90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*
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* softPwm.c:
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* Test of the software PWM driver. Needs 8 LEDs connected
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* to the Pi - e.g. Ladder board.
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*
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* Copyright (c) 2012-2013 Gordon Henderson. <projects@drogon.net>
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***********************************************************************
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* This file is part of wiringPi:
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* https://projects.drogon.net/raspberry-pi/wiringpi/
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*
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* wiringPi is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* wiringPi is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
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***********************************************************************
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <wiringPi.h>
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#include <softPwm.h>
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#define RANGE 100
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#define NUM_LEDS 8
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int ledMap [NUM_LEDS] = { 0, 1, 2, 3, 4, 5, 6, 7 } ;
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int values [NUM_LEDS] = { 0, 25, 50, 75, 100, 75, 50, 25 } ;
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int main ()
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{
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int i, j ;
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char buf [80] ;
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wiringPiSetup () ;
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for (i = 0 ; i < NUM_LEDS ; ++i)
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{
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softPwmCreate (ledMap [i], 0, RANGE) ;
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printf ("%3d, %3d, %3d\n", i, ledMap [i], values [i]) ;
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}
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fgets (buf, 80, stdin) ;
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// Bring all up one by one:
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for (i = 0 ; i < NUM_LEDS ; ++i)
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for (j = 0 ; j <= 100 ; ++j)
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{
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softPwmWrite (ledMap [i], j) ;
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delay (10) ;
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}
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fgets (buf, 80, stdin) ;
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// All Down
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for (i = 100 ; i > 0 ; --i)
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{
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for (j = 0 ; j < NUM_LEDS ; ++j)
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softPwmWrite (ledMap [j], i) ;
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delay (10) ;
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}
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fgets (buf, 80, stdin) ;
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for (;;)
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{
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for (i = 0 ; i < NUM_LEDS ; ++i)
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softPwmWrite (ledMap [i], values [i]) ;
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delay (50) ;
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i = values [0] ;
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for (j = 0 ; j < NUM_LEDS - 1 ; ++j)
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values [j] = values [j + 1] ;
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values [NUM_LEDS - 1] = i ;
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}
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}
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