scan a 3x4 keypad with softaware pulldown resistors by polling it continuously.
Fork of keypad by
Revision 1:b8305e120e11, committed 2015-05-08
- 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
--- 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
