Lib for sending IR signals from mbed.
Dependents: ir-puck ir-puck2 ir-puck
IRSender.cpp
- Committer:
- cristea
- Date:
- 2014-08-05
- Revision:
- 2:4576fcd93ffd
- Parent:
- 0:741de6c95ae9
File content as of revision 2:4576fcd93ffd:
/** * 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. */ /** * Copyright 2014 Nordic Semiconductor * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License */ #include "mbed.h" #include "IRSender.h" bool IRSender::irSeq(unsigned freq, unsigned len, const unsigned *data) { // TODO: implement a lock or semaphore here if (_inUse) { return false; } _inUse = true; int pos = 0; senderPin.write(0.0); senderPin.period_us(freq); int times[len]; for (int i=0; i<len; i++) { times[i] = 0; } int bit = 1; LOG("Start\n"); senderPin.write(0.5); timer.start(); int time = timer.read_us(); int old_time = time; int dt = 0; while (pos < len) { // TODO: Handle timer overflow // Consider using GPIOTE old_time = time; time = timer.read_us(); dt += time - old_time; while (dt > data[pos] && pos < len) { dt -= data[pos]; bit = !bit; senderPin.write(0.5 * bit); times[pos] = dt; pos++; } } timer.stop(); senderPin.write(0); LOG("Success, wrote %i/%i\n", pos, len); LOG("Miss timings: %i", times[0]); for (int i=1; i<len; i++) { APPEND(", %i", times[i]); } APPEND("]\n"); _inUse = false; return true; }