Ali Saidi
This library is a very low level interface to a transmit IR codes. Other libraries could be built on top of it to transmit different manufactures codes, or a specific code. I use the library to remotely trigger a Nikon DSLR camera the same way an ML3 Nikon remote does.
TxIR.cpp@1:208b4f080b2f, 2010-12-12 (annotated)
- Committer:
- ASaidi
- Date:
- Sun Dec 12 05:40:01 2010 +0000
- Revision:
- 1:208b4f080b2f
- Parent:
- 0:7d2088337345
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| ASaidi | 0:7d2088337345 | 1 | |
| ASaidi | 0:7d2088337345 | 2 | /****************************************************************************** |
| ASaidi | 0:7d2088337345 | 3 | * Low level infrared transmission |
| ASaidi | 0:7d2088337345 | 4 | * This library provides a low level interface to send IR commands. in principle |
| ASaidi | 0:7d2088337345 | 5 | * other higher level IR type remotes could be build on top of this. I wrote |
| ASaidi | 0:7d2088337345 | 6 | * this code to send IR commands to a Nikon camera, which it works rather well |
| ASaidi | 0:7d2088337345 | 7 | * for. |
| ASaidi | 0:7d2088337345 | 8 | * |
| ASaidi | 0:7d2088337345 | 9 | * Copyright (C) 2010 Ali Saidi |
| ASaidi | 0:7d2088337345 | 10 | * |
| ASaidi | 0:7d2088337345 | 11 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| ASaidi | 0:7d2088337345 | 12 | * of this software and associated documentation files (the "Software"), to deal |
| ASaidi | 0:7d2088337345 | 13 | * in the Software without restriction, including without limitation the rights |
| ASaidi | 0:7d2088337345 | 14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| ASaidi | 0:7d2088337345 | 15 | * copies of the Software, and to permit persons to whom the Software is |
| ASaidi | 0:7d2088337345 | 16 | * furnished to do so, subject to the following conditions: |
| ASaidi | 0:7d2088337345 | 17 | * |
| ASaidi | 0:7d2088337345 | 18 | * The above copyright notice and this permission notice shall be included in |
| ASaidi | 0:7d2088337345 | 19 | * all copies or substantial portions of the Software. |
| ASaidi | 0:7d2088337345 | 20 | * |
| ASaidi | 0:7d2088337345 | 21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| ASaidi | 0:7d2088337345 | 22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| ASaidi | 0:7d2088337345 | 23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| ASaidi | 0:7d2088337345 | 24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| ASaidi | 0:7d2088337345 | 25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| ASaidi | 0:7d2088337345 | 26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| ASaidi | 0:7d2088337345 | 27 | * THE SOFTWARE. |
| ASaidi | 0:7d2088337345 | 28 | */ |
| ASaidi | 0:7d2088337345 | 29 | |
| ASaidi | 0:7d2088337345 | 30 | #include "TxIR.hpp" |
| ASaidi | 0:7d2088337345 | 31 | |
| ASaidi | 0:7d2088337345 | 32 | |
| ASaidi | 0:7d2088337345 | 33 | void |
| ASaidi | 0:7d2088337345 | 34 | TxIR::doAction() |
| ASaidi | 0:7d2088337345 | 35 | { |
| ASaidi | 0:7d2088337345 | 36 | if (pos >= len) { |
| ASaidi | 0:7d2088337345 | 37 | delete [] data; |
| ASaidi | 0:7d2088337345 | 38 | _inUse = false; |
| ASaidi | 0:7d2088337345 | 39 | txPin.write(0); |
| ASaidi | 0:7d2088337345 | 40 | return; |
| ASaidi | 0:7d2088337345 | 41 | } |
| ASaidi | 0:7d2088337345 | 42 | |
| ASaidi | 0:7d2088337345 | 43 | delay.attach_us(this, &TxIR::doAction, data[pos++]); |
| ASaidi | 0:7d2088337345 | 44 | if (high) |
| ASaidi | 0:7d2088337345 | 45 | txPin.write(0); |
| ASaidi | 0:7d2088337345 | 46 | else |
| ASaidi | 0:7d2088337345 | 47 | txPin.write(0.5); |
| ASaidi | 0:7d2088337345 | 48 | high = !high; |
| ASaidi | 0:7d2088337345 | 49 | } |
| ASaidi | 0:7d2088337345 | 50 | |
| ASaidi | 0:7d2088337345 | 51 | bool |
| ASaidi | 0:7d2088337345 | 52 | TxIR::txSeq(unsigned freq, unsigned _len, const unsigned *_data) |
| ASaidi | 0:7d2088337345 | 53 | { |
| ASaidi | 0:7d2088337345 | 54 | // @todo a lock or semaphore should be used here |
| ASaidi | 0:7d2088337345 | 55 | if (inUse()) |
| ASaidi | 0:7d2088337345 | 56 | return false; |
| ASaidi | 0:7d2088337345 | 57 | _inUse = true; |
| ASaidi | 0:7d2088337345 | 58 | |
| ASaidi | 0:7d2088337345 | 59 | // keep a copy of the data, so it can't change |
| ASaidi | 0:7d2088337345 | 60 | len = _len; |
| ASaidi | 0:7d2088337345 | 61 | data = new unsigned[len]; |
| ASaidi | 0:7d2088337345 | 62 | memcpy(data, _data, len * sizeof(unsigned)); |
| ASaidi | 0:7d2088337345 | 63 | pos = 0; |
| ASaidi | 0:7d2088337345 | 64 | |
| ASaidi | 0:7d2088337345 | 65 | // setup the PWM |
| ASaidi | 0:7d2088337345 | 66 | txPin.write(0.0); |
| ASaidi | 0:7d2088337345 | 67 | txPin.period_us(freq); |
| ASaidi | 0:7d2088337345 | 68 | |
| ASaidi | 0:7d2088337345 | 69 | // Get the interrupt ready |
| ASaidi | 0:7d2088337345 | 70 | delay.detach(); |
| ASaidi | 0:7d2088337345 | 71 | high = true; |
| ASaidi | 0:7d2088337345 | 72 | delay.attach_us(this, &TxIR::doAction, data[pos++]); |
| ASaidi | 0:7d2088337345 | 73 | |
| ASaidi | 0:7d2088337345 | 74 | // Begin |
| ASaidi | 0:7d2088337345 | 75 | txPin.write(0.5); |
| ASaidi | 0:7d2088337345 | 76 | |
| ASaidi | 0:7d2088337345 | 77 | return true; |
| ASaidi | 0:7d2088337345 | 78 | } |