Samuel Mokrani / Mbed 2 deprecated USBAudio_micro

USBAudio example using a microphone

Dependencies:   USBDevice mbed

USBDevice/USBAudio/USBAudio.cpp@3:e6a29c83ac52, 2011-12-19 (annotated)

Committer:
samux
Date:
Mon Dec 19 15:46:17 2011 +0000
Revision:
3:e6a29c83ac52
Parent:
2:7d8bdeb3753b
Child:
5:b49b6a8ca111
ok we can send a music from an sdcard but readings are time to time slow...

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 0:539ec61e1fbb 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
samux 0:539ec61e1fbb 2 *
samux 0:539ec61e1fbb 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 0:539ec61e1fbb 4 * and associated documentation files (the "Software"), to deal in the Software without
samux 0:539ec61e1fbb 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
samux 0:539ec61e1fbb 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
samux 0:539ec61e1fbb 7 * Software is furnished to do so, subject to the following conditions:
samux 0:539ec61e1fbb 8 *
samux 0:539ec61e1fbb 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 0:539ec61e1fbb 10 * substantial portions of the Software.
samux 0:539ec61e1fbb 11 *
samux 0:539ec61e1fbb 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 0:539ec61e1fbb 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 0:539ec61e1fbb 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 0:539ec61e1fbb 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 0:539ec61e1fbb 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 0:539ec61e1fbb 17 */
samux 0:539ec61e1fbb 18
samux 0:539ec61e1fbb 19 #include "stdint.h"
samux 0:539ec61e1fbb 20 #include "USBAudio.h"
samux 0:539ec61e1fbb 21 #include "USBBusInterface.h"
samux 0:539ec61e1fbb 22 #include "USBAudio_Types.h"
samux 0:539ec61e1fbb 23
samux 0:539ec61e1fbb 24
samux 0:539ec61e1fbb 25
samux 0:539ec61e1fbb 26 USBAudio::USBAudio(uint32_t frequency, uint8_t channel_nb, uint16_t vendor_id, uint16_t product_id, uint16_t product_release): USBDevice(vendor_id, product_id, product_release) {
samux 0:539ec61e1fbb 27
samux 0:539ec61e1fbb 28 FREQ = frequency;
samux 0:539ec61e1fbb 29
samux 0:539ec61e1fbb 30 this->channel_nb = channel_nb;
samux 0:539ec61e1fbb 31
samux 0:539ec61e1fbb 32 // stereo -> *2, mono -> *1
samux 0:539ec61e1fbb 33 PACKET_SIZE_ISO = (FREQ / 500) * channel_nb;
samux 0:539ec61e1fbb 34
samux 0:539ec61e1fbb 35 // STEREO -> left and right
samux 0:539ec61e1fbb 36 channel_config = (channel_nb == 1) ? CHANNEL_M : CHANNEL_L + CHANNEL_R;
samux 0:539ec61e1fbb 37
samux 0:539ec61e1fbb 38 SOF_handler = false;
samux 0:539ec61e1fbb 39 readIN = false;
samux 0:539ec61e1fbb 40 interruptIN = false;
samux 0:539ec61e1fbb 41
samux 0:539ec61e1fbb 42 buf_stream = NULL;
samux 0:539ec61e1fbb 43
samux 0:539ec61e1fbb 44 // connect the device
samux 0:539ec61e1fbb 45 USBDevice::connect();
samux 0:539ec61e1fbb 46 }
samux 0:539ec61e1fbb 47
