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@4:5bf99eb2d740, 2016-02-10 (annotated)

Committer:
co838_gtvl2
Date:
Wed Feb 10 16:48:55 2016 +0000
Revision:
4:5bf99eb2d740
Parent:
3:a4dac093a968
Child:
5:c5d7fca4d111
WOW !; Speed of display x100 and ability to reverse screen using accelerometer !

Who changed what in which revision?

UserRevisionLine numberNew contents of line
co838_gtvl2 4:5bf99eb2d740 1 /**
co838_gtvl2 4:5bf99eb2d740 2 * This program is an advanced "IoT" thermometer using LM75B component library.
co838_gtvl2 4:5bf99eb2d740 3 * It displays the current value to the Serial host in Celcius or Fahrenheit (possible to change using a switch).
co838_gtvl2 4:5bf99eb2d740 4 * It also stores an historic and displays it to the user using the LCD screen.
co838_gtvl2 4:5bf99eb2d740 5 * Moreover, you can change the orientation of the screen by turning the device (just like a smartphone)
co838_gtvl2 4:5bf99eb2d740 6 *
co838_gtvl2 4:5bf99eb2d740 7 * Created by Guillaume Lefrant gtvl2
co838_gtvl2 4:5bf99eb2d740 8 **/
co838_gtvl2 4:5bf99eb2d740 9
co838_gtvl2 1:06713d1b69cf 10 #include "main.h"
co838_gtvl2 1:06713d1b69cf 11 #include "ThermalDisplayer.h"
co838_gtvl2 0:362773c24009 12
co838_gtvl2 1:06713d1b69cf 13 Serial host(USBTX, USBRX); // Serial Host
co838_gtvl2 1:06713d1b69cf 14 LM75B lm_temp(D14, D15); // Thermal Sensor
co838_gtvl2 1:06713d1b69cf 15 InterruptIn sw2_int(SW2); // SW2
co838_gtvl2 4:5bf99eb2d740 16 DigitalOut tilt_led(LED1); // Red LED
co838_gtvl2 1:06713d1b69cf 17 DigitalOut r_led(PTA2); // RGB LED
co838_gtvl2 1:06713d1b69cf 18 DigitalOut g_led(PTC4);
co838_gtvl2 4:5bf99eb2d740 19 DigitalOut b_led(PTC12);
co838_gtvl2 1:06713d1b69cf 20 AnalogIn pot(A0); // Potentiometer POT1
co838_gtvl2 0:362773c24009 21
co838_gtvl2 1:06713d1b69cf 22 Ticker rgb_tick; // Ticker for RGB LED control
co838_gtvl2 1:06713d1b69cf 23 volatile bool celcius = true; // Global boolean for unit Celcius / Fahrenheit
co838_gtvl2 0:362773c24009 24
co838_gtvl2 1:06713d1b69cf 25 /*
co838_gtvl2 1:06713d1b69cf 26 * RGB LED control
co838_gtvl2 1:06713d1b69cf 27 */
co838_gtvl2 2:5d0c209e5c61 28 void rgb_handler()
co838_gtvl2 2:5d0c209e5c61 29 {
co838_gtvl2 0:362773c24009 30 if (celcius) {
co838_gtvl2 0:362773c24009 31 r_led = 1.0;
co838_gtvl2 4:5bf99eb2d740 32 g_led = 1.0;
co838_gtvl2 4:5bf99eb2d740 33 b_led = 0.0;
co838_gtvl2 0:362773c24009 34 } else {
co838_gtvl2 0:362773c24009 35 r_led = 0.0;
co838_gtvl2 0:362773c24009 36 g_led = 1.0;
co838_gtvl2 4:5bf99eb2d740 37 b_led = 1.0;
co838_gtvl2 2:5d0c209e5c61 38 }
co838_gtvl2 0:362773c24009 39 }
co838_gtvl2 0:362773c24009 40
co838_gtvl2 1:06713d1b69cf 41 /*
co838_gtvl2 1:06713d1b69cf 42 * SW2 handler
co838_gtvl2 1:06713d1b69cf 43 */
co838_gtvl2 2:5d0c209e5c61 44 void sw_handler (void)
