main.cpp

00001 #include "mbed.h"
00002 //Solenoid Hello World
00003 DigitalOut myled(LED1);
00004 //Non blocking with auto off delay using timer interrupt setup by class
00005 class Solenoid
00006 {
00007 public:
00008     Solenoid (PinName pin, float delay=0.5);
00009     void write(bool state);
00010     Solenoid& operator= (bool value);
00011  
00012 private:
00013     void Solenoid_Off_Int();
00014     DigitalOut _pin;
00015     Timeout tint;
00016     float ontime;
00017 };
00018 Solenoid::Solenoid(PinName pin, float delay) : _pin(pin), ontime(delay)
00019 {
00020     _pin=0;
00021 }
00022 void Solenoid::Solenoid_Off_Int()
00023 {
00024     _pin=0;//timer interrupt routine to auto turn off solenoid
00025 }
00026 void Solenoid::write(bool value)
00027 {
00028     _pin = value;
00029     if (value!=0) //do auto off with timer interrupt
00030         tint.attach(this,&Solenoid::Solenoid_Off_Int,ontime);//setup a timer interrupt
00031 }
00032 Solenoid& Solenoid::operator= (bool value)
00033 {
00034     write(value);
00035     return *this;
00036 }
00037  
00038 Solenoid mySolenoid(p21);
00039 int main()
00040 {
00041     while(1) {
00042         mySolenoid = 1; //ON with timer auto off
00043         myled = 1;
00044         wait(.5); //just for LEDs - solenoid turns off with timer interrupt
00045         myled = 0;
00046         wait(2.0);
00047     }
00048 }