samux 0:539ec61e1fbb 48 bool USBAudio::write(uint8_t * buf) {
samux 0:539ec61e1fbb 49 readIN = false;
samux 0:539ec61e1fbb 50 SOF_handler = false;
samux 1:1d38d9ca354d 51 if (interruptIN) {
samux 1:1d38d9ca354d 52 USBDevice::writeNB(EP3IN, buf, 16, 16);
samux 1:1d38d9ca354d 53 } else {
samux 1:1d38d9ca354d 54 buf_stream = buf;
samux 0:539ec61e1fbb 55 }
samux 1:1d38d9ca354d 56 while (!SOF_handler);
samux 1:1d38d9ca354d 57 if (interruptIN) {
samux 1:1d38d9ca354d 58 while (!readIN);
samux 1:1d38d9ca354d 59 }
samux 1:1d38d9ca354d 60 buf_stream = NULL;
samux 0:539ec61e1fbb 61 return true;
samux 0:539ec61e1fbb 62 }
samux 0:539ec61e1fbb 63
samux 0:539ec61e1fbb 64 // Called in ISR context on each start of frame
samux 0:539ec61e1fbb 65 void USBAudio::SOF(int frameNumber) {
samux 1:1d38d9ca354d 66 if (buf_stream != NULL) {
samux 1:1d38d9ca354d 67 USBDevice::writeNB(EP3IN, (uint8_t *)buf_stream, 16, 16);
samux 0:539ec61e1fbb 68 }
samux 0:539ec61e1fbb 69 SOF_handler = true;
samux 0:539ec61e1fbb 70 }
samux 0:539ec61e1fbb 71
samux 0:539ec61e1fbb 72
samux 0:539ec61e1fbb 73 bool USBAudio::EP3_IN_callback() {
samux 0:539ec61e1fbb 74 interruptIN = true;
samux 0:539ec61e1fbb 75 readIN = true;
samux 0:539ec61e1fbb 76 return true;
samux 0:539ec61e1fbb 77 }
samux 0:539ec61e1fbb 78
samux 0:539ec61e1fbb 79
samux 0:539ec61e1fbb 80 // Called in ISR context
samux 0:539ec61e1fbb 81 // Set configuration. Return false if the configuration is not supported.
samux 0:539ec61e1fbb 82 bool USBAudio::USBCallback_setConfiguration(uint8_t configuration) {
samux 0:539ec61e1fbb 83 if (configuration != DEFAULT_CONFIGURATION) {
samux 0:539ec61e1fbb 84 return false;
samux 0:539ec61e1fbb 85 }
samux 0:539ec61e1fbb 86
samux 0:539ec61e1fbb 87 // Configure isochronous endpoint
samux 0:539ec61e1fbb 88 realiseEndpoint(EP3IN, PACKET_SIZE_ISO, ISOCHRONOUS);
samux 0:539ec61e1fbb 89 return true;
samux 0:539ec61e1fbb 90 }
samux 0:539ec61e1fbb 91
samux 0:539ec61e1fbb 92
samux 0:539ec61e1fbb 93 // Called in ISR context
samux 0:539ec61e1fbb 94 // Set alternate setting. Return false if the alternate setting is not supported
samux 0:539ec61e1fbb 95 bool USBAudio::USBCallback_setInterface(uint16_t interface, uint8_t alternate) {
samux 0:539ec61e1fbb 96 if (interface == 0 && alternate == 0) {
samux 0:539ec61e1fbb 97 return true;
samux 0:539ec61e1fbb 98 }
samux 0:539ec61e1fbb 99 if (interface == 1 && (alternate == 0 || alternate == 1)) {
samux 0:539ec61e1fbb 100 return true;
samux 0:539ec61e1fbb 101 } else
samux 0:539ec61e1fbb 102 printf("intf: %d, alt: %d\r\n", interface, alternate);
samux 0:539ec61e1fbb 103 return false;
samux 0:539ec61e1fbb 104 }
samux 0:539ec61e1fbb 105
samux 0:539ec61e1fbb 106
samux 0:539ec61e1fbb 107
samux 0:539ec61e1fbb 108 #define TOTAL_DESCRIPTOR_LENGTH ((1 * CONFIGURATION_DESCRIPTOR_LENGTH) \
samux 0:539ec61e1fbb 109 + (5 * INTERFACE_DESCRIPTOR_LENGTH) \
