/** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 *  enumerated by the host and is now ready to be used by the application.
 */
void EVENT_USB_Host_DeviceEnumerationComplete(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);

	uint16_t ConfigDescriptorSize;
	uint8_t  ConfigDescriptorData[512];

	if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
	                                       sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
	{
		puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	if (Audio_Host_ConfigurePipes(&Speaker_Audio_Interface,
	                              ConfigDescriptorSize, ConfigDescriptorData) != AUDIO_ENUMERROR_NoError)
	{
		puts_P(PSTR("Attached Device Not a Valid Audio Output Device.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
	{
		puts_P(PSTR("Error Setting Device Configuration.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	if (Audio_Host_StartStopStreaming(&Speaker_Audio_Interface, true) != HOST_SENDCONTROL_Successful)
	{
		puts_P(PSTR("Error Enabling Audio Stream.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}
	
	USB_Audio_SampleFreq_t SampleRate = AUDIO_SAMPLE_FREQ(48000);
	if (Audio_Host_GetSetEndpointProperty(&Speaker_Audio_Interface, Speaker_Audio_Interface.Config.DataOUTPipeNumber,
	                                      AUDIO_REQ_SetCurrent, AUDIO_EPCONTROL_SamplingFreq,
	                                      sizeof(SampleRate), &SampleRate) != HOST_SENDCONTROL_Successful)
	{
		puts_P(PSTR("Error Setting Audio Sampling Frequency.\r\n"));
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	/* Sample reload timer initialization */
	TIMSK0  = (1 << OCIE0A);
	OCR0A   = ((F_CPU / 8 / 48000) - 1);
	TCCR0A  = (1 << WGM01);  // CTC mode
	TCCR0B  = (1 << CS01);   // Fcpu/8 speed

	puts_P(PSTR("Audio Device Enumerated.\r\n"));
	LEDs_SetAllLEDs(LEDMASK_USB_READY);
}
예제 #2
0
            .Type = DTYPE_CSInterface
        },
        .Subtype                  = AUDIO_DSUBTYPE_CSInterface_FormatType,

        .FormatType               = 0x01,
        .Channels                 = 0x01,

        .SubFrameSize             = 0x02,
        .BitResolution            = 16,

        .TotalDiscreteSampleRates = (sizeof(ConfigurationDescriptor.Audio_AudioFormatSampleRates) / sizeof(USB_Audio_SampleFreq_t)),
    },

    .Audio_AudioFormatSampleRates =
    {
        AUDIO_SAMPLE_FREQ(8000),
        AUDIO_SAMPLE_FREQ(11025),
        AUDIO_SAMPLE_FREQ(22050),
        AUDIO_SAMPLE_FREQ(44100),
        AUDIO_SAMPLE_FREQ(48000),
    },

    .Audio_StreamEndpoint =
    {
        .Endpoint =
        {
            .Header              = {.Size = sizeof(USB_Audio_Descriptor_StreamEndpoint_Std_t), .Type = DTYPE_Endpoint},

            .EndpointAddress     = (ENDPOINT_DESCRIPTOR_DIR_IN | AUDIO_STREAM_EPNUM),
            .Attributes          = (EP_TYPE_ISOCHRONOUS | ENDPOINT_ATTR_SYNC | ENDPOINT_USAGE_DATA),
            .EndpointSize        = AUDIO_STREAM_EPSIZE,
예제 #3
0
/** Main program entry point. This routine configures the hardware required by the application, then
 *  enters a loop to run the application tasks in sequence.
 */
int main(void)
{
	SetupHardware();

	puts_P(PSTR(ESC_FG_CYAN "Audio Output Host Demo running.\r\n" ESC_FG_WHITE));

