diff --git a/RealOne/Core/Src/main.c b/RealOne/Core/Src/main.c
index 0550151..aac84af 100644
--- a/RealOne/Core/Src/main.c
+++ b/RealOne/Core/Src/main.c
@@ -17,20 +17,20 @@ volatile uint32_t msTicks = 0;
 volatile uint8_t expe = 0;
 volatile uint8_t blue_mode = 0;
 
-void SysTick_Handler()
+void SysTick_Handler()	//occurs every 10ms
 {
-	if	( BLUE_BUTTON() ){
+	if	( BLUE_BUTTON() ){	//switch to blue mode if blue button was pressed
 		blue_mode = 1 ;
 	}
 
-	msTicks++;                                                /* See startup file startup_LPC17xx.s for SysTick vector */
-	if (msTicks == 5 * expe){
+	msTicks++;					//increment time counter
+	if (msTicks == 5 * expe){	//turn off led after 50ms*expe
 		LED_GREEN(0);
-	}else if(msTicks >= 200){
+	}else if(msTicks >= 200){	//turn on led every 2 seconds
 		msTicks = 0;
 		LED_GREEN(1);
 	}
-	if(expe == 2 || expe == 4){
+	if(expe == 2 || expe == 4){	//output a 50Hz clock on PC10 to evaluate frequency stability for expe 2 & 4
 		CLK_TOGGLE();
 	}
 }
@@ -50,8 +50,8 @@ int main(void)
 		LL_PWR_EnableBkUpAccess();
 
 		//expe = register RTC
-		expe = RTC->BKP0R;
-		if (expe == 0) {
+		expe = RTC->BKP0R;		//Load expe number from backup register
+		if (expe == 0) {		//if cold start : setup clock, LSE & set expe to 1
 			SystemClock_Config_24M_LSE();
 			expe = 1;
 			LL_APB1_GRP1_EnableClock( LL_APB1_GRP1_PERIPH_PWR );
@@ -59,11 +59,11 @@ int main(void)
 			RTC->BKP0R = expe;
 		}
 
-		if (BLUE_BUTTON()){
+		if (BLUE_BUTTON()){	//if blue_button is pressed at reset, switch to next expe
 
 			expe ++;
 			blue_mode = 0;
-			if (expe > 8) expe = 1;
+			if (expe > 8) expe = 1;	//rollover to expe 1
 			RTC->BKP0R = expe;
 		}
 //	}else{
@@ -72,7 +72,6 @@ int main(void)
 	LL_PWR_DisableBkUpAccess();
 	switch(expe){
 	case 1:
-
 		/* Configure the system clock */
 		SystemClock_Config_80M();
 		//Setup Sleep mode
@@ -107,7 +106,7 @@ int main(void)
 	}
 
 
-	// init systick timer (tick period at 1 ms)
+	// init systick timer (tick period at 10 ms)
 	LL_Init1msTick( SystemCoreClock );
 	LL_SYSTICK_EnableIT();
 
@@ -117,7 +116,7 @@ int main(void)
 	while (1)  {
 		if (blue_mode){
 			switch(expe){
-			case 5:
+			case 5:											//cases 5-7 : start stop mode, and reconfigure at wakeup
 			case 6:
 			case 7:
 				LL_LPM_EnableDeepSleep();
@@ -130,7 +129,7 @@ int main(void)
 				LL_SYSTICK_EnableIT();
 				break;
 			case 8:
-				LL_LPM_EnableDeepSleep();
+				LL_LPM_EnableDeepSleep();					//case 8 : shutdown (wakeup=>reset)
 				RTC_wakeup_init_from_standby_or_shutdown(10);
 			case 1:
 			case 3:
@@ -138,18 +137,22 @@ int main(void)
 				break;
 			case 2:
 			case 4:
-				LL_RCC_MSI_EnablePLLMode();
+				LL_RCC_MSI_EnablePLLMode();					//case 4 : enable MSI calibration
 				break;
 			}
 		}else{
-				if (expe > 4) {
+				if (expe > 4) {								//expe 5-8 : sleep as normal mode
 					LL_LPM_EnableSleep();
 					__WFI();
 				}
 		}
 	}
 }
-
+/**
+ * @brief System Clock Configuration
+ * @retval None
+ * 24Mhz + RTC + LSE + Flash latency 3 + Voltage scaling 2
+ */
 void SystemClock_Config_24M_LSE_FL3_VS2(void){
 	LL_APB1_GRP1_EnableClock( LL_APB1_GRP1_PERIPH_PWR );
 	LL_FLASH_SetLatency(LL_FLASH_LATENCY_3);
@@ -205,12 +208,6 @@ void SystemClock_Config_24M_LSE_FL3_VS2(void){
 	LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
 	LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
 	LL_SetSystemCoreClock(24000000);
-
-	/* Update the time base */
-	if (HAL_InitTick (TICK_INT_PRIORITY) != HAL_OK)
-	{
-		//    Error_Handler();
-	}
 }
 
 /**
@@ -274,15 +271,13 @@ void SystemClock_Config_24M_LSE(void)
 	LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
 	LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
 	LL_SetSystemCoreClock(24000000);
-
-	/* Update the time base */
-	if (HAL_InitTick (TICK_INT_PRIORITY) != HAL_OK)
-	{
-		//    Error_Handler();
-	}
 }
 
-
+/**
+ * @brief System Clock Configuration
+ * @retval None
+ * 80MHz using PLL,default flash latency and voltage scaling
+ */
 void SystemClock_Config_80M(void)
 {
 	LL_FLASH_SetLatency(LL_FLASH_LATENCY_4);
@@ -320,12 +315,6 @@ void SystemClock_Config_80M(void)
 	LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
 	LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
 	LL_SetSystemCoreClock(80000000);
-
-	/* Update the time base */
-	if (HAL_InitTick (TICK_INT_PRIORITY) != HAL_OK)
-	{
-		//    Error_Handler();
-	}
 }
 
 // partie commune a toutes les utilisations du wakeup timer
diff --git a/formulaire_resultats_LoPoSo.pdf b/formulaire_resultats_LoPoSo.pdf
index 10a0acc..6aa3f3f 100644
Binary files a/formulaire_resultats_LoPoSo.pdf and b/formulaire_resultats_LoPoSo.pdf differ