Diff: AppleRemote.cpp

Revision:

0:a5f26ed3f510

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AppleRemote.cpp	Sun Aug 08 11:19:56 2010 +0000
@@ -0,0 +1,163 @@
+/**
+ * @section LICENSE
+ *
+ * This source code is "zlib" license. 
+ * Of course, this is not a part of the zlib software. 
+ * The license is zlib license. 
+ *
+ * Copyright (C) 2010 tosihisa
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ * @section DESCRIPTION
+ *
+ * Apple Remote Decoder
+ * http://en.wikipedia.org/wiki/Apple_Remote
+ *
+ */
+
+#include "mbed.h"
+#include "AppleRemote.h"
+
+AppleRemote::AppleRemote( PinName _ir ) : IR(_ir) , nowStart(0) , _repeatEnable(0)
+{
+    reset();
+    stop();
+}
+
+void AppleRemote::reset()
+{
+    IR_Timer.reset();
+    cjobst = WAIT_READER;
+    bit_index = 0;
+    pre_IR_code = IR_code = 0;
+    pre_timer = 0;
+}
+
+void AppleRemote::start()
+{
+    if(nowStart == 0){
+        reset();
+        IR.fall(this,&AppleRemote::IR_fall);
+        IR.rise(this,&AppleRemote::IR_rise);
+        IR_Timer.start();
+        nowStart = 1;
+    }
+}
+
+void AppleRemote::stop()
+{
+    nowStart = 0;
+    IR_Timer.stop();
+    IR.fall(NULL);
+    IR.rise(NULL);
+}
+
+int AppleRemote::readable()
+{
+    return (widx == ridx) ? 0 : 1;
+}
+
+int AppleRemote::getc()
+{
+    int retval = -1;
+    if(readable()){
+        retval = static_cast<unsigned short>(buf[ridx]);
+        ridx = (ridx + 1) & (bufsize-1);
+    }
+    return retval;
+}
+
+void AppleRemote::repeat(int enable)
+{
+    _repeatEnable = enable;
+}
+
+void AppleRemote::IR_fall()
+{
+    int us;
+    if(cjobst == WAIT_READER){
+        IR_Timer.reset();
+        pre_timer = 0;
+        cjobst = CHK_READER_1ST;
+    } else if(cjobst == CHK_READER_2ND){
+        us = IR_Timer.read_us();
+        if(((us - pre_timer) > 4400) && ((us - pre_timer) < 4600)){
+            //printf("Get Reader-code\n");
+            cjobst = CHK_CODE_1ST;
+            pre_timer = us;
+        } else if(((us - pre_timer) > 1900) && ((us - pre_timer) < 2350)){
+            //printf("Get Repeat-code\n");
+            if((_repeatEnable != 0) && (pre_IR_code != 0)){
+                if((widx + 1) != ridx){
+                    buf[widx] = static_cast<unsigned short>(pre_IR_code >> 16);
+                    widx = (widx + 1) & (bufsize-1);
+                }
+            }
+            cjobst = WAIT_READER;
+        } else {
+            cjobst = WAIT_READER;
+        }
+    } else if(cjobst == CHK_CODE_2ND){
+        us = IR_Timer.read_us();
+        if((us - pre_timer) > 3000){
+            /* Error. too long (over 3msec). */
+            cjobst = WAIT_READER;
+        } else {
+            IR_code |= (((us - pre_timer) < (1125+(1125/2))) ? (0) : (1)) << bit_index;
+            bit_index++;
+            pre_timer = us;
+            cjobst = CHK_CODE_1ST;
+            if(bit_index >= 32){
+                cjobst = CHK_STOP_1ST;
+            }
+        }
+    } else if(cjobst == CHK_STOP_2ND){
+        //printf("CODE:[%08lX]\n",IR_code);
+        if((IR_code & 0xffff) == ID){
+            if((widx + 1) != ridx){
+                buf[widx] = static_cast<unsigned short>(IR_code >> 16);
+                widx = (widx + 1) & (bufsize-1);
+            }
+            pre_IR_code = IR_code;
+        }
+        cjobst = WAIT_READER;
+        bit_index = 0;
+        IR_code = 0;
+    }
+}
+
+void AppleRemote::IR_rise()
+{
+    int us;
+    if(cjobst == CHK_READER_1ST){
+        us = IR_Timer.read_us();
+        if((us > 8800) && (us < 9500)){
+            cjobst = CHK_READER_2ND;
+            pre_timer = us;
+        } else {
+            cjobst = WAIT_READER;
+        }
+    } else if(cjobst == CHK_CODE_1ST){
+        cjobst = CHK_CODE_2ND;
+    } else if(cjobst == CHK_STOP_1ST){
+        cjobst = CHK_STOP_2ND;
+    } else {
+        cjobst = WAIT_READER;
+    }
+}
+