Hallo,
ich habe 2 RFM12 Funkmodule mit dem Code von Elektor getestet. Nun habe ich eine Verständnissfrage zur Baudrateneinstellung.
Wie stellt man die Baudrate für die Funkübertragung ein bzw was muss ich ändern um zb. auf 9600 Baud zu kommen?

Code:
'Init
  Nsel = 1
  Sck = 0
 'D = Spi16(&H80d7)                                         ' El , Ef , 11.5pf, 433 MHz band
  D = Spi16(&H80e7)                                         ' El , Ef , 11.5pf, 868 MHz band
  D = Spi16(&H82d9)                                         '!er , !ebb , Et , Es , Ex , !eb , !ew , Dc
  D = Spi16(&Ha67c)                                         ' 434,15 MHz / 868,3 MHz
  D = Spi16(&Hc647)                                         ' 4.8kbps
  D = Spi16(&H94a4)                                         ' Vdi , Fast , 134 kHz , 0db , -79dbm
  D = Spi16(&Hc2ac)                                         ' Al , !ml , Dig , Dqd4
  D = Spi16(&Hca81)                                         ' Fifo8 , Sync , !ff , Dr
  D = Spi16(&Hc483)                                         ' @pwr , No Rstric , !st , !fi , Oe , En
  D = Spi16(&H9850)                                         ' 90 kHz , power - 0 dB
  D = Spi16(&He000)                                         '
  D = Spi16(&Hc800)                                         '
  D = Spi16(&Hc000)                                         ' 1 MHz , 2.2V

  Freq = 868.300
bzw. hier der ganze Code:
Code:
$regfile = "m32def.dat"
$hwstack = 32
$swstack = 10
$framesize = 40

$crystal = 14745600
$baud = 9600


Nsel Alias Portb.4
Sdi Alias Portb.5
Sdo Alias Pinb.6
Sck Alias Portb.7

Dim D As Word
Dim Data_in(10) As Byte
Dim Data_out(10) As Byte
Dim N As Byte
Dim Timeout As Word
Dim T As Word
Dim Tt As Word
Dim Freq As Single

Declare Sub Send_rfm12
Declare Sub Receive_rfm12
Declare Sub Freq_rfm12
Declare Sub Wait_rfm12
Declare Function Spi16(byval Dout As Word) As Word

Config Nsel = Output
Config Sdi = Output
Config Sck = Output
Config Portc = Output
Porta = &HFF

'Init
  Nsel = 1
  Sck = 0
 'D = Spi16(&H80d7)                                         ' El , Ef , 11.5pf, 433 MHz band
  D = Spi16(&H80e7)                                         ' El , Ef , 11.5pf, 868 MHz band
  D = Spi16(&H82d9)                                         '!er , !ebb , Et , Es , Ex , !eb , !ew , Dc
  D = Spi16(&Ha67c)                                         ' 434,15 MHz / 868,3 MHz
  D = Spi16(&Hc647)                                         ' 4.8kbps
  D = Spi16(&H94a4)                                         ' Vdi , Fast , 134 kHz , 0db , -79dbm
  D = Spi16(&Hc2ac)                                         ' Al , !ml , Dig , Dqd4
  D = Spi16(&Hca81)                                         ' Fifo8 , Sync , !ff , Dr
  D = Spi16(&Hc483)                                         ' @pwr , No Rstric , !st , !fi , Oe , En
  D = Spi16(&H9850)                                         ' 90 kHz , power - 0 dB
  D = Spi16(&He000)                                         '
  D = Spi16(&Hc800)                                         '
  D = Spi16(&Hc000)                                         ' 1 MHz , 2.2V

  Freq = 868.300
  Freq_rfm12

'start transmitter, no data
'Goto Test1:

'transmit  data
'Goto Test2:

'transmit key data
'Goto Test3:

'start receiver, all data
'Goto Test4:

'start receiver, matched data
'Goto Test5:


 Do
    For N = 1 To 10
      Data_out(n) = N
    Next N
    Send_rfm12
    Waitms 500
    For N = 1 To 10
       Data_in(n) = 0
    Next N
    Timeout = 400 + Rnd(1000)
    Receive_rfm12
    For N = 1 To 10
       Print Data_in(n) ; " "
       'Print " ";
    Next N
    Waitms 700
 Loop


Sub Freq_rfm12
  If Freq < 800 Then Freq = Freq * 2
  Freq = Freq - 860
  D = Freq / 0.0050
  If D < 96 Then D = 96
  If D > 3903 Then D = 3903
  D = D + &HA000
  D = Spi16(d)
End Sub


Sub Send_rfm12
  D = Spi16(&H8238)
  Wait_rfm12
  D = Spi16(&Hb8aa)
  Wait_rfm12
  D = Spi16(&Hb8aa)
  Wait_rfm12
  D = Spi16(&Hb8aa)
  Wait_rfm12
  D = Spi16(&Hb82d)
  Wait_rfm12
  D = Spi16(&Hb8d4)
  For N = 1 To 10
    Wait_rfm12
    D = &HB800 + Data_out(n)
    D = Spi16(d)
  Next N
  Wait_rfm12
  D = Spi16(&Hb8aa)
  Wait_rfm12
  D = Spi16(&Hb8aa)
  Wait_rfm12
  D = Spi16(&H8208)
End Sub

Sub Wait_rfm12
  Nsel = 0
  Do
  Loop Until Sdo = 1
End Sub


Sub Receive_rfm12
  Tt = Timeout * 10
  D = Spi16(&H82c8)
  D = Spi16(&Hca83)
  For N = 1 To 10
    Nsel = 0
    T = 0
    Do
      T = T + 1
      Waitus 100
      If T > Tt Then Goto Nosignal
    Loop Until Sdo = 1
    D = Spi16(&Hb000)
    Data_in(n) = D
  Next N
Nosignal:
  D = Spi16(&H8208)
End Sub


Function Spi16(byval Dout As Word) As Word
Local Nspi As Integer
Local Dspi As Integer
Local Dsdo As Word
  Nsel = 0
  Dsdo = 0
  For Nspi = 1 To 16
    Dspi = Dout And &H8000
    If Dspi = 0 Then
       Sdi = 0
    Else
       Sdi = 1
    End If
    Dout = Dout * 2
    Dsdo = Dsdo * 2
    Dsdo = Dsdo + Sdo
    Sck = 1
    Waitus 5
    Sck = 0
  Next Nspi
  Nsel = 1
  Spi16 = Dsdo
End Function



'transceiver tests

'start transmitter, no data
Test1:
  D = Spi16(&H8238)
  Do
  Loop


  'transmit data
Test2:
  D = Spi16(&H8238)
  Do
    Wait_rfm12
    D = Spi16(&Hb8aa)
  Loop


  'transmit key data
Test3:
  D = Spi16(&H8238)
  Do
    Wait_rfm12
    D = Spi16(&Hb82d)
    Wait_rfm12
    D = Spi16(&Hb8d4)
  Loop


'start receiver, all data
Test4:
  D = Spi16(&H82c8)
  D = Spi16(&Hca87)
  For N = 1 To 100
    Wait_rfm12
    D = Spi16(&Hb000)
    Data_in(n) = D
    Print Chr(d);
  Next N
  Do
  Loop


'start receiver, matched data
Test5:
    D = Spi16(&H82c8)
    D = Spi16(&Hca83)
    For N = 1 To 100
      Wait_rfm12
      D = Spi16(&Hb000)
      Data_in(n) = D
      Print Chr(d);
    Next N
  Do
  Loop