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Changed AudioOutput demos to explicitly use timer 3 - the smaller USB AVRs where timer 1 was needed instead did not have the endpoint size neccesary for good audio throughput anyway.

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Fix Benito documentation indicating erronously that the project used the HID USB class instead of the CDC class.
pull/1469/head
Dean Camera 15 years ago
parent 864196c884
commit 61ff4824a9
7 changed files with 26 additions and 119 deletions
Show Stats Download Patch File Download Diff File

18
Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
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@ -108,19 +108,19 @@ void ProcessNextSample(void)
#if defined(AUDIO_OUT_MONO)
/* Load the sample into the PWM timer channel */
OCRxA = ((uint8_t)MixedSample_8Bit ^ (1 << 7));
OCR3A = ((uint8_t)MixedSample_8Bit ^ (1 << 7));
#elif defined(AUDIO_OUT_STEREO)
/* Load the dual 8-bit samples into the PWM timer channels */
OCRxA = ((uint8_t)LeftSample_8Bit ^ (1 << 7));
OCRxB = ((uint8_t)RightSample_8Bit ^ (1 << 7));
OCR3A = ((uint8_t)LeftSample_8Bit ^ (1 << 7));
OCR3B = ((uint8_t)RightSample_8Bit ^ (1 << 7));
#elif defined(AUDIO_OUT_PORTC)
/* Load the 8-bit mixed sample into PORTC */
PORTC = MixedSample_8Bit;
#else
uint8_t LEDMask = LEDS_NO_LEDS;
/* Make mixed sample value positive (absolute) */
if (MixedSample_8Bit < 0)
MixedSample_8Bit = -MixedSample_8Bit;
MixedSample_8Bit = abs(MixedSample_8Bit);
if (MixedSample_8Bit > ((128 / 8) * 1))
LEDMask |= LEDS_LED1;
@ -162,9 +162,9 @@ void EVENT_USB_Connect(void)
#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
/* PWM speaker timer initialization */
TCCRxA = ((1 << WGMx0) | (1 << COMxA1) | (1 << COMxA0)
| (1 << COMxB1) | (1 << COMxB0)); // Set on match, clear on TOP
TCCRxB = ((1 << WGMx2) | (1 << CSx0)); // Fast 8-Bit PWM, Fcpu speed
TCCR3A = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3A0)
| (1 << COM3B1) | (1 << COM3B0)); // Set on match, clear on TOP
TCCR3B = ((1 << WGM32) | (1 << CS30)); // Fast 8-Bit PWM, Fcpu speed
#endif
}
@ -178,7 +178,7 @@ void EVENT_USB_Disconnect(void)
#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
/* Stop the PWM generation timer */
TCCRxB = 0;
TCCR3B = 0;
#endif
#if defined(AUDIO_OUT_MONO)

49
Demos/Device/ClassDriver/AudioOutput/AudioOutput.h
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@ -50,54 +50,7 @@
#include <LUFA/Drivers/USB/USB.h>
#include <LUFA/Drivers/USB/Class/Audio.h>
/* Macros: */
#if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
#define TCCRxA TCCR3A
#define TCCRxB TCCR3B
#define OCRxA OCR3A
#define OCRxB OCR3B
#define WGMx0 WGM30
#define WGMx2 WGM32
#define COMxA1 COM3A1
#define COMxA0 COM3A0
#define COMxB1 COM3B1
#define COMxB0 COM3B0
#define CSx0 CS30
#else
/** Timer count register used for left channel PWM audio output (or mixed output in mono output mode) */
#define TCCRxA TCCR1A
/** Timer count register used for right channel PWM audio output */
#define TCCRxB TCCR1B
/** Timer compare register used for left channel PWM audio output (or mixed output in mono output mode) */
#define OCRxA OCR1A
/** Timer compare register used for right channel PWM audio output */
#define OCRxB OCR1B
/** Timer control register mask used to select PWM mode */
#define WGMx0 WGM10
/** Timer control register mask used to select PWM mode */
#define WGMx2 WGM12
/** Timer control register mask used to set, clear or toggle channel output pin on match */
#define COMxA1 COM1A1
/** Timer control register mask used to set, clear or toggle channel output pin on match */
#define COMxA0 COM1A0
/** Timer control register mask used to set, clear or toggle channel output pin on match */
#define COMxB1 COM1B1
/** Timer control register mask used to set, clear or toggle channel output pin on match */
#define COMxB0 COM1B0
/** Timer control register mask used to start the timer at Fcpu clock rate */
#define CSx0 CS10
#endif
/* Macros: */
/** LED mask for the library LED driver, to indicate that the USB interface is not ready. */
#define LEDMASK_USB_NOTREADY LEDS_LED1

6
Demos/Device/LowLevel/AudioInput/AudioInput.h
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@ -50,13 +50,13 @@
/* Macros: */
/** ADC channel number for the microphone input. */
#define MIC_IN_ADC_CHANNEL 2
#define MIC_IN_ADC_CHANNEL 2
/** Maximum ADC sample value for the microphone input. */
#define SAMPLE_MAX_RANGE 0xFFFF
#define SAMPLE_MAX_RANGE 0xFFFF
/** Maximum ADC range for the microphone input. */
#define ADC_MAX_RANGE 0x3FF
#define ADC_MAX_RANGE 0x3FF
/** LED mask for the library LED driver, to indicate that the USB interface is not ready. */
#define LEDMASK_USB_NOTREADY LEDS_LED1

