Revision 1:1ae4a77af85b, committed 2014-01-01

Comitter:

yoonghm

Date:

Wed Jan 01 17:47:52 2014 +0000

Parent:

0:8209bcf62e0a

Commit message:

Interrupt-driven keypad interface library.; Can be used safely with RTOS.; Able to handle keypad size 4x4 and below.

Changed in this revision

--- a/FPointer.lib	Mon Jan 30 09:40:01 2012 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-http://mbed.org/users/AjK/libraries/FPointer/ll7nhv
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/keypad.lib	Wed Jan 01 17:47:52 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/yoonghm/code/keypad/#da060f8c03e8

--- a/keypad/.lib	Mon Jan 30 09:40:01 2012 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
- 
\ No newline at end of file

--- a/keypad/keypad.cpp	Mon Jan 30 09:40:01 2012 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,67 +0,0 @@
-#include "keypad.h"
-
-Keypad::Keypad(PinName row3, PinName row2, PinName row1, PinName row0,
-               PinName col3, PinName col2, PinName col1, PinName col0,
-               int debounce_ms):
-        _row0(row0), _row1(row1), _row2(row2), _row3(row3),
-        _cols(col0, col1, col2, col3) {
-    _debounce = debounce_ms;
-    _setupRiseTrigger();
-}
-
-void Keypad::Start(void) {
-    _cols = 0x0F;
-}
-
-void Keypad::Stop(void) {
-    _cols = 0x00;
-}
-
-void Keypad::CallAfterInput(uint32_t (*fptr)(uint32_t index)) {
-    _input.attach(fptr);
-}
-
-void Keypad::_callback(int row, InterruptIn &therow) {
-    wait_ms(_debounce);
-    if (therow != 1)
-        return;
-
-    int c = -1;
-    _cols = _cols & 0x0E;
-    if (therow == 0)
-        c = 0;
-    else {
-        _cols = _cols & 0x0D;
-        if (therow == 0)
-            c = 1;
-        else {
-            _cols = _cols & 0x0B;
-            if (therow == 0)
-                c = 2;
-            else
-                c = 3;
-        }
-    }
-    _input.call(row * 4 + c);
-    Start(); // Re-energize all columns
-}
-
-void Keypad::_cbRow0Rise(void) {
-    _callback(0, _row0);
-}
-void Keypad::_cbRow1Rise(void) {
-    _callback(1, _row1);
-}
-void Keypad::_cbRow2Rise(void) {
-    _callback(2, _row2);
-}
-void Keypad::_cbRow3Rise(void) {
-    _callback(3, _row3);
-}
-
-void Keypad::_setupRiseTrigger(void) {
-    _row0.rise(this, &Keypad::_cbRow0Rise);
-    _row1.rise(this, &Keypad::_cbRow1Rise);
-    _row2.rise(this, &Keypad::_cbRow2Rise);
-    _row3.rise(this, &Keypad::_cbRow3Rise);
-}
\ No newline at end of file

