$regfile = "m2560def.dat" '8K SRAM
$crystal = 16000000
$hwstack = 64
$swstack = 16
$framesize = 200
$baud = 115200
' FREQ DUTY GENERATOR OPERATED BY TWO POTENTIOMETERS
Debug Off
Const Min_freq = 20 'Hz
Const Max_freq = 2000 'Hz
Const Min_duty = 1 ' 1%-100%
Const Max_duty = 100 ' 1%-100%
Config Submode = New 'Subs first then you can use them
'***********************************************
'* ALPHANUMERIC LCD *
'***********************************************
Config Lcdpin = Pin , Db4 = Portc.3 , Db5 = Portc.5 , Db6 = Portc.7 , Db7 = Porta.6 , E = Portl.5 , Rs = Portl.1 ' , Wr = Porta.1
Config Lcd = 16x2
Cursor Off , Noblink
Cls
'***********************************************
'* I/O *
'***********************************************
Config Portb.7 = Output : Led Alias Portb.7 'Arduino Mega LED
Config Portb.5 = Output : Freq_out Alias Portb.5 'Freq/Duty output pin
'***********************************************
'* ADC *
'***********************************************
'freq potentiometer on A0
'duty potentiometer on A1
Config Adc = Single , Prescaler = Auto , Reference = Avcc
Dim New_adc As Word , Freq_adc As Word , Duty_adc As Word
'***********************************************
'* VARIABLES *
'***********************************************
'multipurpose
Dim Helpb As Byte , N As Byte
'program
Dim New_freq As Word , New_duty As Word , Change As Byte
'timer
Dim Value As Dword , Ustaw As Word , Prescaler As Word , Help_d As Dword
Dim Wartosc_dla_tccr1b As Byte , Wypelnienie As Word , Proc As Word
'***********************************************
'* TIMER1 *
'***********************************************
'----------------------------------------------------------------
'TCCR1A -> |COM1A1 COM1A0 COM1B1 COM1B0 -- -- WGM11 WGM10
'TCCR1B -> | ICNC1 ICES1 -- WGM13 WGM12 CS12 CS11 CS10 FOR MEGA328P
'TCCR1C -> | FOC1A FOC1B -- -- -- -- -- --
'----------------------------------------------------------------
Const Freq = _xtal
' WGM13-|
Const Pwm_presc1 = &B00010001 'for TCCR1B
Const Pwm_presc8 = &B00010010
Const Pwm_presc64 = &B00010011
Const Pwm_presc256 = &B00010100
Const Pwm_presc1024 = &B00010101
Const Set_output_mode = &B10100000 'for TCCR1A
Function Map(byval Value As Word , Byval Min_in As Word , Byval Max_in As Word , Byval Min_out As Word , Byval Max_out As Word)as Word
Local I1 As Long
Local I2 As Long
I1 = Value - Min_in
I2 = Max_out - Min_out
I1 = I1 * I2
I2 = Max_in - Min_in
I1 = I1 / I2
I1 = I1 + Min_out
I1 = Abs(i1)
Map = I1
'Map = Abs(i1)
If Map >= Max_out Then Map = Max_out - 1
End Function
Sub Calc_duty()
Help_d = Value * New_duty
Help_d = Help_d / 100
Wypelnienie = Help_d
Ocr1a = Wypelnienie
End Sub
Locate 1 , 1 : Lcd "Freq="
Locate 2 , 1 : Lcd "Duty="
Freq_adc = 1024 : Duty_adc = 1024 'refresh even if zero
Do
New_adc = 0
For N = 1 To 64
New_adc = New_adc + Getadc(0)
Next
Shift New_adc , Right , 6
If Freq_adc <> New_adc Then
Freq_adc = New_adc
New_freq = Map(freq_adc , 0 , 1023 , Min_freq , Max_freq) ' <<< 0-1023 scaled here into 20 to 2000
Locate 1 , 6 : Lcd New_freq ; "Hz "
Change = 1
End If
New_adc = 0
For N = 1 To 64
New_adc = New_adc + Getadc(1)
Next
Shift New_adc , Right , 6
If Duty_adc <> New_adc Then
Duty_adc = New_adc
New_duty = Map(duty_adc , 0 , 1023 , Min_duty , Max_duty) ' <<< 0-1023 scaled here into 1 to 100
Locate 2 , 6 : Lcd New_duty ; "% "
Change = 1
End If
If Change = 1 Then
Change = 0
Help_d = New_freq
If Help_d > 0 Then
Value = Freq 'uC clock speed
Select Case Help_d
Case 1
'256
Wartosc_dla_tccr1b = Pwm_presc256
Shift Value , Right , 8
Case 2 To 15
'64
Wartosc_dla_tccr1b = Pwm_presc64
Shift Value , Right , 6
Case 16 To 122 '16000000Hz/131072 = 15Hz '
'8
Wartosc_dla_tccr1b = Pwm_presc8
Shift Value , Right , 3
Case Else '16000000Hz/131072 = 122Hz
'1
Wartosc_dla_tccr1b = Pwm_presc1
End Select
Value = Value \ Help_d
Shift Value , Right , 1 'divide /2
Decr Value : Ustaw = Value 'substract one
Call Calc_duty()
Icr1 = Ustaw
Tccr1a = Set_output_mode 'set count up, reset count down
Tccr1b = Wartosc_dla_tccr1b 'set prescaler and WGM13
End If
End If
Loop
End |
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