main.cpp

00001 /* 
00002 
00003 2645_I2C_TMP102_Library
00004 
00005 Sample code from ELEC2645 Week 17 Lab
00006 
00007 Demonstrates how to re-factor the TMP102 code into a library
00008 
00009 (c) Craig A. Evans, University of Leeds, Feb 2016
00010 
00011 */ 
00012 
00013 #include "mbed.h"
00014 // include the library header, ensure the library has been imported into the project
00015 #include "TMP102.h"
00016 
00017 // Create TMP102 object
00018 TMP102 tmp102(I2C_SDA,I2C_SCL);  
00019 // UART connection for PC
00020 Serial pc(USBTX,USBRX);
00021 
00022 // K64F on-board LEDs 
00023 DigitalOut r_led(LED_RED);
00024 DigitalOut g_led(LED_GREEN);
00025 DigitalOut b_led(LED_BLUE);
00026 // K64F on-board switches
00027 InterruptIn sw2(SW2);
00028 InterruptIn sw3(SW3);
00029 
00030 // error function hangs flashing an LED
00031 void error();
00032 // setup serial port
00033 void init_serial();
00034 // set-up the on-board LEDs and switches
00035 void init_K64F();
00036 
00037 int main()
00038 {
00039     // initialise the board and serial port
00040     init_K64F();
00041     init_serial(); 
00042     // call the sensor init method using dot syntax
00043     tmp102.init();
00044     
00045     while (1) {
00046         
00047         // read temperature and print over serial port
00048         float T = tmp102.get_temperature();
00049         pc.printf("T = %f K\n",T);
00050         // small delay - 1s to match the update rate of the sensor (1 Hz)
00051         wait(1.0);
00052         
00053     }
00054 
00055 }
00056 
00057 void init_serial() {
00058     // set to highest baud - ensure terminal software matches
00059     pc.baud(115200); 
00060 }
00061 
00062 void init_K64F() 
00063 {
00064     // on-board LEDs are active-low, so set pin high to turn them off.
00065     r_led = 1;
00066     g_led = 1;
00067     b_led = 1;   
00068     
00069     // since the on-board switches have external pull-ups, we should disable the internal pull-down
00070     // resistors that are enabled by default using InterruptIn
00071     sw2.mode(PullNone);
00072     sw3.mode(PullNone);
00073 
00074 }