co838_gtvl2 2:5d0c209e5c61 45 {
co838_gtvl2 0:362773c24009 46 celcius = !celcius;
co838_gtvl2 0:362773c24009 47 }
co838_gtvl2 0:362773c24009 48
co838_gtvl2 2:5d0c209e5c61 49 int main(void)
co838_gtvl2 2:5d0c209e5c61 50 {
co838_gtvl2 0:362773c24009 51 host.baud(38400);
co838_gtvl2 3:a4dac093a968 52 host.printf("Hello gtvl2, from FRDM-K64F!\r\nUse POT1 to change the refresh rate, POT2 to change the scale of the graphic and SW2 to change the unit.\r\n");
co838_gtvl2 2:5d0c209e5c61 53
co838_gtvl2 4:5bf99eb2d740 54 tilt_led = 0.0;
co838_gtvl2 4:5bf99eb2d740 55 r_led = 1.0;
co838_gtvl2 0:362773c24009 56 g_led = 0.0;
co838_gtvl2 2:5d0c209e5c61 57 b_led = 1.0;
co838_gtvl2 2:5d0c209e5c61 58
co838_gtvl2 1:06713d1b69cf 59 int refresh_time = 3000;
co838_gtvl2 2:5d0c209e5c61 60
co838_gtvl2 1:06713d1b69cf 61 /*
co838_gtvl2 1:06713d1b69cf 62 * Thermal unit control
co838_gtvl2 1:06713d1b69cf 63 */
co838_gtvl2 2:5d0c209e5c61 64 ThermalDisplayer *temp_display = new ThermalDisplayer();
co838_gtvl2 1:06713d1b69cf 65 rgb_tick.attach(&rgb_handler, 0.001);
co838_gtvl2 0:362773c24009 66 sw2_int.mode(PullUp);
co838_gtvl2 2:5d0c209e5c61 67 sw2_int.fall(&sw_handler);
co838_gtvl2 2:5d0c209e5c61 68
co838_gtvl2 2:5d0c209e5c61 69 while (true) {
co838_gtvl2 4:5bf99eb2d740 70 tilt_led = 0.0;
co838_gtvl2 1:06713d1b69cf 71 /*
co838_gtvl2 1:06713d1b69cf 72 * Get temperature using LM75B
co838_gtvl2 1:06713d1b69cf 73 * and display it to LCD screen
co838_gtvl2 1:06713d1b69cf 74 */
co838_gtvl2 0:362773c24009 75 float temperature = lm_temp.read();
co838_gtvl2 1:06713d1b69cf 76 temp_display->addTemp(temperature);
co838_gtvl2 4:5bf99eb2d740 77 temp_display->adjustScale(host);
co838_gtvl2 1:06713d1b69cf 78 temp_display->display();
co838_gtvl2 2:5d0c209e5c61 79
co838_gtvl2 2:5d0c209e5c61 80 /*
co838_gtvl2 2:5d0c209e5c61 81 * Display value to host according to unit choosed with SW2.
co838_gtvl2 2:5d0c209e5c61 82 * Could have been a ternary, but it's easier to read like this
co838_gtvl2 1:06713d1b69cf 83 */
co838_gtvl2 0:362773c24009 84 if (celcius) {
co838_gtvl2 0:362773c24009 85 host.printf("Temp: %.2f deg Celcius.\r\n", temperature);
co838_gtvl2 0:362773c24009 86 } else {
co838_gtvl2 4:5bf99eb2d740 87 host.printf("Temp: %.2f deg Fahrenheit.\r\n", (temperature * 1.8f + 32.0f));
co838_gtvl2 0:362773c24009 88 }
co838_gtvl2 2:5d0c209e5c61 89
co838_gtvl2 1:06713d1b69cf 90 /*
co838_gtvl2 2:5d0c209e5c61 91 * Change refresh_time according to POT1's value
co838_gtvl2 1:06713d1b69cf 92 */
co838_gtvl2 4:5bf99eb2d740 93 tilt_led = 1.0;
co838_gtvl2 3:a4dac093a968 94 refresh_time = (int) (MIN_REFRESH_TIME + ((1.0f - pot) * (MAX_REFRESH_TIME - MIN_REFRESH_TIME)));
co838_gtvl2 1:06713d1b69cf 95 wait_ms(refresh_time);
co838_gtvl2 0:362773c24009 96 }
co838_gtvl2 0:362773c24009 97 }