kopia lustrzana https://github.com/micropython/micropython
260 wiersze
5.9 KiB
C
260 wiersze
5.9 KiB
C
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/**
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******************************************************************************
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* @file usbh_hcs.c
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* @author MCD Application Team
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* @version V2.1.0
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* @date 19-March-2012
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* @brief This file implements functions for opening and closing host channels
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2012 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_hcs.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_HCS
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* @brief This file includes opening and closing host channels
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* @{
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*/
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/** @defgroup USBH_HCS_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_HCS_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_HCS_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_HCS_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_HCS_Private_FunctionPrototypes
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* @{
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*/
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static uint16_t USBH_GetFreeChannel (USB_OTG_CORE_HANDLE *pdev);
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/**
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* @}
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*/
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/** @defgroup USBH_HCS_Private_Functions
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* @{
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*/
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/**
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* @brief USBH_Open_Channel
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* Open a pipe
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* @param pdev : Selected device
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* @param hc_num: Host channel 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 Status
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*/
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uint8_t USBH_Open_Channel (USB_OTG_CORE_HANDLE *pdev,
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uint8_t hc_num,
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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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pdev->host.hc[hc_num].ep_num = pdev->host.channel[hc_num]& 0x7F;
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pdev->host.hc[hc_num].ep_is_in = (pdev->host.channel[hc_num] & 0x80 ) == 0x80;
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pdev->host.hc[hc_num].dev_addr = dev_address;
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pdev->host.hc[hc_num].ep_type = ep_type;
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pdev->host.hc[hc_num].max_packet = mps;
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pdev->host.hc[hc_num].speed = speed;
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pdev->host.hc[hc_num].toggle_in = 0;
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pdev->host.hc[hc_num].toggle_out = 0;
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if(speed == HPRT0_PRTSPD_HIGH_SPEED)
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{
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pdev->host.hc[hc_num].do_ping = 1;
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}
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USB_OTG_HC_Init(pdev, hc_num) ;
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return HC_OK;
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}
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/**
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* @brief USBH_Modify_Channel
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* Modify a pipe
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* @param pdev : Selected device
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* @param hc_num: Host channel 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 Status
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*/
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uint8_t USBH_Modify_Channel (USB_OTG_CORE_HANDLE *pdev,
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uint8_t hc_num,
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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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if(dev_address != 0)
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{
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pdev->host.hc[hc_num].dev_addr = dev_address;
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}
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if((pdev->host.hc[hc_num].max_packet != mps) && (mps != 0))
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{
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pdev->host.hc[hc_num].max_packet = mps;
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}
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if((pdev->host.hc[hc_num].speed != speed ) && (speed != 0 ))
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{
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pdev->host.hc[hc_num].speed = speed;
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}
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USB_OTG_HC_Init(pdev, hc_num);
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return HC_OK;
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}
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/**
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* @brief USBH_Alloc_Channel
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* Allocate a new channel for the pipe
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* @param ep_addr: End point for which the channel to be allocated
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* @retval hc_num: Host channel number
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*/
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uint8_t USBH_Alloc_Channel (USB_OTG_CORE_HANDLE *pdev, uint8_t ep_addr)
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{
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uint16_t hc_num;
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hc_num = USBH_GetFreeChannel(pdev);
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if (hc_num != HC_ERROR)
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{
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pdev->host.channel[hc_num] = HC_USED | ep_addr;
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}
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return hc_num;
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}
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/**
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* @brief USBH_Free_Pipe
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* Free the USB host channel
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* @param idx: Channel number to be freed
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* @retval Status
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*/
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uint8_t USBH_Free_Channel (USB_OTG_CORE_HANDLE *pdev, uint8_t idx)
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{
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if(idx < HC_MAX)
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{
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pdev->host.channel[idx] &= HC_USED_MASK;
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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_DeAllocate_AllChannel
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* Free all USB host channel
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* @param pdev : core instance
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* @retval Status
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*/
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uint8_t USBH_DeAllocate_AllChannel (USB_OTG_CORE_HANDLE *pdev)
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{
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uint8_t idx;
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for (idx = 2; idx < HC_MAX ; idx ++)
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{
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pdev->host.channel[idx] = 0;
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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_GetFreeChannel
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* Get a free channel number for allocation to a device endpoint
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* @param None
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* @retval idx: Free Channel number
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*/
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static uint16_t USBH_GetFreeChannel (USB_OTG_CORE_HANDLE *pdev)
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{
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uint8_t idx = 0;
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for (idx = 0 ; idx < HC_MAX ; idx++)
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{
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if ((pdev->host.channel[idx] & HC_USED) == 0)
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{
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return idx;
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}
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}
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return HC_ERROR;
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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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