X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/dc68de15b69c2064b1b14d00659aa91054cccbe1..a8b66f318dda3cc18dfcedaa3af3d01ab68b82e8:/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c?ds=sidebyside diff --git a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c index 3648b6ea7..4650cd8c5 100644 --- a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c +++ b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c @@ -1,200 +1,200 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2009. - - dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com -*/ - -/* - Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, and distribute this software - and its documentation for any purpose and without fee is hereby - granted, provided that the above copyright notice appear in all - copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the - software without specific, written prior permission. - - The author disclaim all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -/** \file - * - * Main source file for the AudioOutput demo. This file contains the main tasks of - * the demo and is responsible for the initial application hardware configuration. - */ - -#include "AudioOutput.h" - -/** LUFA Audio Class driver interface configuration and state information. This structure is - * passed to all Audio Class driver functions, so that multiple instances of the same class - * within a device can be differentiated from one another. - */ -USB_ClassInfo_Audio_Device_t Speaker_Audio_Interface = - { - .Config = - { - .StreamingInterfaceNumber = 1, - - .DataOUTEndpointNumber = AUDIO_STREAM_EPNUM, - .DataOUTEndpointSize = AUDIO_STREAM_EPSIZE, - }, - }; - -/** Main program entry point. This routine contains the overall program flow, including initial - * setup of all components and the main program loop. - */ -int main(void) -{ - SetupHardware(); - - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); - - for (;;) - { - ProcessNextSample(); - - Audio_Device_USBTask(&Speaker_Audio_Interface); - USB_USBTask(); - } -} - -/** Configures the board hardware and chip peripherals for the demo's functionality. */ -void SetupHardware(void) -{ - /* Disable watchdog if enabled by bootloader/fuses */ - MCUSR &= ~(1 << WDRF); - wdt_disable(); - - /* Disable clock division */ - clock_prescale_set(clock_div_1); - - /* Hardware Initialization */ - LEDs_Init(); - USB_Init(); -} - -/** Processes the next audio sample by reading the last ADC conversion and writing it to the audio - * interface, each time the sample reload timer period elapses to give a constant sample rate. - */ -void ProcessNextSample(void) -{ - /* Check if the sample reload timer period has elapsed, and that the USB bus is ready for a new sample */ - if ((TIFR0 & (1 << OCF0A)) && Audio_Device_IsSampleReceived(&Speaker_Audio_Interface)) - { - /* Clear the sample reload timer */ - TIFR0 |= (1 << OCF0A); - - /* Retrieve the signed 16-bit left and right audio samples, convert to 8-bit */ - int8_t LeftSample_8Bit = (Audio_Device_ReadSample16(&Speaker_Audio_Interface) >> 8); - int8_t RightSample_8Bit = (Audio_Device_ReadSample16(&Speaker_Audio_Interface) >> 8); - - /* 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); - -#if defined(AUDIO_OUT_MONO) - /* Load the sample into the PWM timer channel */ - OCR3A = (MixedSample_8Bit ^ (1 << 7)); -#elif defined(AUDIO_OUT_STEREO) - /* Load the dual 8-bit samples into the PWM timer channels */ - OCR3A = (LeftSample_8Bit ^ (1 << 7)); - OCR3B = (RightSample_8Bit ^ (1 << 7)); -#elif defined(AUDIO_OUT_PORTC) - /* Load the 8-bit mixed sample into PORTC */ - PORTC = MixedSample_8Bit; -#endif - - uint8_t LEDMask = LEDS_NO_LEDS; - - /* Turn on LEDs as the sample amplitude increases */ - if (MixedSample_8Bit > 16) - LEDMask = (LEDS_LED1 | LEDS_LED2 | LEDS_LED3 | LEDS_LED4); - else if (MixedSample_8Bit > 8) - LEDMask = (LEDS_LED1 | LEDS_LED2 | LEDS_LED3); - else if (MixedSample_8Bit > 4) - LEDMask = (LEDS_LED1 | LEDS_LED2); - else if (MixedSample_8Bit > 2) - LEDMask = (LEDS_LED1); - - LEDs_SetAllLEDs(LEDMask); - } -} - -/** Event handler for the library USB Connection event. */ -void EVENT_USB_Device_Connect(void) -{ - LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); - - /* Sample reload timer initialization */ - OCR0A = (F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1; - TCCR0A = (1 << WGM01); // CTC mode - TCCR0B = (1 << CS01); // Fcpu/8 speed - -#if defined(AUDIO_OUT_MONO) - /* Set speaker as output */ - DDRC |= (1 << 6); -#elif defined(AUDIO_OUT_STEREO) - /* Set speakers as outputs */ - DDRC |= ((1 << 6) | (1 << 5)); -#elif defined(AUDIO_OUT_PORTC) - /* Set PORTC as outputs */ - DDRC |= 0xFF; -#endif - -#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO)) - /* PWM speaker timer initialization */ - 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 -} - -/** Event handler for the library USB Disconnection event. */ -void EVENT_USB_Device_Disconnect(void) -{ - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); - - /* Stop the sample reload timer */ - TCCR0B = 0; - -#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO)) - /* Stop the PWM generation timer */ - TCCR3B = 0; -#endif - -#if defined(AUDIO_OUT_MONO) - /* Set speaker as input to reduce current draw */ - DDRC &= ~(1 << 6); -#elif defined(AUDIO_OUT_STEREO) - /* Set speakers as inputs to reduce current draw */ - DDRC &= ~((1 << 6) | (1 << 5)); -#elif defined(AUDIO_OUT_PORTC) - /* Set PORTC low */ - PORTC = 0x00; -#endif -} - -/** Event handler for the library USB Configuration Changed event. */ -void EVENT_USB_Device_ConfigurationChanged(void) -{ - LEDs_SetAllLEDs(LEDMASK_USB_READY); - - if (!(Audio_Device_ConfigureEndpoints(&Speaker_Audio_Interface))) - LEDs_SetAllLEDs(LEDMASK_USB_ERROR); -} - -/** Event handler for the library USB Unhandled Control Request event. */ -void EVENT_USB_Device_UnhandledControlRequest(void) -{ - Audio_Device_ProcessControlRequest(&Speaker_Audio_Interface); -} +/* + LUFA Library + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2010 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 + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + The author disclaim all warranties with regard to this + software, including all implied warranties of merchantability + and fitness. In no event shall the author be liable for any + special, indirect or consequential damages or any damages + whatsoever resulting from loss of use, data or profits, whether + in an action of contract, negligence or other tortious action, + arising out of or in connection with the use or performance of + this software. +*/ + +/** \file + * + * Main source file for the AudioOutput demo. This file contains the main tasks of + * the demo and is responsible for the initial application hardware configuration. + */ + +#include "AudioOutput.h" + +/** LUFA Audio Class driver interface configuration and state information. This structure is + * passed to all Audio Class driver functions, so that multiple instances of the same class + * within a device can be differentiated from one another. + */ +USB_ClassInfo_Audio_Device_t Speaker_Audio_Interface = + { + .Config = + { + .StreamingInterfaceNumber = 1, + + .DataOUTEndpointNumber = AUDIO_STREAM_EPNUM, + .DataOUTEndpointSize = AUDIO_STREAM_EPSIZE, + }, + }; + +/** Main program entry point. This routine contains the overall program flow, including initial + * setup of all components and the main program loop. + */ +int main(void) +{ + SetupHardware(); + + LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); + sei(); + + for (;;) + { + Audio_Device_USBTask(&Speaker_Audio_Interface); + USB_USBTask(); + } +} + +/** Configures the board hardware and chip peripherals for the demo's functionality. */ +void SetupHardware(void) +{ + /* Disable watchdog if enabled by bootloader/fuses */ + MCUSR &= ~(1 << WDRF); + wdt_disable(); + + /* Disable clock division */ + clock_prescale_set(clock_div_1); + + /* Hardware Initialization */ + LEDs_Init(); + USB_Init(); +} + +/** ISR to handle the reloading of the PWM timer with the next sample. */ +ISR(TIMER0_COMPA_vect, ISR_BLOCK) +{ + uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint(); + + if (Audio_Device_IsSampleReceived(&Speaker_Audio_Interface)) + { + /* Retrieve the signed 16-bit left and right audio samples, convert to 8-bit */ + int8_t LeftSample_8Bit = (Audio_Device_ReadSample16(&Speaker_Audio_Interface) >> 8); + int8_t RightSample_8Bit = (Audio_Device_ReadSample16(&Speaker_Audio_Interface) >> 8); + + /* 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); + + #if defined(AUDIO_OUT_MONO) + /* Load the sample into the PWM timer channel */ + OCR3A = (MixedSample_8Bit ^ (1 << 7)); + #elif defined(AUDIO_OUT_STEREO) + /* Load the dual 8-bit samples into the PWM timer channels */ + OCR3A = (LeftSample_8Bit ^ (1 << 7)); + OCR3B = (RightSample_8Bit ^ (1 << 7)); + #elif defined(AUDIO_OUT_PORTC) + /* Load the 8-bit mixed sample into PORTC */ + PORTC = MixedSample_8Bit; + #endif + + uint8_t LEDMask = LEDS_NO_LEDS; + + /* Turn on LEDs as the sample amplitude increases */ + if (MixedSample_8Bit > 16) + LEDMask = (LEDS_LED1 | LEDS_LED2 | LEDS_LED3 | LEDS_LED4); + else if (MixedSample_8Bit > 8) + LEDMask = (LEDS_LED1 | LEDS_LED2 | LEDS_LED3); + else if (MixedSample_8Bit > 4) + LEDMask = (LEDS_LED1 | LEDS_LED2); + else if (MixedSample_8Bit > 2) + LEDMask = (LEDS_LED1); + + LEDs_SetAllLEDs(LEDMask); + } + + Endpoint_SelectEndpoint(PrevEndpoint); +} + +/** Event handler for the library USB Connection event. */ +void EVENT_USB_Device_Connect(void) +{ + LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); + + /* Sample reload timer initialization */ + TIMSK0 = (1 << OCIE0A); + OCR0A = ((F_CPU / 8 / AUDIO_SAMPLE_FREQUENCY) - 1); + TCCR0A = (1 << WGM01); // CTC mode + TCCR0B = (1 << CS01); // Fcpu/8 speed + + #if defined(AUDIO_OUT_MONO) + /* Set speaker as output */ + DDRC |= (1 << 6); + #elif defined(AUDIO_OUT_STEREO) + /* Set speakers as outputs */ + DDRC |= ((1 << 6) | (1 << 5)); + #elif defined(AUDIO_OUT_PORTC) + /* Set PORTC as outputs */ + DDRC |= 0xFF; + #endif + + #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO)) + /* PWM speaker timer initialization */ + 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, F_CPU speed + #endif +} + +/** Event handler for the library USB Disconnection event. */ +void EVENT_USB_Device_Disconnect(void) +{ + LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); + + /* Stop the sample reload timer */ + TCCR0B = 0; + + #if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO)) + /* Stop the PWM generation timer */ + TCCR3B = 0; + #endif + + #if defined(AUDIO_OUT_MONO) + /* Set speaker as input to reduce current draw */ + DDRC &= ~(1 << 6); + #elif defined(AUDIO_OUT_STEREO) + /* Set speakers as inputs to reduce current draw */ + DDRC &= ~((1 << 6) | (1 << 5)); + #elif defined(AUDIO_OUT_PORTC) + /* Set PORTC low */ + PORTC = 0x00; + #endif +} + +/** Event handler for the library USB Configuration Changed event. */ +void EVENT_USB_Device_ConfigurationChanged(void) +{ + bool ConfigSuccess = true; + + ConfigSuccess &= Audio_Device_ConfigureEndpoints(&Speaker_Audio_Interface); + + LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR); +} + +/** Event handler for the library USB Control Request reception event. */ +void EVENT_USB_Device_ControlRequest(void) +{ + Audio_Device_ProcessControlRequest(&Speaker_Audio_Interface); +} +