Merge pull request adafruit#9476 from EternityForest/wifi-pm

DRAFT: Add wifi.radio.listen_interval to ESP32-family chips.

Author: tannewt

ports/espressif/common-hal/wifi/Radio.c

@@ -139,6 +139,25 @@ void common_hal_wifi_radio_set_tx_power(wifi_radio_obj_t *self, const mp_float_t
     esp_wifi_set_max_tx_power(tx_power * 4.0f);
 }
 
+mp_int_t common_hal_wifi_radio_get_listen_interval(wifi_radio_obj_t *self) {
+    wifi_config_t *config = &self->sta_config;
+    return config->sta.listen_interval;
+}
+
+void common_hal_wifi_radio_set_listen_interval(wifi_radio_obj_t *self, const mp_int_t listen_interval) {
+    wifi_config_t *config = &self->sta_config;
+    config->sta.listen_interval = listen_interval;
+    if (listen_interval == 1) {
+        esp_wifi_set_ps(WIFI_PS_MIN_MODEM);
+    } else if (listen_interval > 1) {
+        esp_wifi_set_ps(WIFI_PS_MAX_MODEM);
+    } else {
+        esp_wifi_set_ps(WIFI_PS_NONE);
+    }
+
+    esp_wifi_set_config(ESP_IF_WIFI_STA, config);
+}
+
 mp_obj_t common_hal_wifi_radio_get_mac_address_ap(wifi_radio_obj_t *self) {
     uint8_t mac[MAC_ADDRESS_LENGTH];
     esp_wifi_get_mac(ESP_IF_WIFI_AP, mac);

ports/espressif/mpconfigport.mk

@@ -20,6 +20,10 @@ CIRCUITPY_FULL_BUILD ?= 1
 # If SSL is enabled, it's mbedtls
 CIRCUITPY_SSL_MBEDTLS = 1
 
+# Wifi Power Save
+CIRCUITPY_WIFI_RADIO_SETTABLE_LISTEN_INTERVAL = 1
+
+
 # These modules are implemented in ports/<port>/common-hal:
 CIRCUITPY_ALARM ?= 1
 CIRCUITPY_ALARM_TOUCH ?= 0

py/circuitpy_mpconfig.mk

@@ -674,6 +674,9 @@ CFLAGS += -DCIRCUITPY_WEB_WORKFLOW=$(CIRCUITPY_WEB_WORKFLOW)
 CIRCUITPY_WIFI_RADIO_SETTABLE_MAC_ADDRESS?= 1
 CFLAGS += -DCIRCUITPY_WIFI_RADIO_SETTABLE_MAC_ADDRESS=$(CIRCUITPY_WIFI_RADIO_SETTABLE_MAC_ADDRESS)
 
+CIRCUITPY_WIFI_RADIO_SETTABLE_LISTEN_INTERVAL?= 0
+CFLAGS += -DCIRCUITPY_WIFI_RADIO_SETTABLE_LISTEN_INTERVAL=$(CIRCUITPY_WIFI_RADIO_SETTABLE_LISTEN_INTERVAL)
+
 # tinyusb port tailored configuration
 CIRCUITPY_TUSB_MEM_ALIGN ?= 4
 CFLAGS += -DCIRCUITPY_TUSB_MEM_ALIGN=$(CIRCUITPY_TUSB_MEM_ALIGN)

shared-bindings/wifi/Radio.c

@@ -186,6 +186,34 @@ MP_PROPERTY_GETSET(wifi_radio_tx_power_obj,
     (mp_obj_t)&wifi_radio_get_tx_power_obj,
     (mp_obj_t)&wifi_radio_set_tx_power_obj);
 
+//|     listen_interval: int
+//|     """Wifi power save listen interval, in DTIM periods, or 100ms intervals if TWT is supported."""
+static mp_obj_t wifi_radio_get_listen_interval(mp_obj_t self_in) {
+    #if CIRCUITPY_WIFI_RADIO_SETTABLE_LISTEN_INTERVAL
+    wifi_radio_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    return mp_obj_new_int(common_hal_wifi_radio_get_listen_interval(self));
+    #else
+    return mp_obj_new_int(0);
+    #endif
+}
+MP_DEFINE_CONST_FUN_OBJ_1(wifi_radio_get_listen_interval_obj, wifi_radio_get_listen_interval);
+
+static mp_obj_t wifi_radio_set_listen_interval(mp_obj_t self_in, mp_obj_t listen_interval_in) {
+    #if CIRCUITPY_WIFI_RADIO_SETTABLE_LISTEN_INTERVAL
+    mp_int_t listen_interval = mp_obj_get_int(listen_interval_in);
+    wifi_radio_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    common_hal_wifi_radio_set_listen_interval(self, listen_interval);
+    #else
+    mp_raise_NotImplementedError(NULL);
+    #endif
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_2(wifi_radio_set_listen_interval_obj, wifi_radio_set_listen_interval);
+
+MP_PROPERTY_GETSET(wifi_radio_listen_interval_obj,
+    (mp_obj_t)&wifi_radio_get_listen_interval_obj,
+    (mp_obj_t)&wifi_radio_set_listen_interval_obj);
+
 //|     mac_address_ap: ReadableBuffer
 //|     """MAC address for the AP. When the address is altered after interface is started
 //|        the changes would only be reflected once the interface restarts.

shared-bindings/wifi/Radio.h

@@ -75,6 +75,9 @@ extern void common_hal_wifi_radio_set_mac_address_ap(wifi_radio_obj_t *self, con
 extern mp_float_t common_hal_wifi_radio_get_tx_power(wifi_radio_obj_t *self);
 extern void common_hal_wifi_radio_set_tx_power(wifi_radio_obj_t *self, const mp_float_t power);
 
+extern void common_hal_wifi_radio_set_listen_interval(wifi_radio_obj_t *self, const mp_int_t listen_interval);
+extern mp_int_t common_hal_wifi_radio_get_listen_interval(wifi_radio_obj_t *self);
+
 extern mp_obj_t common_hal_wifi_radio_start_scanning_networks(wifi_radio_obj_t *self, uint8_t start_channel, uint8_t stop_channel);
 extern void common_hal_wifi_radio_stop_scanning_networks(wifi_radio_obj_t *self);