[Keyboard] add ProjectCain Relic (#15577)

* Adding relic keyboard

* Update keyboards/projectcain/relic/relic.c

* Update keyboards/projectcain/relic/relic.c

* Update keyboards/projectcain/relic/rules.mk

* Update keyboards/projectcain/relic/rules.mk

* Update keyboards/projectcain/relic/rules.mk

* Update config.h

* Update config.h

* Update keyboards/projectcain/relic/rules.mk

* Update keyboards/projectcain/relic/readme.md

* Update keyboards/projectcain/relic/info.json

* Update keyboards/projectcain/relic/config.h

* Update keyboards/projectcain/relic/config.h

1 files changed, 37 insertions, 0 deletions

diff --git a/keyboards/projectcain/relic/relic.c b/keyboards/projectcain/relic/relic.c
new file mode 100644
index 0000000000..f72250847d
--- /dev/null
+++ b/keyboards/projectcain/relic/relic.c
@@ -0,0 +1,37 @@
+/* Copyright 2021 projectcain
+ *
+ * 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 2 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include "relic.h"
+
+#ifdef ENCODER_ENABLE
+bool encoder_update_kb(uint8_t index, bool clockwise) {
+    if (!encoder_update_user(index, clockwise)) { return false; }
+    if (index == 0) { /* First encoder */
+        if (clockwise) {
+            tap_code(KC_PGDN);
+        } else {
+            tap_code(KC_PGUP);
+        }
+    } else if (index == 1) { /* Second encoder */
+        if (clockwise) {
+            tap_code(KC_DOWN);
+        } else {
+            tap_code(KC_UP);
+        }
+    }
+    return true;
+}
+#endif