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Thema: TWI_BTR wird nicht 1

  1. #1
    Erfahrener Benutzer Roboter Genie
    Registriert seit
    08.09.2007
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    Berlin
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    1.578

    TWI_BTR wird nicht 1

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    Powerstation Test
    Hallo,

    da bei meinem derzeitigen Projekt die I2C Verbindung nicht klappt, habe ich an ein paar Stellen im Code die Variablen ausgeben lassen und bin zu der Feststellung gekommen, dass TWI_BTR nie kleiner 2 wird. Ich verstehe allerdings nicht ganz warum? IMHO sollte es doch 1 sein, wenn der Master nur noch 1 Byte vom Slave haben will?! Evtl. könnte jemand ja mal drüber sehen
    Hier der Code für den Master:
    Code:
    $regfile = "m328pdef.dat"
    $crystal = 16000000
    $framesize = 80
    $hwstack = 80
    $swstack = 80
    
    
    
    Declare Sub Init_system()
    Declare Function Tastatur() As Byte
    Declare Sub Walze_drehen()
    Declare Function Codieren(byval Codieren_in As Byte) As Byte
    Declare Function Reflektor(byval Reflektor_in As Byte) As Byte
    
    
    
    Config Timer0 = Pwm , Compare A Pwm = Clear Down , Compare B Pwm = Clear Down , Prescale = 1
    Pwm0a = 0                                                   'rot
    Pwm0b = 0                                                   'grün
    
    
    $lib "i2c_twi.lbx"
    Config Scl = Portc.5
    Config Sda = Portc.4
    I2cinit
    Config Twi = 400000
    
    
    Const Slave_write = &H70
    Const Slave_read = &H71
    Const Gen_call = &H00
    
    
    Dim Ar_out(4) As Byte
    
    Dim Walze_1(26) As Byte
    Dim Walze_1_inv(26) As Byte
    
    Dim Pointer_1 As Byte
    
    Dim Ar_out_old(4) As Byte
    
    Dim Fehler As Word
    Dim Durchlauefe As Word
    Dim Korrekt As Word
    
    Dim Tmp As Byte
    Dim I As Byte
    Dim A As Byte
    
    
    Dim _out As Byte                                            'ascii-wert (skaliert auf 1-26)
    Dim _in As Byte                                             'ascii-wert (skaliert auf 1-26)
    
    Const _a = 1
    Const _b = 2
    Const _c = 3
    Const _d = 4
    Const _e = 5
    Const _f = 6
    Const _g = 7
    Const _h = 8
    Const _i = 9
    Const _j = 10
    Const _k = 11
    Const _l = 12
    Const _m = 13
    Const _n = 14
    Const _o = 15
    Const _p = 16
    Const _q = 17
    Const _r = 18
    Const _s = 19
    Const _t = 20
    Const _u = 21
    Const _v = 22
    Const _w = 23
    Const _x = 24
    Const _y = 25
    Const _z = 26
    
    Call Init_system()
    
    For I = 1 To 5
    Pwm0a = 250
    Pwm0b = 0
    Waitms 100
    Pwm0a = 0
    Pwm0b = 250
    Waitms 100
    Next I
    
    Pwm0a = 0
    Pwm0b = 0
    
    Waitms 200
    
    
    
    Do
    
    
    Call Init_system()
    For A = 1 To 4
       Ar_out(a) = _a                                           'Tastatur()
       Ar_out_old(a) = Ar_out(a)
       'Ar_out(a) = Codieren(ar_out(a))
    Next A
    
    I2csend Slave_write , Ar_out(1) , 4
    
    Waitms 100
    
    I2creceive Slave_read , Ar_out(1) , 4 , 4
    
    
    If Ar_out(1) = Ar_out_old(1) And Ar_out(2) = Ar_out_old(2) And Ar_out(3) = Ar_out_old(3) And Ar_out(4) = Ar_out_old(4) Then
       Pwm0a = 0
       Pwm0b = 250
    Else
       Pwm0a = 250
       Pwm0b = 0
    End If
    
    Wait 1
    
    
    Loop
    
    
    
    Sub Walze_drehen()
    Local Tmp2 As Byte
    Tmp2 = Walze_1(1)
    For Pointer_1 = 1 To 26
       Tmp = Pointer_1 + 1
       If Tmp = 27 Then Tmp = 1
       Walze_1(pointer_1) = Walze_1(tmp)
       If Pointer_1 = 26 Then
          Walze_1(26) = Tmp2
       End If
       Walze_1_inv(walze_1(pointer_1)) = Pointer_1
    Next Pointer_1
    End Sub
    
    
    Function Tastatur() As Byte
    Tastatur = Rnd(25) + 1
    End Function
    
    
    Function Codieren(byval Codieren_in As Byte) As Byte
       Tmp = Walze_1(codieren_in)
       Tmp = Reflektor(tmp)
       Codieren = Walze_1_inv(tmp)
       Call Walze_drehen()
    End Function
    
