LUFA/Drivers/USB/Class/Device/Audio.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 #include "../../HighLevel/USBMode.h"
  32 #if defined(USB_CAN_BE_DEVICE)
  33
  34 #include "Audio.h"
  35
  36 void Audio_Device_ProcessControlPacket(USB_ClassInfo_Audio_Device_t* AudioInterfaceInfo)
  37 {
  38         if (!(Endpoint_IsSETUPReceived()))
  39           return;
  40
  41         if (USB_ControlRequest.wIndex != AudioInterfaceInfo->Config.StreamingInterfaceNumber)
  42           return;
  43
  44         switch (USB_ControlRequest.bRequest)
  45         {
  46                 case REQ_SetInterface:
  47                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_INTERFACE))
  48                         {
  49                                 Endpoint_ClearSETUP();
  50
  51                                 AudioInterfaceInfo->State.InterfaceEnabled = (USB_ControlRequest.wValue != 0);
  52
  53                                 while (!(Endpoint_IsINReady()));
  54                                 Endpoint_ClearIN();
  55                         }
  56
  57                         break;
  58         }
  59 }
  60
  61 bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_Device_t* AudioInterfaceInfo)
  62 {
  63         if (AudioInterfaceInfo->Config.DataINEndpointNumber)
  64         {
  65                 if (!(Endpoint_ConfigureEndpoint(AudioInterfaceInfo->Config.DataINEndpointNumber, EP_TYPE_ISOCHRONOUS,
  66                                                                                  ENDPOINT_DIR_IN, AudioInterfaceInfo->Config.DataINEndpointSize,
  67                                                                                  ENDPOINT_BANK_DOUBLE)))
  68                 {
  69                         return false;
  70                 }
  71         }
  72
  73         if (AudioInterfaceInfo->Config.DataOUTEndpointNumber)
  74         {
  75                 if (!(Endpoint_ConfigureEndpoint(AudioInterfaceInfo->Config.DataOUTEndpointNumber, EP_TYPE_ISOCHRONOUS,
  76                                                                                  ENDPOINT_DIR_OUT, AudioInterfaceInfo->Config.DataOUTEndpointSize,
  77                                                                                  ENDPOINT_BANK_DOUBLE)))
  78                 {
  79                         return false;
  80                 }
  81         }
  82
  83         return true;
  84 }
  85
  86 void Audio_Device_USBTask(USB_ClassInfo_Audio_Device_t* AudioInterfaceInfo)
  87 {
  88
  89 }
  90
  91 int8_t Audio_Device_ReadSample8(void)
  92 {
  93         int8_t Sample;
  94
  95         Sample = Endpoint_Read_Byte();
  96
  97         if (!(Endpoint_IsReadWriteAllowed()))
  98           Endpoint_ClearOUT();
  99
 100         return Sample;
 101 }
 102
 103 int16_t Audio_Device_ReadSample16(void)
 104 {
 105         int16_t Sample;
 106
 107         Sample = (int16_t)Endpoint_Read_Word_LE();
 108
 109         if (!(Endpoint_IsReadWriteAllowed()))
 110           Endpoint_ClearOUT();
 111
 112         return Sample;
 113 }
 114
 115 int32_t Audio_Device_ReadSample24(void)
 116 {
 117         int32_t Sample;
 118
 119         Sample = (((uint32_t)Endpoint_Read_Byte() << 16) | Endpoint_Read_Word_LE());
 120
 121         if (!(Endpoint_IsReadWriteAllowed()))
 122           Endpoint_ClearOUT();
 123
 124         return Sample;
 125 }
 126
 127 void Audio_Device_WriteSample8(int8_t Sample)
 128 {
 129         Endpoint_Write_Byte(Sample);
 130
 131         if (!(Endpoint_IsReadWriteAllowed()))
 132           Endpoint_ClearIN();
 133 }
 134
 135 void Audio_Device_WriteSample16(int16_t Sample)
 136 {
 137         Endpoint_Write_Word_LE(Sample);
 138
 139         if (!(Endpoint_IsReadWriteAllowed()))
 140           Endpoint_ClearIN();
 141 }
 142
 143 void Audio_Device_WriteSample24(int32_t Sample)
 144 {
 145         Endpoint_Write_Byte(Sample >> 16);
 146         Endpoint_Write_Word_LE(Sample);
 147
 148         if (!(Endpoint_IsReadWriteAllowed()))
 149           Endpoint_ClearIN();
 150 }
 151
 152 bool Audio_Device_IsSampleReceived(USB_ClassInfo_Audio_Device_t* AudioInterfaceInfo)
 153 {
 154         Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataOUTEndpointNumber);
 155         return Endpoint_IsOUTReceived();
 156 }
 157
 158 bool Audio_Device_IsReadyForNextSample(USB_ClassInfo_Audio_Device_t* AudioInterfaceInfo)
 159 {
 160         Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataINEndpointNumber);
 161         return Endpoint_IsINReady();
 162 }
 163
 164 #endif