main.cpp

00001 /*
00002 * -----------------------------------------
00003 * Trigger_LabSat_variant_1 1.0 (2018-04-05)
00004 * -----------------------------------------
00005 * Works well with NUCLEO-F031K6 and NUCLEO-F411RE.
00006 *
00007 * In     (D2): ---_------_---
00008 *
00009 * Out    (D3): ___--------___
00010 *
00011 * negOut (D4): ---________---
00012 *
00013 * LED  (LED1): ___--------___
00014 *
00015 * Copyright (c) 2018, Martin Wolker (neolker@gmail.com)
00016 * All rights reserved.
00017 *
00018 * Redistribution and use in source and binary forms, with or without
00019 * modification, are permitted provided that the following conditions are met:
00020 *     - Redistributions of source code must retain the above copyright
00021 *       notice, this list of conditions and the following disclaimer.
00022 *     - Redistributions in binary form must reproduce the above copyright
00023 *       notice, this list of conditions and the following disclaimer in the
00024 *       documentation and/or other materials provided with the distribution.
00025 *     - Neither the name of Martin Wolker nor the
00026 *       names of its contributors may be used to endorse or promote products
00027 *       derived from this software without specific prior written permission.
00028 *
00029 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
00030 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00031 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00032 * DISCLAIMED. IN NO EVENT SHALL MARTIN WOLKER BE LIABLE FOR ANY
00033 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
00034 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00035 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00036 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00037 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00038 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00039 */
00040 
00041 #include "mbed.h"
00042 #define TRIGGER_IGNORE_LENGTH_MS   500
00043 
00044 InterruptIn trigger_in(D2);
00045 DigitalOut  trigger_out(D3);
00046 DigitalOut  trigger_out_negative(D4);
00047 DigitalOut  trigger_led(LED1);
00048 
00049 void trigger(void)
00050 {
00051     trigger_out =! trigger_out;
00052     trigger_out_negative =! trigger_out_negative;
00053     trigger_led =! trigger_led;
00054 }
00055 
00056 void interrupt(void)
00057 {
00058     trigger();
00059     wait_ms(TRIGGER_IGNORE_LENGTH_MS);
00060 }
00061 
00062 int main(void)
00063 {
00064     //Trigger interrupt by falling edge
00065     trigger_in.fall(&interrupt);
00066 
00067     //Default state
00068     trigger_out = 0;
00069     trigger_out_negative = 1;
00070     trigger_led = 0;
00071 
00072     //Endless loop
00073     while(1) { }
00074 }