samux 0:539ec61e1fbb 110 + (1 * CONTROL_INTERFACE_DESCRIPTOR_LENGTH) \
samux 0:539ec61e1fbb 111 + (2 * INPUT_TERMINAL_DESCRIPTOR_LENGTH) \
samux 0:539ec61e1fbb 112 + (2 * FEATURE_UNIT_DESCRIPTOR_LENGTH) \
samux 0:539ec61e1fbb 113 + (2 * OUTPUT_TERMINAL_DESCRIPTOR_LENGTH) \
samux 0:539ec61e1fbb 114 + (0x07) \
samux 0:539ec61e1fbb 115 + (2 * STREAMING_INTERFACE_DESCRIPTOR_LENGTH) \
samux 0:539ec61e1fbb 116 + (2 * FORMAT_TYPE_I_DESCRIPTOR_LENGTH) \
samux 0:539ec61e1fbb 117 + (2 * (ENDPOINT_DESCRIPTOR_LENGTH + 2)) \
samux 0:539ec61e1fbb 118 + (2 * STREAMING_ENDPOINT_DESCRIPTOR_LENGTH) )
samux 0:539ec61e1fbb 119
samux 0:539ec61e1fbb 120 #define TOTAL_CONTROL_INTF_LENGTH (CONTROL_INTERFACE_DESCRIPTOR_LENGTH + \
samux 0:539ec61e1fbb 121 2 * INPUT_TERMINAL_DESCRIPTOR_LENGTH + \
samux 0:539ec61e1fbb 122 2 * FEATURE_UNIT_DESCRIPTOR_LENGTH + \
samux 0:539ec61e1fbb 123 2 * OUTPUT_TERMINAL_DESCRIPTOR_LENGTH + \
samux 0:539ec61e1fbb 124 0x07)
samux 0:539ec61e1fbb 125
samux 0:539ec61e1fbb 126 uint8_t * USBAudio::configurationDesc() {
samux 0:539ec61e1fbb 127 static uint8_t configDescriptor[] = {
samux 0:539ec61e1fbb 128 // Configuration 1
samux 2:7d8bdeb3753b 129 CONFIGURATION_DESCRIPTOR_LENGTH, // bLength
samux 2:7d8bdeb3753b 130 CONFIGURATION_DESCRIPTOR, // bDescriptorType
samux 2:7d8bdeb3753b 131 0x64, // wTotalLength (LSB)
samux 2:7d8bdeb3753b 132 0x00, // wTotalLength (MSB)
samux 2:7d8bdeb3753b 133 0x02, // bNumInterfaces
samux 2:7d8bdeb3753b 134 DEFAULT_CONFIGURATION, // bConfigurationValue
samux 2:7d8bdeb3753b 135 0x00, // iConfiguration
samux 2:7d8bdeb3753b 136 0x80, // bmAttributes
samux 2:7d8bdeb3753b 137 50, // bMaxPower
samux 0:539ec61e1fbb 138
samux 0:539ec61e1fbb 139 // Interface 0, Alternate Setting 0, Audio Control
samux 2:7d8bdeb3753b 140 INTERFACE_DESCRIPTOR_LENGTH, // bLength
samux 2:7d8bdeb3753b 141 INTERFACE_DESCRIPTOR, // bDescriptorType
samux 2:7d8bdeb3753b 142 0x00, // bInterfaceNumber
samux 2:7d8bdeb3753b 143 0x00, // bAlternateSetting
samux 2:7d8bdeb3753b 144 0x00, // bNumEndpoints
samux 2:7d8bdeb3753b 145 0x01, // bInterfaceClass
samux 2:7d8bdeb3753b 146 0x01, // bInterfaceSubClass
samux 2:7d8bdeb3753b 147 0x00, // bInterfaceProtocol
samux 2:7d8bdeb3753b 148 0x00, // iInterface
samux 0:539ec61e1fbb 149
samux 0:539ec61e1fbb 150
samux 0:539ec61e1fbb 151 // Audio Control Interface
samux 2:7d8bdeb3753b 152 0x09, // bLength
samux 2:7d8bdeb3753b 153 0x24, // bDescriptorType
samux 2:7d8bdeb3753b 154 0x01, // bDescriptorSubtype
samux 2:7d8bdeb3753b 155 LSB(0x0100), // bcdADC (LSB)
samux 2:7d8bdeb3753b 156 MSB(0x0100), // bcdADC (MSB)
samux 2:7d8bdeb3753b 157 0x1e, // wTotalLength
samux 2:7d8bdeb3753b 158 0x00, // wTotalLength
samux 2:7d8bdeb3753b 159 0x01, // bInCollection
samux 2:7d8bdeb3753b 160 0x01, // baInterfaceNr
samux 0:539ec61e1fbb 161
samux 0:539ec61e1fbb 162 // Audio Input Terminal (Speaker)
