Commit for the 090810 release.

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

diff --git a/Demos/Device/LowLevel/AudioOutput/AudioOutput.c b/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
index 9b2bb39..1128e8f 100644 (file)
--- a/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
+++ b/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
@@ -30,7 +30,7 @@
 \r
 /** \file\r
  *\r
- *  Main source file for the Audio Output demo. This file contains the main tasks of the demo and\r
+ *  Main source file for the AudioOutput demo. This file contains the main tasks of the demo and\r
  *  is responsible for the initial application hardware configuration.\r
  */\r
  \r
@@ -73,7 +73,7 @@ void SetupHardware(void)
 /** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs, and\r
  *  configures the sample update and PWM timers.\r
  */\r
-void EVENT_USB_Connect(void)\r
+void EVENT_USB_Device_Connect(void)\r
 {\r
        /* Indicate USB enumerating */\r
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);\r
@@ -105,7 +105,7 @@ void EVENT_USB_Connect(void)
 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via\r
  *  the status LEDs, disables the sample update and PWM output timers and stops the USB and Audio management tasks.\r
  */\r
-void EVENT_USB_Disconnect(void)\r
+void EVENT_USB_Device_Disconnect(void)\r
 {\r
        /* Stop the timers */\r
        TCCR0B = 0;\r
@@ -134,7 +134,7 @@ void EVENT_USB_Disconnect(void)
 /** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration\r
  *  of the USB device after enumeration - the device endpoints are configured.\r
  */\r
-void EVENT_USB_ConfigurationChanged(void)\r
+void EVENT_USB_Device_ConfigurationChanged(void)\r
 {\r
        /* Indicate USB connected and ready */\r
        LEDs_SetAllLEDs(LEDMASK_USB_READY);\r
@@ -148,11 +148,11 @@ void EVENT_USB_ConfigurationChanged(void)
        }\r
 }\r
 \r
-/** Event handler for the USB_UnhandledControlPacket event. This is used to catch standard and class specific\r
+/** Event handler for the USB_UnhandledControlRequest event. This is used to catch standard and class specific\r
  *  control requests that are not handled internally by the USB library (including the Audio class-specific\r
  *  requests) so that they can be handled appropriately for the application.\r
  */\r
-void EVENT_USB_UnhandledControlPacket(void)\r
+void EVENT_USB_Device_UnhandledControlRequest(void)\r
 {\r
        /* Process General and Audio specific control requests */\r
        switch (USB_ControlRequest.bRequest)\r
@@ -210,10 +210,13 @@ void USB_Audio_Task(void)
                int8_t  LeftSample_8Bit   = (LeftSample_16Bit  >> 8);\r
                int8_t  RightSample_8Bit  = (RightSample_16Bit >> 8);\r
                        \r
-#if defined(AUDIO_OUT_MONO)\r
                /* Mix the two channels together to produce a mono, 8-bit sample */\r
                int8_t  MixedSample_8Bit  = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);\r
 \r
+               /* Get absolute value of mixed sample value */\r
+               uint8_t MixedSample_8Bit_Abs = abs(MixedSample_8Bit);\r
+\r
+#if defined(AUDIO_OUT_MONO)\r
                /* Load the sample into the PWM timer channel */\r
                OCR3A = ((uint8_t)MixedSample_8Bit ^ (1 << 7));\r
 #elif defined(AUDIO_OUT_STEREO)\r
@@ -221,38 +224,24 @@ void USB_Audio_Task(void)
                OCR3A = ((uint8_t)LeftSample_8Bit  ^ (1 << 7));\r
                OCR3B = ((uint8_t)RightSample_8Bit ^ (1 << 7));\r
 #elif defined(AUDIO_OUT_PORTC)\r
-               /* Mix the two channels together to produce a mono, 8-bit sample */\r
-               int8_t  MixedSample_8Bit  = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);\r
-\r
+               /* Load the 8-bit mixed sample into PORTC */\r
                PORTC = MixedSample_8Bit;\r
-#else\r
-               uint8_t LEDMask = LEDS_NO_LEDS;\r
-\r
-               /* Make left channel positive (absolute) */\r
-               if (LeftSample_8Bit < 0)\r
-                 LeftSample_8Bit = -LeftSample_8Bit;\r
+#endif\r
 \r
-               /* Make right channel positive (absolute) */\r
-               if (RightSample_8Bit < 0)\r
-                 RightSample_8Bit = -RightSample_8Bit;\r
+               uint8_t LEDMask = LEDS_NO_LEDS;\r
 \r
-               /* Set first LED based on sample value */\r
-               if (LeftSample_8Bit < ((128 / 8) * 1))\r
-                 LEDMask |= LEDS_LED2;\r
-               else if (LeftSample_8Bit < ((128 / 8) * 3))\r
-                 LEDMask |= (LEDS_LED1 | LEDS_LED2);\r
-               else\r
+               if (MixedSample_8Bit_Abs > 2)\r
                  LEDMask |= LEDS_LED1;\r
+                 \r
+               if (MixedSample_8Bit_Abs > 4)\r
+                 LEDMask |= LEDS_LED2;\r
+                 \r
+               if (MixedSample_8Bit_Abs > 8)\r
+                 LEDMask |= LEDS_LED3;\r
 \r
-               /* Set second LED based on sample value */\r
-               if (RightSample_8Bit < ((128 / 8) * 1))\r
+               if (MixedSample_8Bit_Abs > 16)\r
                  LEDMask |= LEDS_LED4;\r
-               else if (RightSample_8Bit < ((128 / 8) * 3))\r
-                 LEDMask |= (LEDS_LED3 | LEDS_LED4);\r
-               else\r
-                 LEDMask |= LEDS_LED3;\r
                  \r
                LEDs_SetAllLEDs(LEDMask);\r
-#endif\r
        }\r
 }\r