HM Yoong
Interrupt-driven keypad interface library. Compatible with RTOS. Able to handle various keypad size below 4x4.
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
diff -r 8209bcf62e0a -r 1ae4a77af85b FPointer.lib --- 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
diff -r 8209bcf62e0a -r 1ae4a77af85b keypad.lib --- /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
diff -r 8209bcf62e0a -r 1ae4a77af85b keypad/.lib --- 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
diff -r 8209bcf62e0a -r 1ae4a77af85b keypad/keypad.cpp
--- 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
diff -r 8209bcf62e0a -r 1ae4a77af85b keypad/keypad.h
--- 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
diff -r 8209bcf62e0a -r 1ae4a77af85b main.cpp
--- 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
+}
diff -r 8209bcf62e0a -r 1ae4a77af85b mbed.bld --- /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
diff -r 8209bcf62e0a -r 1ae4a77af85b mbed.lib --- 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