main.cpp

00001 /** Temperature program to output to ULCD
00002  *
00003  * @author Alan Lai & Nelson Diaz
00004  * The Georgia Institute of Technology 
00005  * ECE 4180 Embeded Systems
00006  * Professor Hamblen
00007  * 03/28/2014
00008  * 
00009  * @section LICENSE
00010  * ----------------------------------------------------------------------------
00011  * "THE BEER-WARE LICENSE" (Revision 42):
00012  * <alanhlai91@gmail.com> wrote this file. As long as you retain this notice you
00013  * can do whatever you want with this stuff. If we meet some day, and you think
00014  * this stuff is worth it, you can buy me a beer in return.
00015  * ----------------------------------------------------------------------------
00016  *
00017  *
00018  * @section DESCRIPTION
00019  *
00020  * Honeywell HTU21D Humidity and Temperature sensor.
00021  *
00022  * Datasheet, specs, and information:
00023  *
00024  * https://www.sparkfun.com/products/12064
00025  */
00026 
00027 
00028 #include "mbed.h"
00029 #include "uLCD_4DGL.h"
00030 #include "rtos.h"
00031 #include "HTU21D.h"
00032 
00033 
00034 Semaphore four_slots(1); //Activate semaphore
00035 
00036 uLCD_4DGL uLCD(p28,p27,p29); // serial tx, serial rx, reset pin;
00037 HTU21D temphumid(p9, p10); // Temp Module || sda, SCL
00038  
00039 void sample_humidity(void const *args) { //line 2
00040     while(true){
00041 
00042         four_slots.wait();
00043         uLCD.color(0x0000FF);
00044         uLCD.locate(1,2); //col,row
00045         wait(0.1);
00046         uLCD.printf("Humidy Is: %d %%", temphumid.sample_humid());
00047         four_slots.release();
00048         Thread::wait(250);
00049     }
00050 }
00051 
00052 
00053 void sample_temperature(void const *args) { // line 4
00054     while(true){
00055     four_slots.wait();
00056     uLCD.color(0xFF0000);
00057     uLCD.locate(1,4); //col,row
00058     wait(0.1);
00059     uLCD.printf("Temp Is: %d° C", temphumid.sample_ctemp());
00060     uLCD.color(0xFFFF00);
00061     uLCD.locate(1,6);
00062     wait(0.1);
00063     uLCD.printf("Temp Is: %d° F", temphumid.sample_ftemp());
00064     uLCD.color(0xC0C0C0);
00065     uLCD.locate(1,8);
00066     wait(0.1);
00067     uLCD.printf("Temp Is: %d° k", temphumid.sample_ktemp());
00068     four_slots.release();
00069     Thread::wait(1000);
00070     }
00071 }
00072 
00073  
00074 int main() {
00075     uLCD.baudrate(3000000);
00076     Thread t1(sample_humidity);
00077     Thread t2(sample_temperature);
00078     while(1){ //While so program doesn't end
00079         
00080         }
00081 }