Fork of TxIR
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TxIR.cpp
- Committer:
- sigveseb
- Date:
- 2014-06-26
- Revision:
- 2:cc8371213c85
- Parent:
- 0:7d2088337345
- Child:
- 3:bc64c2d5bc26
File content as of revision 2:cc8371213c85:
/****************************************************************************** * Low level infrared transmission * This library provides a low level interface to send IR commands. in principle * other higher level IR type remotes could be build on top of this. I wrote * this code to send IR commands to a Nikon camera, which it works rather well * for. * * Copyright (C) 2010 Ali Saidi * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "mbed.h" #include "TxIR.hpp" bool shouldFlip; Serial pc(USBTX, USBRX); Timer timer; void TxIR::doAction() { if (pos >= len) { return; } pc.printf("doAction, pos: %i\n", pos); shouldFlip = true; delay.attach_us(this, &TxIR::doAction, data[pos++] * 200); } bool TxIR::txSeq(unsigned freq, unsigned len, const unsigned *data) { // @todo a lock or semaphore should be used here if (inUse()) return false; _inUse = true; // keep a copy of the data, so it can't change pos = 0; // setup the PWM txPin.write(0.0); txPin.period_us(freq); // Get the interrupt ready delay.detach(); int times[len]; for(int i=0;i<len;i++){ times[i] = 0; } int bit = 1; pc.printf("S\n"); txPin.write(0.5); timer.start(); int time = timer.read_us(); int old_time = time; int dt = 0; while(pos < len) { old_time = time; time = timer.read_us(); dt += time - old_time; while(dt > data[pos]) { dt -= data[pos]; bit = !bit; txPin.write(0.5 * bit); times[pos] = dt; pos++; } } timer.stop(); pc.printf("Success, wrote %i/%i\n", pos, len); pc.printf("Miss timings: [%i", times[0]); for(int i=1;i<len;i++){ pc.printf(", %i", times[i]); } txPin.write(0); _inUse = false; delay.detach(); return true; }