Guillaume Lefrant / Mbed 2 deprecated gtvl2_a3 Featured

This program is an advanced "IoT" thermometer using LM75B component library. It displays the current value to the Serial host in Celcius or Fahrenheit (possible to change using a switch). It also stores an historic and displays it to the user using the LCD screen. Moreover, you can change the orientation of the screen by turning the device, just like a smartphone.

Dependencies:   C12832 FXOS8700CQ LM75B mbed

main.cpp@0:362773c24009, 2016-02-09 (annotated)

Committer:
co838_gtvl2
Date:
Tue Feb 09 18:27:08 2016 +0000
Revision:
0:362773c24009
Child:
1:06713d1b69cf
Working version with Thermal sensor, report to USB Serial Host, change unit (C to F) from SW2 and visualisation on the top RGB LED.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
co838_gtvl2 0:362773c24009 1 #include "mbed.h"
co838_gtvl2 0:362773c24009 2 #include "LM75B.h"
co838_gtvl2 0:362773c24009 3
co838_gtvl2 0:362773c24009 4 // #undef _DEBUG
co838_gtvl2 0:362773c24009 5 #define _DEBUG
co838_gtvl2 0:362773c24009 6
co838_gtvl2 0:362773c24009 7 Serial host(USBTX, USBRX);
co838_gtvl2 0:362773c24009 8 LM75B lm_temp(D14, D15);
co838_gtvl2 0:362773c24009 9 InterruptIn sw2_int (SW2);
co838_gtvl2 0:362773c24009 10 Ticker rgb_tick;
co838_gtvl2 0:362773c24009 11 DigitalOut r_led (PTA2);
co838_gtvl2 0:362773c24009 12 DigitalOut g_led (PTC4);
co838_gtvl2 0:362773c24009 13 DigitalOut b_led (PTA0); // Won't use it because not working on my Shield !
co838_gtvl2 0:362773c24009 14
co838_gtvl2 0:362773c24009 15 volatile bool celcius = true;
co838_gtvl2 0:362773c24009 16
co838_gtvl2 0:362773c24009 17 void rgb_handler() {
co838_gtvl2 0:362773c24009 18 if (celcius) {
co838_gtvl2 0:362773c24009 19 r_led = 1.0;
co838_gtvl2 0:362773c24009 20 g_led = 0.0;
co838_gtvl2 0:362773c24009 21 } else {
co838_gtvl2 0:362773c24009 22 r_led = 0.0;
co838_gtvl2 0:362773c24009 23 g_led = 1.0;
co838_gtvl2 0:362773c24009 24 }
co838_gtvl2 0:362773c24009 25 }
co838_gtvl2 0:362773c24009 26
co838_gtvl2 0:362773c24009 27 void sw_interrupt (void) {
co838_gtvl2 0:362773c24009 28 celcius = !celcius;
co838_gtvl2 0:362773c24009 29 }
co838_gtvl2 0:362773c24009 30
co838_gtvl2 0:362773c24009 31 int main(void) {
co838_gtvl2 0:362773c24009 32 host.baud(38400);
co838_gtvl2 0:362773c24009 33 host.printf("Hello LeNiglo, from FRDM-K64F!\r\n");
co838_gtvl2 0:362773c24009 34
co838_gtvl2 0:362773c24009 35 r_led = 0.0;
co838_gtvl2 0:362773c24009 36 g_led = 0.0;
co838_gtvl2 0:362773c24009 37 b_led = 1.0;
co838_gtvl2 0:362773c24009 38
co838_gtvl2 0:362773c24009 39 rgb_tick.attach(&rgb_handler, 0.001);
co838_gtvl2 0:362773c24009 40 sw2_int.mode(PullUp);
co838_gtvl2 0:362773c24009 41 sw2_int.fall(&sw_interrupt);
co838_gtvl2 0:362773c24009 42
co838_gtvl2 0:362773c24009 43 /* forever.. */
co838_gtvl2 0:362773c24009 44 while (true) {
co838_gtvl2 0:362773c24009 45 float temperature = lm_temp.read();
co838_gtvl2 0:362773c24009 46
co838_gtvl2 0:362773c24009 47 #if defined _DEBUG
co838_gtvl2 0:362773c24009 48 if (celcius) {
co838_gtvl2 0:362773c24009 49 host.printf("Temp: %.2f deg Celcius.\r\n", temperature);
co838_gtvl2 0:362773c24009 50 } else {
co838_gtvl2 0:362773c24009 51 host.printf("Temp: %.2f deg Fahrenheit.\r\n", (temperature * 1.80 + 32.00));
co838_gtvl2 0:362773c24009 52 }
co838_gtvl2 0:362773c24009 53 #endif
co838_gtvl2 0:362773c24009 54 wait_ms(3000);
co838_gtvl2 0:362773c24009 55 }
co838_gtvl2 0:362773c24009 56 }