samux 2:7d8bdeb3753b 163 0x0c, // bLength
samux 2:7d8bdeb3753b 164 0x24, // bDescriptorType
samux 2:7d8bdeb3753b 165 0x02, // bDescriptorSubtype
samux 2:7d8bdeb3753b 166 0x01, // bTerminalID
samux 2:7d8bdeb3753b 167 0x01, // wTerminalType
samux 2:7d8bdeb3753b 168 0x02, // wTerminalType
samux 2:7d8bdeb3753b 169 0x00, // bAssocTerminal
samux 2:7d8bdeb3753b 170 0x01, // bNrChannels
samux 2:7d8bdeb3753b 171 0x00, // wChannelConfig
samux 2:7d8bdeb3753b 172 0x00, // wChannelConfig
samux 2:7d8bdeb3753b 173 0x00, // iChannelNames
samux 2:7d8bdeb3753b 174 0x00, // iTerminal
samux 0:539ec61e1fbb 175
samux 0:539ec61e1fbb 176 // Audio Output Terminal (Speaker)
samux 2:7d8bdeb3753b 177 0x09, // bLength
samux 2:7d8bdeb3753b 178 0x24, // bDescriptorType
samux 2:7d8bdeb3753b 179 0x03, // bDescriptorSubtype
samux 2:7d8bdeb3753b 180 0x02, // bTerminalID
samux 2:7d8bdeb3753b 181 0x01, // wTerminalType
samux 2:7d8bdeb3753b 182 0x01, // wTerminalType
samux 2:7d8bdeb3753b 183 0x00, // bAssocTerminal
samux 2:7d8bdeb3753b 184 0x01, // bSourceID
samux 2:7d8bdeb3753b 185 0x00, // iTerminal
samux 0:539ec61e1fbb 186
samux 0:539ec61e1fbb 187
samux 0:539ec61e1fbb 188
samux 0:539ec61e1fbb 189
samux 0:539ec61e1fbb 190
samux 0:539ec61e1fbb 191
samux 0:539ec61e1fbb 192
samux 0:539ec61e1fbb 193
samux 0:539ec61e1fbb 194 // Interface 1, Alternate Setting 0, Audio Streaming - Zero Bandwith
samux 2:7d8bdeb3753b 195 0x09, // bLength
samux 2:7d8bdeb3753b 196 0x04, // bDescriptorType
samux 2:7d8bdeb3753b 197 0x01, // bInterfaceNumber
samux 2:7d8bdeb3753b 198 0x00, // bAlternateSetting
samux 2:7d8bdeb3753b 199 0x00, // bNumEndpoints
samux 2:7d8bdeb3753b 200 0x01, // bInterfaceClass
samux 2:7d8bdeb3753b 201 0x02, // bInterfaceSubClass
samux 2:7d8bdeb3753b 202 0x00, // bInterfaceProtocol
samux 2:7d8bdeb3753b 203 0x00, // iInterface
samux 0:539ec61e1fbb 204
samux 0:539ec61e1fbb 205 // Interface 1, Alternate Setting 1, Audio Streaming - Operational
samux 2:7d8bdeb3753b 206 0x09, // bLength
samux 2:7d8bdeb3753b 207 0x04, // bDescriptorType
samux 2:7d8bdeb3753b 208 0x01, // bInterfaceNumber
samux 2:7d8bdeb3753b 209 0x01, // bAlternateSetting
samux 2:7d8bdeb3753b 210 0x01, // bNumEndpoints
samux 2:7d8bdeb3753b 211 0x01, // bInterfaceClass
samux 2:7d8bdeb3753b 212 0x02, // bInterfaceSubClass
samux 2:7d8bdeb3753b 213 0x00, // bInterfaceProtocol
samux 2:7d8bdeb3753b 214 0x00, // iInterface
samux 0:539ec61e1fbb 215
samux 0:539ec61e1fbb 216 // Audio Streaming Interface
samux 2:7d8bdeb3753b 217 0x07, // bLength
samux 2:7d8bdeb3753b 218 0x24, // bDescriptorType
samux 2:7d8bdeb3753b 219 0x01, // bDescriptorSubtype
samux 2:7d8bdeb3753b 220 0x02, // bTerminalLink
samux 2:7d8bdeb3753b 221 0x01, // bDelay
samux 2:7d8bdeb3753b 222 0x01, // wFormatTag
samux 2:7d8bdeb3753b 223 0x00, // wFormatTag
samux 0:539ec61e1fbb 224
