Jeroen Hilgers / Rc6

This library implements RC6 (protocol used by some philips remotes). It has a receiver class and a transmitter class. Currently, only mode 0 is supported. It is tested with my DVD/HDD recorder.

Rc6.h@0:f8e2ed766064, 2011-02-27 (annotated)

Committer:
hilgo
Date:
Sun Feb 27 20:28:35 2011 +0000
Revision:
0:f8e2ed766064
Initial revision: Receiver does not check framing yet (thus other remotes cause junk!)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hilgo 0:f8e2ed766064 1 /* mbed RC6 (Philips remote control protocol) library
hilgo 0:f8e2ed766064 2 * Copyright (c) 2011 Jeroen Hilgers
hilgo 0:f8e2ed766064 3 *
hilgo 0:f8e2ed766064 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
hilgo 0:f8e2ed766064 5 * of this software and associated documentation files (the "Software"), to deal
hilgo 0:f8e2ed766064 6 * in the Software without restriction, including without limitation the rights
hilgo 0:f8e2ed766064 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
hilgo 0:f8e2ed766064 8 * copies of the Software, and to permit persons to whom the Software is
hilgo 0:f8e2ed766064 9 * furnished to do so, subject to the following conditions:
hilgo 0:f8e2ed766064 10 *
hilgo 0:f8e2ed766064 11 * The above copyright notice and this permission notice shall be included in
hilgo 0:f8e2ed766064 12 * all copies or substantial portions of the Software.
hilgo 0:f8e2ed766064 13 *
hilgo 0:f8e2ed766064 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
hilgo 0:f8e2ed766064 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
hilgo 0:f8e2ed766064 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
hilgo 0:f8e2ed766064 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
hilgo 0:f8e2ed766064 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
hilgo 0:f8e2ed766064 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
hilgo 0:f8e2ed766064 20 * THE SOFTWARE.
hilgo 0:f8e2ed766064 21 */
hilgo 0:f8e2ed766064 22
hilgo 0:f8e2ed766064 23 #ifndef __RC6_H__
hilgo 0:f8e2ed766064 24 #define __RC6_H__
hilgo 0:f8e2ed766064 25
hilgo 0:f8e2ed766064 26 #include "mbed.h"
hilgo 0:f8e2ed766064 27
hilgo 0:f8e2ed766064 28 /** RC6 (Philips remote control) receiver / transmitter library.
hilgo 0:f8e2ed766064 29 *
hilgo 0:f8e2ed766064 30 * Example: Code receiver for 'play/pause' on remote for Philips HDD&DVD recorder.
hilgo 0:f8e2ed766064 31 *
hilgo 0:f8e2ed766064 32 * Leader |S3|S2|S1|S0|Togl|A7|A6|A5|A4|A3|A2|A1|A0|D7|D6|D5|D4|D3|D2|D1|D0|
hilgo 0:f8e2ed766064 33 * |1 |0 |0 |0 |1 |0 |0 |1 |1 |0 |0 |1 |0 |0 |0 |1 |0 |1 |1 |0 |0 |
hilgo 0:f8e2ed766064 34 * | | | | | | | | | | | | | | | | | | | | | |
hilgo 0:f8e2ed766064 35 * ------ |- | -| -| -|-- | -| -|- |- | -| -|- | -| -| -|- | -|- |- | -| -|
hilgo 0:f8e2ed766064 36 * --| -|- |- |- | --|- |- | -| -|- |- | -|- |- |- | -|- | -| -|- |- |
hilgo 0:f8e2ed766064 37 * | | | | | | | | | | | | | | | | | | | | | |
hilgo 0:f8e2ed766064 38 *
hilgo 0:f8e2ed766064 39 * The toggle bit is in bit 16, A7-A0 in bits 15-8, D7-D0 in bits 7-0.
hilgo 0:f8e2ed766064 40 * Thus for the example, 0x1322C is returned. S3..S0 are not implemented
