qmk_firmware/keyboards/gh60/keymaps/sethbc/keymap.c

#include "gh60.h"
#include "action_layer.h"

#define MODS_CTRL_MASK  (MOD_BIT(KC_LSHIFT)|MOD_BIT(KC_RSHIFT))


const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    /* 0: qwerty */
  KEYMAP_HHKB(
	      FN0, 1,   2,   3,   4,   5,   6,   7,   8,   9,   0,   MINS,EQL, BSLS, GRV,  \
        TAB, Q,   W,   E,   R,   T,   Y,   U,   I,   O,   P,   LBRC,RBRC,BSPC, \
        LCTL,A,   S,   D,   F,   G,   H,   J,   K,   L,   SCLN,QUOT,ENT,  \
        LSFT, Z,   X,   C,   V,   B,   N,   M,   COMM,DOT, SLSH,RSFT, FN1, \
        LCTL,LALT,LGUI,          SPC,                RGUI,RALT,APP, RCTL),
    /* 1: fn */
	KEYMAP_HHKB(
        GRV, F1,  F2,  F3,  F4,  F5,  F6,  F7,  F8,  F9,  F10, F11, F12, TRNS, TRNS, \
        CAPS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,UP,TRNS,TRNS, \
        TRNS,VOLD,VOLU,MUTE,TRNS,TRNS,PAST,PSLS,HOME,PGUP,LEFT,RIGHT,PENT, \
        TRNS,TRNS,TRNS,TRNS,TRNS,TRNS,PPLS,PMNS,END,PGDN,DOWN,TRNS,TRNS, \
        TRNS,TRNS,TRNS,          TRNS,               TRNS,TRNS,TRNS,TRNS),
};

enum function_id {
    SHIFT_ESC,
};

const uint16_t PROGMEM fn_actions[] = {
    [0] = ACTION_FUNCTION(SHIFT_ESC),
    [1] = ACTION_LAYER_MOMENTARY(1),  // to Fn overlay
};

const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
{
  // MACRODOWN only works in this function
      switch(id) {
        case 0:
          if (record->event.pressed) {
            register_code(KC_RSFT);
          } else {
            unregister_code(KC_RSFT);
          }
        break;
      }
    return MACRO_NONE;
};

void matrix_scan_user(void) {

}

void action_function(keyrecord_t *record, uint8_t id, uint8_t opt) {
  static uint8_t shift_esc_shift_mask;
  switch (id) {
    case SHIFT_ESC:
      shift_esc_shift_mask = get_mods()&MODS_CTRL_MASK;
      if (record->event.pressed) {
        if (shift_esc_shift_mask) {
          add_key(KC_GRV);
          send_keyboard_report();
        } else {
          add_key(KC_ESC);
          send_keyboard_report();
        }
      } else {
        if (shift_esc_shift_mask) {
          del_key(KC_GRV);
          send_keyboard_report();
        } else {
          del_key(KC_ESC);
          send_keyboard_report();
        }
      }
      break;
  }
}