diff --git a/Inc/stm32f3xx_hal_pcd.h b/Inc/stm32f3xx_hal_pcd.h
index 2690c17..f037fc7 100644
--- a/Inc/stm32f3xx_hal_pcd.h
+++ b/Inc/stm32f3xx_hal_pcd.h
@@ -340,6 +340,7 @@
 HAL_StatusTypeDef HAL_PCD_EP_SetStall(PCD_HandleTypeDef *hpcd, uint8_t ep_addr);
 HAL_StatusTypeDef HAL_PCD_EP_ClrStall(PCD_HandleTypeDef *hpcd, uint8_t ep_addr);
 HAL_StatusTypeDef HAL_PCD_EP_Flush(PCD_HandleTypeDef *hpcd, uint8_t ep_addr);
+HAL_StatusTypeDef HAL_PCD_EP_Abort(PCD_HandleTypeDef *hpcd, uint8_t ep_addr);
 HAL_StatusTypeDef HAL_PCD_ActivateRemoteWakeup(PCD_HandleTypeDef *hpcd);
 HAL_StatusTypeDef HAL_PCD_DeActivateRemoteWakeup(PCD_HandleTypeDef *hpcd);
 
diff --git a/Inc/stm32f3xx_ll_usb.h b/Inc/stm32f3xx_ll_usb.h
index f3e78c0..6fc0ae7 100644
--- a/Inc/stm32f3xx_ll_usb.h
+++ b/Inc/stm32f3xx_ll_usb.h
@@ -74,6 +74,8 @@
   uint32_t lpm_enable;              /*!< Enable or disable Battery charging.                                    */
 
   uint32_t battery_charging_enable; /*!< Enable or disable Battery charging.                                    */
+
+  uint32_t dma_enable;              /*!< dma_enable state unused, DMA not supported by FS instance              */
 } USB_CfgTypeDef;
 
 typedef struct
@@ -205,6 +207,7 @@
 HAL_StatusTypeDef USB_EPStartXfer(USB_TypeDef *USBx, USB_EPTypeDef *ep);
 HAL_StatusTypeDef USB_EPSetStall(USB_TypeDef *USBx, USB_EPTypeDef *ep);
 HAL_StatusTypeDef USB_EPClearStall(USB_TypeDef *USBx, USB_EPTypeDef *ep);
+HAL_StatusTypeDef USB_EPStopXfer(USB_TypeDef *USBx, USB_EPTypeDef *ep);
 #endif /* defined (HAL_PCD_MODULE_ENABLED) */
 
 HAL_StatusTypeDef USB_SetDevAddress(USB_TypeDef *USBx, uint8_t address);
diff --git a/Src/stm32f3xx_hal_pcd.c b/Src/stm32f3xx_hal_pcd.c
index 912a096..45ddd4c 100644
--- a/Src/stm32f3xx_hal_pcd.c
+++ b/Src/stm32f3xx_hal_pcd.c
@@ -165,6 +165,9 @@
 
   hpcd->State = HAL_PCD_STATE_BUSY;
 
+  /* DMA Not supported for FS instance, Force to Zero */
+  hpcd->Init.dma_enable = 0U;
+
   /* Disable the Interrupts */
   __HAL_PCD_DISABLE(hpcd);
 
@@ -1418,6 +1421,32 @@
 }
 
 /**
+   * @brief  Abort an USB EP transaction.
+   * @param  hpcd PCD handle
+   * @param  ep_addr endpoint address
+   * @retval HAL status
+   */
+HAL_StatusTypeDef HAL_PCD_EP_Abort(PCD_HandleTypeDef *hpcd, uint8_t ep_addr)
+{
+  HAL_StatusTypeDef ret;
+  PCD_EPTypeDef *ep;
+
+  if ((0x80U & ep_addr) == 0x80U)
+  {
+    ep = &hpcd->IN_ep[ep_addr & EP_ADDR_MSK];
+  }
+  else
+  {
+    ep = &hpcd->OUT_ep[ep_addr & EP_ADDR_MSK];
+  }
+
+  /* Stop Xfer */
+  ret = USB_EPStopXfer(hpcd->Instance, ep);
+
+  return ret;
+}
+
+/**
   * @brief  Flush an endpoint
   * @param  hpcd PCD handle
   * @param  ep_addr endpoint address
diff --git a/Src/stm32f3xx_ll_usb.c b/Src/stm32f3xx_ll_usb.c
index 1375766..9c02b66 100644
--- a/Src/stm32f3xx_ll_usb.c
+++ b/Src/stm32f3xx_ll_usb.c
@@ -616,6 +616,51 @@
 
   return HAL_OK;
 }
+
+/**
+   * @brief  USB_EPStoptXfer  Stop transfer on an EP
+   * @param  USBx  usb device instance
+   * @param  ep pointer to endpoint structure
+   * @retval HAL status
+   */
+HAL_StatusTypeDef USB_EPStopXfer(USB_TypeDef *USBx, USB_EPTypeDef *ep)
+{
+  /* IN endpoint */
+  if (ep->is_in == 1U)
+  {
+    if (ep->doublebuffer == 0U)
+    {
+      if (ep->type != EP_TYPE_ISOC)
+      {
+        /* Configure NAK status for the Endpoint */
+        PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_NAK);
+      }
+      else
+      {
+        /* Configure TX Endpoint to disabled state */
+        PCD_SET_EP_TX_STATUS(USBx, ep->num, USB_EP_TX_DIS);
+      }
+    }
+  }
+  else /* OUT endpoint */
+  {
+    if (ep->doublebuffer == 0U)
+    {
+      if (ep->type != EP_TYPE_ISOC)
+      {
+        /* Configure NAK status for the Endpoint */
+        PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_NAK);
+      }
+      else
+      {
+        /* Configure RX Endpoint to disabled state */
+        PCD_SET_EP_RX_STATUS(USBx, ep->num, USB_EP_RX_DIS);
+      }
+    }
+  }
+
+  return HAL_OK;
+}
 #endif /* defined (HAL_PCD_MODULE_ENABLED) */
 
 /**