projects / pub / USBasp.git / blobdiff
? search:
summary | shortlog | log | commit | commitdiff | tree
raw | inline | side by side
Minor documentation improvements.
[pub/USBasp.git] / Demos / Host / ClassDriver / AudioOutputHost / AudioOutputHost.c
diff --git a/Demos/Host/ClassDriver/AudioOutputHost/AudioOutputHost.c b/Demos/Host/ClassDriver/AudioOutputHost/AudioOutputHost.c
index b4a7a3b..783b0a5 100644 (file)
--- a/Demos/Host/ClassDriver/AudioOutputHost/AudioOutputHost.c
+++ b/Demos/Host/ClassDriver/AudioOutputHost/AudioOutputHost.c
@@ -1,13 +1,13 @@
 /*
              LUFA Library
 /*
              LUFA Library
-     Copyright (C) Dean Camera, 2011.
+     Copyright (C) Dean Camera, 2012.
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 */
 
 /*
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 */
 
 /*
-  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)
 
   Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted
 
   Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted
@@ -63,74 +63,6 @@ int main(void)
 
        for (;;)
        {
 
        for (;;)
        {
-               switch (USB_HostState)
-               {
-                       case HOST_STATE_Addressed:
-                               LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
-
-                               uint16_t ConfigDescriptorSize;
-                               uint8_t  ConfigDescriptorData[512];
-
-                               if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
-                                                                      sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
-                               {
-                                       puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
-                                       LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
-                                       USB_HostState = HOST_STATE_WaitForDeviceRemoval;
-                                       break;
-                               }
-
-                               if (Audio_Host_ConfigurePipes(&Speaker_Audio_Interface,
-                                                             ConfigDescriptorSize, ConfigDescriptorData) != AUDIO_ENUMERROR_NoError)
-                               {
-                                       puts_P(PSTR("Attached Device Not a Valid Audio Output Device.\r\n"));
-                                       LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
-                                       USB_HostState = HOST_STATE_WaitForDeviceRemoval;
-                                       break;
-                               }
-
-                               if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
-                               {
-                                       puts_P(PSTR("Error Setting Device Configuration.\r\n"));
-                                       LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
-                                       USB_HostState = HOST_STATE_WaitForDeviceRemoval;
-                                       break;
-                               }
-
-                               if (Audio_Host_StartStopStreaming(&Speaker_Audio_Interface, true) != HOST_SENDCONTROL_Successful)
-                               {
-                                       puts_P(PSTR("Error Enabling Audio Stream.\r\n"));
-                                       LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
-                                       USB_HostState = HOST_STATE_WaitForDeviceRemoval;
-                                       break;
-                               }
-                               
-                               USB_Audio_SampleFreq_t SampleRate = AUDIO_SAMPLE_FREQ(48000);
-                               if (Audio_Host_GetSetEndpointProperty(&Speaker_Audio_Interface, Speaker_Audio_Interface.Config.DataOUTPipeNumber,
-                                                                     AUDIO_REQ_SetCurrent, AUDIO_EPCONTROL_SamplingFreq,
-                                                                     sizeof(SampleRate), &SampleRate) != HOST_SENDCONTROL_Successful)
-                               {
-                                       puts_P(PSTR("Error Setting Audio Sampling Frequency.\r\n"));
-                                       LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
-                                       USB_HostState = HOST_STATE_WaitForDeviceRemoval;
-                                       break;                          
-                               }
-
-                               /* Sample reload timer initialization */
-                               TIMSK0  = (1 << OCIE0A);
-                               OCR0A   = ((F_CPU / 8 / 48000) - 1);
-                               TCCR0A  = (1 << WGM01);  // CTC mode
-                               TCCR0B  = (1 << CS01);   // Fcpu/8 speed
-
-                               puts_P(PSTR("Audio Device Enumerated.\r\n"));
-                               LEDs_SetAllLEDs(LEDMASK_USB_READY);
-                               USB_HostState = HOST_STATE_Configured;
-                               break;
-                       case HOST_STATE_Configured:
-                               /* Do nothing - audio stream is handled by the timer interrupt routine */
-                               break;
-               }
-
                Audio_Host_USBTask(&Speaker_Audio_Interface);
                USB_USBTask();
        }
                Audio_Host_USBTask(&Speaker_Audio_Interface);
                USB_USBTask();
        }
@@ -149,11 +81,11 @@ ISR(TIMER0_COMPA_vect, ISR_BLOCK)
                #if defined(USE_TEST_TONE)
                        static uint8_t SquareWaveSampleCount;
                        static int16_t CurrentWaveValue;
                #if defined(USE_TEST_TONE)
                        static uint8_t SquareWaveSampleCount;
                        static int16_t CurrentWaveValue;
-                       
+
                        /* In test tone mode, generate a square wave at 1/256 of the sample rate */
                        if (SquareWaveSampleCount++ == 0xFF)
                          CurrentWaveValue ^= 0x8000;
                        /* In test tone mode, generate a square wave at 1/256 of the sample rate */
                        if (SquareWaveSampleCount++ == 0xFF)
                          CurrentWaveValue ^= 0x8000;
-                       
+
                        /* Only generate audio if the board button is being pressed */
                        AudioSample = (Buttons_GetStatus() & BUTTONS_BUTTON1) ? CurrentWaveValue : 0;
                #else
                        /* Only generate audio if the board button is being pressed */
                        AudioSample = (Buttons_GetStatus() & BUTTONS_BUTTON1) ? CurrentWaveValue : 0;
                #else
@@ -165,11 +97,11 @@ ISR(TIMER0_COMPA_vect, ISR_BLOCK)
                        AudioSample -= (SAMPLE_MAX_RANGE / 2);
                        #endif
                #endif
                        AudioSample -= (SAMPLE_MAX_RANGE / 2);
                        #endif
                #endif
-               
-               Audio_Host_WriteSample16(&Speaker_Audio_Interface, AudioSample);        
+
+               Audio_Host_WriteSample16(&Speaker_Audio_Interface, AudioSample);
                Audio_Host_WriteSample16(&Speaker_Audio_Interface, AudioSample);
        }
                Audio_Host_WriteSample16(&Speaker_Audio_Interface, AudioSample);
        }
-       
+
        Pipe_SelectPipe(PrevPipe);
 }
 
