[Keyboard] Lagrange handwired keyboard (#11374)

* [Keyboard] Add the Lagrange keyboard

* Covert the master side to use the SPI driver.

3 files changed, 229 insertions, 0 deletions

diff --git a/keyboards/handwired/lagrange/keymaps/dpapavas/config.h b/keyboards/handwired/lagrange/keymaps/dpapavas/config.h
new file mode 100644
index 0000000000..049ba598a9
--- /dev/null
+++ b/keyboards/handwired/lagrange/keymaps/dpapavas/config.h
@@ -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
diff --git a/keyboards/handwired/lagrange/keymaps/dpapavas/keymap.c b/keyboards/handwired/lagrange/keymaps/dpapavas/keymap.c
new file mode 100644
index 0000000000..bbcb83913f
--- /dev/null
+++ b/keyboards/handwired/lagrange/keymaps/dpapavas/keymap.c
@@ -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);
+    }
+}
diff --git a/keyboards/handwired/lagrange/keymaps/dpapavas/rules.mk b/keyboards/handwired/lagrange/keymaps/dpapavas/rules.mk
new file mode 100644
index 0000000000..42f42f627a
--- /dev/null
+++ b/keyboards/handwired/lagrange/keymaps/dpapavas/rules.mk
@@ -0,0 +1,4 @@
+# Enable additional features.
+
+DEBOUNCE_TYPE = sym_defer_pk
+TAP_DANCE_ENABLE = yes