Roman Valencia / Mbed 2 deprecated input_change

reading only one interrupt when it changes its value

Dependencies:   Hotboards_switches mbed

main.cpp@0:e4efa77cbd55, 2016-03-02 (annotated)

Committer:
RomanValenciaP
Date:
Wed Mar 02 20:34:27 2016 +0000
Revision:
0:e4efa77cbd55
Child:
1:af16896c2662
first release - recquires approval

Who changed what in which revision?

UserRevisionLine numberNew contents of line
RomanValenciaP 0:e4efa77cbd55 1
RomanValenciaP 0:e4efa77cbd55 2 /*
RomanValenciaP 0:e4efa77cbd55 3 * Reads an input on pin PB_4, only when its value has been changed
RomanValenciaP 0:e4efa77cbd55 4 */
RomanValenciaP 0:e4efa77cbd55 5
RomanValenciaP 0:e4efa77cbd55 6 #include "mbed.h"
RomanValenciaP 0:e4efa77cbd55 7 #include "Hotboards_switches.h"
RomanValenciaP 0:e4efa77cbd55 8
RomanValenciaP 0:e4efa77cbd55 9 // Creates a single sw object, this interrupt will give us a LOW(0) value when close
RomanValenciaP 0:e4efa77cbd55 10 // because our dip switch works with pull-ups
RomanValenciaP 0:e4efa77cbd55 11 Hotboards_switches sw( PB_4 );
RomanValenciaP 0:e4efa77cbd55 12 // If your dip switch will gave you a HIGH(1) value when close, then we need to create
RomanValenciaP 0:e4efa77cbd55 13 // the sw object with an extra parameter: Hotboards_switches sw( PB_4 , 1 );
RomanValenciaP 0:e4efa77cbd55 14 // In any case the function will return a HIGH(1) value any time the sw is closed
RomanValenciaP 0:e4efa77cbd55 15
RomanValenciaP 0:e4efa77cbd55 16 // For this example we will use the USB serial port, here we initialize it
RomanValenciaP 0:e4efa77cbd55 17 Serial pc(USBTX,USBRX);
RomanValenciaP 0:e4efa77cbd55 18
RomanValenciaP 0:e4efa77cbd55 19 int main()
RomanValenciaP 0:e4efa77cbd55 20 {
RomanValenciaP 0:e4efa77cbd55 21 while(1)
RomanValenciaP 0:e4efa77cbd55 22 {
RomanValenciaP 0:e4efa77cbd55 23 //Asks when the interrupt changes its value
RomanValenciaP 0:e4efa77cbd55 24 if( sw.hasItChange( ) )
RomanValenciaP 0:e4efa77cbd55 25 {
RomanValenciaP 0:e4efa77cbd55 26 // When the interrupt is close (or ON) the function will return a true value
RomanValenciaP 0:e4efa77cbd55 27 // it doesn´t matter if our input is configured with pull-ups(LOW) or
RomanValenciaP 0:e4efa77cbd55 28 // pull-downs(HIGH)
RomanValenciaP 0:e4efa77cbd55 29 if( sw.read( ) )
RomanValenciaP 0:e4efa77cbd55 30 {
RomanValenciaP 0:e4efa77cbd55 31 pc.printf( "sw = close (on)\n\r" );
RomanValenciaP 0:e4efa77cbd55 32 }
RomanValenciaP 0:e4efa77cbd55 33 else
RomanValenciaP 0:e4efa77cbd55 34 {
RomanValenciaP 0:e4efa77cbd55 35 pc.printf( "sw = open (off)\n\r" );
RomanValenciaP 0:e4efa77cbd55 36 }
RomanValenciaP 0:e4efa77cbd55 37 // Wait 250 ms, just to not query so often
RomanValenciaP 0:e4efa77cbd55 38 wait_ms( 250 );
RomanValenciaP 0:e4efa77cbd55 39 }
RomanValenciaP 0:e4efa77cbd55 40 }
RomanValenciaP 0:e4efa77cbd55 41 }