RFM12-Artikel im Elektor - jemand Erfahrung damit???

**mat-sche** · 05.02.2009, 16:59

Hallo,

auch ich möchte in der nächsten Zeit mit dem RFM-Modul arbeiten und dazu habe ich eine Seite gefunden: http://www.flashcraft.de/index.php?lang=de
die Dich interessieren könnte!
Florian hat ein Board und auch eine funktionierende Software erstellt, die das RFM12 über RS232 anspricht. Er nutzt dazu einen mega32 der sich um alle Arbeiten zum senden/empfangen kümmert und du nur noch das Modul über RS232 ansprechen musst!
Gruß MAT

**guenter1604** · 06.02.2009, 14:43

Soooo:

2 ATMega8 an einem ein Taster am anderen eine LED

2 Pollin RFM12 mit 434Mhz

Code:

'Elektor RFM12 Sender

$regfile = "m8def.dat"
$hwstack = 32
$swstack = 10
$framesize = 40

$crystal = 16000000
$baud = 19200

Nsel Alias Portb.2
Sdi Alias Portb.3
Sdo Alias Pinb.4
Sck Alias Portb.5

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.5 = Output
Config Pinc.4 = Input
Pinc.4 = 1

'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


 Do
    For N = 1 To 10
      Data_out(n) = 6
    Next N
    If Pinc.4 = 0 Then
    Data_out(2) = 12
    Else
    Data_out(2) = 10
    End If
    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

Empfänger:

Code:

'Elektor RFM12 Empfänger

$regfile = "m8def.dat"
$hwstack = 32
$swstack = 10
$framesize = 40

$crystal = 16000000
$baud = 19200

Nsel Alias Portb.2
Sdi Alias Portb.3
Sdo Alias Pinb.4
Sck Alias Portb.5

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

'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

 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
    If Data_in(2) = 12 Then
     Portc.5 = 1
     Else
     Portc.5 = 0
     End If
 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

Es lief erst zuverlässig, nachdem ich die Fusebits SUT0 und SUT1 gelöcht (also aktiviert) habe. Der Prozessor hat jetzt mehr Zeit zum Einschwingen.

Günter

**ThomasW** · 10.02.2009, 16:27

Hallo

ich habe mich mal rumgespielt mit den Modulen und ein Programm mit Interrupt geschrieben.

2 x Atmega8 , 2x RFM12 , Modul sendet nach 1 min einen Text an das andere, Befehle von der Com werden gesendet, SPi Befehle von der Com werden in das Modul geschrieben.

Beispiel:
Com1: >TXD_Hallo + CHR13 sendet Hallo ans andere Modul und dieses gibt es mit Print aus.

Com1: >SPI_47274 + Chr(13) schreibt B8AA ans Modul

Com1: >INI_0 + Chr(13) Modul wird nochmal Init

Com1: >STA_0000 + CHr(13) liest Statusregister vom Modul und gibt es aus.

Viel Spaß

Mfg

Code:

'######################## RFM12  sende/empfang Test mit Interrupt made by Tomi0815 ######################################
'
'Test 2x ATMega8 und 2x RFM12
'
'
'
' M8  / PB5       -->  RFM12 / SCK
' M8  / PB4       -->  RFM12 / SDO
' M8  / PB3       -->  RFM12 / SDI
' M8  / PB2       -->  RFM12 / nSEL  --> Wiederstand (10K) nach VCC (Pullup nSEL = High beim Programmieren des M8)
' M8  / PD2(INT0) -->  RFM12 / nIRQ
'
'
' M8  / PD7       -->  Taster nach GND ( Starte Teststring schleife )
' M8  / PB0       -->  LED K -|<|- A --> Wiederstand --> VCC  ( Kontrolle )
'
' RFM12 / FSK-Data --> Wiederstand(1K) nach VCC
' RFM12 VDD / GMD / Antenne
'
' OSCCAL für Print an ATMEGA8 anpassen
'
'
''####################################################################################################################

