Commit for the 090810 release.

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

diff --git a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
index f859c7c..d7de7d5 100644 (file)
--- a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
+++ b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
@@ -46,14 +46,9 @@ USB_ClassInfo_Audio_Device_t Speaker_Audio_Interface =
                        {\r
                                .StreamingInterfaceNumber = 1,\r
 \r
-                               .DataINEndpointNumber     = AUDIO_STREAM_EPNUM,\r
-                               .DataINEndpointSize       = AUDIO_STREAM_EPSIZE,\r
+                               .DataOUTEndpointNumber    = AUDIO_STREAM_EPNUM,\r
+                               .DataOUTEndpointSize      = AUDIO_STREAM_EPSIZE,\r
                        },\r
-               \r
-               .State =\r
-                       {\r
-                               // Leave all state values to their defaults\r
-                       }\r
        };\r
 \r
 /** Main program entry point. This routine contains the overall program flow, including initial\r
@@ -67,8 +62,7 @@ int main(void)
        \r
        for (;;)\r
        {\r
-               if (Speaker_Audio_Interface.State.InterfaceEnabled)\r
-                 ProcessNextSample();\r
+               ProcessNextSample();\r
 \r
                Audio_Device_USBTask(&Speaker_Audio_Interface);\r
                USB_USBTask();\r
@@ -95,14 +89,15 @@ void SetupHardware(void)
  */\r
 void ProcessNextSample(void)\r
 {\r
+       /* Check if the sample reload timer period has elapsed, and that the USB bus is ready for a new sample */\r
        if ((TIFR0 & (1 << OCF0A)) && Audio_Device_IsSampleReceived(&Speaker_Audio_Interface))\r
        {\r
                /* Clear the sample reload timer */\r
                TIFR0 |= (1 << OCF0A);\r
 \r
                /* Retrieve the signed 16-bit left and right audio samples */\r
-               int16_t LeftSample_16Bit  = (int16_t)Audio_Device_ReadSample16();\r
-               int16_t RightSample_16Bit = (int16_t)Audio_Device_ReadSample16();\r
+               int16_t LeftSample_16Bit  = Audio_Device_ReadSample16(&Speaker_Audio_Interface);\r
+               int16_t RightSample_16Bit = Audio_Device_ReadSample16(&Speaker_Audio_Interface);\r
 \r
                /* Massage signed 16-bit left and right audio samples into signed 8-bit */\r
                int8_t  LeftSample_8Bit   = (LeftSample_16Bit  >> 8);\r
@@ -111,41 +106,41 @@ void ProcessNextSample(void)
                /* 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
-               OCRxA = ((uint8_t)MixedSample_8Bit ^ (1 << 7));\r
+               OCR3A = ((uint8_t)MixedSample_8Bit ^ (1 << 7));\r
 #elif defined(AUDIO_OUT_STEREO)\r
                /* Load the dual 8-bit samples into the PWM timer channels */\r
-               OCRxA = ((uint8_t)LeftSample_8Bit  ^ (1 << 7));\r
-               OCRxB = ((uint8_t)RightSample_8Bit ^ (1 << 7));\r
+               OCR3A = ((uint8_t)LeftSample_8Bit  ^ (1 << 7));\r
+               OCR3B = ((uint8_t)RightSample_8Bit ^ (1 << 7));\r
 #elif defined(AUDIO_OUT_PORTC)\r
+               /* Load the 8-bit mixed sample into PORTC */\r
                PORTC = MixedSample_8Bit;\r
-#else\r
-               uint8_t LEDMask = LEDS_NO_LEDS;\r
+#endif\r
 \r
-               /* Make mixed sample value positive (absolute) */\r
-               if (MixedSample_8Bit < 0)\r
-                 MixedSample_8Bit = -MixedSample_8Bit;\r
+               uint8_t LEDMask = LEDS_NO_LEDS;\r
 \r
-               if (MixedSample_8Bit > ((128 / 8) * 1))\r
+               if (MixedSample_8Bit_Abs > 2)\r
                  LEDMask |= LEDS_LED1;\r
                  \r
-               if (MixedSample_8Bit > ((128 / 8) * 2))\r
+               if (MixedSample_8Bit_Abs > 4)\r
                  LEDMask |= LEDS_LED2;\r
                  \r
-               if (MixedSample_8Bit > ((128 / 8) * 3))\r
+               if (MixedSample_8Bit_Abs > 8)\r
                  LEDMask |= LEDS_LED3;\r
 \r
-               if (MixedSample_8Bit > ((128 / 8) * 4))\r
+               if (MixedSample_8Bit_Abs > 16)\r
                  LEDMask |= LEDS_LED4;\r
 \r
                LEDs_SetAllLEDs(LEDMask);\r
-#endif\r
        }\r
 }\r
 \r
 /** Event handler for the library USB Connection event. */\r
-void EVENT_USB_Connect(void)\r
+void EVENT_USB_Device_Connect(void)\r
 {\r
        LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);\r
        \r
@@ -167,14 +162,14 @@ void EVENT_USB_Connect(void)
 \r
 #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))\r
        /* PWM speaker timer initialization */\r
-       TCCRxA  = ((1 << WGMx0) | (1 << COMxA1) | (1 << COMxA0)\r
-               | (1 << COMxB1) | (1 << COMxB0)); // Set on match, clear on TOP\r
-       TCCRxB  = ((1 << WGMx2) | (1 << CSx0));  // Fast 8-Bit PWM, Fcpu speed\r
+       TCCR3A  = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3A0)\r
+               | (1 << COM3B1) | (1 << COM3B0)); // Set on match, clear on TOP\r
+       TCCR3B  = ((1 << WGM32) | (1 << CS30));  // Fast 8-Bit PWM, Fcpu speed\r
 #endif\r
 }\r
 \r
 /** Event handler for the library USB Disconnection event. */\r
-void EVENT_USB_Disconnect(void)\r
+void EVENT_USB_Device_Disconnect(void)\r
 {\r
        LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);\r
 \r
@@ -183,7 +178,7 @@ void EVENT_USB_Disconnect(void)
 \r
 #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))\r
        /* Stop the PWM generation timer */\r
-       TCCRxB = 0;\r
+       TCCR3B = 0;\r
 #endif\r
 \r
 #if defined(AUDIO_OUT_MONO)\r
@@ -199,7 +194,7 @@ void EVENT_USB_Disconnect(void)
 }\r
 \r
 /** Event handler for the library USB Configuration Changed event. */\r
-void EVENT_USB_ConfigurationChanged(void)\r
+void EVENT_USB_Device_ConfigurationChanged(void)\r
 {\r
        LEDs_SetAllLEDs(LEDMASK_USB_READY);\r
        \r
@@ -207,8 +202,8 @@ void EVENT_USB_ConfigurationChanged(void)
          LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
 }\r
 \r
-/** Event handler for the library USB Unhandled Control Packet event. */\r
-void EVENT_USB_UnhandledControlPacket(void)\r
+/** Event handler for the library USB Unhandled Control Request event. */\r
+void EVENT_USB_Device_UnhandledControlRequest(void)\r
 {\r
-       Audio_Device_ProcessControlPacket(&Speaker_Audio_Interface);\r
+       Audio_Device_ProcessControlRequest(&Speaker_Audio_Interface);\r
 }\r