'--------------------------------------------------------------
' Thomas Jensen | uCtrl.net
'--------------------------------------------------------------
' file: AVR_FTU_v_2.0
' date: 15/03/2007
'--------------------------------------------------------------
$regfile = "M8def.dat"
$crystal = 1000000
Config Watchdog = 1024
Config Portb.0 = Output
Config Portb.1 = Output
Config Portb.2 = Output
Config Portb.3 = Input
Config Portb.4 = Input
Config Portb.5 = Input
Config Portb.6 = Input
Config Portb.7 = Input
Dim Lifesignal As Integer
Dim W As Word , Volt As Word , Temp As Word
Dim C_vifte1 As Byte , C_vifte2 As Byte , Set_fan As Byte
Dim C_alarm1 As Byte , C_alarm2 As Byte , Set_alarm As Byte
Dim Alarmled As Integer , Cls_timer As Integer , Alarm_timer As Integer
Dim Eeprom_save As Integer , Eeprom_fan As Eram Byte , Eeprom_alarm As Eram Byte
Dim Alarm_timer2 As Integer , Fan_speed As Byte , Temp_timer As Byte
Dim Fan_delay As Integer , Fan_delay2 As Integer
Dim Fan_timer As Integer , Fan_timer2 As Integer
 
Config Timer1 = Pwm , Pwm = 8 , Prescale = 1 , Compare A Pwm = Clear Up , Compare B Pwm = Clear Up
Ddrb.1 = 1
Ddrb.2 = 1
Pwm1a = 255
Pwm1b = 255
 
Config Lcdpin = Pin , Db4 = Portd.3 , Db5 = Portd.2 , Db6 = Portd.1 , Db7 = Portd.0 , E = Portd.6 , Rs = Portd.7
Config Lcd = 16 * 2
 
Config Adc = Single , Prescaler = Auto , Reference = Avcc
Start Adc
 
Lifesignal = 21
Alarmled = 0
Eeprom_save = 0
C_vifte1 = 0
C_vifte2 = 0
C_alarm1 = 0
C_alarm2 = 0
Cls_timer = 50
Alarm_timer = 0
Fan_speed = 0
Fan_delay = 0
Fan_timer = 0
Temp_timer = 10
 
'get eeprom values
Set_fan = Eeprom_fan
If Set_fan > 50 Or Set_fan < 10 Then Set_fan = 30
Set_alarm = Eeprom_alarm
If Set_alarm > 50 Or Set_alarm < 10 Then Set_alarm = 32
 
Cls
Cursor Off
Deflcdchar 1 , 32 , 32 , 32 , 7 , 4 , 6 , 4 , 7 'e-sign
Deflcdchar 2 , 32 , 32 , 32 , 32 , 32 , 32 , 32 , 32 'blank
 
'turn off alarm
Pwm1b = 0
 
Locate 1 , 1
Lcd "Fan & Temp Unit!"
Locate 2 , 5
Lcd "SW v.2.0"
Waitms 2000
Cls
Locate 1 , 1
Lcd "uCtrl.net"
Locate 2 , 1
Lcd "System start =)"
Waitms 2000
Cls
Locate 1 , 5
Lcd "F:"
Locate 1 , 11
Lcd "A:"
Locate 2 , 1
Lcd "Fan:"
Locate 1 , 1
Lcd "?C"
 
'turn off alarm
Pwm1b = 255
 
Start Watchdog
 
Main:
'cls timer
If Cls_timer > 0 Then Decr Cls_timer
If Cls_timer = 0 Then
 Cls
 Locate 1 , 1
 Lcd Temp ; "C"
 Locate 1 , 5
 Lcd "F:"
 Locate 1 , 11
 Lcd "A:"
 Locate 2 , 1
 Lcd "Fan:"
 Cls_timer = 50
 End If
 
'check temp
If Temp_timer > 0 Then Decr Temp_timer
If Temp_timer = 0 Then
 W = Getadc(0)
 Volt = W * 5
 Temp = Volt / 10
 Temp_timer = 100
 End If
 
