jim hamblen / Mbed 2 deprecated LED_Railroad_Crossing

Demo of LED lighting effects using PWM and wait for time delays. Pins are setup for LPC1768 platform’s LEDs. For complete information, see http://developer.mbed.org/users/4180_1/notebook/led-lighting-effects-for-modelers/

Dependencies:   mbed

main.cpp

Committer:
4180_1
Date:
2014-11-28
Revision:
0:a903b3cf5317

File content as of revision 0:a903b3cf5317:

#include "mbed.h"
//LED Railroad Crossing Lighting Effect
PwmOut myled(LED1);
PwmOut myled2(LED4);
//Use a PWM output to enable dimming
//1.0 is full on, 0.0 off, 0.5 50% on

//function to simulate incandescent bulb warm up 
//and cool down cycles
void incandescent_bulb(PwmOut led, float on_time = 0.1, 
float warm_time = 0.2)
{
    //LED warm up effect using PWM
    for(int i=0; i<10; i++) {
        led = i/10.0;
        wait(warm_time/10.0);
    }
    //LED at full brightness level
    led = 1.0;
    wait(on_time);
    //LED cool down effect using PWM
    for(int i=9; i>0; i--) {
        led = i/10.0;
        wait(warm_time/10.0);
    }
    //LED off
    led = 0.0;
}

int main()
{
    while(1) {
        incandescent_bulb(myled);
        incandescent_bulb(myled2);
    }
}