SAMV71 Xplained Ultra Software Package 1.3

CDCAUDDDriver.c

00001 /* ----------------------------------------------------------------------------
00002  *         ATMEL Microcontroller Software Support 
00003  * ----------------------------------------------------------------------------
00004  * Copyright (c) 2010, Atmel Corporation
00005  *
00006  * All rights reserved.
00007  *
00008  * Redistribution and use in source and binary forms, with or without
00009  * modification, are permitted provided that the following conditions are met:
00010  *
00011  * - Redistributions of source code must retain the above copyright notice,
00012  * this list of conditions and the disclaimer below.
00013  *
00014  * Atmel's name may not be used to endorse or promote products derived from
00015  * this software without specific prior written permission.
00016  *
00017  * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
00019  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
00020  * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00022  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
00023  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00024  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00025  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
00026  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  * ----------------------------------------------------------------------------
00028  */
00029 
00030 /** \addtogroup usbd_composite_cdcaud
00031  *@{
00032  */
00033 /*---------------------------------------------------------------------------
00034  *      Headers
00035  *---------------------------------------------------------------------------*/
00036 
00037 #include <USBLib_Trace.h>
00038 
00039 #include <CDCAUDDDriver.h>
00040 #include <CDCDSerial.h>
00041 #include <AUDDFunction.h>
00042 
00043 /*---------------------------------------------------------------------------
00044  *         Defines
00045  *---------------------------------------------------------------------------*/
00046 
00047 /*---------------------------------------------------------------------------
00048  *         Types
00049  *---------------------------------------------------------------------------*/
00050 
00051 /*---------------------------------------------------------------------------
00052  *         Internal variables
00053  *---------------------------------------------------------------------------*/
00054 
00055 /** Array for storing the current setting of each interface */
00056 static uint8_t bAltInterfaces[CDCAUDDDriverDescriptors_MaxNumInterfaces];
00057 
00058 /*---------------------------------------------------------------------------
00059  *         Internal functions
00060  *---------------------------------------------------------------------------*/
00061 
00062 /*---------------------------------------------------------------------------
00063  *         Exported functions
00064  *---------------------------------------------------------------------------*/
00065 
00066 /**
00067  * Initializes the USB device composite device driver.
00068  */
00069 void CDCAUDDDriver_Initialize(const USBDDriverDescriptors *pDescriptors)
00070 {
00071     USBDDriver *pUsbd = USBD_GetDriver();
00072 
00073     /* Initialize the standard USB driver */
00074     USBDDriver_Initialize(pUsbd,
00075                           pDescriptors,
00076                           bAltInterfaces);
00077 
00078     /* CDC */
00079     CDCDSerial_Initialize(pUsbd, CDCAUDDDriverDescriptors_CDC_INTERFACE);
00080     /* Audio */
00081     AUDDFunction_Initialize(pUsbd, CDCAUDDDriverDescriptors_AUD_INTERFACE);
00082 
00083     /* Initialize the USB driver */
00084     USBD_Init();
00085 }
00086 
00087 /**
00088  * Invoked whenever the configuration value of a device is changed by the host
00089  * \param cfgnum Configuration number.
00090  */
00091 void CDCAUDDDriver_ConfigurationChangedHandler(uint8_t cfgnum)
00092 {
00093     USBDDriver *pUsbd = USBD_GetDriver();
00094     USBConfigurationDescriptor *pDesc;
00095     if (cfgnum > 0) {
00096         pDesc = USBDDriver_GetCfgDescriptors(pUsbd, cfgnum);
00097         /* CDC */
00098         CDCDSerial_ConfigureFunction((USBGenericDescriptor*)pDesc,
00099                                       pDesc->wTotalLength);
00100         /* AUD */
00101         AUDDFunction_Configure((USBGenericDescriptor*)pDesc,
00102                                 pDesc->wTotalLength);
00103     }
00104 }
00105 
00106 /**
00107  * Invoked whenever the active setting of an interface is changed by the
00108  * host. Changes the status of the third LED accordingly.
00109  * \param interface Interface number.
00110  * \param setting Newly active setting.
00111  */
00112 void CDCAUDDDriver_InterfaceSettingChangedHandler(uint8_t interface,
00113                                                   uint8_t setting)
00114 {
00115     AUDDFunction_InterfaceSettingChangedHandler(interface, setting);
00116 }
00117 
00118 /**
00119  * Handles composite-specific USB requests sent by the host, and forwards
00120  * standard ones to the USB device driver.
00121  * \param request Pointer to a USBGenericRequest instance.
00122  */
00123 void CDCAUDDDriver_RequestHandler(const USBGenericRequest *request)
00124 {
00125     USBDDriver *pUsbd = USBD_GetDriver();
00126 
00127     TRACE_INFO_WP("NewReq ");
00128 
00129     if (CDCDSerial_RequestHandler(request) == USBRC_SUCCESS)
00130         return;
00131 
00132     if (AUDDFunction_RequestHandler(request) == USBRC_SUCCESS)
00133         return;
00134 
00135     USBDDriver_RequestHandler(pUsbd, request);
00136 }
00137 
00138 /**@}*/
00139 
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