Mustafa Yassin / Mbed 2 deprecated TemperatureBasedFanControl

Control fan speed by temperature sensor reading. Set point can be adjusted by buttons.

Dependencies:   mbed DebounceIn TextLCD DS1820

main.cpp@2:d301da531767, 2021-12-09 (annotated)

Committer:
mustafayassin
Date:
Thu Dec 09 02:18:09 2021 +0000
Revision:
2:d301da531767
Parent:
1:d6ceed323d25 
Used DS1820 temperature sensor.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mustafayassin 0:af20639f9907 1 #include "mbed.h"
mustafayassin 0:af20639f9907 2 #include "TextLCD.h"
mustafayassin 0:af20639f9907 3 #include "DebounceIn.h"
mustafayassin 1:d6ceed323d25 4 #include "DS1820.h"
mustafayassin 0:af20639f9907 5
mustafayassin 0:af20639f9907 6 /*
mustafayassin 0:af20639f9907 7 This basic example just shows how to read the ADC internal channels raw values.
mustafayassin 0:af20639f9907 8 Please look in the corresponding device reference manual for a complete
mustafayassin 0:af20639f9907 9 description of how to make a temperature sensor, VBat or Vref measurement.
mustafayassin 0:af20639f9907 10 */
mustafayassin 0:af20639f9907 11
mustafayassin 0:af20639f9907 12 // Temperature input
mustafayassin 1:d6ceed323d25 13 //AnalogIn adc_temp1(A0);
mustafayassin 0:af20639f9907 14 AnalogIn adc_temp2(A1);
mustafayassin 0:af20639f9907 15 AnalogIn adc_temp3(A2);
mustafayassin 0:af20639f9907 16
mustafayassin 0:af20639f9907 17 // Switch input
mustafayassin 0:af20639f9907 18 DebounceIn tempUp(A3);
mustafayassin 0:af20639f9907 19 DebounceIn tempDown(A4);
mustafayassin 0:af20639f9907 20 DebounceIn onOff(A5);
mustafayassin 0:af20639f9907 21
mustafayassin 0:af20639f9907 22 // LCD
mustafayassin 0:af20639f9907 23 TextLCD lcd(D0, D1, D2, D3, D4, D5); // rs, e, d4-d7
mustafayassin 0:af20639f9907 24
mustafayassin 0:af20639f9907 25 // LED
mustafayassin 0:af20639f9907 26 DigitalOut led(LED1);
mustafayassin 0:af20639f9907 27
mustafayassin 0:af20639f9907 28 // PWM
mustafayassin 0:af20639f9907 29 PwmOut fan(D12);
mustafayassin 0:af20639f9907 30
mustafayassin 1:d6ceed323d25 31 // Temp
mustafayassin 1:d6ceed323d25 32 DS1820 ds1820(A0);
mustafayassin 1:d6ceed323d25 33
mustafayassin 0:af20639f9907 34 uint8_t tempSetValue = 25; // degree
mustafayassin 0:af20639f9907 35 bool fanOn = false;
mustafayassin 0:af20639f9907 36 float fanDutyCycle = 0.0f;
mustafayassin 0:af20639f9907 37
mustafayassin 1:d6ceed323d25 38 uint8_t ds1820Counter = 0;
mustafayassin 1:d6ceed323d25 39 uint8_t temp1 = 0;
mustafayassin 1:d6ceed323d25 40
mustafayassin 0:af20639f9907 41 //const uint8_t PRESS_DURATION = 5;
mustafayassin 0:af20639f9907 42
mustafayassin 0:af20639f9907 43 int main()
mustafayassin 0:af20639f9907 44 {
mustafayassin 1:d6ceed323d25 45 // Configure pull-up
mustafayassin 0:af20639f9907 46 tempUp.mode(PullUp);
mustafayassin 0:af20639f9907 47 tempDown.mode(PullUp);
mustafayassin 0:af20639f9907 48 onOff.mode(PullUp);
mustafayassin 1:d6ceed323d25 49 // 100 ms debounce
mustafayassin 1:d6ceed323d25 50 tempUp.set_samples(100);
mustafayassin 1:d6ceed323d25 51 tempDown.set_samples(100);
mustafayassin 1:d6ceed323d25 52 onOff.set_samples(100);
mustafayassin 1:d6ceed323d25 53
mustafayassin 0:af20639f9907 54 fan.period(4.0f); // period
mustafayassin 0:af20639f9907 55 fan.write(fanDutyCycle); // duty cycle
mustafayassin 0:af20639f9907 56
mustafayassin 1:d6ceed323d25 57 if (ds1820.begin()) lcd.printf("DS1820 found!");
mustafayassin 1:d6ceed323d25 58 else lcd.printf("DS1820 not found");
mustafayassin 1:d6ceed323d25 59 wait(1.0);
mustafayassin 1:d6ceed323d25 60 lcd.cls();
mustafayassin 0:af20639f9907 61 // Loop
mustafayassin 0:af20639f9907 62 while(1) {
mustafayassin 1:d6ceed323d25 63 //uint8_t temp1 = static_cast<uint8_t>(adc_temp1.read()*3.3f*100.0f);
mustafayassin 1:d6ceed323d25 64
mustafayassin 1:d6ceed323d25 65 if (ds1820Counter == 0) ds1820.startConversion();
mustafayassin 1:d6ceed323d25 66 if(ds1820Counter++ == 50) {
mustafayassin 1:d6ceed323d25 67 float ds1820Temp = 0.0f;
mustafayassin 1:d6ceed323d25 68 if(ds1820.read(ds1820Temp) == 0) {
mustafayassin 1:d6ceed323d25 69 temp1 = static_cast<uint8_t>(ds1820Temp);
mustafayassin 1:d6ceed323d25 70 }
mustafayassin 1:d6ceed323d25 71 ds1820Counter = 0;
mustafayassin 1:d6ceed323d25 72 }
mustafayassin 1:d6ceed323d25 73
mustafayassin 1:d6ceed323d25 74 uint8_t temp2 = static_cast<uint8_t>(adc_temp2.read()*3.3f*100.0f);
mustafayassin 1:d6ceed323d25 75 uint8_t temp3 = static_cast<uint8_t>(adc_temp3.read()*3.3f*100.0f);
mustafayassin 1:d6ceed323d25 76
mustafayassin 1:d6ceed323d25 77 lcd.printf("T1=%02d, T2=%02d\n", temp1, temp2);
mustafayassin 1:d6ceed323d25 78 lcd.printf("T3=%02d, SP=%02d\n", temp3, tempSetValue);
mustafayassin 1:d6ceed323d25 79
mustafayassin 0:af20639f9907 80
mustafayassin 0:af20639f9907 81 if(tempUp == 0) tempSetValue++;
mustafayassin 0:af20639f9907 82 if(tempDown == 0) tempSetValue--;
mustafayassin 0:af20639f9907 83 if(onOff == 0) fanOn = !fanOn;
mustafayassin 0:af20639f9907 84 //if(temp1 > tempSetValue && fanOn) {
mustafayassin 0:af20639f9907 85 // fan.write(fanDutyCycle);
mustafayassin 0:af20639f9907 86 //} else {
mustafayassin 0:af20639f9907 87 // fan.write(0.0);
mustafayassin 0:af20639f9907 88 //}
mustafayassin 0:af20639f9907 89 led = !led;
mustafayassin 0:af20639f9907 90 wait(0.020);
mustafayassin 0:af20639f9907 91 }
mustafayassin 0:af20639f9907 92 }