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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); +} + |