diff --git a/Core/Src/freertos.c b/Core/Src/freertos.c
index f18a191..09582b0 100644
--- a/Core/Src/freertos.c
+++ b/Core/Src/freertos.c
@@ -2,7 +2,7 @@
  * @Description: 
  * @Date: 2020-04-02 21:44:31
  * @LastEditors: CK.Zh
- * @LastEditTime: 2020-12-17 18:39:26
+ * @LastEditTime: 2020-12-17 20:08:43
  * @FilePath: \NaviKit_stm32\Core\Src\freertos.c
  */
 /* USER CODE BEGIN Header */
@@ -36,11 +36,11 @@
 #include "iwdg.h"
 #include "gpio.h"
 #include "usart.h"
-//#include "stdio.h"
 #include "navikit.h"
 #include "coulomb.h"
 #include "stdbool.h"
 #include "adc.h"
+#include "i2c.h"
 #include "log.h"
 /* USER CODE END Includes */
 
@@ -115,6 +115,8 @@ const osThreadAttr_t PowerMonitTask_attributes = {
 
 /* Private function prototypes -----------------------------------------------*/
 /* USER CODE BEGIN FunctionPrototypes */
+void osEnterSleepState();
+void osEnterRuningState();
 /* USER CODE END FunctionPrototypes */
 
 void StartDefaultTask(void *argument);
@@ -217,7 +219,7 @@ void MX_FREERTOS_Init(void) {
   LedBlinkTaskHandle = osThreadNew(StartLedBlinkTask, NULL, &LedBlinkTask_attributes);
 
   /* creation of IWDGRefreshTask */
-  IWDGRefreshTaskHandle = osThreadNew(StartIWDGRefreshTask, NULL, &IWDGRefreshTask_attributes);
+  // IWDGRefreshTaskHandle = osThreadNew(StartIWDGRefreshTask, NULL, &IWDGRefreshTask_attributes);
 
   /* creation of EventDetect */
   EventDetectHandle = osThreadNew(StartEventDetect, NULL, &EventDetect_attributes);
@@ -277,7 +279,7 @@ void StartDefaultTask(void *argument)
 
 	Log(info,"Core initial successfully");
 	Log(info,"----------------------------------------------");
-
+	  osEnterSleepState();
   /* Infinite loop */
   for(;;)
   {
@@ -535,6 +537,7 @@ void StartStateSwitchTask(void *argument)
 			  {//only from running state
 			  if((NaviKit.sys.sta == running))// && (NaviKit.som.shutdown_req == true)
 				  enter_shutdown_state();
+			  	  osEnterSleepState();
           }break;
 			  case running:
 			  {//from sleep and shutdown state
@@ -601,7 +604,25 @@ void StartPowerMonitTask(void *argument)
 /* Private application code --------------------------------------------------*/
 /* USER CODE BEGIN Application */
 
-
+//os enter sleep state for save power
+void osEnterSleepState(){
+  Log(info,"EC Enter Sleep State");
+  vTaskSuspendAll();
+  HAL_SuspendTick();
+  HAL_I2C_MspDeInit(&hi2c1);
+  HAL_ADC_MspDeInit(&hadc1);
+  HAL_ADC_Stop_DMA(&hadc1);
+  HAL_PWR_EnableSleepOnExit();//for rtos application,enter sleep after interrupt end
+  HAL_PWR_EnterSLEEPMode(0,PWR_SLEEPENTRY_WFE);
+}
+void osEnterRuningState(){
+  HAL_ResumeTick();
+  HAL_I2C_MspInit(&hi2c1);
+  HAL_ADC_MspInit(&hadc1);
+	HAL_ADC_Start_DMA(&hadc1, (uint32_t*)&(NaviKit.pmb.rails.adc), ADC_CH_COUNT);
+  xTaskResumeAll();
+  Log(info,"EC Enter Runing State");
+}
 //printf redefine
 #ifdef __GNUC__
 //#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
diff --git a/Core/Src/main.c b/Core/Src/main.c
index 5213fd2..26a9551 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -1,3 +1,10 @@
+/*
+ * @Description: 
+ * @Date: 2020-02-20 11:40:37
+ * @LastEditors: CK.Zh
+ * @LastEditTime: 2020-12-17 19:24:44
+ * @FilePath: \NaviKit_stm32\Core\Src\main.c
+ */
 /* USER CODE BEGIN Header */
 /**
   ******************************************************************************
@@ -98,7 +105,7 @@ int main(void)
   MX_GPIO_Init();
   MX_DMA_Init();
   MX_I2C1_Init();
-  MX_IWDG_Init();
+//  MX_IWDG_Init();
   MX_UART4_Init();
   MX_ADC1_Init();
   MX_USART1_UART_Init();
@@ -108,6 +115,7 @@ int main(void)
   MX_NVIC_Init();
   /* USER CODE BEGIN 2 */
 
+  HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);
   /* USER CODE END 2 */
 
   /* Init scheduler */
diff --git a/Core/Src/navikit.c b/Core/Src/navikit.c
index 5ddeb8e..6ce73d9 100644
--- a/Core/Src/navikit.c
+++ b/Core/Src/navikit.c
@@ -34,13 +34,6 @@ void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
 {
 	if(hadc->Instance == ADC1)
 	{
-//		NaviKit.pmb.rails.out_24v  = (float)((NaviKit.pmb.rails.adc[1]*16.0) / 1241.21);
-//		NaviKit.pmb.rails.out_5v    = (float)((NaviKit.pmb.rails.adc[2]*8.0 ) / 1241.21);
-//		NaviKit.pmb.rails.out_12v   = (float)((NaviKit.pmb.rails.adc[3]*8.0 ) / 1241.21);
-//		NaviKit.pmb.rails.bkp_bat   = (float)((NaviKit.pmb.rails.adc[4]*8.0 ) / 1241.21);
-//		NaviKit.pmb.rails.main_pwr = (float)((NaviKit.pmb.rails.adc[5]*16.0) / 1241.21);
-
-
 		float adc_17_voltage = 1.2 / NaviKit.pmb.rails.adc[1];//reference voltage
 
 		NaviKit.pmb.rails.out_24v  = (float)(adc_17_voltage * NaviKit.pmb.rails.adc[2] * 16);