Diff: keypad.cpp

Revision:

0:5ea4be70fe49

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/keypad.cpp	Sat Sep 16 21:55:16 2017 +0000
@@ -0,0 +1,82 @@
+/*   Copyright (c) 2010 Dimiter Kentri
+
+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.
+*/
+
+/*Simple example
+
+#include "mbed.h"
+#include "keypad.h"
+
+Serial pc(USBTX, USBRX);
+Keypad telepad(p13,p14,p15,p16,p17,p18,p19,p20);
+
+int main(void){
+  char key;
+  pc.printf("Enter codes\n\r");
+  while(1){
+    key = telepad.getKey();
+    if(key != KEY_RELEASED){
+    pc.printf("%c\n",key);
+    wait(0.6);
+     }
+    }
+}       */
+
+#include "mbed.h"
+#include "keypad.h"
+
+using namespace mbed;
+
+Keypad::Keypad(PinName col1, PinName col2, PinName col3, PinName col4, PinName row1,PinName row2, PinName row3, PinName row4): _col1(col1),
+    _col2(col2),_col3(col3),_col4(col4),_rows(row1,row2,row3,row4)
+{
+
+}
+
+int Keypad::getKeyIndex()
+{
+    for(int k=0; k<4; k++) {
+        _rows = 0;
+    }
+    for(int i=0; i<4; i++) {
+        _rows = 1 << i;
+        for(int j=0; j<4; j++) {
+            if (_col1)
+                return 1+(i*4);
+            else if (_col2)
+                return 2+(i*4);
+            else if (_col3)
+                return 3+(i*4);
+            else if (_col4)
+                return 4+(i*4);
+        }
+    }
+    return -1;
+}
+
+char Keypad::getKey()
+{
+    int k = getKeyIndex();
+    if(k != -1)
+        return  keys[k-1];
+    else
+        return 0;
+}
+