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Diffstat (limited to 'Projects/LEDNotifier/LEDNotifier.c')
| -rw-r--r-- | Projects/LEDNotifier/LEDNotifier.c | 178 | 
1 files changed, 178 insertions, 0 deletions
| diff --git a/Projects/LEDNotifier/LEDNotifier.c b/Projects/LEDNotifier/LEDNotifier.c new file mode 100644 index 0000000000..f399e1164f --- /dev/null +++ b/Projects/LEDNotifier/LEDNotifier.c @@ -0,0 +1,178 @@ +/* +             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 LEDNotfier project. This file contains the main tasks of + *  the project and is responsible for the initial application hardware configuration. + */ + +#include "LEDNotifier.h" + +/** LUFA CDC Class driver interface configuration and state information. This structure is + *  passed to all CDC Class driver functions, so that multiple instances of the same class + *  within a device can be differentiated from one another. + */ +USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface = +	{ +		.Config = +			{ +				.ControlInterfaceNumber   = INTERFACE_ID_CDC_CCI, +				.DataINEndpoint           = +					{ +						.Address          = CDC_TX_EPADDR, +						.Size             = CDC_TXRX_EPSIZE, +						.Banks            = 1, +					}, +				.DataOUTEndpoint = +					{ +						.Address          = CDC_RX_EPADDR, +						.Size             = CDC_TXRX_EPSIZE, +						.Banks            = 1, +					}, +				.NotificationEndpoint = +					{ +						.Address          = CDC_NOTIFICATION_EPADDR, +						.Size             = CDC_NOTIFICATION_EPSIZE, +						.Banks            = 1, +					}, +			}, +	}; + +/** Counter for the software PWM. */ +static volatile uint8_t SoftPWM_Count; + +/** Duty cycle for the first software PWM channel. */ +static volatile uint8_t SoftPWM_Channel1_Duty; + +/** Duty cycle for the second software PWM channel. */ +static volatile uint8_t SoftPWM_Channel2_Duty; + +/** Duty cycle for the third software PWM channel. */ +static volatile uint8_t SoftPWM_Channel3_Duty; + +/** Standard file stream for the CDC interface when set up, so that the virtual CDC COM port can be + *  used like any regular character stream in the C APIs. + */ +static FILE USBSerialStream; + + +/** Interrupt handler for managing the software PWM channels for the LEDs */ +ISR(TIMER0_COMPA_vect, ISR_BLOCK) +{ +	uint8_t LEDMask = LEDS_ALL_LEDS; + +	if (++SoftPWM_Count == 0b00011111) +	  SoftPWM_Count = 0; + +	if (SoftPWM_Count >= SoftPWM_Channel1_Duty) +	  LEDMask &= ~LEDS_LED1; + +	if (SoftPWM_Count >= SoftPWM_Channel2_Duty) +	  LEDMask &= ~LEDS_LED2; + +	if (SoftPWM_Count >= SoftPWM_Channel3_Duty) +	  LEDMask &= ~LEDS_LED3; + +	LEDs_SetAllLEDs(LEDMask); +} + +/** 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(); + +	/* Create a regular blocking character stream for the interface so that it can be used with the stdio.h functions */ +	CDC_Device_CreateBlockingStream(&VirtualSerial_CDC_Interface, &USBSerialStream); + +	GlobalInterruptEnable(); + +	for (;;) +	{ +		/* Read in next LED colour command from the host */ +		uint8_t ColourUpdate = fgetc(&USBSerialStream); + +		/* Top 3 bits select the LED, bottom 5 control the brightness */ +		uint8_t Channel = (ColourUpdate & 0b11100000); +		uint8_t Duty    = (ColourUpdate & 0b00011111); + +		if (Channel & (1 << 5)) +		  SoftPWM_Channel1_Duty = Duty; + +		if (Channel & (1 << 6)) +		  SoftPWM_Channel2_Duty = Duty; + +		if (Channel & (1 << 7)) +		  SoftPWM_Channel3_Duty = Duty; + +		fputc(&USBSerialStream, ColourUpdate); + +		CDC_Device_USBTask(&VirtualSerial_CDC_Interface); +		USB_USBTask(); +	} +} + +/** 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 */ +	LEDs_Init(); +	USB_Init(); + +	/* Timer Initialization */ +	OCR0A  = 100; +	TCCR0A = (1 << WGM01); +	TCCR0B = (1 << CS00); +	TIMSK0 = (1 << OCIE0A); +} + +/** Event handler for the library USB Configuration Changed event. */ +void EVENT_USB_Device_ConfigurationChanged(void) +{ +	CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface); +} + +/** Event handler for the library USB Control Request reception event. */ +void EVENT_USB_Device_ControlRequest(void) +{ +	CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface); +} + | 
