Changed AudioOutput demos to explicitly use timer 3 - the smaller USB AVRs where...

[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 7a9c6ec..9b2bb39 100644 (file)
--- a/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
+++ b/Demos/Device/LowLevel/AudioOutput/AudioOutput.c
@@ -96,9 +96,9 @@ 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
@@ -110,7 +110,7 @@ void EVENT_USB_Disconnect(void)
        /* Stop the timers */\r
        TCCR0B = 0;\r
 #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))\r
-       TCCRxB = 0;\r
+       TCCR3B = 0;\r
 #endif         \r
 \r
 #if defined(AUDIO_OUT_MONO)\r
@@ -136,13 +136,16 @@ void EVENT_USB_Disconnect(void)
  */\r
 void EVENT_USB_ConfigurationChanged(void)\r
 {\r
-       /* Setup audio stream endpoint */\r
-       Endpoint_ConfigureEndpoint(AUDIO_STREAM_EPNUM, EP_TYPE_ISOCHRONOUS,\r
-                                      ENDPOINT_DIR_OUT, AUDIO_STREAM_EPSIZE,\r
-                                  ENDPOINT_BANK_DOUBLE);\r
-\r
        /* Indicate USB connected and ready */\r
        LEDs_SetAllLEDs(LEDMASK_USB_READY);\r
+\r
+       /* Setup audio stream endpoint */\r
+       if (!(Endpoint_ConfigureEndpoint(AUDIO_STREAM_EPNUM, EP_TYPE_ISOCHRONOUS,\r
+                                            ENDPOINT_DIR_OUT, AUDIO_STREAM_EPSIZE,\r
+                                        ENDPOINT_BANK_DOUBLE)))\r
+       {\r
+               LEDs_SetAllLEDs(LEDMASK_USB_ERROR);\r
+       }\r
 }\r
 \r
 /** Event handler for the USB_UnhandledControlPacket event. This is used to catch standard and class specific\r
@@ -163,9 +166,7 @@ void EVENT_USB_UnhandledControlPacket(void)
                                /* Check if the host is enabling the audio interface (setting AlternateSetting to 1) */\r
                                StreamingAudioInterfaceSelected = ((USB_ControlRequest.wValue) != 0);\r
                                \r
-                               /* Acknowledge status stage */\r
-                               while (!(Endpoint_IsINReady()));\r
-                               Endpoint_ClearIN();\r
+                               Endpoint_ClearStatusStage();\r
                        }\r
 \r
                        break;\r
@@ -177,6 +178,10 @@ void EVENT_USB_UnhandledControlPacket(void)
  */\r
 void USB_Audio_Task(void)\r
 {\r
+       /* Device must be connected and configured for the task to run */\r
+       if (USB_DeviceState != DEVICE_STATE_Configured)\r
+         return;\r
+\r
        /* Check to see if the streaming interface is selected, if not the host is not receiving audio */\r
        if (!(StreamingAudioInterfaceSelected))\r
          return;       \r
@@ -210,11 +215,11 @@ void USB_Audio_Task(void)
                int8_t  MixedSample_8Bit  = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);\r
 \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
                /* 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