diff --git a/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_hcd.c b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_hcd.c
index 3a23e4be58..284257ec11 100644
--- a/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_hcd.c
+++ b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_hcd.c
@@ -340,8 +340,8 @@ HAL_StatusTypeDef HAL_HCD_HC_SubmitRequest(HCD_HandleTypeDef *hhcd,
                                             uint8_t do_ping)
 {
   // MBED: added
-  if ((hhcd->hc[ch_num].ep_is_in != direction)) {
-    if ((hhcd->hc[ch_num].ep_type == EP_TYPE_CTRL)){
+  if (hhcd->hc[ch_num].ep_is_in != direction) {
+    if (hhcd->hc[ch_num].ep_type == EP_TYPE_CTRL){
       /*  reconfigure the endpoint !!! from tx -> rx, and rx ->tx  */
       USB_OTG_GlobalTypeDef *USBx = hhcd->Instance;
       if (direction)
diff --git a/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_pcd.c b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_pcd.c
index 5e9e291208..a767722bbf 100644
--- a/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_pcd.c
+++ b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_pcd.c
@@ -334,7 +334,7 @@ void HAL_PCD_IRQHandler(PCD_HandleTypeDef *hpcd)
   USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;
   uint32_t i = 0, ep_intr = 0, epint = 0, epnum = 0;
   uint32_t fifoemptymsk = 0, temp = 0;
-  USB_OTG_EPTypeDef *ep = NULL;
+  // USB_OTG_EPTypeDef *ep = NULL;
   uint32_t hclk = 200000000;
 
   /* ensure that we are in device mode */
diff --git a/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_tim.c b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_tim.c
index 9d69d22626..b310d8a961 100644
--- a/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_tim.c
+++ b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_tim.c
@@ -471,11 +471,11 @@ HAL_StatusTypeDef HAL_TIM_Base_Start_DMA(TIM_HandleTypeDef *htim, uint32_t *pDat
   /* Check the parameters */
   assert_param(IS_TIM_DMA_INSTANCE(htim->Instance)); 
   
-  if((htim->State == HAL_TIM_STATE_BUSY))
+  if(htim->State == HAL_TIM_STATE_BUSY)
   {
      return HAL_BUSY;
   }
-  else if((htim->State == HAL_TIM_STATE_READY))
+  else if(htim->State == HAL_TIM_STATE_READY)
   {
     if((pData == 0 ) && (Length > 0)) 
     {
@@ -895,11 +895,11 @@ HAL_StatusTypeDef HAL_TIM_OC_Start_DMA(TIM_HandleTypeDef *htim, uint32_t Channel
   /* Check the parameters */
   assert_param(IS_TIM_CCX_INSTANCE(htim->Instance, Channel));
   
-  if((htim->State == HAL_TIM_STATE_BUSY))
+  if(htim->State == HAL_TIM_STATE_BUSY)
   {
      return HAL_BUSY;
   }
-  else if((htim->State == HAL_TIM_STATE_READY))
+  else if(htim->State == HAL_TIM_STATE_READY)
   {
     if(((uint32_t)pData == 0 ) && (Length > 0)) 
     {
@@ -1435,11 +1435,11 @@ HAL_StatusTypeDef HAL_TIM_PWM_Start_DMA(TIM_HandleTypeDef *htim, uint32_t Channe
   /* Check the parameters */
   assert_param(IS_TIM_CCX_INSTANCE(htim->Instance, Channel));
   
-  if((htim->State == HAL_TIM_STATE_BUSY))
+  if(htim->State == HAL_TIM_STATE_BUSY)
   {
      return HAL_BUSY;
   }
-  else if((htim->State == HAL_TIM_STATE_READY))
+  else if(htim->State == HAL_TIM_STATE_READY)
   {
     if(((uint32_t)pData == 0 ) && (Length > 0)) 
     {
@@ -1949,11 +1949,11 @@ HAL_StatusTypeDef HAL_TIM_IC_Start_DMA(TIM_HandleTypeDef *htim, uint32_t Channel
   assert_param(IS_TIM_CCX_INSTANCE(htim->Instance, Channel));
   assert_param(IS_TIM_DMA_CC_INSTANCE(htim->Instance));
   
-  if((htim->State == HAL_TIM_STATE_BUSY))
+  if(htim->State == HAL_TIM_STATE_BUSY)
   {
      return HAL_BUSY;
   }
-  else if((htim->State == HAL_TIM_STATE_READY))
+  else if(htim->State == HAL_TIM_STATE_READY)
   {
     if((pData == 0 ) && (Length > 0)) 
     {
@@ -2834,11 +2834,11 @@ HAL_StatusTypeDef HAL_TIM_Encoder_Start_DMA(TIM_HandleTypeDef *htim, uint32_t Ch
   /* Check the parameters */
   assert_param(IS_TIM_DMA_CC_INSTANCE(htim->Instance));
   
