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+/*
+ 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);
+}
+