Changed AudioInput and AudioOutput demos to reload the next sample via an interrupt...

diff --git a/Demos/Device/ClassDriver/AudioInput/AudioInput.c b/Demos/Device/ClassDriver/AudioInput/AudioInput.c
index 54e70f6..ec81050 100644 (file)
--- a/Demos/Device/ClassDriver/AudioInput/AudioInput.c
+++ b/Demos/Device/ClassDriver/AudioInput/AudioInput.c
@@ -63,8 +63,6 @@ int main(void)
 
        for (;;)
        {
 
        for (;;)
        {

-               ProcessNextSample();
-

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


@@ -91,17 +89,14 @@ void SetupHardware(void)
        ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | MIC_IN_ADC_MUX_MASK);
 }
 
        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);
-               

                int16_t AudioSample;
 
                #if defined(USE_TEST_TONE)
                int16_t AudioSample;
 
                #if defined(USE_TEST_TONE)


@@ -126,6 +121,8 @@ void ProcessNextSample(void)
                
                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. */


@@ -134,6 +131,7 @@ void EVENT_USB_Device_Connect(void)
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 
        /* Sample reload timer initialization */
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 
        /* Sample reload timer initialization */

+       TIMSK0  = (1 << OCIE0A);

        OCR0A   = (F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1;
        TCCR0A  = (1 << WGM01);  // CTC mode
        TCCR0B  = (1 << CS01);   // Fcpu/8 speed
        OCR0A   = (F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1;
        TCCR0A  = (1 << WGM01);  // CTC mode
        TCCR0B  = (1 << CS01);   // Fcpu/8 speed

diff --git a/Demos/Device/ClassDriver/AudioInput/AudioInput.h b/Demos/Device/ClassDriver/AudioInput/AudioInput.h
index a243333..6480b56 100644 (file)
--- a/Demos/Device/ClassDriver/AudioInput/AudioInput.h
+++ b/Demos/Device/ClassDriver/AudioInput/AudioInput.h
@@ -77,7 +77,6 @@
 
        /* Function Prototypes: */
                void SetupHardware(void);
 
        /* Function Prototypes: */
                void SetupHardware(void);

-               void ProcessNextSample(void);

 
                void EVENT_USB_Device_Connect(void);
                void EVENT_USB_Device_Disconnect(void);
 
                void EVENT_USB_Device_Connect(void);
                void EVENT_USB_Device_Disconnect(void);

diff --git a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
index 33b52a1..4638379 100644 (file)
--- a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
+++ b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
@@ -63,8 +63,6 @@ int main(void)
 
        for (;;)
        {
 
        for (;;)
        {

-               ProcessNextSample();
-

                Audio_Device_USBTask(&Speaker_Audio_Interface);
                USB_USBTask();
        }
                Audio_Device_USBTask(&Speaker_Audio_Interface);
                USB_USBTask();
        }


@@ -85,35 +83,31 @@ void SetupHardware(void)
        USB_Init();
 }
 
        USB_Init();
 }
 

-/** 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 PWM timer with the next sample. */
+ISR(TIMER0_COMPA_vect, ISR_BLOCK)

 {
 {

-       /* 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_IsSampleReceived(&Speaker_Audio_Interface))
-       {
-               /* Clear the sample reload timer compare flag, ready for the next interval */
-               TIFR0 |= (1 << OCF0A);
+       uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();

 
 

+       if (Audio_Device_IsSampleReceived(&Speaker_Audio_Interface))
+       {

                /* Retrieve the signed 16-bit left and right audio samples, convert to 8-bit */
                /* Retrieve the signed 16-bit left and right audio samples, convert to 8-bit */

-               int8_t  LeftSample_8Bit   = (Audio_Device_ReadSample16(&Speaker_Audio_Interface) >> 8);
-               int8_t  RightSample_8Bit  = (Audio_Device_ReadSample16(&Speaker_Audio_Interface) >> 8);
+               int8_t LeftSample_8Bit  = (Audio_Device_ReadSample16(&Speaker_Audio_Interface) >> 8);
+               int8_t RightSample_8Bit = (Audio_Device_ReadSample16(&Speaker_Audio_Interface) >> 8);

