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[pub/USBasp.git] / Demos / Host / LowLevel / AudioOutputHost / AudioOutputHost.c

diff --git a/Demos/Host/LowLevel/AudioOutputHost/AudioOutputHost.c b/Demos/Host/LowLevel/AudioOutputHost/AudioOutputHost.c
index 704ddea..c77d7fd 100644 (file)
--- a/Demos/Host/LowLevel/AudioOutputHost/AudioOutputHost.c
+++ b/Demos/Host/LowLevel/AudioOutputHost/AudioOutputHost.c
@@ -68,7 +68,7 @@ void SetupHardware(void)
        Serial_Init(9600, false);
        Buttons_Init();
        ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_32);
-       ADC_SetupChannel(MIC_IN_ADC_CHANNEL);   
+       ADC_SetupChannel(MIC_IN_ADC_CHANNEL);
        LEDs_Init();
        USB_Init();
 
@@ -126,7 +126,7 @@ void EVENT_USB_Host_DeviceEnumerationComplete(void)
                LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
                return;
        }
-       
+
        if ((ErrorCode = USB_Host_SetInterfaceAltSetting(StreamingInterfaceIndex,
                                                         StreamingInterfaceAltSetting)) != HOST_SENDCONTROL_Successful)
        {
@@ -146,7 +146,7 @@ void EVENT_USB_Host_DeviceEnumerationComplete(void)
                        .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 */
@@ -164,8 +164,8 @@ void EVENT_USB_Host_DeviceEnumerationComplete(void)
        TIMSK0  = (1 << OCIE0A);
        OCR0A   = ((F_CPU / 8 / 48000) - 1);
        TCCR0A  = (1 << WGM01);  // CTC mode
-       TCCR0B  = (1 << CS01);   // Fcpu/8 speed        
-       
+       TCCR0B  = (1 << CS01);   // Fcpu/8 speed
+
        puts_P(PSTR("Speaker Enumerated.\r\n"));
        LEDs_SetAllLEDs(LEDMASK_USB_READY);
 }
@@ -207,16 +207,16 @@ ISR(TIMER0_COMPA_vect, ISR_BLOCK)
        /* Check if the current pipe can be written to (device ready for more data) */
        if (Pipe_IsOUTReady())
        {
-               int16_t AudioSample;            
-       
+               int16_t AudioSample;
+
                #if defined(USE_TEST_TONE)
                        static uint8_t SquareWaveSampleCount;
                        static int16_t CurrentWaveValue;
-                       
+
                        /* In test tone mode, generate a square wave at 1/256 of the sample rate */
                        if (SquareWaveSampleCount++ == 0xFF)
                          CurrentWaveValue ^= 0x8000;
-                       
+
                        /* Only generate audio if the board button is being pressed */
                        AudioSample = (Buttons_GetStatus() & BUTTONS_BUTTON1) ? CurrentWaveValue : 0;
                #else
@@ -226,12 +226,12 @@ ISR(TIMER0_COMPA_vect, ISR_BLOCK)
                        #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);
-                       #endif          
+                       #endif
                #endif
-               
+
                Pipe_Write_16_LE(AudioSample);
                Pipe_Write_16_LE(AudioSample);
-               
+
                if (!(Pipe_IsReadWriteAllowed()))
                  Pipe_ClearOUT();
        }
@@ -239,3 +239,4 @@ ISR(TIMER0_COMPA_vect, ISR_BLOCK)
        Pipe_Freeze();
        Pipe_SelectPipe(PrevPipe);
 }
+