'**************************************************************** '* Name : Whisper_Q4.BAS * '* Author : Godfried-Willem RAES * '* Notice : Copyleft (c) 2013 Logosoft Public Domain * '* Date : 20-08-2013 * '* Last update: 12.12.2019 * '* Version : 1.6 * '* Notes : Based On Asa-hub code model, later * '**************************************************************** '08.06.2013: PIC: 18F2525 On MidiHub board, 2 PWM motor, lites '14.08.2013: Version 1.0 '18.08.2013: Further development. '19.08.2013: Hardware finished. Version 1.0 flashed. '20.08.2013: Version 1.1 ' Periodic timers added for shaker and note 86 ' rescaling of motor speed for fan9. (note 72) ' Version 1.2 ' low interrupt code removed ' indirection to Keypres removed. Now inline coding. ' keypress coding changed. ' Version 1.3: using lookups for periodic events. '02.11.2013: Note86 renamed to the real function: Sleigh Bells. '13.04.2015: PWM range for fan motor reduced. '15.04.2015: 220nF cap. placed over fan motor load on board ' New firmware uploaded. ' rien ne va plus... ' This firmware performs perfectly on the led testboard... ' When we placed the chip programmed on the testboard on the hub board, ' everything worked as it should... Version 1.4 '20.07.2016: Scaling for fan motor changed as we replaced the motor. ' Now starts running with velo 9. PWM never exceeds 50% ' This is version 1.5 '11.12.2019: Revised to work with the new Proton compiler. The old PIC appeared ' dead on some pins due to a short on the load and a burned mosfet. ' Timers need upgrade, conform to tubo coding. ' For some odd reason we do not get HPWM 2 to work... ' Compiler upgrade to version 3.7.3.3 did not help us out... '12.12.2019: Adding these 2 lines in the 18F2525.inc file made it work again: ' Declare HPWM1_Pin = PORTC.2 ' added 12.12.2019 ' Declare HPWM2_Pin = PORTC.1 ' Reminder: HPWM uses Timer2 ! ' It would be better to implement 10-bit PWM here. ' 10-bit PWM does work now, but if we do that, the PWM base frequency becomes 39kHz... ' 9 bit mode works now with PWM base frequency 19kHz ' Lookup's added and scaling made after measurements with the new motor. ' On the PCB we mounted two clampdiodes BY27 on the PWM mosfets. ' Complete rewrite of the multitasking system, conform the setup for ' Total system crash noticed after more than 1 hour op operation under full load conditions... ' Loopspeed: 151kHz at no load [Tektronics TDS2024C measurement] ' 120kHz with all timers running and high midi-in density. '14.12.2019: adapted from Whisper hub coding, 2019 . Tested o.k. ' Recheck code for Q4 on whisper. Where is the last working pic version now??? '19.05.2020: Chip found burned out on the PWM outputs. Nothing works anymore. '20.05.2020: Fan for note 80 burned out (Pabst 422JH) '21.05.2020: New chip programmed. No code changes. Running out of 18F2525 chips. The one we used ' is the recycled version 2.0 pic taken from ' Loopspeed still 151kHz. Include "18F2525.inc" 'version for the Whisper board. (40MHz) 'Include "18F2620.inc" 'also possible 'Include "18F2520.inc" 'also possible. (40MHz) 'Include "18F25K20.inc" 'for test & debug on an Amicus board. (64MHz) ' Mapping defines for midi-events on pin outputs and inputs for whisper board Q4 $define Shake1 PORTC.5 ' X11-2 - note 84 $define Shake2 PORTC.4 ' X11-3 - note 85 $define Fan7 PORTC.1 ' X17-2 - pwm2 - motor - Fan7 note 80 $define Fan8 PORTC.2 ' X17-3 - pwm1 - motor - Fan8 note 78 ' $define BlueLed PORTA.3 ' $define GreenLed PORTA.4 ' power on indicator (controller #66) ' $define OrangeLed PORTA.5 ' lights up if the fan is activated. 