14
Demos/Device/LowLevel/AudioOutput/AudioOutput.c
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@ -96,9 +96,9 @@ void EVENT_USB_Connect(void)
#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
/* PWM speaker timer initialization */
TCCRxA = ((1 << WGMx0) | (1 << COMxA1) | (1 << COMxA0)
| (1 << COMxB1) | (1 << COMxB0)); // Set on match, clear on TOP
TCCRxB = ((1 << WGMx2) | (1 << CSx0)); // Fast 8-Bit PWM, Fcpu speed
TCCR3A = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3A0)
| (1 << COM3B1) | (1 << COM3B0)); // Set on match, clear on TOP
TCCR3B = ((1 << WGM32) | (1 << CS30)); // Fast 8-Bit PWM, Fcpu speed
#endif
}
@ -110,7 +110,7 @@ void EVENT_USB_Disconnect(void)
/* Stop the timers */
TCCR0B = 0;
#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
TCCRxB = 0;
TCCR3B = 0;
#endif
#if defined(AUDIO_OUT_MONO)
@ -215,11 +215,11 @@ void USB_Audio_Task(void)
int8_t MixedSample_8Bit = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);
/* Load the sample into the PWM timer channel */
OCRxA = ((uint8_t)MixedSample_8Bit ^ (1 << 7));
OCR3A = ((uint8_t)MixedSample_8Bit ^ (1 << 7));
#elif defined(AUDIO_OUT_STEREO)
/* Load the dual 8-bit samples into the PWM timer channels */
OCRxA = ((uint8_t)LeftSample_8Bit ^ (1 << 7));
OCRxB = ((uint8_t)RightSample_8Bit ^ (1 << 7));
OCR3A = ((uint8_t)LeftSample_8Bit ^ (1 << 7));
OCR3B = ((uint8_t)RightSample_8Bit ^ (1 << 7));
#elif defined(AUDIO_OUT_PORTC)
/* Mix the two channels together to produce a mono, 8-bit sample */
int8_t MixedSample_8Bit = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);

47
Demos/Device/LowLevel/AudioOutput/AudioOutput.h
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@ -48,53 +48,6 @@
#include <LUFA/Drivers/Board/LEDs.h>
/* Macros: */
#if (defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))
#define TCCRxA TCCR3A
#define TCCRxB TCCR3B
#define OCRxA OCR3A
#define OCRxB OCR3B
#define WGMx0 WGM30
#define WGMx2 WGM32
#define COMxA1 COM3A1
#define COMxA0 COM3A0
#define COMxB1 COM3B1
#define COMxB0 COM3B0
#define CSx0 CS30
#else
/** Timer count register used for left channel PWM audio output (or mixed output in mono output mode) */
#define TCCRxA TCCR1A
/** Timer count register used for right channel PWM audio output */
#define TCCRxB TCCR1B
/** Timer compare register used for left channel PWM audio output (or mixed output in mono output mode) */
#define OCRxA OCR1A
/** Timer compare register used for right channel PWM audio output */
#define OCRxB OCR1B
/** Timer control register mask used to select PWM mode */
#define WGMx0 WGM10
/** Timer control register mask used to select PWM mode */
#define WGMx2 WGM12
/** Timer control register mask used to set, clear or toggle channel output pin on match */
#define COMxA1 COM1A1
/** Timer control register mask used to set, clear or toggle channel output pin on match */
#define COMxA0 COM1A0
/** Timer control register mask used to set, clear or toggle channel output pin on match */
#define COMxB1 COM1B1
/** Timer control register mask used to set, clear or toggle channel output pin on match */
#define COMxB0 COM1B0
/** Timer control register mask used to start the timer at Fcpu clock rate */
#define CSx0 CS10
#endif
/** LED mask for the library LED driver, to indicate that the USB interface is not ready. */
#define LEDMASK_USB_NOTREADY LEDS_LED1

2
Projects/Benito/Benito.c
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@ -79,7 +79,7 @@ int main(void)
for (;;)
{
/* Echo bytes from the host to the target via the hardware USART */
if (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
if (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface) > 0)
{
Serial_TxByte(CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));

9
Projects/Benito/Benito.txt
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@ -31,19 +31,20 @@
* </tr>
* <tr>
* <td><b>USB Class:</b></td>
* <td>Human Interface Device (HID)</td>
* <td>Communications Device Class (CDC)</td>
* </tr>
* <tr>
* <td><b>USB Subclass:</b></td>
* <td>Keyboard</td>
* <td>Abstract Control Model (ACM)</td>
* </tr>
* <tr>
* <td><b>Relevant Standards:</b></td>
* <td>USBIF HID Standard, USBIF HID Usage Tables</td>
* <td>USBIF CDC Class Standard</td>
* <td>Arduino Bootloader Specification</td>
* </tr>
* <tr>
* <td><b>Usable Speeds:</b></td>
* <td>Low Speed Mode, Full Speed Mode</td>
* <td>Full Speed Mode</td>
* </tr>
* </table>
*

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