hilgo 0:f8e2ed766064 41 * and received / transmitted as shown in the example.
hilgo 0:f8e2ed766064 42 */
hilgo 0:f8e2ed766064 43
hilgo 0:f8e2ed766064 44 class Rc6Transmitter
hilgo 0:f8e2ed766064 45 {
hilgo 0:f8e2ed766064 46 public:
hilgo 0:f8e2ed766064 47 /** Create a Rc6Transmitter and initizalize it.
hilgo 0:f8e2ed766064 48 *
hilgo 0:f8e2ed766064 49 * @param pin irPin pin connected IR Led (led on on high level).
hilgo 0:f8e2ed766064 50 */
hilgo 0:f8e2ed766064 51 Rc6Transmitter(PinName irPin);
hilgo 0:f8e2ed766064 52
hilgo 0:f8e2ed766064 53 /** Send a code once.
hilgo 0:f8e2ed766064 54 * The function will return synchronously and send the code once.
hilgo 0:f8e2ed766064 55 *
hilgo 0:f8e2ed766064 56 * @param code Code to send.
hilgo 0:f8e2ed766064 57 */
hilgo 0:f8e2ed766064 58 void Send(uint32_t code);
hilgo 0:f8e2ed766064 59
hilgo 0:f8e2ed766064 60 /** Check if the transmitter is idle.
hilgo 0:f8e2ed766064 61 *
hilgo 0:f8e2ed766064 62 * @return True if transmitter still busy.
hilgo 0:f8e2ed766064 63 */
hilgo 0:f8e2ed766064 64 bool IsBusy();
hilgo 0:f8e2ed766064 65
hilgo 0:f8e2ed766064 66 private:
hilgo 0:f8e2ed766064 67 void Tick();
hilgo 0:f8e2ed766064 68
hilgo 0:f8e2ed766064 69 bool mBusy;
hilgo 0:f8e2ed766064 70 uint16_t mPattern[50]; // 1 leader, 4 startbits, 1 toggle bit, 16 data bits ==>
hilgo 0:f8e2ed766064 71 // at most 24 mark / pause durations + 0,0 terminator = 50 entries.
hilgo 0:f8e2ed766064 72 Ticker mTicker;
hilgo 0:f8e2ed766064 73 uint16_t mMark; // Tick: Remaining half-cycles of mark.
hilgo 0:f8e2ed766064 74 uint16_t mPause; // Tick: Remaining half-cycles of pause.
hilgo 0:f8e2ed766064 75 uint16_t *mPatPtr; // Transitter pointer.
hilgo 0:f8e2ed766064 76 DigitalOut mOut; // Pin connected to IR.
hilgo 0:f8e2ed766064 77 };
hilgo 0:f8e2ed766064 78
hilgo 0:f8e2ed766064 79 class Rc6Receiver
hilgo 0:f8e2ed766064 80 {
hilgo 0:f8e2ed766064 81 public:
hilgo 0:f8e2ed766064 82 /** Create a Rc6Receiver and initizalize it.
hilgo 0:f8e2ed766064 83 *
hilgo 0:f8e2ed766064 84 * @param pin irPin pin connected to IR sensor (low level when IR is received, e.g. TSOP1736).
hilgo 0:f8e2ed766064 85 */
hilgo 0:f8e2ed766064 86 Rc6Receiver(PinName irPin);
hilgo 0:f8e2ed766064 87
hilgo 0:f8e2ed766064 88 /** Check if anything was received since last poll. Returns 0xFFFFFFFF if not.
hilgo 0:f8e2ed766064 89 *
hilgo 0:f8e2ed766064 90 * @return Last code received or 0xFFFFFFFF if nothing was received since last poll.
hilgo 0:f8e2ed766064 91 */
hilgo 0:f8e2ed766064 92 uint32_t Receive();
hilgo 0:f8e2ed766064 93
hilgo 0:f8e2ed766064 94 private:
hilgo 0:f8e2ed766064 95 InterruptIn irq;
hilgo 0:f8e2ed766064 96 void OnRise();
hilgo 0:f8e2ed766064 97 void OnFall();
hilgo 0:f8e2ed766064 98 void OnTimeout();
hilgo 0:f8e2ed766064 99 Timeout mTimeout;
hilgo 0:f8e2ed766064 100 Timer mTimer;
hilgo 0:f8e2ed766064 101 bool mBusy;
hilgo 0:f8e2ed766064 102 uint32_t mCode;
hilgo 0:f8e2ed766064 103 uint32_t mLastCode;
hilgo 0:f8e2ed766064 104 };
hilgo 0:f8e2ed766064 105
hilgo 0:f8e2ed766064 106 #endif // __RC6_H__