feat(freertos): Add option for idle task stack size

Modify min size from 768 to 1024 bytes.

components/freertos/Kconfig

@@ -32,6 +32,18 @@ config FREERTOS_MAX_HOOK
     help
         configurate the max number of FreeRTOS hook function.
 
+config FREERTOS_IDLE_TASK_STACKSIZE
+    int "Idle Task stack size"
+    range 1024 32768
+    default 1024
+    help
+        The idle task has its own stack, sized in bytes. The default size is enough for most uses. Size can be reduced
+        to 1024 bytes if no (or simple) FreeRTOS idle hooks are used and pthread local storage or FreeRTOS local storage
+        cleanup callbacks are not used.
+
+        The stack size may need to be increased above the default if the app installs idle or thread local storage
+        cleanup hooks that use a lot of stack memory.
+
 config FREERTOS_ISR_STACKSIZE
     int "ISR stack size"
     range 512 8192

components/freertos/freertos/tasks.c

@@ -1959,7 +1959,7 @@ BaseType_t xReturn;
 		/* The Idle task is being created using dynamically allocated RAM. */
 		xReturn = xTaskCreate(	prvIdleTask,
 								configIDLE_TASK_NAME,
-								configMINIMAL_STACK_SIZE,
+								configIDLE_TASK_STACK_SIZE,
 								( void * ) NULL,
 								( tskIDLE_PRIORITY | portPRIVILEGE_BIT ),
 								&xIdleTaskHandle ); /*lint !e961 MISRA exception, justified as it is not a redundant explicit cast to all supported compilers. */

components/freertos/port/esp8266/include/freertos/FreeRTOSConfig.h

@@ -172,5 +172,9 @@ uint32_t esp_get_time(void);
 
 #define traceINCREASE_TICK_COUNT(_ticks)    esp_increase_tick_cnt(_ticks)
 
+#ifndef configIDLE_TASK_STACK_SIZE
+#define configIDLE_TASK_STACK_SIZE CONFIG_FREERTOS_IDLE_TASK_STACKSIZE
+#endif /* configIDLE_TASK_STACK_SIZE */
+
 #endif /* FREERTOS_CONFIG_H */