added battery.h, last_state_of_charge to uint8_t

app/include/zmk/battery.h

@@ -0,0 +1,9 @@
+/*
+ * Copyright (c) 2021 The ZMK Contributors
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+uint8_t zmk_battery_state_of_charge();

app/include/zmk/events/battery_state_changed.h

@@ -14,6 +14,4 @@ struct zmk_battery_state_changed {
     uint8_t state_of_charge;
 };
 
-int32_t zmk_battery_state_of_charge();
-
 ZMK_EVENT_DECLARE(zmk_battery_state_changed);

app/src/battery.c

@@ -15,13 +15,14 @@
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 
 #include <zmk/event_manager.h>
+#include <zmk/battery.h>
 #include <zmk/events/battery_state_changed.h>
 
 const struct device *battery;
 
-static int32_t last_state_of_charge = 0;
+static uint8_t last_state_of_charge = 0;
 
-int32_t zmk_battery_state_of_charge() { return last_state_of_charge; }
+uint8_t zmk_battery_state_of_charge() { return last_state_of_charge; }
 
 static int zmk_battery_update(const struct device *battery) {
     struct sensor_value state_of_charge;
@@ -43,9 +44,9 @@ static int zmk_battery_update(const struct device *battery) {
     if (last_state_of_charge != state_of_charge.val1) {
         last_state_of_charge = state_of_charge.val1;
 
-        LOG_DBG("Setting BAS GATT battery level to %d.", state_of_charge.val1);
+        LOG_DBG("Setting BAS GATT battery level to %d.", last_state_of_charge);
 
-        rc = bt_bas_set_battery_level(state_of_charge.val1);
+        rc = bt_bas_set_battery_level(last_state_of_charge);
 
         if (rc != 0) {
             LOG_WRN("Failed to set BAS GATT battery level (err %d)", rc);
@@ -53,7 +54,7 @@ static int zmk_battery_update(const struct device *battery) {
         }
 
         rc = ZMK_EVENT_RAISE(new_zmk_battery_state_changed(
-            (struct zmk_battery_state_changed){.state_of_charge = state_of_charge.val1}));
+            (struct zmk_battery_state_changed){.state_of_charge = last_state_of_charge}));
     }
 
     return rc;