Casey Lively / Mbed 2 deprecated Graduated_Nightlight_Seed_light_sensor

Lights up to 4 LEDs based on ambient light levels. Uses Grove Seeed Light Sensor

Dependencies:   mbed

Fork of Seeed_Grove_Shield_Light_Sensor by Seeed

main.cpp@3:15c1934a8316, 2016-03-16 (annotated)

Committer:
clively6
Date:
Wed Mar 16 17:38:22 2016 +0000
Revision:
3:15c1934a8316
Parent:
2:76004e9cf0cc 
test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 0:5ff78d2c85d1 1
clively6 3:15c1934a8316 2 /*Graduated Night light with Seed Grove Ambient Light sensor
clively6 3:15c1934a8316 3 Casey Lively
clively6 3:15c1934a8316 4 March 2016*/
clively6 3:15c1934a8316 5
clively6 3:15c1934a8316 6 //Read in ambient light sensor with mbed LPC1768
screamer 0:5ff78d2c85d1 7 #include "mbed.h"
screamer 0:5ff78d2c85d1 8
clively6 3:15c1934a8316 9 AnalogIn sensor(p20);//
clively6 3:15c1934a8316 10 DigitalOut led1(LED1);
clively6 3:15c1934a8316 11 DigitalOut led2(LED2);
clively6 3:15c1934a8316 12 DigitalOut led3(LED3);
clively6 3:15c1934a8316 13 DigitalOut led4(LED4);
screamer 0:5ff78d2c85d1 14
screamer 0:5ff78d2c85d1 15 int main() {
screamer 1:d10e08a99894 16 float val;
clively6 3:15c1934a8316 17 float threshold = .03; //User specified for night-light mode. Set to .03 for light measurement mode
screamer 0:5ff78d2c85d1 18 while(1) {
screamer 1:d10e08a99894 19 val = sensor.read();
sam_grove 2:76004e9cf0cc 20 printf("Sensor reading: %2.2f - %2.2f\r\n", val, (float)(1023-val)*10/val);
clively6 3:15c1934a8316 21
clively6 3:15c1934a8316 22 if(val <= threshold)
clively6 3:15c1934a8316 23 led4 = 1;
clively6 3:15c1934a8316 24 else
clively6 3:15c1934a8316 25 led4 = 0;
clively6 3:15c1934a8316 26
clively6 3:15c1934a8316 27 if(val <= 0.1)
clively6 3:15c1934a8316 28 led3 = 1;
clively6 3:15c1934a8316 29 else
clively6 3:15c1934a8316 30 led3 = 0;
clively6 3:15c1934a8316 31
clively6 3:15c1934a8316 32 if(val <= 0.35)
clively6 3:15c1934a8316 33 led2 = 1;
clively6 3:15c1934a8316 34 else
clively6 3:15c1934a8316 35 led2 = 0;
clively6 3:15c1934a8316 36
clively6 3:15c1934a8316 37 if(val <= 0.55)
clively6 3:15c1934a8316 38 led1 = 1;
clively6 3:15c1934a8316 39 else
clively6 3:15c1934a8316 40 led1 = 0;
clively6 3:15c1934a8316 41
clively6 3:15c1934a8316 42
clively6 3:15c1934a8316 43 wait(0.1);
clively6 3:15c1934a8316 44 }//end while(1)
clively6 3:15c1934a8316 45 }//end Main