A keyboards/handwired/lagrange/config.h => keyboards/handwired/lagrange/config.h +48 -0
@@ 0,0 1,48 @@
+/* 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
A keyboards/handwired/lagrange/info.json => keyboards/handwired/lagrange/info.json +21 -0
@@ 0,0 1,21 @@
+{
+ "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}
+ ]
+ }
+ }
+}
A keyboards/handwired/lagrange/keymaps/default/keymap.c => keyboards/handwired/lagrange/keymaps/default/keymap.c +50 -0
@@ 0,0 1,50 @@
+/* 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
+ ),
+};
A keyboards/handwired/lagrange/keymaps/dpapavas/config.h => keyboards/handwired/lagrange/keymaps/dpapavas/config.h +23 -0
@@ 0,0 1,23 @@
+/* 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
A keyboards/handwired/lagrange/keymaps/dpapavas/keymap.c => keyboards/handwired/lagrange/keymaps/dpapavas/keymap.c +202 -0
@@ 0,0 1,202 @@
+/* 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);
+ }
+}
A keyboards/handwired/lagrange/keymaps/dpapavas/rules.mk => keyboards/handwired/lagrange/keymaps/dpapavas/rules.mk +4 -0
@@ 0,0 1,4 @@
+# Enable additional features.
+
+DEBOUNCE_TYPE = sym_defer_pk
+TAP_DANCE_ENABLE = yes
A keyboards/handwired/lagrange/lagrange.c => keyboards/handwired/lagrange/lagrange.c +59 -0
@@ 0,0 1,59 @@
+/* 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();
+}
A keyboards/handwired/lagrange/lagrange.h => keyboards/handwired/lagrange/lagrange.h +53 -0
@@ 0,0 1,53 @@
+/* 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} \
+ }
A keyboards/handwired/lagrange/readme.md => keyboards/handwired/lagrange/readme.md +21 -0
@@ 0,0 1,21 @@
+# Lagrange
+
+An ergonomic, split, concave keyboard, with convex thumb pads. See the [project page](https://github.com/dpapavas/lagrange-keyboard) for more info.
+
+
+
+* 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).
A keyboards/handwired/lagrange/rules.mk => keyboards/handwired/lagrange/rules.mk +27 -0
@@ 0,0 1,27 @@
+# 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
A keyboards/handwired/lagrange/transport.c => keyboards/handwired/lagrange/transport.c +175 -0
@@ 0,0 1,175 @@
+/* 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);
+}