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/**
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/**
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  ******************************************************************************
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  ******************************************************************************
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  * @file    stm32f1xx_ll_usb.c
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  * @file    stm32f1xx_ll_usb.c
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  * @author  MCD Application Team
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  * @author  MCD Application Team
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  * @version V1.0.1
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  * @version V1.0.4
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  * @date    31-July-2015
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  * @date    29-April-2016
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  * @brief   USB Low Layer HAL module driver.
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  * @brief   USB Low Layer HAL module driver.
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  *
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  *
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  *          This file provides firmware functions to manage the following
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  *          This file provides firmware functions to manage the following
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  *          functionalities of the USB Peripheral Controller:
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  *          functionalities of the USB Peripheral Controller:
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  *           + Initialization/de-initialization functions
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  *           + Initialization/de-initialization functions
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  @endverbatim
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  @endverbatim
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  ******************************************************************************
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  ******************************************************************************
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  * @attention
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  * @attention
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  *
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  *
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  * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
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  * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
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  *
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  *
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  * Redistribution and use in source and binary forms, with or without modification,
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  * Redistribution and use in source and binary forms, with or without modification,
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  * are permitted provided that the following conditions are met:
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  * are permitted provided that the following conditions are met:
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  *   1. Redistributions of source code must retain the above copyright notice,
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  *   1. Redistributions of source code must retain the above copyright notice,
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  *      this list of conditions and the following disclaimer.
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  *      this list of conditions and the following disclaimer.
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    USBx->DIEPTXF[index] = 0;
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    USBx->DIEPTXF[index] = 0;
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  }
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  }
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  /*Activate VBUS Sensing B */
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  /*Activate VBUS Sensing B */
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  USBx->GCCFG |= USB_OTG_GCCFG_VBUSBSEN;
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  USBx->GCCFG |= USB_OTG_GCCFG_VBUSBSEN;
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 - 
 
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  if (cfg.vbus_sensing_enable == 0)
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  {
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    USBx->GCCFG |= USB_OTG_GCCFG_NOVBUSSENS;
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  }
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  /* Restart the Phy Clock */
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  /* Restart the Phy Clock */
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  USBx_PCGCCTL = 0;
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  USBx_PCGCCTL = 0;
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  /* Device mode configuration */
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  /* Device mode configuration */
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  USBx_DEVICE->DCFG |= DCFG_FRAME_INTERVAL_80;
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  USBx_DEVICE->DCFG |= DCFG_FRAME_INTERVAL_80;
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  USBx_PCGCCTL = 0;
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  USBx_PCGCCTL = 0;
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  /* no VBUS sensing*/
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  /* no VBUS sensing*/
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  USBx->GCCFG &=~ (USB_OTG_GCCFG_VBUSASEN);
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  USBx->GCCFG &=~ (USB_OTG_GCCFG_VBUSASEN);
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  USBx->GCCFG &=~ (USB_OTG_GCCFG_VBUSBSEN);
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  USBx->GCCFG &=~ (USB_OTG_GCCFG_VBUSBSEN);
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  USBx->GCCFG |= USB_OTG_GCCFG_NOVBUSSENS;
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  /* Disable the FS/LS support mode only */
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  /* Disable the FS/LS support mode only */
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  if((cfg.speed == USB_OTG_SPEED_FULL)&&
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  if((cfg.speed == USB_OTG_SPEED_FULL)&&
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     (USBx != USB_OTG_FS))
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     (USBx != USB_OTG_FS))
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  {
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  {