main.cpp

00001 /*
00002 * ----------------------------
00003 * TriggerNiNo 1.0 (2016-09-26)
00004 * ----------------------------
00005 * LVTTL HW Trigger with control via virtual Serial over USB.
00006 * Works well with NUCLEO-F031K6 and NUCLEO-F411RE.
00007 *
00008 * Copyright (c) 2016, Martin Wolker (neolker@gmail.com)
00009 * All rights reserved.
00010 *
00011 * Redistribution and use in source and binary forms, with or without
00012 * modification, are permitted provided that the following conditions are met:
00013 *     - Redistributions of source code must retain the above copyright
00014 *       notice, this list of conditions and the following disclaimer.
00015 *     - Redistributions in binary form must reproduce the above copyright
00016 *       notice, this list of conditions and the following disclaimer in the
00017 *       documentation and/or other materials provided with the distribution.
00018 *     - Neither the name of Martin Wolker nor the
00019 *       names of its contributors may be used to endorse or promote products
00020 *       derived from this software without specific prior written permission.
00021 *
00022 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
00023 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
00024 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00025 * DISCLAIMED. IN NO EVENT SHALL MARTIN WOLKER BE LIABLE FOR ANY
00026 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
00027 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
00028 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
00029 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00030 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00031 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032 */
00033 
00034 #include "mbed.h"
00035 #define TRIGGER_PULSE_LENGTH_MS   500
00036 
00037 Serial pc(USBTX, USBRX);
00038 DigitalOut trigger_output_positive(D2);
00039 DigitalOut trigger_output_negative(D3);
00040 DigitalOut trigger_indication(LED1);
00041 
00042 void trigger(void)
00043 {
00044     trigger_output_positive =! trigger_output_positive;
00045     trigger_output_negative =! trigger_output_negative;
00046     trigger_indication =! trigger_indication;
00047 }
00048 
00049 void interrupt(void)
00050 {
00051     pc.getc();
00052     trigger();
00053     wait_ms(TRIGGER_PULSE_LENGTH_MS);
00054     trigger();
00055 }
00056 
00057 int main(void)
00058 {
00059     pc.attach(&interrupt);
00060     trigger_output_positive = 0;
00061     trigger_output_negative = 1;
00062     trigger_indication = 0;
00063     while(1) {}
00064 }