205 lines
4.4 KiB
C
205 lines
4.4 KiB
C
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/**
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******************************************************************************
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* @file usbh_pipes.c
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* @author MCD Application Team
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* @version V3.0.0
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* @date 18-February-2014
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* @brief This file implements functions for opening and closing Pipes
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "usbh_pipes.h"
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/** @addtogroup USBH_LIB
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* @{
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*/
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/** @addtogroup USBH_LIB_CORE
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* @{
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*/
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/** @defgroup USBH_PIPES
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* @brief This file includes opening and closing Pipes
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* @{
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*/
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/** @defgroup USBH_PIPES_Private_Defines
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup USBH_PIPES_Private_TypesDefinitions
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup USBH_PIPES_Private_Macros
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup USBH_PIPES_Private_Variables
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup USBH_PIPES_Private_Functions
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* @{
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*/
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static uint16_t USBH_GetFreePipe (USBH_HandleTypeDef *phost);
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/**
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* @brief USBH_Open_Pipe
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* Open a pipe
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* @param phost: Host Handle
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* @param pipe_num: Pipe Number
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* @param dev_address: USB Device address allocated to attached device
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* @param speed : USB device speed (Full/Low)
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* @param ep_type: end point type (Bulk/int/ctl)
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* @param mps: max pkt size
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* @retval USBH Status
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*/
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USBH_StatusTypeDef USBH_OpenPipe (USBH_HandleTypeDef *phost,
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uint8_t pipe_num,
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uint8_t epnum,
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uint8_t dev_address,
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uint8_t speed,
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uint8_t ep_type,
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uint16_t mps)
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{
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USBH_LL_OpenPipe(phost,
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pipe_num,
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epnum,
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dev_address,
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speed,
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ep_type,
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mps);
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return USBH_OK;
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}
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/**
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* @brief USBH_ClosePipe
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* Close a pipe
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* @param phost: Host Handle
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* @param pipe_num: Pipe Number
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* @retval USBH Status
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*/
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USBH_StatusTypeDef USBH_ClosePipe (USBH_HandleTypeDef *phost,
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uint8_t pipe_num)
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{
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USBH_LL_ClosePipe(phost, pipe_num);
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return USBH_OK;
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}
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/**
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* @brief USBH_Alloc_Pipe
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* Allocate a new Pipe
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* @param phost: Host Handle
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* @param ep_addr: End point for which the Pipe to be allocated
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* @retval Pipe number
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*/
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uint8_t USBH_AllocPipe (USBH_HandleTypeDef *phost, uint8_t ep_addr)
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{
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uint16_t pipe;
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pipe = USBH_GetFreePipe(phost);
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if (pipe != 0xFFFF)
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{
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phost->Pipes[pipe] = 0x8000 | ep_addr;
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}
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return pipe;
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}
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/**
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* @brief USBH_Free_Pipe
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* Free the USB Pipe
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* @param phost: Host Handle
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* @param idx: Pipe number to be freed
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* @retval USBH Status
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*/
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USBH_StatusTypeDef USBH_FreePipe (USBH_HandleTypeDef *phost, uint8_t idx)
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{
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if(idx < 11)
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{
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phost->Pipes[idx] &= 0x7FFF;
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}
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return USBH_OK;
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}
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/**
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* @brief USBH_GetFreePipe
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* @param phost: Host Handle
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* Get a free Pipe number for allocation to a device endpoint
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* @retval idx: Free Pipe number
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*/
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static uint16_t USBH_GetFreePipe (USBH_HandleTypeDef *phost)
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{
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uint8_t idx = 0;
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for (idx = 0 ; idx < 11 ; idx++)
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{
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if ((phost->Pipes[idx] & 0x8000) == 0)
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{
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return idx;
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}
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}
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return 0xFFFF;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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