samux 0:539ec61e1fbb 225 // Audio Type I Format
samux 2:7d8bdeb3753b 226 0x0B, // bLength
samux 2:7d8bdeb3753b 227 0x24, // bDescriptorType
samux 2:7d8bdeb3753b 228 0x02, // bDescriptorSubtype
samux 2:7d8bdeb3753b 229 0x01, // bFormatType
samux 2:7d8bdeb3753b 230 0x01, // bNrChannels
samux 2:7d8bdeb3753b 231 0x02, // bSubFrameSize
samux 2:7d8bdeb3753b 232 0x10, // bBitResolution
samux 2:7d8bdeb3753b 233 0x01, // bSamFreqType
samux 2:7d8bdeb3753b 234 0x40, // tSamFreq
samux 2:7d8bdeb3753b 235 0x1F, // tSamFreq
samux 2:7d8bdeb3753b 236 0x00, // tSamFreq
samux 0:539ec61e1fbb 237
samux 0:539ec61e1fbb 238 // Endpoint - Standard Descriptor
samux 2:7d8bdeb3753b 239 0x09, // bLength
samux 2:7d8bdeb3753b 240 0x05, // bDescriptorType
samux 2:7d8bdeb3753b 241 PHY_TO_DESC(EPISO_IN), // bEndpointAddress
samux 2:7d8bdeb3753b 242 E_ISOCHRONOUS, // bmAttributes
samux 2:7d8bdeb3753b 243 LSB(PACKET_SIZE_ISO), // wMaxPacketSize
samux 2:7d8bdeb3753b 244 MSB(PACKET_SIZE_ISO), // wMaxPacketSize
samux 2:7d8bdeb3753b 245 0x01, // bInterval
samux 2:7d8bdeb3753b 246 0x00, // bRefresh
samux 2:7d8bdeb3753b 247 0x00, // bSynchAddress
samux 0:539ec61e1fbb 248
samux 0:539ec61e1fbb 249 // Endpoint - Audio Streaming
samux 0:539ec61e1fbb 250 0x07, // bLength
samux 2:7d8bdeb3753b 251 0x25, // bDescriptorType
samux 2:7d8bdeb3753b 252 0x01, // bDescriptor
samux 2:7d8bdeb3753b 253 0x00, // bmAttributes
samux 2:7d8bdeb3753b 254 0x00, // bLockDelayUnits
samux 2:7d8bdeb3753b 255 LSB(0x0000), // wLockDelay
samux 2:7d8bdeb3753b 256 MSB(0x0000), // wLockDelay
samux 0:539ec61e1fbb 257
samux 0:539ec61e1fbb 258
samux 0:539ec61e1fbb 259
samux 0:539ec61e1fbb 260
samux 0:539ec61e1fbb 261 // Terminator
samux 0:539ec61e1fbb 262 0
samux 0:539ec61e1fbb 263 };
samux 0:539ec61e1fbb 264 //printf("size config: %d\r\n", sizeof(configDescriptor));
samux 0:539ec61e1fbb 265 return configDescriptor;
samux 0:539ec61e1fbb 266 }
samux 0:539ec61e1fbb 267
samux 0:539ec61e1fbb 268 uint8_t * USBAudio::stringIinterfaceDesc() {
samux 0:539ec61e1fbb 269 static uint8_t stringIinterfaceDescriptor[] = {
samux 0:539ec61e1fbb 270 0x0c, //bLength
samux 0:539ec61e1fbb 271 STRING_DESCRIPTOR, //bDescriptorType 0x03
samux 0:539ec61e1fbb 272 'A',0,'u',0,'d',0,'i',0,'o',0 //bString iInterface - Audio
samux 0:539ec61e1fbb 273 };
samux 0:539ec61e1fbb 274 return stringIinterfaceDescriptor;
samux 0:539ec61e1fbb 275 }
samux 0:539ec61e1fbb 276
samux 0:539ec61e1fbb 277 uint8_t * USBAudio::stringIproductDesc() {
samux 0:539ec61e1fbb 278 static uint8_t stringIproductDescriptor[] = {
samux 0:539ec61e1fbb 279 0x16, //bLength
samux 0:539ec61e1fbb 280 STRING_DESCRIPTOR, //bDescriptorType 0x03
samux 0:539ec61e1fbb 281 'M',0,'b',0,'e',0,'d',0,' ',0,'A',0,'u',0,'d',0,'i',0,'o',0 //bString iProduct - Mbed Audio
samux 0:539ec61e1fbb 282 };
samux 0:539ec61e1fbb 283 return stringIproductDescriptor;
samux 0:539ec61e1fbb 284 }