'red LED for debug: $define Debug_Led PORTB.5 ' for testing - red led - watchdog 'for loopspeed measurement: $define Loopspeed PORTB.3 ' configure the input and output pins: Clear SSPCON1.5 'RC3 must be available for I/O TRISA = %01000111 'bits set to 0 are output, 1 = input TRISB = %11100000 TRISC = %11000000 'RC1 en RC2 zijn pwm outputs and must be set to output 'RC6 en RC7 zijn USART I/O and must be set to input 'constant definitions: 'initialisations for the midi input parser: Symbol Midichannel = 11 ' Whisper_Channel Symbol NoteOff_Status = 128 + Midichannel ' 2 bytes follow Symbol NoteOn_Status = 144 + Midichannel Symbol Keypres_Status = 160 + Midichannel ' 2 bytes follow Symbol Control_Status = 176 + Midichannel Symbol ProgChange_Status = 192 + Midichannel ' 1 byte message Symbol Aftertouch_Status = 208 + Midichannel ' 1 byte follows Symbol Pitchbend_Status = 224 + Midichannel ' lsb msb follow 'application specific constants Symbol NrTasks = 2 ' maximum 16 Symbol fPWM = 20000 ' 15.04.2015 his only affects 8-bit pwm mode... ' Setup the USART Declare Hserial_Baud = 31250 ' Set baud rate for the USART to MIDI specs. Declare Hserial_TXSTA = 0x24 ' instead of the normal 0x20 - ?? 0x24 Declare All_Digital = True ' Declare Hserial_Clear = On ' should clear on errors. Bytes get lost of course... ' Create variables Dim Cnt As Dword System Dim CntHw As Cnt.Word1 'used in the timer0 interrupt, to create a 32 bit timer Dim CntLw As TMR0L.Word 'this is the trick to read both TMR0L and TMR0H 'it makes Cntlw the low word of cnt 'We still have to copy the contents of Lw to Cnt Dim time As Cnt Dim maxtim As time.31 ' overflow bit, will cause timer reset after 1h45 ' Dim Tim3 As TMR3L.Word Dim Bytein As Byte System ' midi byte read from buffer Dim MidiIn As Byte System Dim StBit As Bytein.7 ' highest bit of ByteIn Dim i As Byte System ' general purpose counter ' midi variables Dim statusbyte As Byte System Dim noteUit As Byte System ' note off + release value Dim release As Byte System Dim noteAan As Byte System ' note on + release value Dim velo As Byte System Dim notePres As Byte System ' note pressure + pressure value Dim pres As Byte System Dim Ctrl As Byte System ' continuous controller + value Dim value As Byte System Dim prog As Byte System ' program change + program-byte ' Dim aft As Byte System ' channel aftertouch ' Dim pblsb As Byte System ' pitch bend lsb ' Dim pbmsb As Byte System ' pitch bend msb Dim CC66 As Byte System ' global on/off switch Dim PowerOn As CC66.0 Dim pw1 As Word System ' Fan9 Dim pw2 As Word System ' string motor Dim st As Byte System Dim b1 As Byte System Dim b2 As Byte System Dim Lites As Byte System ' bits used as flags, also used for shakers Dim idx As Byte System Dim nxt As Dword System Dim Vels[NrTasks] As Byte '----------------------------------------------------------------------------------------- ' Load the USART Interrupt handler And buffer read subroutines into memory 'Include "ADC.inc" ' Load the ADC macros into the program - used in the IRQ include. Dim IndexIn As Byte System Dim Indexout As Byte System Dim Ringbuffer[256] As Byte Include "Whisper19_Irq.inc" ' our own basic version for UART And Timer0/3 Interrupt, 12.2019 Include "HPWM10.inc" ' for 9 and 10-bit PWM ' if we dont include this, we default to 8 bit PWM $ifdef _HPWM10_INC_ 'OpenAnalog10 ' for 10-bit pwm 39kHz OpenAnalog9 ' for 9 bit pwm 19kHz $endif 'framework for a multitasker, version 2019 Dim TimVals[NrTasks] As Dword Dim Resort As Byte System Dim Resort_flag As Resort.0 ' flag to signal the requirement to resort timers Dim Dur[128] As Word ' duration lookup Dim Fan_1[128] As Word ' pwm lookup for fan Dim Fan_2[128] As Word ' pwm lookup Dim stap As Float Dim tmp As Float 'make sure we initialize the used pins on start up: Low Shake1 Low Shake2 Low Debug_Led $ifndef _HPWM10_INC_ HPWM 2, 0, fPWM ' connected to RC1 HPWM 1, 0, fPWM ' connected to RC2 $else WriteAnalog1 0 WriteAnalog2 0 $endif Clear CC66 GoSub Dur_Lookup ' also reads lookup for the PWM's '----------------------------------------------------------------------------------------- ' Main program starts here MAIN: High Debug_Led DelayMS 50 ' wait for stability Low Debug_Led Set idx Set TimVals Clear Lites GoSub Init_Usart_Interrupt ' Initiate the USART serial buffer interrupt ' this procedure is in the include file GoSub Clear_Serial_Buffer ' Clear the serial buffer and reset its pointers ' in the include as well ' Configure Timer0 for: ' Clear TMR0L and TMR0H registers ' Interrupt on Timer0 overflow ' 16-bit operation ' Internal clock source 40MHz ' 1:256 Prescaler : thus 40MHz / 256 = 156.250kHz ' Opentimer0 (Timer_INT_On & T0_16BIT & T0_SOURCE_INT & T0_PS_1_256) in macro file. Clear T1CON Clear IntConBits_T0IF ' clear interrupt flag Set INTCONBITS_T0IE ' enable interrupt on overflow T0CON = %10000111 ' bit 7 = enable/disable ' bit 6 = 1=8 bit, 0=16 bit ' bit 5 = 1 pin input, 0= Internal Clk0 ' bit 4 = HL or LH transition when bit5 =1 ' bit 3 = 1= bypass prescaler, 0= input from prescaler ' bit 2-0 = prescaler select: 111= 1:256 ' Setup the High priorities for the interrupts ' open and start timer3 for sampling: Clear T3CON Clear PIR2BITS_TMR3IF ' clear IRQ flag Set PIE2BITS_TMR3IE ' irq on ' Clear Tim3 ' Clear TMR3L And TMR3H registers Set RCONbits_IPEN ' Enable priority interrupts Clear IPR2bits_TMR3IP ' Set Timer3 as a low priority interrupt source ' we can also set T3Con in one instruction as: T3CON = %10110000 ' oef, now it works... ' bit 7 = 16 bit mode ' bit 6,3 = 0, 0 ' bit 5,4 = 1:8 prescale ' bit 2 = 0 ' bit 1 = 0 Internal clock = Fosc/4 ' bit 0 : 1= enable timer 3, 0= disable set to 0 for Whisper! ' maximum count = 52.42ms, 1 tick =0.8uS, lowest freq.=19Hz HRSOut Ctrl, 66, 64 ' dummy, 2019 ' start the main program loop: Do ' Create an infinite loop Cnt.Word0 = CntLw ' read timer, note time is an alias for Cnt GetMidiIn () Bytein = MidiIn ' Read data from the serial buffer, with no timeout ' Start the midi parser. Midi_Parse: If Bytein > Control_Status Then ' here higher statusses are not implemented. If Bytein > 253 Then '254 = midiclock, 255= reset 'midiclock can interrupt all other msg's... '255 had to be intercepted since thats what we 'get when no