'show set points
Locate 1 , 7
Lcd Set_fan ; "C"
Locate 1 , 13
Lcd Set_alarm ; "C"
 
'set fan
If Fan_delay = 0 Then Fan_speed = 0
 
If Temp < Set_fan Then
 If Fan_delay = 0 Then Fan_speed = 0
 Fan_timer = 0
 End If
 
If Temp = Set_fan And Fan_speed <> 3 Then
 Fan_speed = 1
 Fan_delay = 600
 If Fan_timer < 300 Then Incr Fan_timer
 If Fan_timer = 300 Then
 Fan_speed = 2
 Fan_delay = 600
 End If
 End If
 
If Temp > Set_fan Then
 Fan_speed = 3
 Fan_delay = 600
 Fan_timer = 300
 End If
 
'fan timers
If Fan_delay > 0 Then Decr Fan_delay
 
'set fan speed
If Pinb.5 = 0 Then Fan_speed = Fan_speed + 2
If Fan_speed > 3 Then Fan_speed = 3
If Fan_speed = 0 Then Pwm1a = 255
If Fan_speed = 1 Then Pwm1a = 170
If Fan_speed = 2 Then Pwm1a = 105
If Fan_speed = 3 Then Pwm1a = 0
Locate 2 , 5
Lcd Fan_speed
If Pinb.5 = 0 Then
 Locate 2 , 7
 Lcd "F"
 End If
 
'set fan temp
If Pinb.3 = 1 Then C_vifte1 = 0
If Pinb.3 = 0 And C_vifte1 = 0 Then
 C_vifte1 = 1
 Set_fan = Set_fan + 1
 Eeprom_save = 3000
 End If
If Pinb.4 = 1 Then C_vifte2 = 0
If Pinb.4 = 0 And C_vifte2 = 0 Then
 C_vifte2 = 1
 Set_fan = Set_fan - 1
 Eeprom_save = 3000
 End If
 
'set alarm temp
If Pinb.6 = 1 Then C_alarm1 = 0
If Pinb.6 = 0 And C_alarm1 = 0 Then
 C_alarm1 = 1
 Set_alarm = Set_alarm + 1
 Eeprom_save = 3000
 End If
If Pinb.7 = 1 Then C_alarm2 = 0
If Pinb.7 = 0 And C_alarm2 = 0 Then
 C_alarm2 = 1
 Set_alarm = Set_alarm - 1
 Eeprom_save = 3000
 End If
 
'set main temp_alarm
If Temp >= Set_alarm And Alarm_timer < 300 Then Alarm_timer = Alarm_timer + 1
If Alarm_timer = 300 And Alarmled = 0 Then Alarmled = 6
If Temp < Set_alarm Then Alarm_timer = 0
 
'alarmled
If Alarmled > 0 Then Alarmled = Alarmled - 1
If Alarmled = 4 Then Pwm1b = 0
If Alarmled = 1 Then Pwm1b = 255
 
'eeprom save
If Eeprom_save > 0 Then
 Eeprom_save = Eeprom_save - 1
 Locate 1 , 16
 Lcd Chr(1)
 End If
If Eeprom_save = 1 Then
 Eeprom_fan = Set_fan
 Eeprom_alarm = Set_alarm
 Locate 1 , 16
 Lcd Chr(2)
 End If
 
'show timers
Locate 2 , 15
Alarm_timer2 = Alarm_timer / 10
Lcd Alarm_timer2
Locate 2 , 9
Fan_delay2 = Fan_delay / 10
Lcd Fan_delay2
Locate 2 , 12
Fan_timer2 = Fan_timer / 10
Lcd Fan_timer2
 
'lifesignal
If Lifesignal > 0 Then Lifesignal = Lifesignal - 1
If Lifesignal = 6 Then Portb.0 = 1
If Lifesignal = 1 Then Portb.0 = 0
If Lifesignal = 0 Then Lifesignal = 21
 
Reset Watchdog
Waitms 100
Goto Main
End

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Schematic drawing