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diff --git a/keyboards/handwired/datahand/keymaps/default/keymap.c b/keyboards/handwired/datahand/keymaps/default/keymap.c
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+++ b/keyboards/handwired/datahand/keymaps/default/keymap.c
@@ -0,0 +1,313 @@
+/* Copyright 2017-2019 Nikolaus Wittenstein <nikolaus.wittenstein@gmail.com>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include QMK_KEYBOARD_H
+
+#include <stdbool.h>
+
+/* Datahand features not supported:
+ * * All online reprogramming (user settings using the reset button).
+ * * Program Selection features.
+ * * Macros.
+ * * Direct substitutions.
+ * * L/R Modf.
+ * * Mouse Click Lock (Function Direct Access + Mouse Button key).
+ * * Different mouse movement speeds with the two pointer fingers, and using both pointer fingers to move even faster.
+ *
+ * As far as I know, everything else works.
+ */
+
+enum layer {
+ NORMAL,
+#ifdef DATAHAND_THUMB_RETURN_COMMAND
+ NORMAL_THUMB_RETURN_COMMAND,
+#endif
+ FUNCTION_MOUSE,
+ FUNCTION_ARROWS,
+ NAS,
+ NAS_NUMLOCK,
+ NAS_TENKEY,
+ NAS_TENKEY_NUMLOCK,
+
+ NUM_LAYERS
+};
+
+enum custom_keycodes {
+ N = SAFE_RANGE, /* Normal */
+ NS, /* NAS */
+ NSL, /* NAS Lock */
+ NLK, /* Numlock */
+ FN, /* Function mode - needs to be able to switch to mouse or arrow layer */
+ TK0, /* Ten-key off button */
+ TK1, /* Ten-key on button */
+ AR, /* FN arrow mode */
+ MS, /* FN mouse mode */
+ DZ, /* Double zero button */
+};
+
+static bool mouse_enabled = true;
+static bool tenkey_enabled = false;
+static bool numlock_enabled = false;
+static bool nas_locked = false;
+
+/* Declared weak so that it can easily be overridden. */
+__attribute__((weak)) const uint16_t PROGMEM keymaps[NUM_LAYERS][MATRIX_ROWS][MATRIX_COLS] = {
+[NORMAL] = LAYOUT(
+ KC_Q, KC_W, KC_E, KC_R, KC_U, KC_I, KC_O, KC_P,
+KC_DEL, KC_A, KC_LBRC, KC_ESC, KC_S, KC_B, KC_GRV, KC_D, KC_T, KC_DQT, KC_F, KC_G, KC_H, KC_J, KC_QUOT, KC_Y, KC_K, KC_COLN, KC_N, KC_L, KC_ENT, KC_RBRC, KC_SCLN, KC_BSLS,
+ KC_Z, KC_X, KC_C, KC_V, KC_M, KC_COMM, KC_DOT, KC_SLSH,
+ KC_ENT, KC_TAB, KC_BSPC, KC_SPC,
+ KC_LSFT, NS,
+ KC_CAPS, NSL,
+ N, KC_LCTL, KC_LALT, FN),
+
+#ifdef DATAHAND_THUMB_RETURN_COMMAND
+[NORMAL_THUMB_RETURN_COMMAND] = LAYOUT(
+ _______, _______, _______, _______, _______, _______, _______, _______,
+_______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______,
+ KC_LCMD, _______, _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______, _______, _______),
+#endif
+
+[FUNCTION_MOUSE] = LAYOUT(
+ KC_F2, KC_F4, KC_F6, KC_MS_U, KC_MS_U, KC_F8, KC_F10, KC_PGUP,
+_______, KC_NO, KC_SLCK, _______, KC_BTN3, NLK, KC_BTN1, MS, KC_BTN2, KC_MS_L, KC_BTN1, KC_MS_R, KC_MS_L, KC_BTN2, KC_MS_R, KC_END, AR, KC_LSFT, KC_INS, KC_9, KC_ENT, KC_F11, KC_0, KC_F12,
+ KC_F1, KC_F3, KC_F5, KC_MS_D, KC_MS_D, KC_F7, KC_F9, KC_PGDN,
+ _______, _______, _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______, _______, _______),
+[FUNCTION_ARROWS] = LAYOUT(
+ _______, _______, _______, KC_UP, KC_UP, _______, _______, _______,
+_______, _______, _______, _______, KC_LCTL, _______, _______, _______, _______, KC_LEFT, KC_HOME, KC_RGHT, KC_LEFT, KC_HOME, KC_RGHT, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, KC_DOWN, KC_DOWN, _______, _______, _______,
+ _______, _______, _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______, _______, _______),
