- Permission to use, copy, modify, distribute, and sell this
+ Permission to use, copy, modify, distribute, and sell this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software without specific, written prior permission.
The author disclaim all warranties with regard to this
/* Hardware Initialization */
LEDs_Init();
ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_32);
ADC_SetupChannel(MIC_IN_ADC_CHANNEL);
USB_Init();
/* Hardware Initialization */
LEDs_Init();
ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_32);
ADC_SetupChannel(MIC_IN_ADC_CHANNEL);
USB_Init();
/* Start the ADC conversion in free running mode */
ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | MIC_IN_ADC_MUX_MASK);
}
/* Start the ADC conversion in free running mode */
ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | MIC_IN_ADC_MUX_MASK);
}
/* Set Interface is not handled by the library, as its function is application-specific */
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_INTERFACE))
{
/* Set Interface is not handled by the library, as its function is application-specific */
if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_INTERFACE))
{
Endpoint_ClearStatusStage();
/* Check if the host is enabling the audio interface (setting AlternateSetting to 1) */
Endpoint_ClearStatusStage();
/* Check if the host is enabling the audio interface (setting AlternateSetting to 1) */
/* Check if the current endpoint can be written to and that the next sample should be stored */
if (Endpoint_IsINReady() && (TIFR0 & (1 << OCF0A)))
{
/* Check if the current endpoint can be written to and that the next sample should be stored */
if (Endpoint_IsINReady() && (TIFR0 & (1 << OCF0A)))
{
/* Audio sample is ADC value scaled to fit the entire range */
int16_t AudioSample = ((SAMPLE_MAX_RANGE / ADC_MAX_RANGE) * ADC_GetResult());
/* Audio sample is ADC value scaled to fit the entire range */
int16_t AudioSample = ((SAMPLE_MAX_RANGE / ADC_MAX_RANGE) * ADC_GetResult());
#if defined(MICROPHONE_BIASED_TO_HALF_RAIL)
/* Microphone is biased to half rail voltage, subtract the bias from the sample value */
AudioSample -= (SAMPLE_MAX_RANGE / 2);
#if defined(MICROPHONE_BIASED_TO_HALF_RAIL)
/* Microphone is biased to half rail voltage, subtract the bias from the sample value */
AudioSample -= (SAMPLE_MAX_RANGE / 2);