Oops - fix broken SPI driver due to missing bit inversion on a port mask.

[pub/USBasp.git] / Demos / Device / LowLevel / AudioInput / AudioInput.c

diff --git a/Demos/Device/LowLevel/AudioInput/AudioInput.c b/Demos/Device/LowLevel/AudioInput/AudioInput.c
index 4abc174..e681f3b 100644 (file)
--- a/Demos/Device/LowLevel/AudioInput/AudioInput.c
+++ b/Demos/Device/LowLevel/AudioInput/AudioInput.c
@@ -1,7 +1,7 @@
 /*
              LUFA Library
      Copyright (C) Dean Camera, 2010.
 /*
              LUFA Library
      Copyright (C) Dean Camera, 2010.

-              
+

   dean [at] fourwalledcubicle [dot] com
       www.fourwalledcubicle.com
 */
   dean [at] fourwalledcubicle [dot] com
       www.fourwalledcubicle.com
 */


@@ -9,13 +9,13 @@
 /*
   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
 
 /*
   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
 

-  Permission to use, copy, modify, distribute, and sell this 
+  Permission to use, copy, modify, distribute, and sell this

   software and its documentation for any purpose is hereby granted
   software and its documentation for any purpose is hereby granted

-  without fee, provided that the above copyright notice appear in 
+  without fee, provided that the above copyright notice appear in

   all copies and that both that the copyright notice and this
   all copies and that both that the copyright notice and 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


@@ -48,7 +48,7 @@ int main(void)
 
        LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
        sei();
 
        LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
        sei();

-       
+

        for (;;)
        {
                USB_Audio_Task();
        for (;;)
        {
                USB_Audio_Task();


@@ -65,13 +65,14 @@ void SetupHardware(void)
 
        /* Disable clock division */
        clock_prescale_set(clock_div_1);
 
        /* Disable clock division */
        clock_prescale_set(clock_div_1);

-       
+

        /* Hardware Initialization */
        LEDs_Init();
        /* Hardware Initialization */
        LEDs_Init();

+       Buttons_Init();

        ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_32);
        ADC_SetupChannel(MIC_IN_ADC_CHANNEL);
        USB_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);
 }


@@ -133,7 +134,7 @@ void EVENT_USB_Device_UnhandledControlRequest(void)
                        /* 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_ClearSETUP();                          
+                               Endpoint_ClearSETUP();

                                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) */


@@ -157,20 +158,34 @@ void USB_Audio_Task(void)
 
        /* Select the audio stream endpoint */
        Endpoint_SelectEndpoint(AUDIO_STREAM_EPNUM);
 
        /* Select the audio stream endpoint */
        Endpoint_SelectEndpoint(AUDIO_STREAM_EPNUM);

-       
+

        /* Check if the current endpoint can be written to and that the next sample should be stored */
        if (Endpoint_IsINReady() && (TIFR0 & (1 << OCF0A)))
        {
                /* Clear the sample reload timer */
                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)))
        {
                /* Clear the sample reload timer */
                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());
-               
-               #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
+               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
+                       /* Audio sample is ADC value scaled to fit the entire range */
+                       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);
+                       #endif          
+               #end if

 
                /* Write the sample to the buffer */
                Endpoint_Write_Word_LE(AudioSample);
 
                /* Write the sample to the buffer */
                Endpoint_Write_Word_LE(AudioSample);


@@ -183,3 +198,4 @@ void USB_Audio_Task(void)
                }
        }
 }
                }
        }
 }

+