$regfile = "m8def.dat"
$hwstack = 64
$swstack = 20
$framesize = 40

$crystal = 8000000
$baud = 19200

Baud = 19200

Osccal = 195

'##################################################################################################################   dim,conf

Const Sync_byte = 62

Dim Sek_timer As Long : Sek_timer = 0

'-------------------------------------------------------------------------------    für TX/RX
Dim Buffer As String * 32
Dim Buffer_len As Byte
Dim Buffer_wert As Word

Dim Startbit As Bit
Dim Split_buffer_1 As String * 15
Dim Split_buffer_2 As String * 15

Dim Rxd_byte As Byte
Dim Rxd_buffer_len As Byte
Dim Rxd_in_counter As Byte
Dim Rxd_buffer As String * 32


Dim Txd_buffer As String * 32
Dim Txd_len As Byte
Dim Txd_byte_counter As Byte
Dim Txd_byte As Byte
Dim Txd_string As String * 1

'-------------------------------------------------------------------------------    für RFM12
Dim Daten_empfangen As Bit : Daten_empfangen = 0

Dim Rfm12_rxd_len As Byte

Dim Rfm12_txd_string As String * 50
Dim Rfm12_rxd_string As String * 50

Dim Rfm12_rxd_bit_counter As Byte
Dim Rfm12_rxd_bit_counter2 As Byte
Dim Rfm12_rxd_data_counter As Byte
Dim Rfm12_rxd_byte As Byte

Dim Rfm12_txd_bit_counter As Byte
Dim Rfm12_txd_byte_len As Byte
Dim Rfm12_txd_byte As Byte
Dim Rfm12_txd_string_1x As String * 1

Dim Bit_counter As Byte
Dim Init_counter As Byte
Dim Bit_out As Integer
Dim Spi_out As Word
Dim Spi_in As Word

Dim Tx_rfm12_ready As Bit : Tx_rfm12_ready = 0

Dim Rgit_ffit As Bit
Dim Por As Bit
Dim Rug_ffov As Bit
Dim Wkup As Bit
Dim Ext As Bit
Dim Lbd As Bit

Dim Empfang_status As Byte : Empfang_status = 0
Dim Sende_status As Byte : Sende_status = 0

'--------------------------------------------------------------------------------------------------  config

Config Int0 = Falling
Config Timer1 = Timer , Prescale = 256

'--------------------------------------------------------------------------------------------------  output

Led Alias Portb.0 : Ddrb.0 = 1 : Portb.0 = 1
Rfm12_cs Alias Portb.2 : Ddrb.2 = 1 : Portb.2 = 1
Sdi Alias Portb.3 : Ddrb.3 = 1 : Portb.3 = 1
Sck Alias Portb.5 : Ddrb.5 = 1 : Portb.5 = 0

'--------------------------------------------------------------------------------------------------  input

Sdo Alias Pinb.4 : Ddrb.4 = 0 : Portb.4 = 1
Taster Alias Pind.7 : Ddrd.7 = 0 : Portd.7 = 1              'pullup portd.7
Ddrd.2 = 0 : Portd.2 = 1

'--------------------------------------------------------------------------------------------------  Starteinstellungen

Print "Start"

Gosub Rfm12_init

On Urxc Usart_receive_complete_ir
On Utxc Usart_transmit_complete_ir
On Udre Usart_data_register_empty_ir

Enable Urxc
Enable Utxc
Disable Udre

On Int0 Isr_int0
Enable Int0

On Timer1 Timer1_isr
Enable Timer1
Timer1 = 34285

Enable Interrupts

Empfang_status = 0
Sende_status = 0

Rfm12_txd_string = "Ready" + Chr(13)
Rfm12_rxd_string = ""

Rfm12_txd_bit_counter = 0
Gosub Send_rfm12
Waitms 200
Empfang_status = 1

'##################################################################################################################   Hauptschleife

Do

If Rfm12_txd_string <> "" Then
         Rfm12_txd_bit_counter = 0
         Gosub Send_rfm12
         Waitms 200
         Rfm12_txd_string = ""
         Empfang_status = 1
End If


