| 0,0 → 1,108 |
|---|
| /**************************************************************************** |
| * |
| * Copyright (c) 2008 Dave Hylands <dhylands@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Alternatively, this software may be distributed under the terms of BSD |
| * license. |
| * |
| * See README and COPYING for more details. |
| * |
| ****************************************************************************/ |
| /** |
| * |
| * @file simple-flasher.c |
| * |
| * @brief Simple LED flasher for the robostix |
| * |
| ****************************************************************************/ |
| |
| /* ---- Include Files ---------------------------------------------------- */ |
| |
| #define F_CPU 16000000UL |
| |
| #include <avr/io.h> |
| #include <util/delay.h> |
| |
| /* ---- Public Variables ------------------------------------------------- */ |
| |
| /* ---- Private Constants and Types -------------------------------------- */ |
| |
| //-------------------------------------------------------------------------- |
| // LED Constants |
| |
| #define RED_LED_PIN 4 |
| #define RED_LED_MASK ( 1 << RED_LED_PIN ) |
| #define RED_LED_DDR DDRG |
| #define RED_LED_PORT PORTG |
| |
| #define BLUE_LED_PIN 3 |
| #define BLUE_LED_MASK ( 1 << BLUE_LED_PIN ) |
| #define BLUE_LED_DDR DDRG |
| #define BLUE_LED_PORT PORTG |
| |
| #define YELLOW_LED_PIN 4 |
| #define YELLOW_LED_MASK ( 1 << YELLOW_LED_PIN ) |
| #define YELLOW_LED_DDR DDRB |
| #define YELLOW_LED_PORT PORTB |
| |
| //-------------------------------------------------------------------------- |
| // Some convenience macros to turn the LEDs on/off. |
| // |
| // Usage: LED_ON( BLUE ); |
| // |
| // to turn on the blue LED. |
| // |
| // Note: Setting the pin to 0 turns the LED on. |
| |
| #define LED_ON( color ) do { color ## _LED_PORT &= ~color ## _LED_MASK; } while (0) |
| #define LED_OFF( color ) do { color ## _LED_PORT |= color ## _LED_MASK; } while (0) |
| |
| /* ---- Private Variables ------------------------------------------------ */ |
| |
| /* ---- Functions -------------------------------------------------------- */ |
| |
| //*************************************************************************** |
| /** |
| * Simple LED flasher |
| */ |
| |
| int main( void ) |
| { |
| int i; |
| int led = 0; |
| |
| // Initialize the two LED pins |
| |
| RED_LED_DDR |= RED_LED_MASK; |
| YELLOW_LED_DDR |= YELLOW_LED_MASK; |
| BLUE_LED_DDR |= BLUE_LED_MASK; |
| |
| while ( 1 ) |
| { |
| // Turn all of the LEDs off |
| |
| LED_OFF( RED ); |
| LED_OFF( BLUE ); |
| LED_OFF( YELLOW ); |
| |
| switch ( led ) |
| { |
| case 0: LED_ON( RED ); break; |
| case 1: LED_ON( BLUE ); break; |
| case 2: LED_ON( YELLOW ); break; |
| } |
| if ( ++led > 2 ) |
| { |
| led = 0; |
| } |
| |
| for ( i = 0; i < 100; i++ ) |
| { |
| _delay_ms( 1 ); |
| } |
| } |
| } |