Make both LowLevel and ClassDriver AudioOutput demos always output to board LEDs, regardless of output mode (removed AUDIO_OUT_LEDS compile time option from the demo). This allows for positive feedback to the user of audio activity regardless of output mode.

2 files changed, 14 insertions, 21 deletions

diff --git a/Demos/Device/LowLevel/AudioOutput/AudioOutput.c b/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
index 352d07482..7dde84bb3 100644
--- a/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
+++ b/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
@@ -210,10 +210,11 @@ void USB_Audio_Task(void)
 		int8_t  LeftSample_8Bit   = (LeftSample_16Bit  >> 8);

 		int8_t  RightSample_8Bit  = (RightSample_16Bit >> 8);

 			

-#if !defined(AUDIO_OUT_STEREO)

 		/* 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);

-#endif

+

+		/* Get absolute value of mixed sample value */

+		uint8_t MixedSample_8Bit_Abs = abs(MixedSample_8Bit);

 

 #if defined(AUDIO_OUT_MONO)

 		/* Load the sample into the PWM timer channel */

@@ -225,25 +226,22 @@ void USB_Audio_Task(void)
 #elif defined(AUDIO_OUT_PORTC)

 		/* Load the 8-bit mixed sample into PORTC */

 		PORTC = MixedSample_8Bit;

-#else

-		uint8_t LEDMask = LEDS_NO_LEDS;

+#endif

 

-		/* Make mixed sample value positive (absolute) */

-		MixedSample_8Bit = abs(MixedSample_8Bit);

+		uint8_t LEDMask = LEDS_NO_LEDS;

 

-		if (MixedSample_8Bit > 2)

+		if (MixedSample_8Bit_Abs > 2)

 		  LEDMask |= LEDS_LED1;

 		  

-		if (MixedSample_8Bit > 4)

+		if (MixedSample_8Bit_Abs > 4)

 		  LEDMask |= LEDS_LED2;

 		  

-		if (MixedSample_8Bit > 8)

+		if (MixedSample_8Bit_Abs > 8)

 		  LEDMask |= LEDS_LED3;

 

-		if (MixedSample_8Bit > 16)

+		if (MixedSample_8Bit_Abs > 16)

 		  LEDMask |= LEDS_LED4;

 		  

 		LEDs_SetAllLEDs(LEDMask);

-#endif

 	}

 }

diff --git a/Demos/Device/LowLevel/AudioOutput/AudioOutput.txt b/Demos/Device/LowLevel/AudioOutput/AudioOutput.txt
index ffae9ed57..96d241c57 100644
--- a/Demos/Device/LowLevel/AudioOutput/AudioOutput.txt
+++ b/Demos/Device/LowLevel/AudioOutput/AudioOutput.txt
@@ -53,11 +53,11 @@
  *  required).

  *  

  *  On start-up the system will automatically enumerate and function

- *  as a USB speaker. Incoming audio will output in 8-bit PWM onto

- *  the timer output (timer 3 for the AT90USBXXX6/7 USB AVRs, timer 1 for

- *  the AT90USBXXX2 controller AVRs) compare channel A for AUDIO_OUT_MONO

- *  mode, on channels A and B for AUDIO_OUT_STEREO and on the board LEDs

- *  for AUDIO_OUT_LEDS mode. Decouple audio outputs with a capacitor and

+ *  as a USB speaker. Outgoing audio will output in 8-bit PWM onto

+ *  the timer 3 output compare channel A for AUDIO_OUT_MONO mode, on

+ *  timer 3 channels A and B for AUDIO_OUT_STEREO and on PORTC as a signed

+ *  mono sample for AUDIO_OUT_PORTC. Audio output will also be indicated on

+ *  the board LEDs in all modes. Decouple audio outputs with a capacitor and

  *  attach to a speaker to hear the audio.

  *  

  *  Under Windows, if a driver request dialogue pops up, select the option

@@ -84,11 +84,6 @@
  *    <td>When defined, this outputs the audio samples in mono to the timer output pin of the microcontroller.</td>

  *   </tr>

  *   <tr>

- *    <td>AUDIO_OUT_LEDS</td>

- *    <td>Makefile CDEFS</td>

- *    <td>When defined, this outputs the audio samples in stereo to the board LEDs.</td>

- *   </tr>

- *   <tr>

  *    <td>AUDIO_OUT_PORTC</td>

  *    <td>Makefile CDEFS</td>

  *    <td>When defined, this outputs the audio samples in mono to port C of the microcontroller, for connection to an