Joe Chacon / Mbed 2 deprecated JC-Ambient-HW2_1

Test Demo for Ambient Light Sensor

Dependencies:   SLCD mbed

main.cpp@0:75c2c5adf52a, 2016-01-27 (annotated)

Committer:
ceojoe1
Date:
Wed Jan 27 02:15:00 2016 +0000
Revision:
0:75c2c5adf52a
Ambient Light Sensor Demo;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ceojoe1 0:75c2c5adf52a 1 #include "mbed.h"
ceojoe1 0:75c2c5adf52a 2 #include "SLCD.h"
ceojoe1 0:75c2c5adf52a 3
ceojoe1 0:75c2c5adf52a 4 #define PROGNAME "LightSense_K146z_PWM v1\n\r"
ceojoe1 0:75c2c5adf52a 5 #define DATATIME 400 //milliseconds
ceojoe1 0:75c2c5adf52a 6 #define LCDLEN 10
ceojoe1 0:75c2c5adf52a 7 #define LIGHTSENSORPORT PTE22
ceojoe1 0:75c2c5adf52a 8
ceojoe1 0:75c2c5adf52a 9 SLCD slcd; //define LCD display globally define
ceojoe1 0:75c2c5adf52a 10 Serial pc(USBTX, USBRX);
ceojoe1 0:75c2c5adf52a 11 Timer LEDTimer;
ceojoe1 0:75c2c5adf52a 12
ceojoe1 0:75c2c5adf52a 13 void LCDMess(char *lMess)
ceojoe1 0:75c2c5adf52a 14 {
ceojoe1 0:75c2c5adf52a 15 slcd.Home();
ceojoe1 0:75c2c5adf52a 16 slcd.clear();
ceojoe1 0:75c2c5adf52a 17 slcd.printf(lMess);
ceojoe1 0:75c2c5adf52a 18 }
ceojoe1 0:75c2c5adf52a 19
ceojoe1 0:75c2c5adf52a 20 int main()
ceojoe1 0:75c2c5adf52a 21 {
ceojoe1 0:75c2c5adf52a 22 PwmOut greenColor(LED_GREEN);
ceojoe1 0:75c2c5adf52a 23 PwmOut redColor(LED_RED);
ceojoe1 0:75c2c5adf52a 24 AnalogIn LightSensor(LIGHTSENSORPORT);
ceojoe1 0:75c2c5adf52a 25 float lightData;
ceojoe1 0:75c2c5adf52a 26 char lcdData[LCDLEN];
ceojoe1 0:75c2c5adf52a 27 float max;
ceojoe1 0:75c2c5adf52a 28 float min = 1.0;
ceojoe1 0:75c2c5adf52a 29 int timeToChangeDF = DATATIME;
ceojoe1 0:75c2c5adf52a 30 // set up tier for next step of Duty Factor timing
ceojoe1 0:75c2c5adf52a 31 LEDTimer.start();
ceojoe1 0:75c2c5adf52a 32 LEDTimer.reset();
ceojoe1 0:75c2c5adf52a 33 pc.printf(PROGNAME);
ceojoe1 0:75c2c5adf52a 34
ceojoe1 0:75c2c5adf52a 35 while (true) {
ceojoe1 0:75c2c5adf52a 36 if(LEDTimer.read_ms() > timeToChangeDF) { //check for timer
ceojoe1 0:75c2c5adf52a 37 lightData = (1.0 - LightSensor.read());
ceojoe1 0:75c2c5adf52a 38 /*
ceojoe1 0:75c2c5adf52a 39 * IF LIGHT DATA > MAX,
ceojoe1 0:75c2c5adf52a 40 MAX VALUE BECOMES THE CURRENT LIGHT DATA
ceojoe1 0:75c2c5adf52a 41 */
ceojoe1 0:75c2c5adf52a 42 if (lightData > max)
ceojoe1 0:75c2c5adf52a 43 {
ceojoe1 0:75c2c5adf52a 44 max = lightData;
ceojoe1 0:75c2c5adf52a 45 }
ceojoe1 0:75c2c5adf52a 46 if(lightData < min)
ceojoe1 0:75c2c5adf52a 47 {
ceojoe1 0:75c2c5adf52a 48 min = lightData;
ceojoe1 0:75c2c5adf52a 49 }
ceojoe1 0:75c2c5adf52a 50 pc.printf("MAX: %4.3f\r\n", max);
ceojoe1 0:75c2c5adf52a 51 pc.printf("MIN: %4.3f\r\n", min);
ceojoe1 0:75c2c5adf52a 52 greenColor.write(1.0 - lightData);
ceojoe1 0:75c2c5adf52a 53 redColor.write(1.0 - lightData);
ceojoe1 0:75c2c5adf52a 54 sprintf(lcdData, "%4.3f", lightData);
ceojoe1 0:75c2c5adf52a 55 LCDMess(lcdData);
ceojoe1 0:75c2c5adf52a 56 pc.printf("%4.3f\r\n", lightData);
ceojoe1 0:75c2c5adf52a 57 timeToChangeDF = DATATIME;
ceojoe1 0:75c2c5adf52a 58 LEDTimer.reset();
ceojoe1 0:75c2c5adf52a 59 }
ceojoe1 0:75c2c5adf52a 60 }
ceojoe1 0:75c2c5adf52a 61 }