[Keymap] add keymap for meishi2 (qmk#9270)

* add keymap "led_status"

* modified readme

* Update keyboards/meishi2/keymaps/led_status/keymap.c

* I modified the code to be simple.

* Update keyboards/meishi2/keymaps/led_status/keymap.c

keyboards/meishi2/keymaps/led_status/keymap.c

@@ -0,0 +1,36 @@
+/* Copyright 2019 Biacco42
+ *
+ * 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 QMK_KEYBOARD_H
+
+#define PRO_MICRO_LED_TX D5
+#define PRO_MICRO_LED_RX B0
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [0] = LAYOUT( /* Base */
+    LCTL(KC_Z),  LCTL(KC_X),  LCTL(KC_C), LCTL(KC_V)
+  )
+};
+
+void matrix_init_user(void) {
+  setPinOutput(PRO_MICRO_LED_TX);
+  setPinOutput(PRO_MICRO_LED_RX);
+}
+
+bool led_update_user(led_t led_state) {
+  writePin(PRO_MICRO_LED_TX, !led_state.num_lock);
+  writePin(PRO_MICRO_LED_RX, !led_state.caps_lock);
+  return true;
+}

keyboards/meishi2/keymaps/led_status/readme.md

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+# modified keymap for meishi2
+
+The LED on Pro Micro lights up when CAPS LOCK and NUM LOCK are in place.