diff --git a/Core/Src/main.c b/Core/Src/main.c
index d69f104..dd29a84 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -153,11 +153,11 @@ void SystemClock_Config(void)
   /** Initializes the RCC Oscillators according to the specified parameters
   * in the RCC_OscInitTypeDef structure.
   */
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE|RCC_OSCILLATORTYPE_LSE;
   RCC_OscInitStruct.HSEState = RCC_HSE_ON;
   RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
+  RCC_OscInitStruct.LSEState = RCC_LSE_ON;
   RCC_OscInitStruct.HSIState = RCC_HSI_ON;
-  RCC_OscInitStruct.LSIState = RCC_LSI_ON;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
   RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
@@ -180,7 +180,7 @@ void SystemClock_Config(void)
     Error_Handler();
   }
   PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_RTC;
-  PeriphClkInit.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
+  PeriphClkInit.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
   if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
   {
     Error_Handler();
diff --git a/hahha.ioc b/hahha.ioc
index de91e90..58fb935 100644
--- a/hahha.ioc
+++ b/hahha.ioc
@@ -276,12 +276,14 @@ RCC.FamilyName=M
 RCC.HCLKFreq_Value=72000000
 RCC.I2S2Freq_Value=72000000
 RCC.I2S3Freq_Value=72000000
-RCC.IPParameters=ADCFreqValue,AHBFreq_Value,APB1CLKDivider,APB1Freq_Value,APB1TimFreq_Value,APB2Freq_Value,APB2TimFreq_Value,FCLKCortexFreq_Value,FamilyName,HCLKFreq_Value,I2S2Freq_Value,I2S3Freq_Value,MCOFreq_Value,PLLCLKFreq_Value,PLLMCOFreq_Value,PLLMUL,PLLSourceVirtual,SDIOFreq_Value,SDIOHCLKDiv2FreqValue,SYSCLKFreq_VALUE,SYSCLKSource,TimSysFreq_Value,USBFreq_Value,VCOOutput2Freq_Value
+RCC.IPParameters=ADCFreqValue,AHBFreq_Value,APB1CLKDivider,APB1Freq_Value,APB1TimFreq_Value,APB2Freq_Value,APB2TimFreq_Value,FCLKCortexFreq_Value,FamilyName,HCLKFreq_Value,I2S2Freq_Value,I2S3Freq_Value,MCOFreq_Value,PLLCLKFreq_Value,PLLMCOFreq_Value,PLLMUL,PLLSourceVirtual,RTCClockSelection,RTCFreq_Value,SDIOFreq_Value,SDIOHCLKDiv2FreqValue,SYSCLKFreq_VALUE,SYSCLKSource,TimSysFreq_Value,USBFreq_Value,VCOOutput2Freq_Value
 RCC.MCOFreq_Value=72000000
 RCC.PLLCLKFreq_Value=72000000
 RCC.PLLMCOFreq_Value=36000000
 RCC.PLLMUL=RCC_PLL_MUL9
 RCC.PLLSourceVirtual=RCC_PLLSOURCE_HSE
+RCC.RTCClockSelection=RCC_RTCCLKSOURCE_LSE
+RCC.RTCFreq_Value=32768
 RCC.SDIOFreq_Value=72000000
 RCC.SDIOHCLKDiv2FreqValue=36000000
 RCC.SYSCLKFreq_VALUE=72000000