-  if((htim->State == HAL_TIM_STATE_BUSY))
+  if(htim->State == HAL_TIM_STATE_BUSY)
   {
      return HAL_BUSY;
   }
-  else if((htim->State == HAL_TIM_STATE_READY))
+  else if(htim->State == HAL_TIM_STATE_READY)
   {
     if((((pData1 == 0) || (pData2 == 0) )) && (Length > 0)) 
     {
@@ -3656,11 +3656,11 @@ HAL_StatusTypeDef HAL_TIM_DMABurst_WriteStart(TIM_HandleTypeDef *htim, uint32_t
   assert_param(IS_TIM_DMA_SOURCE(BurstRequestSrc));
   assert_param(IS_TIM_DMA_LENGTH(BurstLength));
   
-  if((htim->State == HAL_TIM_STATE_BUSY))
+  if(htim->State == HAL_TIM_STATE_BUSY)
   {
      return HAL_BUSY;
   }
-  else if((htim->State == HAL_TIM_STATE_READY))
+  else if(htim->State == HAL_TIM_STATE_READY)
   {
     if((BurstBuffer == 0 ) && (BurstLength > 0)) 
     {
@@ -3881,11 +3881,11 @@ HAL_StatusTypeDef HAL_TIM_DMABurst_ReadStart(TIM_HandleTypeDef *htim, uint32_t B
   assert_param(IS_TIM_DMA_SOURCE(BurstRequestSrc));
   assert_param(IS_TIM_DMA_LENGTH(BurstLength));
   
-  if((htim->State == HAL_TIM_STATE_BUSY))
+  if(htim->State == HAL_TIM_STATE_BUSY)
   {
      return HAL_BUSY;
   }
-  else if((htim->State == HAL_TIM_STATE_READY))
+  else if(htim->State == HAL_TIM_STATE_READY)
   {
     if((BurstBuffer == 0 ) && (BurstLength > 0)) 
     {
diff --git a/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_tim_ex.c b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_tim_ex.c
index 4fdcc9ee6a..8b67763c67 100644
--- a/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_tim_ex.c
+++ b/targets/TARGET_STM/TARGET_STM32F7/device/stm32f7xx_hal_tim_ex.c
@@ -423,11 +423,11 @@ HAL_StatusTypeDef HAL_TIMEx_HallSensor_Start_DMA(TIM_HandleTypeDef *htim, uint32
   /* Check the parameters */
   assert_param(IS_TIM_XOR_INSTANCE(htim->Instance));
   
-   if((htim->State == HAL_TIM_STATE_BUSY))
+   if(htim->State == HAL_TIM_STATE_BUSY)
   {
      return HAL_BUSY;
   }
-  else if((htim->State == HAL_TIM_STATE_READY))
+  else if(htim->State == HAL_TIM_STATE_READY)
   {
     if(((uint32_t)pData == 0 ) && (Length > 0)) 
     {
@@ -729,11 +729,11 @@ HAL_StatusTypeDef HAL_TIMEx_OCN_Start_DMA(TIM_HandleTypeDef *htim, uint32_t Chan
   /* Check the parameters */
   assert_param(IS_TIM_CCXN_INSTANCE(htim->Instance, Channel)); 
   
-  if((htim->State == HAL_TIM_STATE_BUSY))
+  if(htim->State == HAL_TIM_STATE_BUSY)
   {
      return HAL_BUSY;
   }
-  else if((htim->State == HAL_TIM_STATE_READY))
+  else if(htim->State == HAL_TIM_STATE_READY)
   {
     if(((uint32_t)pData == 0 ) && (Length > 0)) 
     {
@@ -1145,11 +1145,11 @@ HAL_StatusTypeDef HAL_TIMEx_PWMN_Start_DMA(TIM_HandleTypeDef *htim, uint32_t Cha
   /* Check the parameters */
   assert_param(IS_TIM_CCXN_INSTANCE(htim->Instance, Channel)); 
   
-  if((htim->State == HAL_TIM_STATE_BUSY))
+  if(htim->State == HAL_TIM_STATE_BUSY)
   {
      return HAL_BUSY;
   }
-  else if((htim->State == HAL_TIM_STATE_READY))
+  else if(htim->State == HAL_TIM_STATE_READY)
   {
     if(((uint32_t)pData == 0 ) && (Length > 0)) 
     {
diff --git a/targets/TARGET_STM/TARGET_STM32F7/flash_api.c b/targets/TARGET_STM/TARGET_STM32F7/flash_api.c
index de705096ef..19c0f38b4c 100644
--- a/targets/TARGET_STM/TARGET_STM32F7/flash_api.c
+++ b/targets/TARGET_STM/TARGET_STM32F7/flash_api.c
@@ -281,7 +281,7 @@ static uint32_t GetSectorSize(uint32_t Sector)
   */
 static uint32_t GetSectorBase(uint32_t SectorId)
 {
-    int i = 0;
+    uint32_t i = 0;
     uint32_t address_sector = FLASH_BASE;
 
     for (i = 0; i < SectorId; i++) {