diff options
Diffstat (limited to 'Demos/Host/ClassDriver/AudioInputHost/AudioInputHost.c')
| -rw-r--r-- | Demos/Host/ClassDriver/AudioInputHost/AudioInputHost.c | 239 | 
1 files changed, 239 insertions, 0 deletions
| diff --git a/Demos/Host/ClassDriver/AudioInputHost/AudioInputHost.c b/Demos/Host/ClassDriver/AudioInputHost/AudioInputHost.c new file mode 100644 index 0000000000..ad45011512 --- /dev/null +++ b/Demos/Host/ClassDriver/AudioInputHost/AudioInputHost.c @@ -0,0 +1,239 @@ +/* +             LUFA Library +     Copyright (C) Dean Camera, 2017. + +  dean [at] fourwalledcubicle [dot] com +           www.lufa-lib.org +*/ + +/* +  Copyright 2017  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 disclaims 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 AudioInputHost demo. This file contains the main tasks of + *  the demo and is responsible for the initial application hardware configuration. + */ + +#include "AudioInputHost.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_Host_t Microphone_Audio_Interface = +	{ +		.Config = +			{ +				.DataINPipe             = +					{ +						.Address        = (PIPE_DIR_IN  | 1), +					}, +			}, +	}; + + +/** Main program entry point. This routine configures the hardware required by the application, then + *  enters a loop to run the application tasks in sequence. + */ +int main(void) +{ +	SetupHardware(); + +	puts_P(PSTR(ESC_FG_CYAN "Audio Input Host Demo running.\r\n" ESC_FG_WHITE)); + +	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); +	GlobalInterruptEnable(); + +	for (;;) +	{ +		Audio_Host_USBTask(&Microphone_Audio_Interface); +		USB_USBTask(); +	} +} + +/** ISR to handle the reloading of the PWM timer with the next sample. */ +ISR(TIMER0_COMPA_vect, ISR_BLOCK) +{ +	uint8_t PrevPipe = Pipe_GetCurrentPipe(); + +	/* Check that the USB bus is ready for the next sample to read */ +	if (Audio_Host_IsSampleReceived(&Microphone_Audio_Interface)) +	{ +		/* Retrieve the signed 16-bit audio sample, convert to 8-bit */ +		int8_t Sample_8Bit = (Audio_Host_ReadSample16(&Microphone_Audio_Interface) >> 8); + +		/* Load the sample into the PWM timer channel */ +		OCR3A = (Sample_8Bit ^ (1 << 7)); + +		uint8_t LEDMask = LEDS_NO_LEDS; + +		/* Turn on LEDs as the sample amplitude increases */ +		if (Sample_8Bit > 16) +		  LEDMask = (LEDS_LED1 | LEDS_LED2 | LEDS_LED3 | LEDS_LED4); +		else if (Sample_8Bit > 8) +		  LEDMask = (LEDS_LED1 | LEDS_LED2 | LEDS_LED3); +		else if (Sample_8Bit > 4) +		  LEDMask = (LEDS_LED1 | LEDS_LED2); +		else if (Sample_8Bit > 2) +		  LEDMask = (LEDS_LED1); + +		LEDs_SetAllLEDs(LEDMask); +	} + +	Pipe_SelectPipe(PrevPipe); +} + +/** Configures the board hardware and chip peripherals for the demo's functionality. */ +void SetupHardware(void) +{ +#if (ARCH == ARCH_AVR8) +	/* Disable watchdog if enabled by bootloader/fuses */ +	MCUSR &= ~(1 << WDRF); +	wdt_disable(); + +	/* Disable clock division */ +	clock_prescale_set(clock_div_1); +#endif + +	/* Hardware Initialization */ +	Serial_Init(9600, false); +	LEDs_Init(); +	USB_Init(); + +	/* Create a stdio stream for the serial port for stdin and stdout */ +	Serial_CreateStream(NULL); +} + +/** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and + *  starts the library USB task to begin the enumeration and USB management process. + */ +void EVENT_USB_Host_DeviceAttached(void) +{ +	puts_P(PSTR("Device Attached.\r\n")); +	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); +} + +/** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and + *  stops the library USB task management process. + */ +void EVENT_USB_Host_DeviceUnattached(void) +{ +	puts_P(PSTR("\r\nDevice Unattached.\r\n")); +	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); +} + +/** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully + *  enumerated by the host and is now ready to be used by the application. + */ +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(&Microphone_Audio_Interface, +	                              ConfigDescriptorSize, ConfigDescriptorData) != AUDIO_ENUMERROR_NoError) +	{ +		puts_P(PSTR("Attached Device Not a Valid Audio Input 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(&Microphone_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(&Microphone_Audio_Interface, Microphone_Audio_Interface.Config.DataINPipe.Address, +	                                      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 + +	/* Set speaker as output */ +	DDRC   |= (1 << 6); + +	/* PWM speaker timer initialization */ +	TCCR3A  = ((1 << WGM30) | (1 << COM3A1) | (1 << COM3A0)); // Set on match, clear on TOP +	TCCR3B  = ((1 << WGM32) | (1 << CS30));  // Fast 8-Bit PWM, F_CPU speed + +	puts_P(PSTR("Audio Device Enumerated.\r\n")); +	LEDs_SetAllLEDs(LEDMASK_USB_READY); +} + +/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */ +void EVENT_USB_Host_HostError(const uint8_t ErrorCode) +{ +	USB_Disable(); + +	printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n" +	                         " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode); + +	LEDs_SetAllLEDs(LEDMASK_USB_ERROR); +	for(;;); +} + +/** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while + *  enumerating an attached USB device. + */ +void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode, +                                            const uint8_t SubErrorCode) +{ +	printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n" +	                         " -- Error Code %d\r\n" +	                         " -- Sub Error Code %d\r\n" +	                         " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState); + +	LEDs_SetAllLEDs(LEDMASK_USB_ERROR); +} + | 
