feat(ble): 使用Zephyr BAS服务替换自定义电池服务实现

- 在prj.conf中启用CONFIG_BT_BAS、CONFIG_BT_DIS和CONFIG_BT_DIS_PNP配置项
- 移除自定义的电池服务实现代码
- 改用zephyr/bluetooth/services/bas.h提供的标准BAS服务API
- 简化电池状态事件处理逻辑，直接调用bt_bas_set_battery_level设置电池级别
- 移除手动GATT通知实现，依赖系统BAS服务自动处理通知功能

prj.conf

@@ -59,6 +59,9 @@ CONFIG_BT_HIDS_ATTR_MAX=40
 CONFIG_BT_HIDS_INPUT_REP_MAX=4
 CONFIG_BT_HIDS_OUTPUT_REP_MAX=3
 CONFIG_BT_HIDS_FEATURE_REP_MAX=0
+CONFIG_BT_BAS=y
+CONFIG_BT_DIS=y
+CONFIG_BT_DIS_PNP=y
 
 CONFIG_USB_DEVICE_STACK_NEXT=y
 CONFIG_USBD_HID_SUPPORT=y

src/modules/ble_battery_module.c

@@ -1,7 +1,4 @@
-#include <errno.h>
-
-#include <zephyr/kernel.h>
-#include <zephyr/bluetooth/gatt.h>
+#include <zephyr/bluetooth/services/bas.h>
 
 #include <app_event_manager.h>
 
@@ -13,50 +10,13 @@
 #include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(MODULE, LOG_LEVEL_INF);
 
-static bool notify_enabled;
-static uint8_t battery_level = 100U;
-
-static void bas_ccc_cfg_changed(const struct bt_gatt_attr *attr, uint16_t value)
-{
-	ARG_UNUSED(attr);
-	notify_enabled = (value == BT_GATT_CCC_NOTIFY);
-}
-
-static ssize_t read_battery_level(struct bt_conn *conn,
-				  const struct bt_gatt_attr *attr,
-				  void *buf,
-				  uint16_t len,
-				  uint16_t offset)
-{
-	const uint8_t *value = attr->user_data;
-
-	return bt_gatt_attr_read(conn, attr, buf, len, offset, value, sizeof(*value));
-}
-
-BT_GATT_SERVICE_DEFINE(ble_battery_svc,
-	BT_GATT_PRIMARY_SERVICE(BT_UUID_BAS),
-	BT_GATT_CHARACTERISTIC(BT_UUID_BAS_BATTERY_LEVEL,
-			       BT_GATT_CHRC_READ | BT_GATT_CHRC_NOTIFY,
-			       BT_GATT_PERM_READ_ENCRYPT,
-			       read_battery_level, NULL, &battery_level),
-	BT_GATT_CCC(bas_ccc_cfg_changed,
-		    BT_GATT_PERM_READ_ENCRYPT | BT_GATT_PERM_WRITE_ENCRYPT),
-);
-
 static bool handle_battery_status_event(const struct battery_status_event *event)
 {
-	battery_level = battery_status_event_get_soc(event);
+	uint8_t battery_level = battery_status_event_get_soc(event);
+	int err = bt_bas_set_battery_level(battery_level);
 
-	if (!notify_enabled) {
-		return false;
-	}
-
-	int err = bt_gatt_notify(NULL, &ble_battery_svc.attrs[1], &battery_level, sizeof(battery_level));
-
-	if (err == -ENOTCONN) {
-		LOG_WRN("BAS notify skipped: peer disconnecting");
-	} else if (err) {
-		LOG_ERR("BAS notify failed: %d", err);
+	if (err) {
+		LOG_ERR("bt_bas_set_battery_level failed: %d", err);
 	}
 
 	return false;