--- a/keypad/keypad.h	Mon Jan 30 09:40:01 2012 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,109 +0,0 @@
-/* mbed Keypad library, using user-defined interrupt callback
- * Copyright (c) 2012 Yoong Hor Meng
- *
- * 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 "mbed.h"
-#include "FPointer.h"
-
-/**
- * A interrupt-based interface to 4x4 keypad. 
- *
- * On each key pressed on a keypad, the index of the key is passed to a
- * user-defined function. User is free to define what to be done with the
- * input.
- *
- *
- * @code
- *
-* #include "mbed.h"
-* #include "keypad.h"
-* 
-* // Define your own keypad values
-* char Keytable[] = { '1', '2', '3', 'A',
-*                     '4', '5', '6', 'B',
-*                     '7', '8', '9', 'C',
-*                     '*', '0', '#', 'D'
-*                   };
-* 
-* uint32_t cbAfterInput(uint32_t index) {
-*     printf("Index:%d => Key:%c\n", key, Keytable[index]);
-*     return 0;
-* }
-* 
-* int main() {
-*     Keypad keypad(p25, p26, p27, p28, p21, p22, p23, p24);
-*     keypad.CallAfterInput(&cbAfterInput);
-*     keypad.Start();
-* 
-*     while (1) {
-*         wait_ms(100);
-*     }
-* }
-* @endcode
-*/
-class Keypad {
-public:
-    /** Create a Keypad interface
-     *
-     *  @param row<3..0>     Row data lines
-     *  @param col<3..0>     Column data lines
-     *  @param debounce_ms   Debounce in ms (Default to 20ms)
-     */
-    Keypad(PinName row3, PinName row2, PinName row1, PinName row0,
-           PinName col3, PinName col2, PinName col1, PinName col0,
-           int debounce_ms = 20);
-
-    /** Start the keypad interrupt routines
-     */
-    void Start(void);
-
-    /** Stop the keypad interrupt routines
-     */
-    void Stop(void);
-
-    /** User-defined function that to be called when a key is pressed
-     *  @param fptr           A function pointer takes a uint32_t and
-     *                        returns uint32_t
-     */
-    void CallAfterInput(uint32_t (*fptr)(uint32_t));
-
-protected:
-    InterruptIn      _row0;
-    InterruptIn      _row1;
-    InterruptIn      _row2;
-    InterruptIn      _row3;
-    BusOut           _cols;
-    int              _debounce;
-    FPointer         _input; // Called after each input
-
-    void _callback(int row, InterruptIn &therow);
-    void _cbRow0Rise(void);
-    void _cbRow1Rise(void);
-    void _cbRow2Rise(void);
-    void _cbRow3Rise(void);
-    void _setupRiseTrigger(void);
-    void _dummy(void) { };
-};
-
-#endif // KEYPAD_H
\ No newline at end of file

--- a/main.cpp	Mon Jan 30 09:40:01 2012 +0000
+++ b/main.cpp	Wed Jan 01 17:47:52 2014 +0000
@@ -1,53 +1,40 @@
 #include "mbed.h"
-#include "keypad.h"
 
-#define       KEYLEN    4
-#define       ENDKEY   15
-char          Buffer[KEYLEN];
-int           Index = 0;
+#include "Keypad.h"
+
+Serial        PC(USBTX, USBRX);
 
 // Define your own keypad values
-char Keytable[] = { '1', '2', '3', 'A',
-                    '4', '5', '6', 'B',
-                    '7', '8', '9', 'C',
-                    '*', '0', '#', 'D'
+char Keytable[] = { '1', '2', '3',   // r0
+                    '4', '5', '6',   // r1
+                    '7', '8', '9',   // r2
+                  // c0   c1   c2
                   };
 
-uint32_t cbAfterInput(uint32_t key) {
-    bool      finish = false;
-    
-    printf("Index:%d => Key:%c\n", Index, Keytable[key]);
+int32_t       Index = -1;
+int           State;
 
-    if (Index < KEYLEN - 1)
-    {
-        if (key != ENDKEY)  // Terminating key
-            Buffer[Index] = Keytable[key];
-        else // Terminating key is entered
-            finish = true;
-        Index++;
-    }
-
-    if (finish || (Index == KEYLEN - 1)) {
-        printf("Complete string = %s\n", Buffer);
-        memset(&Buffer, 0, KEYLEN);
-        Index = 0;
-    }
-
+uint32_t cbAfterInput(uint32_t index)
+{
+    Index = index;
     return 0;
 }
 
-void Sleep(void) {
-    __WFI();
-}
+int main()
+{
+    PC.printf("I am Demo Keypad\r\n");
+    
+    //             r0   r1   r2   r3   c0   c1   c2   c3
+    Keypad keypad(p21, p22,  NC,  NC, p23, p24,  NC,  NC);
+    keypad.attach(&cbAfterInput);
+    keypad.start();  // energize the columns c0-c3 of the keypad
 
-int main() {
-    memset(&Buffer, 0, KEYLEN);
-    Index = 0;
-    Keypad keypad(p25, p26, p27, p28, p21, p22, p23, p24);
-    keypad.CallAfterInput(&cbAfterInput);
-
-    keypad.Start();
     while (1) {
-        Sleep();
+        __wfi();
+        if (Index > -1) {
+            PC.printf("Interrupted");
+            PC.printf("Index:%d => Key:%c\r\n", Index, Keytable[Index]);
+            Index = -1;
+        }
     }
-}
\ No newline at end of file
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Jan 01 17:47:52 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/b4b9f287a47e
\ No newline at end of file

--- a/mbed.lib	Mon Jan 30 09:40:01 2012 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-http://mbed.org/projects/libraries/svn/mbed/trunk@38
\ No newline at end of file