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Records temperature using TMP36GZ and outputs to HD44780 LCD screen (using tick interrupt routine). Alterable trip level that turns on/off LED with hysteresis. For ST Nucleo F401RE.
Dependencies: RepeatButton TMP36 GZ TextLCD mbed
Fork of Thermostat_Nucleo by
Diff: main.cpp
- Revision:
- 0:f5fbeaf3592c
- Child:
- 1:9bf30974727c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Wed Feb 26 13:33:47 2014 +0000 @@ -0,0 +1,70 @@ +#include "mbed.h" +#include "TextLCD.h" +#include "TMP36GZ.h" +#include "RepeatButton.h" +//#include "InterruptManager.h" +//#include <cstdlib> + +using namespace std; +#define REPEAT_DELAY 500 +#define REPEAT_PERIOD 100 +#define KEY_UP 2 +#define KEY_DOWN 4 + +Ticker tick; +TextLCD lcd(PC_10, PC_12, PA_13, PA_14, PA_15, PB_7); // rs, e, d4-d7 +TMP36GZ temp(PA_0); +DigitalOut led(LED1); + +KeyBuffer TheKeyBuffer(32); +RepeatButton butUp(PB_4, REPEAT_DELAY, REPEAT_PERIOD, &TheKeyBuffer, KEY_UP); +RepeatButton butDown(PB_3, REPEAT_DELAY, REPEAT_PERIOD, &TheKeyBuffer, KEY_DOWN); + +float d, level; + +void disp() +{ + lcd.locate(0, 0); + lcd.printf("%3.1f %cC", d, 223); + lcd.locate(0, 1); + lcd.printf("Trip %3.1f", level); +} + +int main() +{ + level = 21.0; //Trip level is at %f initially + float leveloff; + int value; + + tick.attach(&disp, 0.5); // setup ticker to call flip after # seconds + + while(1) + { + d = temp.sample(); //Define d and f as temp celsius and fahrenheit + leveloff = (level - 2); + + for(value = TheKeyBuffer.Read(); value != -1; value = TheKeyBuffer.Read()) //Button 1 and Button 3 increase and decrease trip level + { + switch(value) + { + case KEY_UP: + level += 0.1; + break; + + case KEY_DOWN: + level -= 0.1; + break; + } + } + + if(d >= level) + { + led = 1; + } + else if(d <= leveloff) + { + led = 0; + } + + } +}