+[NAS] = LAYOUT(
+ KC_EXLM, KC_AT, KC_HASH, KC_DLR, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN,
+_______, KC_1, KC_TILD, _______, KC_2, NLK, KC_LABK, KC_3, KC_RABK, KC_SLSH, KC_4, KC_5, KC_6, KC_7, KC_UNDS, KC_CIRC, KC_8, KC_ENT, KC_SCLN, KC_9, KC_BSLS, TK0, KC_0, TK1,
+ KC_EQL, KC_X, KC_PERC, KC_MINS, KC_PLUS, KC_DOT, KC_SLSH, KC_QUES,
+ _______, _______, _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______, _______, _______),
+[NAS_NUMLOCK] = LAYOUT(
+ _______, _______, _______, _______, _______, KC_PAST, _______, _______,
+_______, KC_KP_1, _______, _______, KC_KP_2, _______, _______, KC_KP_3, _______, KC_PSLS, KC_KP_4, KC_KP_5, KC_KP_6, KC_KP_7, _______, _______, KC_KP_8, _______, _______, KC_KP_9, KC_PENT, _______, KC_KP_0, _______,
+ KC_PEQL, _______, _______, KC_PMNS, KC_PPLS, _______, KC_PDOT, _______,
+ _______, _______, _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______, _______, _______),
+[NAS_TENKEY] = LAYOUT(
+ _______, _______, _______, KC_UP, KC_7, KC_8, KC_9, KC_ASTR,
+_______, KC_QUOT, _______, _______, KC_DLR, _______, _______, KC_AMPR, _______, KC_LEFT, KC_HOME, KC_RGHT, KC_0, KC_4, DZ, KC_PLUS, KC_5, KC_MINS, KC_EQL, KC_6, KC_ENT, _______, KC_DOT, _______,
+ KC_LPRN, KC_RPRN, _______, KC_DOWN, KC_1, KC_2, KC_3, KC_SLSH,
+ _______, _______, _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______, _______, _______),
+[NAS_TENKEY_NUMLOCK] = LAYOUT(
+ _______, _______, _______, _______, KC_KP_7, KC_KP_8, KC_KP_9, KC_PAST,
+_______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_KP_0, KC_KP_4, _______, KC_PPLS, KC_KP_5, KC_PMNS, KC_PEQL, KC_KP_6, KC_PENT, _______, KC_PDOT, _______,
+ _______, _______, _______, _______, KC_KP_1, KC_KP_2, KC_KP_3, KC_PSLS,
+ _______, _______, _______, _______,
+ _______, _______,
+ _______, _______,
+ _______, _______, _______, _______),
+};
+
+static void lock_led_set(bool on, uint8_t led) {
+ if (on) {
+ LED_LOCK_PORT &= ~led;
+ } else {
+ LED_LOCK_PORT |= led;
+ }
+}
+
+static void mode_led_set(uint8_t led) {
+ static const uint8_t ALL_MODE_LEDS = LED_FN | LED_NORMAL | LED_NAS | LED_TENKEY;
+ LED_MODE_PORT |= ALL_MODE_LEDS;
+ LED_MODE_PORT &= ~led;
+}
+
+static void layer_set(bool on, uint8_t layer) {
+ if (on) {
+ layer_on(layer);
+ } else {
+ layer_off(layer);
+ }
+
+ if (layer_state_is(NAS) || layer_state_is(NAS_NUMLOCK) || layer_state_is(NAS_TENKEY) || layer_state_is(NAS_TENKEY_NUMLOCK)) {
+ if (tenkey_enabled) {
+ mode_led_set(LED_NAS | LED_TENKEY);
+ } else {
+ mode_led_set(LED_NAS);
+ }
+ } else if (layer_state_is(FUNCTION_MOUSE) || layer_state_is(FUNCTION_ARROWS)) {
+ mode_led_set(LED_FN);
+ } else if (layer_state_is(NORMAL)) {
+ mode_led_set(LED_NORMAL);
+ }
+}
+
+static void set_normal(void) {
+ layer_move(NORMAL);
+
+#ifdef DATAHAND_THUMB_RETURN_COMMAND
+ layer_set(true, NORMAL_THUMB_RETURN_COMMAND);
+#endif
+
+ /* Then call layer_set to update LEDs. */
+ layer_set(true, NORMAL);
+}
+
+static void set_nas(bool on) {
+ /* Always turn on the base NAS layer so other layers can fall through. */
+ layer_set(on, NAS);
+
+ layer_set(on && numlock_enabled, NAS_NUMLOCK);
+ layer_set(on && tenkey_enabled, NAS_TENKEY);
+ layer_set(on && tenkey_enabled && numlock_enabled, NAS_TENKEY_NUMLOCK);
+}
+
+static void set_tenkey(bool on) {
+ tenkey_enabled = on;
+
+ /* We have to be on the NAS layer in order to be able to toggle TK.