If Empfang_status = 1 Then                                  '  Empfang freigegeben
         Rfm12_rxd_bit_counter = 0
         Spi_out = &H82C8
         Gosub Spi_trans
         Spi_out = &HCA83
         Gosub Spi_trans
         Empfang_status = 2
         Enable Int0
End If

If Daten_empfangen = 1 Then                                 ' Daten Empfangen
         Spi_out = &H8208
         Gosub Spi_trans

         Print Rfm12_rxd_string;

         Rfm12_rxd_string = ""
         Rfm12_rxd_bit_counter = 0
         Daten_empfangen = 0

         Enable Int0
         Empfang_status = 1
End If

If Buffer <> "" Then Gosub Rxd_input_auswerten:


Loop
'##################################################################################################################   timer0_isr
Timer1_isr:
Timer1 = 34285

Incr Sek_timer

If Sek_timer = 60 Then
      Rfm12_txd_string = "M1_M2_XXXX_XXXX" + Chr(13)
      Toggle Led
      Sek_timer = 0
End If

Return
'##################################################################################################################   INT0

Isr_int0:
'------------------------------------------------------------------------------------------------------------------
                                                                                                   'Statusregister lesen
Spi_out = &H0000
Gosub Spi_trans

Rgit_ffit = Spi_in.15
Por = Spi_in.14
Rug_ffov = Spi_in.13
Wkup = Spi_in.12
Ext = Spi_in.11
Lbd = Spi_in.10

'-----------------------------------------------------------------------------------------------------------------

If Rgit_ffit = 1 And Empfang_status = 2 Then

   Incr Rfm12_rxd_bit_counter
   Spi_out = &HB000
   Gosub Spi_trans

   If Rfm12_rxd_bit_counter < 50 Then

         Rfm12_rxd_byte = Spi_in
         Rfm12_rxd_string = Rfm12_rxd_string + Chr(rfm12_rxd_byte)

         If Rfm12_rxd_byte = 13 Then
            Daten_empfangen = 1
            Disable Int0
         End If
   End If

End If

If Pind.2 = 0 Then Print Bin(spi_in)

Return

'##################################################################################################################   rfm12_tx_ready
Rfm12_tx_ready:

  Rfm12_cs = 0
  Do
  Loop Until Sdo = 1

Return
'##################################################################################################################   Send_rfm12

Send_rfm12:

  Rfm12_txd_byte_len = Len(rfm12_txd_string)

  If Rfm12_txd_byte_len = 0 Then Return

  Disable Int0

  Spi_out = &H0000
  Gosub Spi_trans

  Spi_out = &HB8AA
  Gosub Spi_trans

  Spi_out = &HB8AA
  Gosub Spi_trans

  Spi_out = &H8239
  Gosub Spi_trans
  Gosub Rfm12_tx_ready

  Spi_out = &HB82D
  Gosub Spi_trans
  Gosub Rfm12_tx_ready

  Spi_out = &HB8D4
  Gosub Spi_trans
  Gosub Rfm12_tx_ready

  For Rfm12_txd_bit_counter = 1 To Rfm12_txd_byte_len
    Rfm12_txd_string_1x = Mid(rfm12_txd_string , Rfm12_txd_bit_counter , 1 )
    Rfm12_txd_byte = Rfm12_txd_string_1x
    Spi_out = &HB800 + Rfm12_txd_byte
    Gosub Spi_trans
    Gosub Rfm12_tx_ready
  Next Rfm12_txd_bit_counter

  Spi_out = &HB8AA
  Gosub Spi_trans
  Gosub Rfm12_tx_ready

  Spi_out = &HB8AA
  Gosub Spi_trans
  Gosub Rfm12_tx_ready

  Sende_status = 3

  Spi_out = &H8208
  Gosub Spi_trans

  Spi_out = &HB8AA
  Gosub Spi_trans

  Spi_out = &H0000
  Gosub Spi_trans

Return
'##################################################################################################################   spi_trans
Spi_trans:

