Michael Knudson / Mbed 2 deprecated Thermostat

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Dependencies:   mbed mbed-rtos 4DGL-uLCD-SE

main.cpp@5:568a15151d11, 2020-04-13 (annotated)

Committer:
mknudson3
Date:
Mon Apr 13 15:00:47 2020 +0000
Revision:
5:568a15151d11
Parent:
1:c27c61c0a1e0
Child:
6:65bbd44cabd7
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:c27c61c0a1e0 1 #include "mbed.h"
emilmont 1:c27c61c0a1e0 2 #include "rtos.h"
mknudson3 5:568a15151d11 3 #include "uLCD_4DGL.h"
emilmont 1:c27c61c0a1e0 4
mknudson3 5:568a15151d11 5 #define DEBOUNCE_TIME 10 // 10 * 0.5 (main loop) = 5 seconds
mknudson3 5:568a15151d11 6
mknudson3 5:568a15151d11 7 uLCD_4DGL uLCD(p9,p10,p17); // serial tx, serial rx, reset pin;
emilmont 1:c27c61c0a1e0 8
mknudson3 5:568a15151d11 9 BusOut leds(LED1, LED2, LED3, LED4);
mknudson3 5:568a15151d11 10 DigitalOut relay(p21);
mknudson3 5:568a15151d11 11 AnalogIn tmp36(p19);
mknudson3 5:568a15151d11 12 AnalogIn pot(p20);
mknudson3 5:568a15151d11 13
mknudson3 5:568a15151d11 14 int currTemp, desiredTemp;
mknudson3 5:568a15151d11 15 bool isHeating;
mknudson3 5:568a15151d11 16
mknudson3 5:568a15151d11 17 // Helper function
mknudson3 5:568a15151d11 18 // convert tmp36 reading to degrees fahrenheit
mknudson3 5:568a15151d11 19 int tmp2f() {
mknudson3 5:568a15151d11 20 return (tmp36 * 3.3 - 0.5) * 180 + 32;
emilmont 1:c27c61c0a1e0 21 }
emilmont 1:c27c61c0a1e0 22
mknudson3 5:568a15151d11 23 void attemptToggle(Timer* timer, bool conditional) {
mknudson3 5:568a15151d11 24 if (!*timer) {
mknudson3 5:568a15151d11 25 timer->start();
mknudson3 5:568a15151d11 26 } else if (!conditional) {
mknudson3 5:568a15151d11 27 timer->stop();
mknudson3 5:568a15151d11 28 timer->reset();
mknudson3 5:568a15151d11 29 } else if (*timer >= DEBOUNCE_TIME) {
mknudson3 5:568a15151d11 30 timer->stop();
mknudson3 5:568a15151d11 31 timer->reset();
mknudson3 5:568a15151d11 32 isHeating = !isHeating;
mknudson3 5:568a15151d11 33 }
mknudson3 5:568a15151d11 34 }
mknudson3 5:568a15151d11 35
mknudson3 5:568a15151d11 36 int main() {
mknudson3 5:568a15151d11 37
mknudson3 5:568a15151d11 38 uLCD.printf("\nCurrent temp:\n\nDesired temp:");
mknudson3 5:568a15151d11 39
mknudson3 5:568a15151d11 40 bool shouldHeat = false;
mknudson3 5:568a15151d11 41 isHeating = false;
emilmont 1:c27c61c0a1e0 42
mknudson3 5:568a15151d11 43 Timer main, on, off;
mknudson3 5:568a15151d11 44 main.start();
mknudson3 5:568a15151d11 45 while(1) {
mknudson3 5:568a15151d11 46 if (main.read_ms() > 500) {
mknudson3 5:568a15151d11 47 main.reset();
mknudson3 5:568a15151d11 48 currTemp = tmp2f();
mknudson3 5:568a15151d11 49 desiredTemp = 90-pot.read()*35;
mknudson3 5:568a15151d11 50 shouldHeat = currTemp < desiredTemp;
emilmont 1:c27c61c0a1e0 51
mknudson3 5:568a15151d11 52 uLCD.locate(14, 1);
mknudson3 5:568a15151d11 53 uLCD.printf("%d", currTemp);
mknudson3 5:568a15151d11 54 uLCD.locate(14, 3);
mknudson3 5:568a15151d11 55 uLCD.printf("%d", desiredTemp);
mknudson3 5:568a15151d11 56
mknudson3 5:568a15151d11 57
mknudson3 5:568a15151d11 58 if (isHeating) attemptToggle(&off, !shouldHeat);
mknudson3 5:568a15151d11 59 if (!isHeating) attemptToggle(&on, shouldHeat);
mknudson3 5:568a15151d11 60
mknudson3 5:568a15151d11 61 leds = relay = isHeating;
mknudson3 5:568a15151d11 62 }
mknudson3 5:568a15151d11 63 }
emilmont 1:c27c61c0a1e0 64 }