Hotboards MX / Mbed 2 deprecated Hotboards_KeyPad_LoopCounter

Demonstrates the effect of debounce time

Dependencies:   Hotboards_keypad mbed

Fork of LoopCounter by Roman Valencia

main.cpp@1:0f32d584b715, 2016-03-10 (annotated)

Committer:
Hotboards
Date:
Thu Mar 10 22:50:46 2016 +0000
Revision:
1:0f32d584b715
Parent:
0:4b3d27b81086 
firs release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Hotboards 1:0f32d584b715 1 /* @file loopCounter
Hotboards 1:0f32d584b715 2 || @version 1.1
Hotboards 1:0f32d584b715 3 || @modified by Diego (http://hotboards.org)
Hotboards 1:0f32d584b715 4 || @author Alexander Brevig
Hotboards 1:0f32d584b715 5 || @contact alexanderbrevig@gmail.com
Hotboards 1:0f32d584b715 6 ||
Hotboards 1:0f32d584b715 7 || @description
Hotboards 1:0f32d584b715 8 || | Demonstrates the effect of debounce time, just change the
Hotboards 1:0f32d584b715 9 || | debounce time using the fucntion setDebounceTime
RomanValenciaP 0:4b3d27b81086 10
Hotboards 1:0f32d584b715 11 */
RomanValenciaP 0:4b3d27b81086 12 #include "mbed.h"
RomanValenciaP 0:4b3d27b81086 13 #include "Hotboards_keypad.h"
RomanValenciaP 0:4b3d27b81086 14
RomanValenciaP 0:4b3d27b81086 15 // Defines the keys array with it's respective number of rows & cols,
RomanValenciaP 0:4b3d27b81086 16 // and with the value of each key
RomanValenciaP 0:4b3d27b81086 17 char keys[ 4 ][ 4 ] =
RomanValenciaP 0:4b3d27b81086 18 {
RomanValenciaP 0:4b3d27b81086 19 { '1' , '2' , '3' , 'A' },
RomanValenciaP 0:4b3d27b81086 20 { '4' , '5' , '6' , 'B' },
RomanValenciaP 0:4b3d27b81086 21 { '7' , '8' , '9' , 'C' },
RomanValenciaP 0:4b3d27b81086 22 { '*' , '0' , '#' , 'D' }
RomanValenciaP 0:4b3d27b81086 23 };
RomanValenciaP 0:4b3d27b81086 24
RomanValenciaP 0:4b3d27b81086 25 // Defines the pins connected to the rows
RomanValenciaP 0:4b3d27b81086 26 DigitalInOut rowPins[ 4 ] = { PA_6 , PA_7 , PB_6 , PC_7 };
RomanValenciaP 0:4b3d27b81086 27 // Defines the pins connected to the cols
RomanValenciaP 0:4b3d27b81086 28 DigitalInOut colPins[ 4 ] = { PA_8 , PB_10 , PB_4 , PB_5 };
RomanValenciaP 0:4b3d27b81086 29
RomanValenciaP 0:4b3d27b81086 30 // Creates a new keyboard with the values entered before
RomanValenciaP 0:4b3d27b81086 31 Keypad kpd( makeKeymap( keys ) , rowPins , colPins , 4 , 4 );
RomanValenciaP 0:4b3d27b81086 32
RomanValenciaP 0:4b3d27b81086 33 // Configures the serial port
RomanValenciaP 0:4b3d27b81086 34 Serial pc( USBTX , USBRX );
RomanValenciaP 0:4b3d27b81086 35
RomanValenciaP 0:4b3d27b81086 36 //
RomanValenciaP 0:4b3d27b81086 37 int loopCount = 0;
RomanValenciaP 0:4b3d27b81086 38 int timer_t = 0;
RomanValenciaP 0:4b3d27b81086 39
RomanValenciaP 0:4b3d27b81086 40 // Configures a timer
RomanValenciaP 0:4b3d27b81086 41 Timer t;
RomanValenciaP 0:4b3d27b81086 42
RomanValenciaP 0:4b3d27b81086 43 int main()
RomanValenciaP 0:4b3d27b81086 44 {
RomanValenciaP 0:4b3d27b81086 45 // Starts the timer
RomanValenciaP 0:4b3d27b81086 46 t.start( );
RomanValenciaP 0:4b3d27b81086 47 pc.printf( "Press any key: ");
RomanValenciaP 0:4b3d27b81086 48
RomanValenciaP 0:4b3d27b81086 49
RomanValenciaP 0:4b3d27b81086 50 // Try playing with different debounceTime settings to see how it affects
RomanValenciaP 0:4b3d27b81086 51 // the number of times per second your loop will run. The library prevents
RomanValenciaP 0:4b3d27b81086 52 // setting it to anything below 1 millisecond.
RomanValenciaP 0:4b3d27b81086 53 kpd.setDebounceTime ( 100 ); // setDebouncetime( ms );
RomanValenciaP 0:4b3d27b81086 54 while(1)
RomanValenciaP 0:4b3d27b81086 55 {
RomanValenciaP 0:4b3d27b81086 56 // Poll the keypad to look for any activation
RomanValenciaP 0:4b3d27b81086 57 char key = kpd.getKey( );
RomanValenciaP 0:4b3d27b81086 58
RomanValenciaP 0:4b3d27b81086 59 // Reports the number of times through the loop in 1 second. This will give
RomanValenciaP 0:4b3d27b81086 60 // you a relative idea of just how much the debounceTime has changed the
RomanValenciaP 0:4b3d27b81086 61 // speed of your code. If you set a high debounceTime your loopCount will
RomanValenciaP 0:4b3d27b81086 62 // look good but your keypresses will start to feel sluggish.
RomanValenciaP 0:4b3d27b81086 63 if(( t.read_ms( ) - timer_t ) > 1000 )
RomanValenciaP 0:4b3d27b81086 64 {
RomanValenciaP 0:4b3d27b81086 65 pc.printf( "Your loop code ran " );
RomanValenciaP 0:4b3d27b81086 66 pc.printf( "%d" , loopCount );
RomanValenciaP 0:4b3d27b81086 67 pc.printf( " times over the last second" );
RomanValenciaP 0:4b3d27b81086 68 loopCount = 0;
RomanValenciaP 0:4b3d27b81086 69 pc.printf( "\n\r" );
RomanValenciaP 0:4b3d27b81086 70 timer_t = t.read_ms( );
RomanValenciaP 0:4b3d27b81086 71 }
RomanValenciaP 0:4b3d27b81086 72 loopCount ++;
RomanValenciaP 0:4b3d27b81086 73
RomanValenciaP 0:4b3d27b81086 74 // If any key was pressed
RomanValenciaP 0:4b3d27b81086 75 if( key )
RomanValenciaP 0:4b3d27b81086 76 {
RomanValenciaP 0:4b3d27b81086 77 // Display the key pressed on serial port
RomanValenciaP 0:4b3d27b81086 78 pc.printf( "%c" , key );
RomanValenciaP 0:4b3d27b81086 79 }
RomanValenciaP 0:4b3d27b81086 80 }
RomanValenciaP 0:4b3d27b81086 81 }