 
                /* Mix the two channels together to produce a mono, 8-bit sample */
 
                /* Mix the two channels together to produce a mono, 8-bit sample */

-               int8_t  MixedSample_8Bit  = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);
+               int8_t MixedSample_8Bit = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);

 
 

-#if defined(AUDIO_OUT_MONO)
+               #if defined(AUDIO_OUT_MONO)

                /* Load the sample into the PWM timer channel */
                OCR3A = (MixedSample_8Bit ^ (1 << 7));
                /* Load the sample into the PWM timer channel */
                OCR3A = (MixedSample_8Bit ^ (1 << 7));

-#elif defined(AUDIO_OUT_STEREO)
+               #elif defined(AUDIO_OUT_STEREO)

                /* Load the dual 8-bit samples into the PWM timer channels */
                OCR3A = (LeftSample_8Bit  ^ (1 << 7));
                OCR3B = (RightSample_8Bit ^ (1 << 7));
                /* Load the dual 8-bit samples into the PWM timer channels */
                OCR3A = (LeftSample_8Bit  ^ (1 << 7));
                OCR3B = (RightSample_8Bit ^ (1 << 7));

-#elif defined(AUDIO_OUT_PORTC)
+               #elif defined(AUDIO_OUT_PORTC)

                /* Load the 8-bit mixed sample into PORTC */
                PORTC = MixedSample_8Bit;
                /* Load the 8-bit mixed sample into PORTC */
                PORTC = MixedSample_8Bit;

-#endif
+               #endif

 
                uint8_t LEDMask = LEDS_NO_LEDS;
 
 
                uint8_t LEDMask = LEDS_NO_LEDS;
 


@@ -129,6 +123,8 @@ void ProcessNextSample(void)
 
                LEDs_SetAllLEDs(LEDMask);
        }
 
                LEDs_SetAllLEDs(LEDMask);
        }

+       
+       Endpoint_SelectEndpoint(PrevEndpoint);  

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


@@ -137,27 +133,28 @@ void EVENT_USB_Device_Connect(void)
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 
        /* Sample reload timer initialization */
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 
        /* Sample reload timer initialization */

+       TIMSK0  = (1 << OCIE0A);

        OCR0A   = (F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1;
        TCCR0A  = (1 << WGM01);  // CTC mode
        TCCR0B  = (1 << CS01);   // Fcpu/8 speed
 
        OCR0A   = (F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1;
        TCCR0A  = (1 << WGM01);  // CTC mode
        TCCR0B  = (1 << CS01);   // Fcpu/8 speed
 

-#if defined(AUDIO_OUT_MONO)
+       #if defined(AUDIO_OUT_MONO)

        /* Set speaker as output */
        DDRC   |= (1 << 6);
        /* Set speaker as output */
        DDRC   |= (1 << 6);

-#elif defined(AUDIO_OUT_STEREO)
+       #elif defined(AUDIO_OUT_STEREO)

        /* Set speakers as outputs */
        DDRC   |= ((1 << 6) | (1 << 5));
        /* Set speakers as outputs */
        DDRC   |= ((1 << 6) | (1 << 5));

-#elif defined(AUDIO_OUT_PORTC)
+       #elif defined(AUDIO_OUT_PORTC)

        /* Set PORTC as outputs */
        DDRC   |= 0xFF;
        /* Set PORTC as outputs */
        DDRC   |= 0xFF;

-#endif
+       #endif

 
 

-#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
+       #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))

        /* PWM speaker timer initialization */
        TCCR3A  = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3A0)
                | (1 << COM3B1) | (1 << COM3B0)); // Set on match, clear on TOP
        TCCR3B  = ((1 << WGM32) | (1 << CS30));  // Fast 8-Bit PWM, F_CPU speed
        /* PWM speaker timer initialization */
        TCCR3A  = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3A0)
                | (1 << COM3B1) | (1 << COM3B0)); // Set on match, clear on TOP
        TCCR3B  = ((1 << WGM32) | (1 << CS30));  // Fast 8-Bit PWM, F_CPU speed

-#endif
+       #endif

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


@@ -168,21 +165,21 @@ void EVENT_USB_Device_Disconnect(void)
        /* Stop the sample reload timer */
        TCCR0B = 0;
 
        /* Stop the sample reload timer */
        TCCR0B = 0;
 

-#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
+       #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))