new byte flows in (?) GoTo Check_Timers 'throw away... Else Clear statusbyte 'reset the status byte GoTo Check_Timers 'throw away End If EndIf If StBit =1 Then 'should be faster than If Bytein > 127 Then 'status byte received, bit 7 is set Clear statusbyte 'if on another channel, the statusbyte needs a reset Select Bytein 'eqv to Select case ByteIn Case NoteOff_Status statusbyte = Bytein Set noteUit '= 255 'reset value. Cannot be 0 !!! Set release '= 255 '0 is a valid midi note! Case NoteOn_Status statusbyte = Bytein Set noteAan '= 255 Set velo '= 255 Case Keypres_Status ' used for lights statusbyte = Bytein Set notePres '= 255 Set pres '= 255 Case Control_Status ' only 123 statusbyte = Bytein Set Ctrl '= 255 Set value '= 255 ' Case ProgChange_Status ' statusbyte = Bytein ' prog = 255 ' Case Aftertouch_Status ' statusbyte = Bytein ' aft = 255 ' Case Pitchbend_Status ' statusbyte = Bytein ' pblsb = 255 ' pbmsb = 255 End Select Else 'midi byte is 7 bits Select statusbyte Case 0 'not a message for this channel GoTo Check_Timers 'disregard Case NoteOff_Status If noteUit = 255 Then noteUit = Bytein Else 'release = Bytein 'message complete, so we can do the action... Select noteUit $ifndef _HPWM10_INC_ Case 80 HPWM 2, 0, fPWM ' connected to RC1 'Clear OrangeLed Case 78 HPWM 1, 0, fPWM ' RC2 $else Case 80 WriteAnalog2 0 Case 78 WriteAnalog1 0 $endif Case 84 Clear Shake1 ' shaker 1 Clear Lites.0 Set TimVals[0] Set Resort_flag Case 85 Clear Shake2 ' shaker 2 Clear Lites.1 Set TimVals[1] Set Resort_flag EndSelect Set noteUit 'reset EndIf Case NoteOn_Status If noteAan = 255 Then noteAan = Bytein Else velo = Bytein If velo = 0 Then Select noteAan $ifndef _HPWM10_INC_ Case 80 HPWM 2, 0, fPWM ' connected to RC1 Case 78 HPWM 1, 0, fPWM ' rubbed string motor - RC2 $else Case 80 WriteAnalog2 0 Case 78 WriteAnalog1 0 $endif Case 84 Clear Shake1 Clear Lites.0 Set TimVals[0] Set Resort_flag Case 85 Clear Shake2 Clear Lites.1 Set TimVals[1] Set Resort_flag EndSelect Set noteAan 'reset !!! EndIf If PowerOn = 1 Then ' so CC66 must have sent Select noteAan $ifndef _HPWM10_INC_ Case 80 pw1.Byte0 = velo HPWM 2, pw1, fPWM ' connected to RC1 'Set OrangeLed Case 78 pw2.Byte0 = 128 + velo HPWM 1, pw2, fPWM ' RC2 $else Case 80 ' using the lookup table: WriteAnalog2 Fan_1[velo] Case 78 WriteAnalog1 Fan_2[velo] $endif Case 84 Set Shake1 Set Lites.0 If velo < 127 Then TimVals[0] = time + Dur[velo] Else Set TimVals[0] EndIf Vels[0] = velo Set Resort_flag Case 85 Set Shake2 Set Lites.1 If velo < 127 Then TimVals[1] = time + Dur[velo] Else Set TimVals[1] EndIf Vels[1] = velo Set Resort_flag EndSelect EndIf Set noteAan EndIf Case Keypres_Status 'used for lite flashing speed modulation and for shaker! If notePres = 255 Then notePres = Bytein Else pres = Bytein GoSub KeyPres EndIf Case Control_Status 'this is where the action takes place for controllers If Ctrl = 255 Then Ctrl = Bytein Else value = Bytein GoSub Controller EndIf ' Case ProgChange_Status ' If prog = 255 Then 'single byte message ' prog = Bytein 'weak coding... ' GoSub ProgChange ' EndIf EndSelect EndIf If Resort_flag = 1 Then GoSub SortTimers ' so we resort only if an incoming midi command changed something with the timers EndIf Check_Timers: If idx < NrTasks Then ' we moeten alleen checken