circuitpython/stm/stmusbh/usbh_hcs.c

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/**
******************************************************************************
* @file usbh_hcs.c
* @author MCD Application Team
* @version V2.1.0
* @date 19-March-2012
* @brief This file implements functions for opening and closing host channels
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT 2012 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_hcs.h"
/** @addtogroup USBH_LIB
* @{
*/
/** @addtogroup USBH_LIB_CORE
* @{
*/
/** @defgroup USBH_HCS
* @brief This file includes opening and closing host channels
* @{
*/
/** @defgroup USBH_HCS_Private_Defines
* @{
*/
/**
* @}
*/
/** @defgroup USBH_HCS_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @defgroup USBH_HCS_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup USBH_HCS_Private_Variables
* @{
*/
/**
* @}
*/
/** @defgroup USBH_HCS_Private_FunctionPrototypes
* @{
*/
static uint16_t USBH_GetFreeChannel (USB_OTG_CORE_HANDLE *pdev);
/**
* @}
*/
/** @defgroup USBH_HCS_Private_Functions
* @{
*/
/**
* @brief USBH_Open_Channel
* Open a pipe
* @param pdev : Selected device
* @param hc_num: Host channel 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 Status
*/
uint8_t USBH_Open_Channel (USB_OTG_CORE_HANDLE *pdev,
uint8_t hc_num,
uint8_t dev_address,
uint8_t speed,
uint8_t ep_type,
uint16_t mps)
{
pdev->host.hc[hc_num].ep_num = pdev->host.channel[hc_num]& 0x7F;
pdev->host.hc[hc_num].ep_is_in = (pdev->host.channel[hc_num] & 0x80 ) == 0x80;
pdev->host.hc[hc_num].dev_addr = dev_address;
pdev->host.hc[hc_num].ep_type = ep_type;
pdev->host.hc[hc_num].max_packet = mps;
pdev->host.hc[hc_num].speed = speed;
pdev->host.hc[hc_num].toggle_in = 0;
pdev->host.hc[hc_num].toggle_out = 0;
if(speed == HPRT0_PRTSPD_HIGH_SPEED)
{
pdev->host.hc[hc_num].do_ping = 1;
}
USB_OTG_HC_Init(pdev, hc_num) ;
return HC_OK;
}
/**
* @brief USBH_Modify_Channel
* Modify a pipe
* @param pdev : Selected device
* @param hc_num: Host channel 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 Status
*/
uint8_t USBH_Modify_Channel (USB_OTG_CORE_HANDLE *pdev,
uint8_t hc_num,
uint8_t dev_address,
uint8_t speed,
uint8_t ep_type,
uint16_t mps)
{
if(dev_address != 0)
{
pdev->host.hc[hc_num].dev_addr = dev_address;
}
if((pdev->host.hc[hc_num].max_packet != mps) && (mps != 0))
{
pdev->host.hc[hc_num].max_packet = mps;
}
if((pdev->host.hc[hc_num].speed != speed ) && (speed != 0 ))
{
pdev->host.hc[hc_num].speed = speed;
}
USB_OTG_HC_Init(pdev, hc_num);
return HC_OK;
}
/**
* @brief USBH_Alloc_Channel
* Allocate a new channel for the pipe
* @param ep_addr: End point for which the channel to be allocated
* @retval hc_num: Host channel number
*/
uint8_t USBH_Alloc_Channel (USB_OTG_CORE_HANDLE *pdev, uint8_t ep_addr)
{
uint16_t hc_num;
hc_num = USBH_GetFreeChannel(pdev);
if (hc_num != HC_ERROR)
{
pdev->host.channel[hc_num] = HC_USED | ep_addr;
}
return hc_num;
}
/**
* @brief USBH_Free_Pipe
* Free the USB host channel
* @param idx: Channel number to be freed
* @retval Status
*/
uint8_t USBH_Free_Channel (USB_OTG_CORE_HANDLE *pdev, uint8_t idx)
{
if(idx < HC_MAX)
{
pdev->host.channel[idx] &= HC_USED_MASK;
}
return USBH_OK;
}
/**
* @brief USBH_DeAllocate_AllChannel
* Free all USB host channel
* @param pdev : core instance
* @retval Status
*/
uint8_t USBH_DeAllocate_AllChannel (USB_OTG_CORE_HANDLE *pdev)
{
uint8_t idx;
for (idx = 2; idx < HC_MAX ; idx ++)
{
pdev->host.channel[idx] = 0;
}
return USBH_OK;
}
/**
* @brief USBH_GetFreeChannel
* Get a free channel number for allocation to a device endpoint
* @param None
* @retval idx: Free Channel number
*/
static uint16_t USBH_GetFreeChannel (USB_OTG_CORE_HANDLE *pdev)
{
uint8_t idx = 0;
for (idx = 0 ; idx < HC_MAX ; idx++)
{
if ((pdev->host.channel[idx] & HC_USED) == 0)
{
return idx;
}
}
return HC_ERROR;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/