    
    Function Reflektor(byval Reflektor_in As Byte) As Byte
    If Reflektor_in.0 = 0 Then
       Reflektor = Reflektor_in + 1
       If Reflektor = 27 Then Reflektor = 1
    Else
       Reflektor = Reflektor_in - 1
       If Reflektor = 0 Then Reflektor = 26
    End If
    End Function
    
    
    Sub Init_system()
    Walze_1(1) = 23
    Walze_1(2) = 15
    Walze_1(3) = 9
    Walze_1(4) = 24
    Walze_1(5) = 7
    Walze_1(6) = 1
    Walze_1(7) = 22
    Walze_1(8) = 17
    Walze_1(9) = 12
    Walze_1(10) = 13
    Walze_1(11) = 26
    Walze_1(12) = 2
    Walze_1(13) = 5
    Walze_1(14) = 21
    Walze_1(15) = 14
    Walze_1(16) = 25
    Walze_1(17) = 11
    Walze_1(18) = 6
    Walze_1(19) = 16
    Walze_1(20) = 8
    Walze_1(21) = 3
    Walze_1(22) = 18
    Walze_1(23) = 4
    Walze_1(24) = 19
    Walze_1(25) = 10
    Walze_1(26) = 20
    
    Walze_1_inv(23) = 1
    Walze_1_inv(15) = 2
    Walze_1_inv(9) = 3
    Walze_1_inv(24) = 4
    Walze_1_inv(7) = 5
    Walze_1_inv(1) = 6
    Walze_1_inv(22) = 7
    Walze_1_inv(17) = 8
    Walze_1_inv(12) = 9
    Walze_1_inv(13) = 10
    Walze_1_inv(26) = 11
    Walze_1_inv(2) = 12
    Walze_1_inv(5) = 13
    Walze_1_inv(21) = 14
    Walze_1_inv(14) = 15
    Walze_1_inv(25) = 16
    Walze_1_inv(11) = 17
    Walze_1_inv(6) = 18
    Walze_1_inv(16) = 19
    Walze_1_inv(8) = 20
    Walze_1_inv(3) = 21
    Walze_1_inv(18) = 22
    Walze_1_inv(4) = 23
    Walze_1_inv(19) = 24
    Walze_1_inv(10) = 25
    Walze_1_inv(20) = 26
    End Sub
    
    End
    Und der Slave:
    Code:
    $regfile = "m32def.dat"
    $crystal = 16000000
    $framesize = 80
    $hwstack = 80
    $swstack = 80
    
    
    Declare Sub Init_system()
    Declare Function Tastatur() As Byte
    Declare Sub Walze_drehen()
    Declare Function Codieren(byval Codieren_in As Byte) As Byte
    Declare Function Reflektor(byval Reflektor_in As Byte) As Byte
    
    
    
    $lib "i2c_twi-slave.lbx"
    Config Twislave = &H70 , Btr = 4 , Bitrate = 400000 , Save = Save , Gencall = 1
    Config Sda = Portc.1
    Config Scl = Portc.0
    I2cinit
    
    
    
    Config Lcd = 16 * 2
    Config Lcdpin = Pin , Db4 = Portb.0 , Db5 = Portb.1 , Db6 = Portb.2 , Db7 = Portb.3 , E = Portb.4 , Rs = Portb.5
    Config Lcdbus = 4
    Initlcd
    Cls
    Cursor Off Noblink
    Deflcdchar 0 , 32 , 32 , 1 , 18 , 20 , 24 , 16 , 32
    
    Dim Walze_1(26) As Byte
    Dim Walze_1_inv(26) As Byte
    
    Dim Pointer_1 As Byte
    
    Dim Ar_out(4) As Byte
    Dim Ar_out_old(4) As Byte
    
    Dim Fehler As Word
    Dim Durchlauefe As Word
    Dim Korrekt As Word
    Dim Dechiffriert(4) As Byte
    
    Dim Tmp As Byte
    Dim I As Byte
    
    Dim _out As Byte                                            'ascii-wert (skaliert auf 1-26)
    Dim _in As Byte                                             'ascii-wert (skaliert auf 1-26)
    
    Const _a = 1
    Const _b = 2
    Const _c = 3
    Const _d = 4
    Const _e = 5
    Const _f = 6
    Const _g = 7
    Const _h = 8
    Const _i = 9
    Const _j = 10
    Const _k = 11
    Const _l = 12
    Const _m = 13
    Const _n = 14
    Const _o = 15
    Const _p = 16
    Const _q = 17
    Const _r = 18
    Const _s = 19
    Const _t = 20
    Const _u = 21
    Const _v = 22
    Const _w = 23
    Const _x = 24
    Const _y = 25
    Const _z = 26
    
    Call Init_system()
    