        /* Stop the PWM generation timer */
        TCCR3B = 0;
        /* Stop the PWM generation timer */
        TCCR3B = 0;

-#endif
+       #endif

 
 

-#if defined(AUDIO_OUT_MONO)
+       #if defined(AUDIO_OUT_MONO)

        /* Set speaker as input to reduce current draw */
        /* Set speaker as input to reduce current draw */

-       DDRC   &= ~(1 << 6);
-#elif defined(AUDIO_OUT_STEREO)
+       DDRC  &= ~(1 << 6);
+       #elif defined(AUDIO_OUT_STEREO)

        /* Set speakers as inputs to reduce current draw */
        /* Set speakers as inputs to reduce current draw */

-       DDRC   &= ~((1 << 6) | (1 << 5));
-#elif defined(AUDIO_OUT_PORTC)
+       DDRC  &= ~((1 << 6) | (1 << 5));
+       #elif defined(AUDIO_OUT_PORTC)

        /* Set PORTC low */
        /* Set PORTC low */

-       PORTC  = 0x00;
-#endif
+       PORTC = 0x00;
+       #endif

 }
 
 /** Event handler for the library USB Configuration Changed event. */
 }
 
 /** Event handler for the library USB Configuration Changed event. */

diff --git a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.h b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.h
index c03a820..825af68 100644 (file)
--- a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.h
+++ b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.h
@@ -64,7 +64,6 @@
 
        /* Function Prototypes: */
                void SetupHardware(void);
 
        /* Function Prototypes: */
                void SetupHardware(void);

-               void ProcessNextSample(void);

 
                void EVENT_USB_Device_Connect(void);
                void EVENT_USB_Device_Disconnect(void);
 
                void EVENT_USB_Device_Connect(void);
                void EVENT_USB_Device_Disconnect(void);

diff --git a/Demos/Device/LowLevel/AudioInput/AudioInput.c b/Demos/Device/LowLevel/AudioInput/AudioInput.c
index 8e2d974..9257806 100644 (file)
--- a/Demos/Device/LowLevel/AudioInput/AudioInput.c
+++ b/Demos/Device/LowLevel/AudioInput/AudioInput.c
@@ -51,7 +51,6 @@ int main(void)
 
        for (;;)
        {
 
        for (;;)
        {

-               USB_Audio_Task();

                USB_USBTask();
        }
 }
                USB_USBTask();
        }
 }


@@ -86,6 +85,7 @@ void EVENT_USB_Device_Connect(void)
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 
        /* Sample reload timer initialization */
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 
        /* Sample reload timer initialization */

+       TIMSK0  = (1 << OCIE0A);

        OCR0A   = (F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1;
        TCCR0A  = (1 << WGM01);  // CTC mode
        TCCR0B  = (1 << CS01);   // Fcpu/8 speed
        OCR0A   = (F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1;
        TCCR0A  = (1 << WGM01);  // CTC mode
        TCCR0B  = (1 << CS01);   // Fcpu/8 speed


@@ -145,26 +145,17 @@ void EVENT_USB_Device_UnhandledControlRequest(void)
        }
 }
 
        }
 }
 

-/** Task to manage the Audio interface, reading in ADC samples from the microphone, and them to the host. */
-void USB_Audio_Task(void)
+/** ISR to handle the reloading of the data endpoint with the next sample. */
+ISR(TIMER0_COMPA_vect, ISR_BLOCK)

 {
 {

-       /* Device must be connected and configured for the task to run */
-       if (USB_DeviceState != DEVICE_STATE_Configured)
-         return;
-
-       /* Check to see if the streaming interface is selected, if not the host is not receiving audio */
-       if (!(StreamingAudioInterfaceSelected))
-         return;
+       uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();

 
        /* 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)))
+       /* Check if the current endpoint can be written to and that the audio interface is enabled */
+       if (Endpoint_IsINReady() && StreamingAudioInterfaceSelected)

        {
        {

-               /* Clear the sample reload timer */
-               TIFR0 |= (1 << OCF0A);
-

                int16_t AudioSample;
 
                #if defined(USE_TEST_TONE)
                int16_t AudioSample;
 
                #if defined(USE_TEST_TONE)


@@ -197,5 +188,7 @@ void USB_Audio_Task(void)
                        Endpoint_ClearIN();
                }
        }
                        Endpoint_ClearIN();
                }
        }