wanneer er een timer loopt If time >= nxt Then ' nagaan of de eerstvolgende timer afgelopen is... ' in dit geval is de eerste timer afgelopen en moeten we de juiste aktie ondernemen: Set nxt.31 ' timer reset, is immers afgelopen ' aan de hand van idx weten we welke timer dit is ' clear notes.idx dit slikt de compiler niet... Select idx Case 0 GoSub Task0 Case 1 GoSub Task1 Case Else ' in dit geval is idx geset GoTo jumpout ' no need to resort EndSelect GoSub SortTimers ' find a new nxt and idx EndIf Else ' idx >= NrTasks, no timers running, so to avoid overflows, we can reset the timer If maxtim = 1 Then Clear Cnt ' = time Set TimVals Clear Lites EndIf EndIf ' here we insert a toggle bit to measure the loopspeed. jumpout: Btg Loopspeed Loop ' end of the main loop SortTimers: 'look up the next smallest timer value in the Timvals array ' zoek de de volgende kleinste timer waarde: Set idx ' makes it 255 Set nxt.31 ' nxt is set on entry. - for speed, we just set the highest bit For i = 0 To NrTasks -1 If TimVals[i] < nxt Then nxt = TimVals[i] ' NrTasks dword comparisons idx = i EndIf Next i Clear Resort_flag Return KeyPres: 'the note to which the pressure should be applied is passed in NotePres, the value in Pres 'here we use it for shaking the shakers '20.08.2013: coding modified such that the repetition period is only refreshed after the previous ' timer flip over. ' Thus we can make smoother accel. and decel. Select notePres Case 84 If Lites.0 = 1 Then TimVals[0] = time + Dur[pres] Vels[0] = pres Else Set TimVals[0] Clear Shake1 EndIf Set Resort_flag Case 85 If Lites.1 = 1 Then TimVals[1] = time + Dur[pres] Vels[1] = pres Else Set TimVals[1] Clear Shake2 EndIf Set Resort_flag End Select Set notePres '= 255 Return 'ProgChange: ' Set prog '= 255 'this is not realy required 'Return 'Pitchbend: ' 'only implemented on dsPIC based robots ' Set pblsb '= 255 'Return 'Aftertouch: ' 'this is the channel aftertouch, affecting all notes ' Set aft '= 255 'not mandatory 'Return Controller: Select Ctrl Case 66 'on/off for the robot If value = 0 Then Clear PowerOn 'CC66.0 Clear CC66 GoSub PowerDown Else Set PowerOn 'CC66.0 Set CC66 EndIf Case 123 GoSub AllNotesOff End Select Set Ctrl 'mandatory reset Return AllNotesOff: Set TimVals Set Resort_flag $ifndef _HPWM10_INC_ HPWM 2, 0, fPWM ' connected to RC1 HPWM 1, 0, fPWM ' rubbed string motor - RC2 $else WriteAnalog2 0 WriteAnalog1 0 $endif Clear Shake1 Clear Shake2 Return PowerDown: Set TimVals Set Resort_flag Clear pw1 Clear pw2 $ifndef _HPWM10_INC_ HPWM 2, 0, fPWM ' connected to RC1 HPWM 1, 0, fPWM ' rubbed string motor - RC2 $else WriteAnalog2 0 WriteAnalog1 0 $endif Clear Shake1 Clear Shake2 Return Task0: If Lites.0 = 0 Then 'stop task Set TimVals[0] Clear Shake1 Else 'reload task0 i = Vels[0] 'compiler refuses the notation Dur[Vels[0]] TimVals[0] = time + Dur[i] 'here we need the rsi value to be used... Btg Shake1 'Toggle EndIf Set Resort_flag Return Task1: If Lites.1 = 0 Then Set TimVals[1] 'stop task Clear Shake2 Else i = Vels[1] TimVals[1] = time + Dur[i] Btg Shake2 EndIf Set Resort_flag Return Dur_Lookup: 'this lookup is for a good scaling of the velocity byte on event periodicity ' the values are calculated based on a timer resolution of 24 microseconds. ' The values must be