Thermostat Click

 1    // Main program
 2   void main() 
 3   {
 4    
 5    // MAX7502 temperature controller IC
 6 
 7    // MAX7502 Initialization
 8    TEMP = 0;                  // Thermostat function disabled - Output Relay disconnected
 9    TRES = 0;                  // Apply Reset procedure
10    delay_ms(150);
11    TRES = 1;                  // Temperature controller is in default state and ready for work
12 
13    // MAX7502 Configuration
14    Set_CONFIG(0);             // Set parameters in configuration register
15                               // refer to MAX7502 datasheet and click board schematic in order to
16                               // set right parameters for intended application:
17                               // e.g. set OS output pin polarity for using the chip sensor in
18                               // processes of Heating (bit1=0) or Cooling (bit1=1)
19                               // or set the output function of the same pin to be Comparator (bit2=0)
20                               // or Interrupt logic (bit2=1) in order to use the sensor for hysterezis
21                               // temp ON/OFF control (real process) or trivial ON/OFF control
22                               // In this example the chip is configured for heating
23    Set_TEMP_REF(REF_TEMP);    // Set referent temperature T = 22 C (Output relay is ON until the environment
24                               // temperature has reach that value)
25    Set_TEMP_HYST(HYST_TEMP);  // Output Relay is OFF until the temperature falls below HYST value
26 
27    TEMP = 1;                  // Thermostat enabled - Output Relay connected to OS output pin of MAX7502
28    
29    
30 
31    current_temp = REF_TEMP;
32    old_MSB = 0;
33    temp_MSB = 0;
34    temp_changed = false;
35 
36    
37    // Temperature read loop  -  temperature controlling process
38    while (1) 
39    {
40          Temp_read();         // Read 9-bit temperature value from MAX7502's register space
41          delay_ms(200);       // +-0.5 C fraction neglected in this example
42    }
43    
44 }