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
SLEEP_LED_ENABLE = no # Breathing sleep LED during USB suspend
# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
NKRO_ENABLE = no # USB Nkey Rollover
BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
RGBLIGHT_ENABLE = no # Enable keyboard RGB underglow
BLUETOOTH_ENABLE = no # Enable Bluetooth
AUDIO_ENABLE = no # Audio output
UNICODE_ENABLE = yes
SPLIT_KEYBOARD = yes
SPLIT_TRANSPORT = custom
SRC += transport.c spi_master.c

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keyboards/handwired/lagrange/transport.c Normal file
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/* Copyright 2020 Dimitris Papavasiliou <dpapavas@protonmail.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <spi_master.h>
#include "quantum.h"
#include "split_util.h"
#include "timer.h"
#include "lagrange.h"
struct led_context {
led_t led_state;
layer_state_t layer_state;
};
uint8_t transceive(uint8_t b) {
for (SPDR = b ; !(SPSR & _BV(SPIF)) ; );
return SPDR;
}
/* The SPI bus, doens't have any form of protocol built in, so when
* the other side isn't present, any old noise on the line will appear
* as matrix data. To avoid interpreting data as keystrokes, we do a
* simple n-way (8-way here) handshake before each scan, where each
* side sends a prearranged sequence of bytes. */
void shake_hands(bool master) {
const uint8_t m = master ? 0xf8 : 0;
const uint8_t a = 0xa8 ^ m, b = 0x50 ^ m;
uint8_t i;
i = SPSR;
i = SPDR;
do {
/* Cylcling the SS pin on each attempt is necessary, as it
* resets the AVR's SPI core and guarantees proper
* alignment. */
if (master) {
writePinLow(SPI_SS_PIN);
}
for (i = 0 ; i < 8 ; i += 1) {
if (transceive(a + i) != b + i) {
break;
}
}
if (master) {
writePinHigh(SPI_SS_PIN);
}
} while (i < 8);
}
bool transport_master(matrix_row_t matrix[]) {
const struct led_context context = {
host_keyboard_led_state(),
layer_state
};
uint8_t i;
/* Shake hands and then receive the matrix from the other side,
* while transmitting LED and layer states. */
shake_hands(true);
spi_start(SPI_SS_PIN, 0, 0, 4);
for (i = 0 ; i < sizeof(matrix_row_t[MATRIX_ROWS / 2]) ; i += 1) {
spi_status_t x;
x = spi_write(i < sizeof(struct led_context) ?
((uint8_t *)&context)[i] : 0);
if (x == SPI_STATUS_TIMEOUT) {
return false;
}
((uint8_t *)matrix)[i] = (uint8_t)x;
}
spi_stop();
return true;
}
void transport_slave(matrix_row_t matrix[]) {
static struct led_context context;
struct led_context new_context;
uint8_t i;
/* Do the reverse of master above. Note that timing is critical,
* so interrupts must be turned off. */
cli();
shake_hands(false);
for (i = 0 ; i < sizeof(matrix_row_t[MATRIX_ROWS / 2]) ; i += 1) {
uint8_t b;
b = transceive(((uint8_t *)matrix)[i]);
if (i < sizeof(struct led_context)) {
((uint8_t *)&new_context)[i] = b;
}
}
sei();
/* Update the layer and LED state if necessary. */
if (!isLeftHand) {
if (context.led_state.raw != new_context.led_state.raw) {
context.led_state.raw = new_context.led_state.raw;
led_update_kb(context.led_state);
}
if (context.layer_state != new_context.layer_state) {
context.layer_state = new_context.layer_state;
layer_state_set_kb(context.layer_state);
}
}
}
void transport_master_init(void) {
/* We need to set the SS pin as output as the handshake logic
* above depends on it and the SPI master driver won't do it
* before we call spi_start(). */
writePinHigh(SPI_SS_PIN);
setPinOutput(SPI_SS_PIN);
spi_init();
shake_hands(true);
}
void transport_slave_init(void) {
/* The datasheet isn't very clear on whether the internal pull-up
* is selectable when the SS pin is used by the SPI slave, but
* experimentations shows that it is, at least on the ATMega32u4.
* We enable the pull-up to guard against the case where both
* halves end up as slaves. In that case the SS pin would
* otherwise be floating and free to fluctuate due to picked up
* noise, etc. When reading low it would make both halves think
* they're asserted making the MISO pin an output on both ends and
* leading to potential shorts. */
setPinInputHigh(SPI_SS_PIN);
setPinInput(SPI_SCK_PIN);
setPinInput(SPI_MOSI_PIN);
setPinOutput(SPI_MISO_PIN);
SPCR = _BV(SPE);
shake_hands(false);
}