containable in a word (16 bits!) ' This is the simple Power Basic program wherewith the lookup was calculated: 'FUNCTION PBMAIN ()AS LONG ' OPEN "Whisper_Dur_scales.inc" FOR OUTPUT AS #1 ' LOCAL unit, fastest, slowest, velo_traject AS DOUBLE ' LOCAL velo, i AS DWORD ' unit = 0.000024 ' in seconds (24 microseconds) ' fastest = 1 / 16 ' 16 Hz ' slowest = 1.5 ' 0.66 Hz ' velo_traject = slowest - fastest ' PRINT# 1, "Lookup for Whisper durations in periodic events" ' FOR i = 1 TO 127 ' velo = velo_traject / i ' PRINT i; velo, ' PRINT# 1 ,"Dur[";i;"] ="; velo ' NEXT i 'DO: LOOP UNTIL INKEY$ <> "" 'END FUNCTION Dur[ 1 ] = 59896 Dur[ 2 ] = 29948 Dur[ 3 ] = 19965 Dur[ 4 ] = 14974 Dur[ 5 ] = 11979 Dur[ 6 ] = 9983 Dur[ 7 ] = 8557 Dur[ 8 ] = 7487 Dur[ 9 ] = 6655 Dur[ 10 ] = 5990 Dur[ 11 ] = 5445 Dur[ 12 ] = 4991 Dur[ 13 ] = 4607 Dur[ 14 ] = 4278 Dur[ 15 ] = 3993 Dur[ 16 ] = 3743 Dur[ 17 ] = 3523 Dur[ 18 ] = 3328 Dur[ 19 ] = 3152 Dur[ 20 ] = 2995 Dur[ 21 ] = 2852 Dur[ 22 ] = 2723 Dur[ 23 ] = 2604 Dur[ 24 ] = 2496 Dur[ 25 ] = 2396 Dur[ 26 ] = 2304 Dur[ 27 ] = 2218 Dur[ 28 ] = 2139 Dur[ 29 ] = 2065 Dur[ 30 ] = 1997 Dur[ 31 ] = 1932 Dur[ 32 ] = 1872 Dur[ 33 ] = 1815 Dur[ 34 ] = 1762 Dur[ 35 ] = 1711 Dur[ 36 ] = 1664 Dur[ 37 ] = 1619 Dur[ 38 ] = 1576 Dur[ 39 ] = 1536 Dur[ 40 ] = 1497 Dur[ 41 ] = 1461 Dur[ 42 ] = 1426 Dur[ 43 ] = 1393 Dur[ 44 ] = 1361 Dur[ 45 ] = 1331 Dur[ 46 ] = 1302 Dur[ 47 ] = 1274 Dur[ 48 ] = 1248 Dur[ 49 ] = 1222 Dur[ 50 ] = 1198 Dur[ 51 ] = 1174 Dur[ 52 ] = 1152 Dur[ 53 ] = 1130 Dur[ 54 ] = 1109 Dur[ 55 ] = 1089 Dur[ 56 ] = 1070 Dur[ 57 ] = 1051 Dur[ 58 ] = 1033 Dur[ 59 ] = 1015 Dur[ 60 ] = 998 Dur[ 61 ] = 982 Dur[ 62 ] = 966 Dur[ 63 ] = 951 Dur[ 64 ] = 936 Dur[ 65 ] = 921 Dur[ 66 ] = 908 Dur[ 67 ] = 894 Dur[ 68 ] = 881 Dur[ 69 ] = 868 Dur[ 70 ] = 856 Dur[ 71 ] = 844 Dur[ 72 ] = 832 Dur[ 73 ] = 820 Dur[ 74 ] = 809 Dur[ 75 ] = 799 Dur[ 76 ] = 788 Dur[ 77 ] = 778 Dur[ 78 ] = 768 Dur[ 79 ] = 758 Dur[ 80 ] = 749 Dur[ 81 ] = 739 Dur[ 82 ] = 730 Dur[ 83 ] = 722 Dur[ 84 ] = 713 Dur[ 85 ] = 705 Dur[ 86 ] = 696 Dur[ 87 ] = 688 Dur[ 88 ] = 681 Dur[ 89 ] = 673 Dur[ 90 ] = 666 Dur[ 91 ] = 658 Dur[ 92 ] = 651 Dur[ 93 ] = 644 Dur[ 94 ] = 637 Dur[ 95 ] = 630 Dur[ 96 ] = 624 Dur[ 97 ] = 617 Dur[ 98 ] = 611 Dur[ 99 ] = 605 Dur[ 100 ] = 599 Dur[ 101 ] = 593 Dur[ 102 ] = 587 Dur[ 103 ] = 582 Dur[ 104 ] = 576 Dur[ 105 ] = 570 Dur[ 106 ] = 565 Dur[ 107 ] = 560 Dur[ 108 ] = 555 Dur[ 109 ] = 550 Dur[ 110 ] = 545 Dur[ 111 ] = 540 Dur[ 112 ] = 535 Dur[ 113 ] = 530 Dur[ 114 ] = 525 Dur[ 115 ] = 521 Dur[ 116 ] = 516 Dur[ 117 ] = 512 Dur[ 118 ] = 508 Dur[ 119 ] = 503 Dur[ 120 ] = 499 Dur[ 121 ] = 495 Dur[ 122 ] = 491 Dur[ 123 ] = 487 Dur[ 124 ] = 483 Dur[ 125 ] = 479 Dur[ 126 ] = 475 Dur[ 127 ] = 472 ' lookups for 9-bit pwm: ' full-range linear scaling: ' Pabst 422JH - note 80 Fan_1[0] = 0 Fan_1[1] = 105 ' 3.5V Fan_1[127] = 416 ' 13.8V stap = Fan_1[127] - Fan_1[1] ' stap is float stap = stap / 127.0 For i = 2 To 126 tmp = Fan_1[1] + (i * stap) ' tmp is float Fan_1[i] = tmp Next i ' Pabst 412J - note 78 ' to be checked... ' this one burned out 20.05.2020 Fan_2[0] = 0 Fan_2[1] = 105 ' 3.5V Fan_2[127] = 416 ' 13.8V stap = Fan_2[127] - Fan_2[1] stap = stap / 127.0 For i = 2 To 126 tmp = Fan_2[1] + (i * stap) Fan_2[i] = tmp Next i Return '[EOF]