Diff: ID12RFID.cpp

Revision:

0:7e4786a3584b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ID12RFID.cpp	Thu Oct 11 20:49:25 2012 +0000
@@ -0,0 +1,53 @@
+/* mbed ID12 RFID Library
+ * Copyright (c) 2007-2010, sford, http://mbed.org
+ *
+ * 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.
+ */
+
+#include "ID12RFID.h"
+
+#include "mbed.h"
+
+ID12RFID::ID12RFID(PinName rx)
+        : _rfid(NC, rx) {
+}
+
+int ID12RFID::readable() {
+    return _rfid.readable();
+}
+
+int ID12RFID::read() {
+    while (_rfid.getc() != 2);
+
+    int v = 0;
+    _rfid.getc(); // drop 1st 2 bytes - we actually only read the lower 32-bits of the code
+    _rfid.getc();
+
+    for (int i=7; i>=0; i--) {
+        char c = _rfid.getc(); // a ascii hex char
+        int part = c - '0';
+        v |= part << (i * 4);
+    }
+    
+    for (int i=0; i<5; i++) {
+        _rfid.getc();
+    }
+    
+    return v;
+}