Tom Belpasso
Cylon like sequencer for on board LEDs demo. Turns on LED and shifts it left to right and back again.
main.cpp@0:1bf2c942b27f, 2009-12-30 (annotated)
- Committer:
- tombelpasso
- Date:
- Wed Dec 30 19:41:45 2009 +0000
- Revision:
- 0:1bf2c942b27f
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| tombelpasso | 0:1bf2c942b27f | 1 | /* |
| tombelpasso | 0:1bf2c942b27f | 2 | * Cylon like sequencer for on board LEDs demo. |
| tombelpasso | 0:1bf2c942b27f | 3 | * |
| tombelpasso | 0:1bf2c942b27f | 4 | * Turns on LED and shifts it left to right and back again. |
| tombelpasso | 0:1bf2c942b27f | 5 | * |
| tombelpasso | 0:1bf2c942b27f | 6 | * Copyright (C) <2009> Tom Belpassso <tombelpasso@gmail.com> |
| tombelpasso | 0:1bf2c942b27f | 7 | * |
| tombelpasso | 0:1bf2c942b27f | 8 | * This is free software: you can redistribute it and/or modify |
| tombelpasso | 0:1bf2c942b27f | 9 | * it under the terms of the GNU General Public License as published by |
| tombelpasso | 0:1bf2c942b27f | 10 | * the Free Software Foundation, either version 3 of the License, or |
| tombelpasso | 0:1bf2c942b27f | 11 | * (at your option) any later version. |
| tombelpasso | 0:1bf2c942b27f | 12 | * |
| tombelpasso | 0:1bf2c942b27f | 13 | * OneWire/DS18S20 is distributed in the hope that it will be useful, |
| tombelpasso | 0:1bf2c942b27f | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| tombelpasso | 0:1bf2c942b27f | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| tombelpasso | 0:1bf2c942b27f | 16 | * GNU General Public License for more details. |
| tombelpasso | 0:1bf2c942b27f | 17 | * |
| tombelpasso | 0:1bf2c942b27f | 18 | * a copy of the GNU General Public License, see <http://www.gnu.org/licenses/>. |
| tombelpasso | 0:1bf2c942b27f | 19 | */ |
| tombelpasso | 0:1bf2c942b27f | 20 | |
| tombelpasso | 0:1bf2c942b27f | 21 | #include "mbed.h" |
| tombelpasso | 0:1bf2c942b27f | 22 | // configuration equates |
| tombelpasso | 0:1bf2c942b27f | 23 | // time between shifting to next LED |
| tombelpasso | 0:1bf2c942b27f | 24 | #define SHIFT_TIME 0.04 |
| tombelpasso | 0:1bf2c942b27f | 25 | // total time for sequence |
| tombelpasso | 0:1bf2c942b27f | 26 | #define REPEAT_TIME 1.0 |
| tombelpasso | 0:1bf2c942b27f | 27 | // blank time between sequences |
| tombelpasso | 0:1bf2c942b27f | 28 | #define BLANK_TIME REPEAT_TIME - 9 * SHIFT_TIME |
| tombelpasso | 0:1bf2c942b27f | 29 | |
| tombelpasso | 0:1bf2c942b27f | 30 | BusOut leds(LED1, LED2, LED3, LED4); |
| tombelpasso | 0:1bf2c942b27f | 31 | |
| tombelpasso | 0:1bf2c942b27f | 32 | int main() { |
| tombelpasso | 0:1bf2c942b27f | 33 | // i is used to turn on first LED in the sequence |
| tombelpasso | 0:1bf2c942b27f | 34 | short i = 1; |
| tombelpasso | 0:1bf2c942b27f | 35 | bool dir = 0 ; // 0 shift left, 1 shift right |
| tombelpasso | 0:1bf2c942b27f | 36 | leds = 0; |
| tombelpasso | 0:1bf2c942b27f | 37 | while(1) { |
| tombelpasso | 0:1bf2c942b27f | 38 | if (dir) |
| tombelpasso | 0:1bf2c942b27f | 39 | leds = (leds >> 1) + i; // shift down |
| tombelpasso | 0:1bf2c942b27f | 40 | else |
| tombelpasso | 0:1bf2c942b27f | 41 | leds = (leds << 1) + i; // shift |
| tombelpasso | 0:1bf2c942b27f | 42 | wait(SHIFT_TIME); |
| tombelpasso | 0:1bf2c942b27f | 43 | if (leds != 0) { // if any leds lit, don't turn any more on |
| tombelpasso | 0:1bf2c942b27f | 44 | i = 0; |
| tombelpasso | 0:1bf2c942b27f | 45 | } |
| tombelpasso | 0:1bf2c942b27f | 46 | // see if all LEDs are off |
| tombelpasso | 0:1bf2c942b27f | 47 | if (leds == 0) { |
| tombelpasso | 0:1bf2c942b27f | 48 | // leds = 0 ; |
| tombelpasso | 0:1bf2c942b27f | 49 | if (dir) { |
| tombelpasso | 0:1bf2c942b27f | 50 | dir = 0 ; // toggle directon |
| tombelpasso | 0:1bf2c942b27f | 51 | i = 1; // LSB LED on next shift |
| tombelpasso | 0:1bf2c942b27f | 52 | wait(BLANK_TIME); |
| tombelpasso | 0:1bf2c942b27f | 53 | } else { |
| tombelpasso | 0:1bf2c942b27f | 54 | dir = 1; |
| tombelpasso | 0:1bf2c942b27f | 55 | i = 8; // MSB LED on next shift |
| tombelpasso | 0:1bf2c942b27f | 56 | wait(SHIFT_TIME); |
| tombelpasso | 0:1bf2c942b27f | 57 | } |
| tombelpasso | 0:1bf2c942b27f | 58 | } |
| tombelpasso | 0:1bf2c942b27f | 59 | } |
| tombelpasso | 0:1bf2c942b27f | 60 | } |