michi/qmk_firmware
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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.

Browse Source 
Fix Benito documentation indicating erronously that the project used the HID USB class instead of the CDC class.
This commit is contained in:
Dean Camera
2009-07-28 10:46:20 +00:00
parent 864196c884
commit 61ff4824a9
7 changed files with 26 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
+9 -9
View File
@@ -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)