Rfm12_cs = 0
Spi_in = 0

   For Bit_counter = 1 To 16
      Bit_out = Spi_out And &H8000
      If Bit_out = 0 Then
         Sdi = 0
      Else
         Sdi = 1
      End If
         Spi_out = Spi_out * 2
         Spi_in = Spi_in * 2
         Spi_in = Spi_in + Sdo
         Sck = 1
      Waitus 5
         Sck = 0
   Next Bit_counter

Rfm12_cs = 1

Return

'##################################################################################################################   rfm12_init
Rfm12_init:

Waitms 200

For Init_counter = 1 To 12

   Select Case Init_counter
       Case 1 :
               'Spi_out = &H80E7                             '868 mhz
               Spi_out = &H80D7                             '433 mhz
      Case 2 : Spi_out = &H82D9
      Case 3 : Spi_out = &HA67C
      Case 4 : Spi_out = &HC6A4
      Case 5 : Spi_out = &H94C0
      Case 6 : Spi_out = &HC2AC
      Case 7 : Spi_out = &HCA81
      Case 8 : Spi_out = &HC483
      Case 9 : Spi_out = &H9827
      Case 10 : Spi_out = &HE000
      Case 11 : Spi_out = &HC800
      Case 12 : Spi_out = &HC000


   End Select

      Gosub Spi_trans
      Waitms 100

Next Init_counter


Return

'##################################################################################################################     Rxd_input_auswerten

Rxd_input_auswerten:

Buffer = Ucase(rxd_buffer)
Buffer_len = Len(buffer)
Split_buffer_1 = Mid(buffer , 2 , 3)

If Split_buffer_1 = "TXD" Then

      Rfm12_txd_string = Buffer + Chr(13)

      Spi_out = &H8208
      Gosub Spi_trans


      Txd_buffer = "sende :" + Buffer + Chr(13)

      Rfm12_txd_bit_counter = 0
      Gosub Send_rfm12
      'Waitms 200
      Empfang_status = 1

      Rfm12_txd_string = ""

   Else

      Split_buffer_2 = Mid(buffer , 6 , Buffer_len)
      Buffer_wert = Val(split_buffer_2)

End If

Select Case Split_buffer_1

   Case "SPI" :
                  Spi_out = Buffer_wert
                  Gosub Spi_trans
                  Txd_buffer = "OK_" + Hex(buffer_wert) + Chr(13)

   Case "STA" :
                  Spi_out = Buffer_wert
                  Gosub Spi_trans
                  Txd_buffer = Bin(spi_in) + Chr(13)

   Case "INI" :
                  Gosub Rfm12_init
                  Txd_buffer = "INIT" + Chr(13)

End Select



If Txd_buffer = "" Then Txd_buffer = "<ERROR" + Chr(13)
Txd_len = Len(txd_buffer)
Txd_byte_counter = 0
Enable Udre
Buffer = ""
Return

'###############################################################################    USART Receive Complete (Urxc)
Usart_receive_complete_ir:

push r12
push r13
push r14
push r15

Rxd_byte = Udr

If Rxd_byte = Sync_byte And Startbit = 0 Then
            Startbit = 1
            Rxd_buffer = ""
            Rxd_in_counter = 0
End If

If Startbit = 1 Then

            Incr Rxd_in_counter

            If Rxd_byte <> 13 Then
                     If Rxd_in_counter < 30 Then
                           Rxd_buffer = Rxd_buffer + Chr(rxd_byte)
                     End If
               Else
                     Buffer = Rxd_buffer
                     Disable Urxc
                     Startbit = 0

            End If
End If

pop r15
pop r14
pop r13
pop r12

Return

'###############################################################################    USART Data Register Empty (Udre)
Usart_data_register_empty_ir:

push r12
push r13
push r14
push r15

If Txd_byte_counter < Txd_len Then
      Txd_byte_counter = Txd_byte_counter + 1
      Txd_string = Mid(txd_buffer , