Commit 1a25b6f5 authored by Dean Camera's avatar Dean Camera
Browse files

Update the Low Level Audio Input and Audio Output demos to support multiple sample rates.

Remove custom PIDs on the Class Driver Audio device demos and revert back to the original Audio PIDs, as the low level and class driver demo versions are now descriptor compatible once again.
parent 7dffa15c
......@@ -52,7 +52,7 @@ USB_ClassInfo_Audio_Device_t Microphone_Audio_Interface =
};
/** Current audio sampling frequency of the streaming audio endpoint. */
uint32_t CurrentAudioSampleFrequency = 48000;
static uint32_t CurrentAudioSampleFrequency = 48000;
/** Main program entry point. This routine contains the overall program flow, including initial
......
......@@ -54,8 +54,8 @@ const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
.Endpoint0Size = FIXED_CONTROL_ENDPOINT_SIZE,
.VendorID = 0x03EB,
.ProductID = 0x206B,
.ReleaseNumber = VERSION_BCD(00.01),
.ProductID = 0x2047,
.ReleaseNumber = VERSION_BCD(00.02),
.ManufacturerStrIndex = 0x01,
.ProductStrIndex = 0x02,
......
......@@ -52,7 +52,7 @@ USB_ClassInfo_Audio_Device_t Speaker_Audio_Interface =
};
/** Current audio sampling frequency of the streaming audio endpoint. */
uint32_t CurrentAudioSampleFrequency = 48000;
static uint32_t CurrentAudioSampleFrequency = 48000;
/** Main program entry point. This routine contains the overall program flow, including initial
......
......@@ -54,8 +54,8 @@ const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
.Endpoint0Size = FIXED_CONTROL_ENDPOINT_SIZE,
.VendorID = 0x03EB,
.ProductID = 0x206C,
.ReleaseNumber = VERSION_BCD(00.01),
.ProductID = 0x2046,
.ReleaseNumber = VERSION_BCD(00.02),
.ManufacturerStrIndex = 0x01,
.ProductStrIndex = 0x02,
......
......@@ -39,6 +39,9 @@
/** Flag to indicate if the streaming audio alternative interface has been selected by the host. */
static bool StreamingAudioInterfaceSelected = false;
/** Current audio sampling frequency of the streaming audio endpoint. */
static uint32_t CurrentAudioSampleFrequency = 48000;
/** Main program entry point. This routine contains the overall program flow, including initial
* setup of all components and the main program loop.
......@@ -87,7 +90,7 @@ void EVENT_USB_Device_Connect(void)
/* Sample reload timer initialization */
TIMSK0 = (1 << OCIE0A);
OCR0A = ((F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1);
OCR0A = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1);
TCCR0A = (1 << WGM01); // CTC mode
TCCR0B = (1 << CS01); // Fcpu/8 speed
}
......@@ -152,6 +155,57 @@ void EVENT_USB_Device_ControlRequest(void)
Endpoint_ClearSETUP();
Endpoint_ClearStatusStage();
}
break;
case AUDIO_REQ_SetCurrent:
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT))
{
/* Extract out the relevant request information to get the target Endpoint index and control being set */
uint8_t EndpointIndex = (uint8_t)USB_ControlRequest.wIndex;
uint8_t EndpointControl = (USB_ControlRequest.wValue >> 8);
/* Only handle SET CURRENT requests to the audio endpoint's sample frequency property */
if ((EndpointIndex == AUDIO_STREAM_EPNUM) && (EndpointControl == AUDIO_EPCONTROL_SamplingFreq))
{
uint8_t SampleRate[3];
Endpoint_ClearSETUP();
Endpoint_Read_Control_Stream_LE(SampleRate, sizeof(SampleRate));
Endpoint_ClearOUT();
/* Set the new sampling frequency to the value given by the host */
CurrentAudioSampleFrequency = (((uint32_t)SampleRate[2] << 16) | ((uint32_t)SampleRate[1] << 8) | (uint32_t)SampleRate[0]);
/* Adjust sample reload timer to the new frequency */
OCR0A = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1);
}
}
break;
case AUDIO_REQ_GetCurrent:
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT))
{
/* Extract out the relevant request information to get the target Endpoint index and control being retrieved */
uint8_t EndpointIndex = (uint8_t)USB_ControlRequest.wIndex;
uint8_t EndpointControl = (USB_ControlRequest.wValue >> 8);
/* Only handle GET CURRENT requests to the audio endpoint's sample frequency property */
if ((EndpointIndex == AUDIO_STREAM_EPNUM) && (EndpointControl == AUDIO_EPCONTROL_SamplingFreq))
{
uint8_t SampleRate[3];
/* Convert the sampling rate value into the 24-bit format the host expects for the property */
SampleRate[2] = (CurrentAudioSampleFrequency >> 16);
SampleRate[1] = (CurrentAudioSampleFrequency >> 8);
SampleRate[0] = (CurrentAudioSampleFrequency & 0xFF);
Endpoint_ClearSETUP();
Endpoint_Write_Control_Stream_LE(SampleRate, sizeof(SampleRate));
Endpoint_ClearOUT();
}
}
break;
}
}
......
......@@ -55,7 +55,7 @@ const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
.VendorID = 0x03EB,
.ProductID = 0x2047,
.ReleaseNumber = VERSION_BCD(00.01),
.ReleaseNumber = VERSION_BCD(00.02),
.ManufacturerStrIndex = 0x01,
.ProductStrIndex = 0x02,
......@@ -201,12 +201,17 @@ const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
.SubFrameSize = 0x02,
.BitResolution = 16,
.TotalDiscreteSampleRates = 1,
.TotalDiscreteSampleRates = (sizeof(ConfigurationDescriptor.Audio_AudioFormatSampleRates) / sizeof(USB_Audio_SampleFreq_t)),
},
.Audio_AudioFormatSampleRates =
{
AUDIO_SAMPLE_FREQ(AUDIO_SAMPLE_FREQUENCY)
AUDIO_SAMPLE_FREQ(8000),
AUDIO_SAMPLE_FREQ(11025),
AUDIO_SAMPLE_FREQ(22050),
AUDIO_SAMPLE_FREQ(44100),
AUDIO_SAMPLE_FREQ(48000),
},
.Audio_StreamEndpoint =
......
......@@ -51,9 +51,6 @@
*/
#define AUDIO_STREAM_EPSIZE ENDPOINT_MAX_SIZE(AUDIO_STREAM_EPNUM)
/** Sample frequency of the data being transmitted through the streaming endpoint. */
#define AUDIO_SAMPLE_FREQUENCY 48000
/* Type Defines: */
/** Type define for the device configuration descriptor structure. This must be defined in the
* application code, as the configuration descriptor contains several sub-descriptors which
......@@ -70,7 +67,7 @@
USB_Descriptor_Interface_t Audio_StreamInterface_Alt1;
USB_Audio_Descriptor_Interface_AS_t Audio_StreamInterface_SPC;
USB_Audio_Descriptor_Format_t Audio_AudioFormat;
USB_Audio_SampleFreq_t Audio_AudioFormatSampleRates[1];
USB_Audio_SampleFreq_t Audio_AudioFormatSampleRates[5];
USB_Audio_Descriptor_StreamEndpoint_Std_t Audio_StreamEndpoint;
USB_Audio_Descriptor_StreamEndpoint_Spc_t Audio_StreamEndpoint_SPC;
} USB_Descriptor_Configuration_t;
......
......@@ -39,6 +39,9 @@
/** Flag to indicate if the streaming audio alternative interface has been selected by the host. */
static bool StreamingAudioInterfaceSelected = false;
/** Current audio sampling frequency of the streaming audio endpoint. */
static uint32_t CurrentAudioSampleFrequency = 48000;
/** Main program entry point. This routine contains the overall program flow, including initial
* setup of all components and the main program loop.
......@@ -81,7 +84,7 @@ void EVENT_USB_Device_Connect(void)
/* Sample reload timer initialization */
TIMSK0 = (1 << OCIE0A);
OCR0A = ((F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1);
OCR0A = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1);
TCCR0A = (1 << WGM01); // CTC mode
TCCR0B = (1 << CS01); // Fcpu/8 speed
......@@ -178,6 +181,57 @@ void EVENT_USB_Device_ControlRequest(void)
Endpoint_ClearSETUP();
Endpoint_ClearStatusStage();
}
break;
case AUDIO_REQ_SetCurrent:
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT))
{
/* Extract out the relevant request information to get the target Endpoint index and control being set */
uint8_t EndpointIndex = (uint8_t)USB_ControlRequest.wIndex;
uint8_t EndpointControl = (USB_ControlRequest.wValue >> 8);
/* Only handle SET CURRENT requests to the audio endpoint's sample frequency property */
if ((EndpointIndex == AUDIO_STREAM_EPNUM) && (EndpointControl == AUDIO_EPCONTROL_SamplingFreq))
{
uint8_t SampleRate[3];
Endpoint_ClearSETUP();
Endpoint_Read_Control_Stream_LE(SampleRate, sizeof(SampleRate));
Endpoint_ClearOUT();
/* Set the new sampling frequency to the value given by the host */
CurrentAudioSampleFrequency = (((uint32_t)SampleRate[2] << 16) | ((uint32_t)SampleRate[1] << 8) | (uint32_t)SampleRate[0]);
/* Adjust sample reload timer to the new frequency */
OCR0A = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1);
}
}
break;
case AUDIO_REQ_GetCurrent:
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_ENDPOINT))
{
/* Extract out the relevant request information to get the target Endpoint index and control being retrieved */
uint8_t EndpointIndex = (uint8_t)USB_ControlRequest.wIndex;
uint8_t EndpointControl = (USB_ControlRequest.wValue >> 8);
/* Only handle GET CURRENT requests to the audio endpoint's sample frequency property */
if ((EndpointIndex == AUDIO_STREAM_EPNUM) && (EndpointControl == AUDIO_EPCONTROL_SamplingFreq))
{
uint8_t SampleRate[3];
/* Convert the sampling rate value into the 24-bit format the host expects for the property */
SampleRate[2] = (CurrentAudioSampleFrequency >> 16);
SampleRate[1] = (CurrentAudioSampleFrequency >> 8);
SampleRate[0] = (CurrentAudioSampleFrequency & 0xFF);
Endpoint_ClearSETUP();
Endpoint_Write_Control_Stream_LE(SampleRate, sizeof(SampleRate));
Endpoint_ClearOUT();
}
}
break;
}
}
......
......@@ -55,7 +55,7 @@ const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
.VendorID = 0x03EB,
.ProductID = 0x2046,
.ReleaseNumber = VERSION_BCD(00.01),
.ReleaseNumber = VERSION_BCD(00.02),
.ManufacturerStrIndex = 0x01,
.ProductStrIndex = 0x02,
......@@ -202,12 +202,16 @@ const USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
.SubFrameSize = 0x02,
.BitResolution = 16,
.TotalDiscreteSampleRates = 1,
.TotalDiscreteSampleRates = (sizeof(ConfigurationDescriptor.Audio_AudioFormatSampleRates) / sizeof(USB_Audio_SampleFreq_t)),
},
.Audio_AudioFormatSampleRates =
{
AUDIO_SAMPLE_FREQ(AUDIO_SAMPLE_FREQUENCY)
AUDIO_SAMPLE_FREQ(8000),
AUDIO_SAMPLE_FREQ(11025),
AUDIO_SAMPLE_FREQ(22050),
AUDIO_SAMPLE_FREQ(44100),
AUDIO_SAMPLE_FREQ(48000),
},
.Audio_StreamEndpoint =
......
......@@ -51,9 +51,6 @@
*/
#define AUDIO_STREAM_EPSIZE ENDPOINT_MAX_SIZE(AUDIO_STREAM_EPNUM)
/** Sample frequency of the data being transmitted through the streaming endpoint. */
#define AUDIO_SAMPLE_FREQUENCY 48000
/* Type Defines: */
/** Type define for the device configuration descriptor structure. This must be defined in the
* application code, as the configuration descriptor contains several sub-descriptors which
......@@ -70,7 +67,7 @@
USB_Descriptor_Interface_t Audio_StreamInterface_Alt1;
USB_Audio_Descriptor_Interface_AS_t Audio_StreamInterface_SPC;
USB_Audio_Descriptor_Format_t Audio_AudioFormat;
USB_Audio_SampleFreq_t Audio_AudioFormatSampleRates[1];
USB_Audio_SampleFreq_t Audio_AudioFormatSampleRates[5];
USB_Audio_Descriptor_StreamEndpoint_Std_t Audio_StreamEndpoint;
USB_Audio_Descriptor_StreamEndpoint_Spc_t Audio_StreamEndpoint_SPC;
} USB_Descriptor_Configuration_t;
......
......@@ -29,7 +29,7 @@
* the supported audio sampling rates, to allow for multiple audio interfaces with different numbers of supported rates and/or
* continuous sample rates
* - Library Applications:
* - Modified the Class Driver AudioInput and AudioOutput demos to support multiple sample rates
* - Modified the Low Level and Class Driver AudioInput and AudioOutput demos to support multiple sample rates
*
* <b>Fixed:</b>
* - Core:
......@@ -1016,7 +1016,7 @@
* - Library license changed from LGPLv3 to MIT license
*
*
* \section Sec_ChangeLog151 Version 1.5.1 - Released 31st July, 2008
* \section Sec_ChangeLog151 Version 1.5.1 - Released 7th July, 2008
*
* - Changed host demos to enable the host function task on the firing of the USB_DeviceEnumerationComplete event
* rather than the USB_DeviceAttached event
......@@ -1095,7 +1095,7 @@
* - Added USE_NONSTANDARD_DESCRIPTOR_NAMES token to switch back to the non-standard descriptor element names
*
*
* \section Sec_ChangeLog141 Version 1.4.1 - Released 5 May, 2008
* \section Sec_ChangeLog141 Version 1.4.1 - Released 19 May, 2008
*
* - Enhanced KeyboardWithParser demo, now prints out pressed alphanumeric characters like the standard demo
* - Fixed MassStorage demo, read/writes using non mode-10 commands now work correctly
......
......@@ -361,7 +361,7 @@
* 0x206B
* </td>
* <td>
* Class Driver Audio Input Demo (Multiple Sample Rates)
* <i>Currently Unallocated</i>
* </td>
* </tr>
*
......@@ -373,7 +373,7 @@
* 0x206C
* </td>
* <td>
* Class Driver Audio Output Demo (Multiple Sample Rates)
* <i>Currently Unallocated</i>
* </td>
* </tr>
*
......
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