+
+       Endpoint_SelectEndpoint(PrevEndpoint);

 }
 
 }
 

diff --git a/Demos/Device/LowLevel/AudioInput/AudioInput.h b/Demos/Device/LowLevel/AudioInput/AudioInput.h
index dfad137..7ba2337 100644 (file)
--- a/Demos/Device/LowLevel/AudioInput/AudioInput.h
+++ b/Demos/Device/LowLevel/AudioInput/AudioInput.h
@@ -77,7 +77,6 @@
 
        /* Function Prototypes: */
                void SetupHardware(void);
 
        /* Function Prototypes: */
                void SetupHardware(void);

-               void USB_Audio_Task(void);

 
                void EVENT_USB_Device_Connect(void);
                void EVENT_USB_Device_Disconnect(void);
 
                void EVENT_USB_Device_Connect(void);
                void EVENT_USB_Device_Disconnect(void);

diff --git a/Demos/Device/LowLevel/AudioOutput/AudioOutput.c b/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
index e33eb40..cea44e2 100644 (file)
--- a/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
+++ b/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
@@ -51,7 +51,6 @@ int main(void)
 
        for (;;)
        {
 
        for (;;)
        {

-               USB_Audio_Task();

                USB_USBTask();
        }
 }
                USB_USBTask();
        }
 }


@@ -80,27 +79,28 @@ 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;
-       TCCR0A  = (1 << WGM01);  // CTC mode
-       TCCR0B  = (1 << CS01);   // Fcpu/8 speed
+       TIMSK0 = (1 << OCIE0A);
+       OCR0A  = (F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1;
+       TCCR0A = (1 << WGM01);  // CTC mode
+       TCCR0B = (1 << CS01);   // Fcpu/8 speed

 
 

-#if defined(AUDIO_OUT_MONO)
+       #if defined(AUDIO_OUT_MONO)

        /* Set speaker as output */
        /* Set speaker as output */

-       DDRC   |= (1 << 6);
-#elif defined(AUDIO_OUT_STEREO)
+       DDRC  |= (1 << 6);
+       #elif defined(AUDIO_OUT_STEREO)

        /* Set speakers as outputs */
        /* Set speakers as outputs */

-       DDRC   |= ((1 << 6) | (1 << 5));
-#elif defined(AUDIO_OUT_PORTC)
+       DDRC  |= ((1 << 6) | (1 << 5));
+       #elif defined(AUDIO_OUT_PORTC)

        /* Set PORTC as outputs */
        /* Set PORTC as outputs */

-       DDRC   |= 0xFF;
-#endif
+       DDRC  |= 0xFF;
+       #endif

 
 

-#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
+       #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))

        /* PWM speaker timer initialization */
        /* PWM speaker timer initialization */

-       TCCR3A  = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3A0)
-                               | (1 << COM3B1) | (1 << COM3B0)); // Set on match, clear on TOP
-       TCCR3B  = ((1 << WGM32) | (1 << CS30));  // Fast 8-Bit PWM, F_CPU speed
-#endif
+       TCCR3A = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3A0)
+                              | (1 << COM3B1) | (1 << COM3B0)); // Set on match, clear on TOP
+       TCCR3B = ((1 << WGM32) | (1 << CS30));  // Fast 8-Bit PWM, F_CPU speed
+       #endif

 }
 
 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
 }
 
 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via


@@ -110,20 +110,20 @@ void EVENT_USB_Device_Disconnect(void)
 {
        /* Stop the timers */
        TCCR0B = 0;
 {
        /* Stop the timers */
        TCCR0B = 0;

-#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
+       #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))

        TCCR3B = 0;
        TCCR3B = 0;

-#endif
+       #endif

 
 

-#if defined(AUDIO_OUT_MONO)
+       #if defined(AUDIO_OUT_MONO)

        /* Set speaker as input to reduce current draw */
        /* Set speaker as input to reduce current draw */

-       DDRC   &= ~(1 << 6);
-#elif defined(AUDIO_OUT_STEREO)
+       DDRC  &= ~(1 << 6);
+       #elif defined(AUDIO_OUT_STEREO)

        /* Set speakers as inputs to reduce current draw */
        /* Set speakers as inputs to reduce current draw */

