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/**
******************************************************************************
* @file usbh_pipes.c
* @author MCD Application Team
* @brief This file implements functions for opening and closing Pipes
******************************************************************************
* @attention
*
* Copyright (c) 2015 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "usbh_pipes.h"
/** @addtogroup USBH_LIB
* @{
*/
/** @addtogroup USBH_LIB_CORE
* @{
*/
/** @defgroup USBH_PIPES
* @brief This file includes opening and closing Pipes
* @{
*/
/** @defgroup USBH_PIPES_Private_Defines
* @{
*/
/**
* @}
*/
/** @defgroup USBH_PIPES_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @defgroup USBH_PIPES_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup USBH_PIPES_Private_Variables
* @{
*/
/**
* @}
*/
/** @defgroup USBH_PIPES_Private_Functions
* @{
*/
static uint16_t USBH_GetFreePipe(USBH_HandleTypeDef *phost);
/**
* @brief USBH_Open_Pipe
* Open a pipe
* @param phost: Host Handle
* @param pipe_num: Pipe Number
* @param dev_address: USB Device address allocated to attached device
* @param speed : USB device speed (Full/Low)
* @param ep_type: end point type (Bulk/int/ctl)
* @param mps: max pkt size
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_OpenPipe(USBH_HandleTypeDef *phost, uint8_t pipe_num,
uint8_t epnum, uint8_t dev_address,
uint8_t speed, uint8_t ep_type, uint16_t mps)
{
(void)USBH_LL_OpenPipe(phost, pipe_num, epnum, dev_address, speed, ep_type, mps);
return USBH_OK;
}
/**
* @brief USBH_ClosePipe
* Close a pipe
* @param phost: Host Handle
* @param pipe_num: Pipe Number
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_ClosePipe(USBH_HandleTypeDef *phost, uint8_t pipe_num)
{
(void)USBH_LL_ClosePipe(phost, pipe_num);
return USBH_OK;
}
/**
* @brief USBH_Alloc_Pipe
* Allocate a new Pipe
* @param phost: Host Handle
* @param ep_addr: End point for which the Pipe to be allocated
* @retval Pipe number
*/
uint8_t USBH_AllocPipe(USBH_HandleTypeDef *phost, uint8_t ep_addr)
{
uint16_t pipe;
pipe = USBH_GetFreePipe(phost);
if (pipe != 0xFFFFU)
{
phost->Pipes[pipe & 0xFU] = (uint32_t)(0x8000U | ep_addr);
}
return (uint8_t)pipe;
}
/**
* @brief USBH_Free_Pipe
* Free the USB Pipe
* @param phost: Host Handle
* @param idx: Pipe number to be freed
* @retval USBH Status
*/
USBH_StatusTypeDef USBH_FreePipe(USBH_HandleTypeDef *phost, uint8_t idx)
{
if (idx < USBH_MAX_PIPES_NBR)
{
phost->Pipes[idx] &= 0x7FFFU;
}
return USBH_OK;
}
/**
* @brief USBH_GetFreePipe
* @param phost: Host Handle
* Get a free Pipe number for allocation to a device endpoint
* @retval idx: Free Pipe number
*/
static uint16_t USBH_GetFreePipe(USBH_HandleTypeDef *phost)
{
uint8_t idx = 0U;
for (idx = 0U; idx < USBH_MAX_PIPES_NBR; idx++)
{
if ((phost->Pipes[idx] & 0x8000U) == 0U)
{
return (uint16_t)idx;
}
}
return 0xFFFFU;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/