	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
	sei();

	for (;;)
	{
		switch (USB_HostState)
		{
			case HOST_STATE_Addressed:
				LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);

				uint16_t ConfigDescriptorSize;
				uint8_t  ConfigDescriptorData[512];

				if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
				                                       sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
				{
					puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
					LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
					USB_HostState = HOST_STATE_WaitForDeviceRemoval;
					break;
				}

				if (Audio_Host_ConfigurePipes(&Speaker_Audio_Interface,
				                              ConfigDescriptorSize, ConfigDescriptorData) != AUDIO_ENUMERROR_NoError)
				{
					puts_P(PSTR("Attached Device Not a Valid Audio Output Device.\r\n"));
					LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
					USB_HostState = HOST_STATE_WaitForDeviceRemoval;
					break;
				}

				if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
				{
					puts_P(PSTR("Error Setting Device Configuration.\r\n"));
					LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
					USB_HostState = HOST_STATE_WaitForDeviceRemoval;
					break;
				}

				if (Audio_Host_StartStopStreaming(&Speaker_Audio_Interface, true) != HOST_SENDCONTROL_Successful)
				{
					puts_P(PSTR("Error Enabling Audio Stream.\r\n"));
					LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
					USB_HostState = HOST_STATE_WaitForDeviceRemoval;
					break;
				}
				
				USB_Audio_SampleFreq_t SampleRate = AUDIO_SAMPLE_FREQ(48000);
				if (Audio_Host_GetSetEndpointProperty(&Speaker_Audio_Interface, Speaker_Audio_Interface.Config.DataOUTPipeNumber,
				                                      AUDIO_REQ_SetCurrent, AUDIO_EPCONTROL_SamplingFreq,
				                                      sizeof(SampleRate), &SampleRate) != HOST_SENDCONTROL_Successful)
				{
					puts_P(PSTR("Error Setting Audio Sampling Frequency.\r\n"));
					LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
					USB_HostState = HOST_STATE_WaitForDeviceRemoval;
					break;				
				}

				/* Sample reload timer initialization */
				TIMSK0  = (1 << OCIE0A);
				OCR0A   = ((F_CPU / 8 / 48000) - 1);
				TCCR0A  = (1 << WGM01);  // CTC mode
				TCCR0B  = (1 << CS01);   // Fcpu/8 speed

				puts_P(PSTR("Audio Device Enumerated.\r\n"));
				LEDs_SetAllLEDs(LEDMASK_USB_READY);
				USB_HostState = HOST_STATE_Configured;
				break;
			case HOST_STATE_Configured:
				/* Do nothing - audio stream is handled by the timer interrupt routine */
				break;
		}

		Audio_Host_USBTask(&Speaker_Audio_Interface);
		USB_USBTask();
	}
}
예제 #4
0
			.AudioFormat              = 0x0001
		},

	.Audio_AudioFormat =
		{
			.Header                   = {.Size = sizeof(USB_Audio_Descriptor_Format_t), .Type = DTYPE_CSInterface},
			.Subtype                  = AUDIO_DSUBTYPE_CSInterface_FormatType,

			.FormatType               = 0x01,
			.Channels                 = 0x01,

			.SubFrameSize             = 0x02,
			.BitResolution            = 16,
			.SampleFrequencyType      = AUDIO_TOTAL_SAMPLE_RATES,

			.SampleFrequencies        = {AUDIO_SAMPLE_FREQ(AUDIO_SAMPLE_FREQUENCY)}
		},

	.Audio_StreamEndpoint =
		{
			.Endpoint =
				{
					.Header              = {.Size = sizeof(USB_Audio_Descriptor_StreamEndpoint_Std_t), .Type = DTYPE_Endpoint},

					.EndpointAddress     = (ENDPOINT_DESCRIPTOR_DIR_IN | AUDIO_STREAM_EPNUM),
					.Attributes          = (EP_TYPE_ISOCHRONOUS | ENDPOINT_ATTR_SYNC | ENDPOINT_USAGE_DATA),
					.EndpointSize        = AUDIO_STREAM_EPSIZE,
					.PollingIntervalMS   = 0x01
				},

			.Refresh                  = 0,
/** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 *  enumerated by the host and is now ready to be used by the application.
 */
void EVENT_USB_Host_DeviceEnumerationComplete(void)
{
	puts_P(PSTR("Getting Config Data.\r\n"));

	uint8_t ErrorCode;

