[beken-72xx] Implement WiFi powersave (#111)

* Rebase

* Clang-format

cores/beken-72xx/arduino/libraries/WiFi/WiFiGeneric.cpp

@@ -84,3 +84,20 @@ IPAddress WiFiClass::hostByName(const char *hostname) {
 	}
 	return IPAddress();
 }
+
+bool WiFiClass::setSleep(bool enable) {
+	LT_DM(WIFI, "WiFi sleep mode %u", enable);
+	if (enable) {
+		// Replicating OpenBeken PowerSave feature
+		// https://github.com/openshwprojects/OpenBK7231T_App/blob/567c5756b489f0670988fad1c2742a19f0f217ea/src/cmnds/cmd_main.c#L58
+		bk_wlan_power_save_set_level((BK_PS_LEVEL)(PS_RF_SLEEP_BIT | PS_MCU_SLEEP_BIT));
+	} else {
+		bk_wlan_power_save_set_level((BK_PS_LEVEL)0);
+	}
+	data.sleep = enable;
+	return true;
+}
+
+bool WiFiClass::getSleep() {
+	return data.sleep;
+}

cores/beken-72xx/arduino/libraries/WiFi/WiFiPrivate.h

@@ -31,6 +31,7 @@ extern "C" {
 extern void func_init_extended();
 extern void app_pre_start();
 extern void bk_wlan_ap_init(network_InitTypeDef_st *inNetworkInitPara);
+extern int bk_wlan_power_save_set_level(BK_PS_LEVEL level);
 
 // func/hostapd-2.5/wpa_supplicant/main_supplicant.c
 extern struct wpa_ssid_value *wpas_connect_ssid;
@@ -64,6 +65,7 @@ typedef struct {
 	rw_evt_type lastStaEvent;
 	rw_evt_type lastApEvent;
 	bool apEnabled;
+	bool sleep;
 } WiFiData;
 
 #define DATA  ((WiFiData *)data)