+ * Re-toggle it on so that we move to the right layer (and set the right LED).
+ */
+ set_nas(true);
+}
+
+static void toggle_numlock(void) {
+ numlock_enabled = !numlock_enabled;
+ lock_led_set(numlock_enabled, LED_NUM_LOCK);
+
+ if (layer_state_is(NAS)) {
+ /* If we're already in NAS, re-set it so that we activate the numlock layer. */
+ set_nas(true);
+ }
+}
+
+static void set_function(void) {
+ /* Make sure to turn off NAS if we're entering function */
+ set_nas(false);
+
+ /* Always turn on the mouse layer so the arrow layer can fall through. */
+ layer_set(true, FUNCTION_MOUSE);
+ layer_set(!mouse_enabled, FUNCTION_ARROWS);
+}
+
+static void set_mouse_enabled(bool on) {
+ mouse_enabled = on;
+
+ /* Re-run set_function to set our layers correctly. */
+ set_function();
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+ bool pressed = record->event.pressed;
+
+ switch(keycode) {
+ case N:
+ if (pressed) {
+ set_normal();
+ }
+ break;
+
+ case NS:
+ if (pressed) {
+ nas_locked = false;
+ }
+ set_nas(pressed);
+ break;
+
+ case NSL:
+ if (pressed) {
+ nas_locked = true;
+ set_nas(true);
+ }
+ break;
+
+ case NLK:
+ if (pressed) {
+ toggle_numlock();
+ SEND_STRING(SS_DOWN(X_NUMLOCK));
+ } else {
+ SEND_STRING(SS_UP(X_NUMLOCK));
+ }
+ break;
+
+ case FN:
+ if (pressed) {
+ set_function();
+ }
+ break;
+
+ case TK0:
+ if (pressed) {
+ set_tenkey(false);
+ }
+ break;
+
+ case TK1:
+ if (pressed) {
+ set_tenkey(true);
+ }
+ break;
+
+ case MS:
+ if (pressed) {
+ set_mouse_enabled(true);
+ }
+ break;
+
+ case AR:
+ if (pressed) {
+ set_mouse_enabled(false);
+ }
+ break;
+
+ case DZ:
+ if (pressed) {
+ SEND_STRING(SS_TAP(X_KP_0) SS_TAP(X_KP_0));
+ }
+ break;
+ }
+
+ return true;
+};
+
+void matrix_init_user(void) {
+#ifdef DATAHAND_THUMB_RETURN_COMMAND
+ set_normal();
+#endif
+}
+
+void matrix_scan_user(void) {
+
+}
+
+void led_set_user(uint8_t usb_led) {
+ lock_led_set(usb_led & (1<<USB_LED_NUM_LOCK), LED_NUM_LOCK);
+ lock_led_set(usb_led & (1<<USB_LED_CAPS_LOCK), LED_CAPS_LOCK);
+ lock_led_set(usb_led & (1<<USB_LED_SCROLL_LOCK), LED_SCROLL_LOCK);
+}
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