scan a 3x4 keypad with softaware pulldown resistors by polling it continuously.

Fork of keypad by Dimiter K

Files at this revision

API Documentation at this revision

Comitter:
fangoman91
Date:
Fri May 08 06:50:54 2015 +0000
Parent:
0:1fa357ea3fcc
Commit message:
Dimiter Kentry update. Eliminate one column and add software pulldown resistors

Changed in this revision

keypad.cpp Show diff for this revision Revisions of this file
keypad.h Show diff for this revision Revisions of this file
keypad3x4.cpp Show annotated file Show diff for this revision Revisions of this file
keypad3x4.h Show annotated file Show diff for this revision Revisions of this file
--- a/keypad.cpp	Sat Nov 06 14:36:22 2010 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,78 +0,0 @@
-/*	 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;
-}
--- a/keypad.h	Sat Nov 06 14:36:22 2010 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,53 +0,0 @@
-/*	 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.
-*/
-
-#ifndef KEYPAD_H
-#define KEYPAD_H
-
-#include "DigitalIn.h"
-#include "BusOut.h"
-
-
-namespace mbed{
-
-const char NO_KEY = '\0';
-#define KEY_RELEASED NO_KEY
-          
-
-       
-const int keys[16] = {'1','2','3','A',
-                      '4','5','6','B',
-                      '7','8','9','C',
-                      '*','0','#','D'};
-                      
-class Keypad{    
-    public:
-        Keypad(PinName col1, PinName col2, PinName col3, PinName col4, PinName row1,PinName row2, PinName row3, PinName row4);
-        int getKeyIndex();
-        char getKey();
-
-    protected:
-        DigitalIn _col1,_col2,_col3,_col4;    
-        BusOut _rows;
-};
-
-}
-#endif
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/keypad3x4.cpp	Fri May 08 06:50:54 2015 +0000
@@ -0,0 +1,65 @@
+
+
+//Dimiter Kentri update
+
+
+/*	 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.
+*/
+
+#include "mbed.h"
+#include "keypad3x4.h"
+
+using namespace mbed;
+
+Keypad::Keypad(PinName col1,PinName col2,PinName col3,PinName row1,PinName row2,PinName row3,PinName row4):_col1(col1),_col2(col2),_col3(col3),_rows(row1,row2,row3,row4)    
+{    
+	_col1.mode(PullUp);
+	_col2.mode(PullUp);
+	_col3.mode(PullUp);      
+}     
+
+int Keypad::getKeyIndex()
+{
+    _rows = 0;   
+    for(int i=0; i<4; i++) 
+    {
+        _rows = 1 << i;     
+	    for(int j=0; j<4;j++)
+	    {         
+        	if (_col1)
+          		return 1+(i*3);
+    		else if (_col2)
+                return 2+(i*3);
+            else if (_col3)
+                return 3+(i*3);            
+        }
+    }    
+    return 11;
+}          
+
+char Keypad::getKey()
+{
+	int k = getKeyIndex();    
+	if(k != 11)
+    	return  keys[k-1];
+ 	else 
+ 		return 0;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/keypad3x4.h	Fri May 08 06:50:54 2015 +0000
@@ -0,0 +1,70 @@
+
+
+//Dimiter Kentri update
+
+
+/*	 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,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);
+	 }
+	}
+}*/
+
+#ifndef KEYPAD3x4_H
+#define KEYPAD3x4_H
+
+#include "DigitalIn.h"
+#include "BusOut.h"
+
+
+namespace mbed
+{
+	const char NO_KEY = '\0';
+	#define KEY_RELEASED NO_KEY
+	const int keys[12] = {'1','2','3','4','5','6','7','8','9','*','0','#',};                  
+	class Keypad
+	{    
+	    public:
+	        Keypad(PinName col1,PinName col2,PinName col3,PinName row1,PinName row2,PinName row3,PinName row4);
+	        char getKey();
+	    protected:
+	    	int getKeyIndex();
+	        DigitalIn _col1,_col2,_col3;    
+	        BusOut _rows;
+	};
+}
+#endif