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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
/*
Title: USBGenericRequest implementation
About: Purpose
Implementation of the USBGenericRequest class.
*/
//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include "USBGenericRequest.h"
//------------------------------------------------------------------------------
// Exported functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// Returns the type of the given request.
/// \param request Pointer to a USBGenericRequest instance.
/// \return "USB Request Types"
//------------------------------------------------------------------------------
extern unsigned char USBGenericRequest_GetType(const USBGenericRequest *request)
{
return ((request->bmRequestType >> 5) & 0x3);
}
//------------------------------------------------------------------------------
/// Returns the request code of the given request.
/// \param request Pointer to a USBGenericRequest instance.
/// \return Request code.
/// \sa "USB Request Codes"
//------------------------------------------------------------------------------
unsigned char USBGenericRequest_GetRequest(const USBGenericRequest *request)
{
return request->bRequest;
}
//------------------------------------------------------------------------------
/// Returns the wValue field of the given request.
/// \param request - Pointer to a USBGenericRequest instance.
/// \return Request value.
//------------------------------------------------------------------------------
unsigned short USBGenericRequest_GetValue(const USBGenericRequest *request)
{
return request->wValue;
}
//------------------------------------------------------------------------------
/// Returns the wIndex field of the given request.
/// \param request Pointer to a USBGenericRequest instance.
/// \return Request index;
//------------------------------------------------------------------------------
unsigned short USBGenericRequest_GetIndex(const USBGenericRequest *request)
{
return request->wIndex;
}
//------------------------------------------------------------------------------
/// Returns the expected length of the data phase following a request.
/// \param request Pointer to a USBGenericRequest instance.
/// \return Length of data phase.
//------------------------------------------------------------------------------
unsigned short USBGenericRequest_GetLength(const USBGenericRequest *request)
{
return request->wLength;
}
//------------------------------------------------------------------------------
/// Returns the endpoint number targetted by a given request.
/// \param request Pointer to a USBGenericRequest instance.
/// \return Endpoint number.
//------------------------------------------------------------------------------
unsigned char USBGenericRequest_GetEndpointNumber(
const USBGenericRequest *request)
{
return USBGenericRequest_GetIndex(request) & 0xF;
}
//------------------------------------------------------------------------------
/// Returns the intended recipient of a given request.
/// \param request Pointer to a USBGenericRequest instance.
/// \return Request recipient.
/// \sa "USB Request Recipients"
//------------------------------------------------------------------------------
unsigned char USBGenericRequest_GetRecipient(const USBGenericRequest *request)
{
// Recipient is in bits [0..4] of the bmRequestType field
return request->bmRequestType & 0xF;
}
//------------------------------------------------------------------------------
/// Returns the direction of the data transfer following the given request.
/// \param request Pointer to a USBGenericRequest instance.
/// \return Transfer direction.
/// \sa "USB Request Directions"
//------------------------------------------------------------------------------
unsigned char USBGenericRequest_GetDirection(const USBGenericRequest *request)
{
// Transfer direction is located in bit D7 of the bmRequestType field
if ((request->bmRequestType & 0x80) != 0) {
return USBGenericRequest_IN;
}
else {
return USBGenericRequest_OUT;
}
}
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