Diff: keypad.cpp

Revision:

0:1fa357ea3fcc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/keypad.cpp	Sat Nov 06 14:36:22 2010 +0000
@@ -0,0 +1,78 @@
+/*	 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;
+}