        Pipe_SelectPipe(PrevPipe);
 }
 
@@ -218,6 +150,60 @@ void EVENT_USB_Host_DeviceUnattached(void)
  */
 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 {
  */
 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 {
+       LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+
+       uint16_t ConfigDescriptorSize;
+       uint8_t  ConfigDescriptorData[512];
+
+       if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
+                                              sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
+       {
+               puts_P(PSTR("Error Retrieving Configuration Descriptor.\r\n"));
+               LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+               return;
+       }
+
+       if (Audio_Host_ConfigurePipes(&Speaker_Audio_Interface,
+                                     ConfigDescriptorSize, ConfigDescriptorData) != AUDIO_ENUMERROR_NoError)
+       {
+               puts_P(PSTR("Attached Device Not a Valid Audio Output Device.\r\n"));
+               LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+               return;
+       }
+
+       if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
+       {
+               puts_P(PSTR("Error Setting Device Configuration.\r\n"));
+               LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+               return;
+       }
+
+       if (Audio_Host_StartStopStreaming(&Speaker_Audio_Interface, true) != HOST_SENDCONTROL_Successful)
+       {
+               puts_P(PSTR("Error Enabling Audio Stream.\r\n"));
+               LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+               USB_Host_SetDeviceConfiguration(0);
+               return;
+       }
+
+       USB_Audio_SampleFreq_t SampleRate = AUDIO_SAMPLE_FREQ(48000);
+       if (Audio_Host_GetSetEndpointProperty(&Speaker_Audio_Interface, Speaker_Audio_Interface.Config.DataOUTPipeNumber,
+                                             AUDIO_REQ_SetCurrent, AUDIO_EPCONTROL_SamplingFreq,
+                                             sizeof(SampleRate), &SampleRate) != HOST_SENDCONTROL_Successful)
+       {
+               puts_P(PSTR("Error Setting Audio Sampling Frequency.\r\n"));
+               LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+               USB_Host_SetDeviceConfiguration(0);
+               return;
+       }
+
+       /* Sample reload timer initialization */
+       TIMSK0  = (1 << OCIE0A);
+       OCR0A   = ((F_CPU / 8 / 48000) - 1);
+       TCCR0A  = (1 << WGM01);  // CTC mode
+       TCCR0B  = (1 << CS01);   // Fcpu/8 speed
+
+       puts_P(PSTR("Audio Device Enumerated.\r\n"));
        LEDs_SetAllLEDs(LEDMASK_USB_READY);
 }
 
        LEDs_SetAllLEDs(LEDMASK_USB_READY);
 }
 
USB isp AVR programmer