    Dim X As Byte
    
    
    Waitms 200
    
    Enable Interrupts
    
    
    
    Do
    
    
    !nop
    
    
    Loop
    
    
    Sub Walze_drehen()
    Local Tmp2 As Byte
    Tmp2 = Walze_1(1)
    For Pointer_1 = 1 To 26
       Tmp = Pointer_1 + 1
       If Tmp = 27 Then Tmp = 1
       Walze_1(pointer_1) = Walze_1(tmp)
       If Pointer_1 = 26 Then
          Walze_1(26) = Tmp2
       End If
       Walze_1_inv(walze_1(pointer_1)) = Pointer_1
    Next Pointer_1
    End Sub
    
    
    Function Tastatur() As Byte
    Tastatur = Rnd(25) + 1
    End Function
    
    
    Function Codieren(byval Codieren_in As Byte) As Byte
       Tmp = Walze_1(codieren_in)
       Tmp = Reflektor(tmp)
       Codieren = Walze_1_inv(tmp)
       Call Walze_drehen()
    End Function
    
    
    Function Reflektor(byval Reflektor_in As Byte) As Byte
    If Reflektor_in.0 = 0 Then
       Reflektor = Reflektor_in + 1
       If Reflektor = 27 Then Reflektor = 1
    Else
       Reflektor = Reflektor_in - 1
       If Reflektor = 0 Then Reflektor = 26
    End If
    End Function
    
    
    Sub Init_system()
    Walze_1(1) = 23
    Walze_1(2) = 15
    Walze_1(3) = 9
    Walze_1(4) = 24
    Walze_1(5) = 7
    Walze_1(6) = 1
    Walze_1(7) = 22
    Walze_1(8) = 17
    Walze_1(9) = 12
    Walze_1(10) = 13
    Walze_1(11) = 26
    Walze_1(12) = 2
    Walze_1(13) = 5
    Walze_1(14) = 21
    Walze_1(15) = 14
    Walze_1(16) = 25
    Walze_1(17) = 11
    Walze_1(18) = 6
    Walze_1(19) = 16
    Walze_1(20) = 8
    Walze_1(21) = 3
    Walze_1(22) = 18
    Walze_1(23) = 4
    Walze_1(24) = 19
    Walze_1(25) = 10
    Walze_1(26) = 20
    
    Walze_1_inv(23) = 1
    Walze_1_inv(15) = 2
    Walze_1_inv(9) = 3
    Walze_1_inv(24) = 4
    Walze_1_inv(7) = 5
    Walze_1_inv(1) = 6
    Walze_1_inv(22) = 7
    Walze_1_inv(17) = 8
    Walze_1_inv(12) = 9
    Walze_1_inv(13) = 10
    Walze_1_inv(26) = 11
    Walze_1_inv(2) = 12
    Walze_1_inv(5) = 13
    Walze_1_inv(21) = 14
    Walze_1_inv(14) = 15
    Walze_1_inv(25) = 16
    Walze_1_inv(11) = 17
    Walze_1_inv(6) = 18
    Walze_1_inv(16) = 19
    Walze_1_inv(8) = 20
    Walze_1_inv(3) = 21
    Walze_1_inv(18) = 22
    Walze_1_inv(4) = 23
    Walze_1_inv(19) = 24
    Walze_1_inv(10) = 25
    Walze_1_inv(20) = 26
    End Sub
    
    
    Twi_write_addressed:
    Return
    
    '***************************
    
    Twi_gotdata:
       Ar_out(twi_btw) = Twi
       If Twi_btw = 1 Then Call Init_system()
       'Locate 1 , 1
       'Lcd Ar_out(1) ; ":" ; Ar_out(2) ; ":" ; Ar_out(3) ; ":" ; Ar_out(4) ; "  "
       Dechiffriert(twi_btw) = Codieren(ar_out(twi_btw))
    Return
    
    '***************************
    
    Twi_stop_rstart_received:
    Return
    
    '***************************
    
    Twi_read_addressed:
    Return
    
    '***************************
    
    Twi_master_needs_more_byte:
       Twi = Dechiffriert(twi_btr)
       Locate 1 , Twi_btr
       Lcd Twi_btr
       If Twi_btr = 1 Then
       Locate 2 , 1
       Lcd "a"
       Else
       Locate 2 , 1
       Lcd " "
       End If
    Return
    
    '***************************
    
    Twi_master_need_nomore_byte:
    Return
    
    '***************************
    
    Twi_slave_error:
    Return
    
    
    End
    Vielen Dank & Gruß
    Chris

    EDIT:
    Habe den Fehler gefunden; Wenn der Master den Slave das erste mal über die Read-Addresse anspricht, wird das erste Byte direkt in der Twi_read_addressed verlangt und somit ist zu diesem Zeitpunkt Twi_btr = 1 .
    Geändert von Che Guevara (12.09.2011 um 21:46 Uhr)

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