modem sleep: add wifi power save callback to idle task

components/esp32/include/esp_wifi_internal.h

@@ -105,6 +105,15 @@ esp_err_t esp_wifi_internal_reg_rxcb(wifi_interface_t ifx, wifi_rxcb_t fn);
   */
 esp_err_t esp_wifi_internal_set_sta_ip(void);
 
+/**
+  * @brief     The WiFi power save callback function
+  *
+  * @param     none
+  *
+  * @return    none
+  */
+void esp_wifi_ps_idle_cb(void);
+
 #ifdef __cplusplus
 }
 #endif

components/esp32/task_wdt.c

@@ -29,6 +29,7 @@
 #include "soc/timer_group_struct.h"
 #include "soc/timer_group_reg.h"
 #include "esp_log.h"
+#include "esp_wifi_internal.h"
 
 #include "esp_task_wdt.h"
 
@@ -167,6 +168,7 @@ void vApplicationIdleHook(void) {
     if (xPortGetCoreID()!=0) return;
 #endif
     esp_task_wdt_feed();
+    esp_wifi_ps_idle_cb();
 }
 #endif
 

components/freertos/tasks.c

@@ -113,7 +113,7 @@ functions but without including stdio.h here. */
 /*
  * Defines the size, in words, of the stack allocated to the idle task.
  */
-#define tskIDLE_STACK_SIZE	configMINIMAL_STACK_SIZE
+#define tskIDLE_STACK_SIZE	2048//configMINIMAL_STACK_SIZE
 
 #if( configUSE_PREEMPTION == 0 )
 	/* If the cooperative scheduler is being used then a yield should not be