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