Fixed programming errors in the AVRISP-MKII project when the programming packet is...

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

diff --git a/Demos/Device/ClassDriver/AudioInput/AudioInput.c b/Demos/Device/ClassDriver/AudioInput/AudioInput.c
index 32caffc..9c9b79d 100644 (file)
--- a/Demos/Device/ClassDriver/AudioInput/AudioInput.c
+++ b/Demos/Device/ClassDriver/AudioInput/AudioInput.c
@@ -1,21 +1,21 @@
 /*
              LUFA Library
 /*
              LUFA Library

-     Copyright (C) Dean Camera, 2010.
-              
+     Copyright (C) Dean Camera, 2011.
+

   dean [at] fourwalledcubicle [dot] com
   dean [at] fourwalledcubicle [dot] com

-      www.fourwalledcubicle.com
+           www.lufa-lib.org

 */
 
 /*
 */
 
 /*

-  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2011  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


@@ -60,11 +60,9 @@ int main(void)
 
        LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
        sei();
 
        LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
        sei();

-       
+

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

-               ProcessNextSample();
-

                Audio_Device_USBTask(&Microphone_Audio_Interface);
                USB_USBTask();
        }
                Audio_Device_USBTask(&Microphone_Audio_Interface);
                USB_USBTask();
        }


@@ -79,38 +77,52 @@ 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();

-       USB_Init();
+       Buttons_Init();

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

-/** Processes the next audio sample by reading the last ADC conversion and writing it to the audio
- *  interface, each time the sample reload timer period elapses to give a constant sample rate.
- */
-void ProcessNextSample(void)
+/** ISR to handle the reloading of the data endpoint with the next sample. */
+ISR(TIMER0_COMPA_vect, ISR_BLOCK)

 {
 {

+       uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();
+

        /* Check if the sample reload timer period has elapsed, and that the USB bus is ready for a new sample */
        /* Check if the sample reload timer period has elapsed, and that the USB bus is ready for a new sample */

-       if ((TIFR0 & (1 << OCF0A)) && Audio_Device_IsReadyForNextSample(&Microphone_Audio_Interface))
+       if (Audio_Device_IsReadyForNextSample(&Microphone_Audio_Interface))

        {
        {

-               /* Clear the sample reload timer compare flag, ready for the next interval */
-               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);
+               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

                #endif
                #endif

-
+               

                Audio_Device_WriteSample16(&Microphone_Audio_Interface, AudioSample);
        }
                Audio_Device_WriteSample16(&Microphone_Audio_Interface, AudioSample);
        }

+
+       Endpoint_SelectEndpoint(PrevEndpoint);

 }
 
 /** Event handler for the library USB Connection event. */
 }
 
 /** Event handler for the library USB Connection event. */


@@ -119,7 +131,8 @@ void EVENT_USB_Device_Connect(void)
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 
        /* Sample reload timer initialization */
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 
        /* Sample reload timer initialization */

-       OCR0A   = (F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1;
+       TIMSK0  = (1 << OCIE0A);
+       OCR0A   = ((F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1);

        TCCR0A  = (1 << WGM01);  // CTC mode
        TCCR0B  = (1 << CS01);   // Fcpu/8 speed
 }
        TCCR0A  = (1 << WGM01);  // CTC mode
        TCCR0B  = (1 << CS01);   // Fcpu/8 speed
 }


@@ -136,14 +149,16 @@ void EVENT_USB_Device_Disconnect(void)
 /** Event handler for the library USB Configuration Changed event. */
 void EVENT_USB_Device_ConfigurationChanged(void)
 {
 /** Event handler for the library USB Configuration Changed event. */
 void EVENT_USB_Device_ConfigurationChanged(void)
 {

-       LEDs_SetAllLEDs(LEDMASK_USB_READY);
-       
-       if (!(Audio_Device_ConfigureEndpoints(&Microphone_Audio_Interface)))
-         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+       bool ConfigSuccess = true;
+
+       ConfigSuccess &= Audio_Device_ConfigureEndpoints(&Microphone_Audio_Interface);
+
+       LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);

 }
 
 }
 

-/** Event handler for the library USB Unhandled Control Request event. */
-void EVENT_USB_Device_UnhandledControlRequest(void)
+/** Event handler for the library USB Control Request reception event. */
+void EVENT_USB_Device_ControlRequest(void)

 {
        Audio_Device_ProcessControlRequest(&Microphone_Audio_Interface);
 }
 {
        Audio_Device_ProcessControlRequest(&Microphone_Audio_Interface);
 }

+