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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
9661f03
..
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
\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
* 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
/** 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
{
\r
/* Indicate USB enumerating */
\r
LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
\r
@@
-96,21
+96,21
@@
void EVENT_USB_Connect(void)
\r
#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
\r
/* PWM speaker timer initialization */
\r
\r
#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
\r
/* PWM speaker timer initialization */
\r
- TCCR
xA = ((1 << WGMx0) | (1 << COMxA1) | (1 << COMx
A0)
\r
- | (1 << COM
xB1) | (1 << COMx
B0)); // Set on match, clear on TOP
\r
- TCCR
xB = ((1 << WGMx2) | (1 << CSx
0)); // Fast 8-Bit PWM, Fcpu speed
\r
+ TCCR
3A = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3
A0)
\r
+ | (1 << COM
3B1) | (1 << COM3
B0)); // Set on match, clear on TOP
\r
+ TCCR
3B = ((1 << WGM32) | (1 << CS3
0)); // Fast 8-Bit PWM, Fcpu speed
\r
#endif
\r
}
\r
\r
/** 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
#endif
\r
}
\r
\r
/** 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_D
evice_D
isconnect(void)
\r
{
\r
/* Stop the timers */
\r
TCCR0B = 0;
\r
#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
\r
{
\r
/* Stop the timers */
\r
TCCR0B = 0;
\r
#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
\r
- TCCR
x
B = 0;
\r
+ TCCR
3
B = 0;
\r
#endif
\r
\r
#if defined(AUDIO_OUT_MONO)
\r
#endif
\r
\r
#if defined(AUDIO_OUT_MONO)
\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
/** 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
{
\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
}
\r
}
\r
\r
-/** Event handler for the USB_UnhandledControl
Packe
t event. This is used to catch standard and class specific
\r
+/** Event handler for the USB_UnhandledControl
Reques
t 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
* 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_
UnhandledControlPacke
t(void)
\r
+void EVENT_USB_
Device_UnhandledControlReques
t(void)
\r
{
\r
/* Process General and Audio specific control requests */
\r
switch (USB_ControlRequest.bRequest)
\r
{
\r
/* Process General and Audio specific control requests */
\r
switch (USB_ControlRequest.bRequest)
\r
@@
-166,9
+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
/* 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
}
\r
\r
break;
\r
@@
-180,6
+178,10
@@
void EVENT_USB_UnhandledControlPacket(void)
*/
\r
void USB_Audio_Task(void)
\r
{
\r
*/
\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
/* Check to see if the streaming interface is selected, if not the host is not receiving audio */
\r
if (!(StreamingAudioInterfaceSelected))
\r
return;
\r
@@
-208,49
+210,38
@@
void USB_Audio_Task(void)
int8_t LeftSample_8Bit = (LeftSample_16Bit >> 8);
\r
int8_t RightSample_8Bit = (RightSample_16Bit >> 8);
\r
\r
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
/* 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
/* Load the sample into the PWM timer channel */
\r
- OCR
x
A = ((uint8_t)MixedSample_8Bit ^ (1 << 7));
\r
+ OCR
3
A = ((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
#elif defined(AUDIO_OUT_STEREO)
\r
/* Load the dual 8-bit samples into the PWM timer channels */
\r
- OCR
x
A = ((uint8_t)LeftSample_8Bit ^ (1 << 7));
\r
- OCR
x
B = ((uint8_t)RightSample_8Bit ^ (1 << 7));
\r
+ OCR
3
A = ((uint8_t)LeftSample_8Bit ^ (1 << 7));
\r
+ OCR
3
B = ((uint8_t)RightSample_8Bit ^ (1 << 7));
\r
#elif defined(AUDIO_OUT_PORTC)
\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
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
\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
\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
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
\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
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
\r
LEDs_SetAllLEDs(LEDMask);
\r
-#endif
\r
}
\r
}
\r
}
\r
}
\r