Page 223 - ARM Based Microcontroller Projects Using MBED

8.23 PROJECT 19—ON/OFF TEMPERATURE CONTROLLER 209
/*************************************************************************

ON/OFF TEMPERATURE CONTROLLER
=============================
This is an ON/OFF temperature controller program. The program reads the
desired set-point temperature from the keyboard. A temperature sensor, a
relay and heater are connected to the development board. If the measured
temperature is above the desired set-point then the heater is turned OFF.
If on the other hand the measured temperature is below the set-point
temperature then the heater is turned ON. The program displays both the
set-point and the measured temperatures on the PC screen.

Author: Dogan Ibrahim
Date : August 2018
File : ONOFF
**************************************************************************/
#include "mbed.h"
Serial MyPC(USBTX, USBRX);
AnalogIn ain(PA_0);
DigitalOut Relay(PC_0);

// Clear the screen
//
void clrscr()
{
char clrscr[] = {0x1B, '[', '2' , 'J',0};
MyPC.printf(clrscr);
}
//
// Home the cursor
//
void homescr()
{
char homescr[] = {0x1B, '[' , 'H' , 0};
MyPC.printf(homescr);
}
//
// Goto specified line and column
//
void gotoscr(int line, int column)
{
char scr[] = {0x1B, '[', 0x00, ';' ,0x00, 'H', 0};
scr[2] = line;
scr[4] = column;
MyPC.printf(scr);
}

int main()
{
FIG. 8.75 Program listing.
(Continued)