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/**
******************************************************************************
* @file usbh_pipes.c
* @author MCD Application Team
* @version V3.0.0
* @date 18-February-2014
* @brief This file implements functions for opening and closing Pipes
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* 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)
{
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)
{
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 != 0xFFFF)
{
phost->Pipes[pipe] = 0x8000 | ep_addr;
}
return 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 < 11)
{
phost->Pipes[idx] &= 0x7FFF;
}
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 = 0;
for (idx = 0 ; idx < 11 ; idx++)
{
if ((phost->Pipes[idx] & 0x8000) == 0)
{
return idx;
}
}
return 0xFFFF;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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