Diff: Rc6.h

Revision:

0:f8e2ed766064

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Rc6.h	Sun Feb 27 20:28:35 2011 +0000
@@ -0,0 +1,106 @@
+/* mbed RC6 (Philips remote control protocol) library
+ * Copyright (c) 2011 Jeroen Hilgers
+ *
+ * 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.
+ */
+ 
+ #ifndef __RC6_H__
+ #define __RC6_H__
+ 
+ #include "mbed.h"
+
+/** RC6 (Philips remote control) receiver / transmitter library.
+  *
+  * Example: Code receiver for 'play/pause' on remote for Philips HDD&DVD recorder.
+  * 
+  * Leader  |S3|S2|S1|S0|Togl|A7|A6|A5|A4|A3|A2|A1|A0|D7|D6|D5|D4|D3|D2|D1|D0|
+  *         |1 |0 |0 |0 |1   |0 |0 |1 |1 |0 |0 |1 |0 |0 |0 |1 |0 |1 |1 |0 |0 |
+  *         |  |  |  |  |    |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
+  * ------  |- | -| -| -|--  | -| -|- |- | -| -|- | -| -| -|- | -|- |- | -| -|
+  *       --| -|- |- |- |  --|- |- | -| -|- |- | -|- |- |- | -|- | -| -|- |- |
+  *         |  |  |  |  |    |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
+  *
+  * The toggle bit is in bit 16, A7-A0 in bits 15-8, D7-D0 in bits 7-0.
+  * Thus for the example, 0x1322C is returned. S3..S0 are not implemented
+  * and received / transmitted as shown in the example.
+  */
+  
+ class Rc6Transmitter
+ {
+    public:
+        /** Create a Rc6Transmitter and initizalize it.
+         *
+         * @param pin irPin pin connected IR Led (led on on high level).
+         */
+        Rc6Transmitter(PinName irPin);
+
+        /** Send a code once. 
+         * The function will return synchronously and send the code once. 
+         *
+         * @param code Code to send.
+         */
+        void Send(uint32_t code);
+        
+        /** Check if the transmitter is idle.
+         * 
+         * @return True if transmitter still busy.
+         */
+        bool IsBusy();
+    
+    private:
+        void Tick();
+    
+        bool mBusy;
+        uint16_t mPattern[50];  // 1 leader, 4 startbits, 1 toggle bit, 16 data bits ==>
+                                // at most 24 mark / pause durations + 0,0 terminator = 50 entries. 
+        Ticker mTicker;
+        uint16_t mMark;          // Tick: Remaining half-cycles of mark.
+        uint16_t mPause;         // Tick: Remaining half-cycles of pause.        
+        uint16_t *mPatPtr;       // Transitter pointer.
+        DigitalOut mOut;     // Pin connected to IR.
+};
+ 
+ class Rc6Receiver
+ {
+    public:
+        /** Create a Rc6Receiver and initizalize it.
+         *
+         * @param pin irPin pin connected to IR sensor (low level when IR is received, e.g. TSOP1736).
+         */
+        Rc6Receiver(PinName irPin);
+
+        /** Check if anything was received since last poll. Returns 0xFFFFFFFF if not.
+         *
+         * @return Last code received or 0xFFFFFFFF if nothing was received since last poll.
+         */
+        uint32_t Receive();
+        
+    private:
+        InterruptIn irq;
+        void OnRise();
+        void OnFall();
+        void OnTimeout();
+        Timeout mTimeout;
+        Timer mTimer;
+        bool mBusy;
+        uint32_t mCode;  
+        uint32_t mLastCode;
+ };
+  
+ #endif // __RC6_H__
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