-       DDRC   &= ~((1 << 6) | (1 << 5));
-#elif defined(AUDIO_OUT_PORTC)
+       DDRC  &= ~((1 << 6) | (1 << 5));
+       #elif defined(AUDIO_OUT_PORTC)

        /* Set PORTC low */
        /* Set PORTC low */

-       PORTC  = 0x00;
-#endif
+       PORTC = 0x00;
+       #endif

 
        /* Indicate streaming audio interface not selected */
        StreamingAudioInterfaceSelected = false;
 
        /* Indicate streaming audio interface not selected */
        StreamingAudioInterfaceSelected = false;


@@ -171,34 +171,23 @@ void EVENT_USB_Device_UnhandledControlRequest(void)
        }
 }
 
        }
 }
 

-/** Task to manage the Audio interface, reading in audio samples from the host, and outputting them to the speakers/LEDs as
- *  desired.
- */
-void USB_Audio_Task(void)
+/** ISR to handle the reloading of the PWM timer with the next sample. */
+ISR(TIMER0_COMPA_vect, ISR_BLOCK)

 {
 {

-       /* Device must be connected and configured for the task to run */
-       if (USB_DeviceState != DEVICE_STATE_Configured)
-         return;
-
-       /* Check to see if the streaming interface is selected, if not the host is not receiving audio */
-       if (!(StreamingAudioInterfaceSelected))
-         return;
+       uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();

 
        /* 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 read from (contains a packet) and that the next sample should be read */
-       if (Endpoint_IsOUTReceived() && (TIFR0 & (1 << OCF0A)))
+       /* Check if the current endpoint can be read from (contains a packet) and the host is sending data */
+       if (Endpoint_IsOUTReceived() && StreamingAudioInterfaceSelected)

        {
        {

-               /* Clear the sample reload timer */
-               TIFR0 |= (1 << OCF0A);
-

                /* Retrieve the signed 16-bit left and right audio samples, convert to 8-bit */
                /* Retrieve the signed 16-bit left and right audio samples, convert to 8-bit */

-               int8_t  LeftSample_8Bit   = ((int16_t)Endpoint_Read_Word_LE() >> 8);
-               int8_t  RightSample_8Bit  = ((int16_t)Endpoint_Read_Word_LE() >> 8);
+               int8_t LeftSample_8Bit   = ((int16_t)Endpoint_Read_Word_LE() >> 8);
+               int8_t RightSample_8Bit  = ((int16_t)Endpoint_Read_Word_LE() >> 8);

 
                /* Mix the two channels together to produce a mono, 8-bit sample */
 
                /* Mix the two channels together to produce a mono, 8-bit sample */

-               int8_t  MixedSample_8Bit  = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);
+               int8_t MixedSample_8Bit  = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);

 
                /* Check to see if the bank is now empty */
                if (!(Endpoint_IsReadWriteAllowed()))
 
                /* Check to see if the bank is now empty */
                if (!(Endpoint_IsReadWriteAllowed()))


@@ -207,17 +196,17 @@ void USB_Audio_Task(void)
                        Endpoint_ClearOUT();
                }
 
                        Endpoint_ClearOUT();
                }
 

-#if defined(AUDIO_OUT_MONO)
+               #if defined(AUDIO_OUT_MONO)

                /* Load the sample into the PWM timer channel */
                OCR3A = (MixedSample_8Bit ^ (1 << 7));
                /* Load the sample into the PWM timer channel */
                OCR3A = (MixedSample_8Bit ^ (1 << 7));

-#elif defined(AUDIO_OUT_STEREO)
+               #elif defined(AUDIO_OUT_STEREO)

                /* Load the dual 8-bit samples into the PWM timer channels */
                OCR3A = (LeftSample_8Bit  ^ (1 << 7));
                OCR3B = (RightSample_8Bit ^ (1 << 7));
                /* Load the dual 8-bit samples into the PWM timer channels */
                OCR3A = (LeftSample_8Bit  ^ (1 << 7));
                OCR3B = (RightSample_8Bit ^ (1 << 7));

-#elif defined(AUDIO_OUT_PORTC)
+               #elif defined(AUDIO_OUT_PORTC)