	/* Get and process the configuration descriptor data */
	if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
	{
		if (ErrorCode == ControlError)
		  puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
		else
		  puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));

		printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);

		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	/* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
	if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
	{
		printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
		                         " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);

		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		return;
	}

	if ((ErrorCode = USB_Host_SetInterfaceAltSetting(StreamingInterfaceIndex,
	                                                 StreamingInterfaceAltSetting)) != HOST_SENDCONTROL_Successful)
	{
		printf_P(PSTR(ESC_FG_RED "Could not set alternative streaming interface setting.\r\n"
		                         " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);

		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	USB_ControlRequest = (USB_Request_Header_t)
		{
			.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT),
			.bRequest      = AUDIO_REQ_SetCurrent,
			.wValue        = (AUDIO_EPCONTROL_SamplingFreq << 8),
			.wIndex        = StreamingEndpointAddress,
			.wLength       = sizeof(USB_Audio_SampleFreq_t),
		};

	USB_Audio_SampleFreq_t SampleRate = AUDIO_SAMPLE_FREQ(48000);

	/* Select the control pipe for the request transfer */
	Pipe_SelectPipe(PIPE_CONTROLPIPE);

	/* Set the sample rate on the streaming interface endpoint */
	if ((ErrorCode = USB_Host_SendControlRequest(&SampleRate)) != HOST_SENDCONTROL_Successful)
	{
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
		USB_Host_SetDeviceConfiguration(0);
		return;
	}

	/* Sample reload timer initialization */
	TIMSK0  = (1 << OCIE0A);
	OCR0A   = ((F_CPU / 8 / 48000) - 1);
	TCCR0A  = (1 << WGM01);  // CTC mode
	TCCR0B  = (1 << CS01);   // Fcpu/8 speed

	puts_P(PSTR("Speaker Enumerated.\r\n"));
	LEDs_SetAllLEDs(LEDMASK_USB_READY);
}

/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
{
	USB_Disable();

	printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
	                         " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);

	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
	for(;;);
}
예제 #6
0
 0x01,                                 /* bTerminalLink */
 0x01,                                 /* bDelay */
 0x01,                                 /* wFormatTag AUDIO_FORMAT_PCM  0x0001*/
 0x00,
 /* 07 byte*/
 
 /* USB Speaker Audio Type III Format Interface Descriptor */
 0x0B,                                 /* bLength */
 AUDIO_INTERFACE_DESCRIPTOR_TYPE,      /* bDescriptorType */
 AUDIO_STREAMING_FORMAT_TYPE,          /* bDescriptorSubtype */
 AUDIO_FORMAT_TYPE_III,                /* bFormatType */ 
 0x02,                                 /* bNrChannels */
 0x02,                                 /* bSubFrameSize :  2 Bytes per frame (16bits) */
 16,                                   /* bBitResolution (16-bits per sample) */ 
 0x01,                                 /* bSamFreqType only one frequency supported */ 
 AUDIO_SAMPLE_FREQ(USBD_AUDIO_FREQ),         /* Audio sampling frequency coded on 3 bytes */
 /* 11 byte*/
 
 /* Endpoint 1 - Standard Descriptor */
 AUDIO_STANDARD_ENDPOINT_DESC_SIZE,    /* bLength */
 USB_DESC_TYPE_ENDPOINT,               /* bDescriptorType */
 AUDIO_OUT_EP,                         /* bEndpointAddress 1 out endpoint*/
 USBD_EP_TYPE_ISOC,                    /* bmAttributes */
 AUDIO_PACKET_SZE(USBD_AUDIO_FREQ),    /* wMaxPacketSize in Bytes (Freq(Samples)*2(Stereo)*2(HalfWord)) */
 0x01,                                 /* bInterval */
 0x00,                                 /* bRefresh */
 0x00,                                 /* bSynchAddress */
 /* 09 byte*/
 
 /* Endpoint - Audio Streaming Descriptor*/
 AUDIO_STREAMING_ENDPOINT_DESC_SIZE,   /* bLength */