                /* Load the 8-bit mixed sample into PORTC */
                PORTC = MixedSample_8Bit;
                /* Load the 8-bit mixed sample into PORTC */
                PORTC = MixedSample_8Bit;

-#endif
+               #endif

 
                uint8_t LEDMask = LEDS_NO_LEDS;
 
 
                uint8_t LEDMask = LEDS_NO_LEDS;
 


@@ -233,5 +222,7 @@ void USB_Audio_Task(void)
 
                LEDs_SetAllLEDs(LEDMask);
        }
 
                LEDs_SetAllLEDs(LEDMask);
        }

+       
+       Endpoint_SelectEndpoint(PrevEndpoint);

 }
 
 }
 

diff --git a/Demos/Device/LowLevel/AudioOutput/AudioOutput.h b/Demos/Device/LowLevel/AudioOutput/AudioOutput.h
index 7e224f2..46540db 100644 (file)
--- a/Demos/Device/LowLevel/AudioOutput/AudioOutput.h
+++ b/Demos/Device/LowLevel/AudioOutput/AudioOutput.h
@@ -63,7 +63,6 @@
 
        /* Function Prototypes: */
                void SetupHardware(void);
 
        /* Function Prototypes: */
                void SetupHardware(void);

-               void USB_Audio_Task(void);

 
                void EVENT_USB_Device_Connect(void);
                void EVENT_USB_Device_Disconnect(void);
 
                void EVENT_USB_Device_Connect(void);
                void EVENT_USB_Device_Disconnect(void);

diff --git a/LUFA/Drivers/USB/Class/Host/HID.h b/LUFA/Drivers/USB/Class/Host/HID.h
index af8407b..d43a18a 100644 (file)
--- a/LUFA/Drivers/USB/Class/Host/HID.h
+++ b/LUFA/Drivers/USB/Class/Host/HID.h
@@ -97,8 +97,8 @@
                                        bool     DataOUTPipeDoubleBank; /**< Indicates if the HID interface's OUT data pipe should use double banking. */
 
                                        uint8_t  HIDInterfaceProtocol; /**< HID interface protocol value to match against if a specific
                                        bool     DataOUTPipeDoubleBank; /**< Indicates if the HID interface's OUT data pipe should use double banking. */
 
                                        uint8_t  HIDInterfaceProtocol; /**< HID interface protocol value to match against if a specific

-                                                                       *   boot subclass protocol is required, a value from the \ref HID_BootProtocols_t
-                                                                       *   enum.
+                                                                       *   boot subclass protocol is required, a protocol value from the
+                                                                       *   \ref HID_Descriptor_ClassSubclassProtocol_t enum.

                                                                        */
                                        #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
                                        HID_ReportInfo_t* HIDParserData; /**< HID parser data to store the parsed HID report data, when boot protocol
                                                                        */
                                        #if !defined(HID_HOST_BOOT_PROTOCOL_ONLY)
                                        HID_ReportInfo_t* HIDParserData; /**< HID parser data to store the parsed HID report data, when boot protocol

diff --git a/LUFA/ManPages/ChangeLog.txt b/LUFA/ManPages/ChangeLog.txt
index f31902c..dd7fa4b 100644 (file)
--- a/LUFA/ManPages/ChangeLog.txt
+++ b/LUFA/ManPages/ChangeLog.txt
@@ -57,6 +57,7 @@
   *  - Better algorithm to extract and convert the internal device serial number into a string descriptor (if present)
   *  - All USB class drivers are now automatically included when LUFA/Drivers/USB.h is included, and no longer need to be seperately included
   *  - All LowLevel demos changed to use the constants and types defined in the USB class drivers
   *  - Better algorithm to extract and convert the internal device serial number into a string descriptor (if present)
   *  - All USB class drivers are now automatically included when LUFA/Drivers/USB.h is included, and no longer need to be seperately included
   *  - All LowLevel demos changed to use the constants and types defined in the USB class drivers

+  *  - Changed AudioInput and AudioOutput demos to reload the next sample via an interrupt rather than polling the sample timer

   *
   *  <b>Fixed:</b>
   *  - Fixed USB_GetHIDReportItemInfo() function modifying the given report item's data when the report item does not exist
   *
   *  <b>Fixed:</b>
   *  - Fixed USB_GetHIDReportItemInfo() function modifying the given report item's data when the report item does not exist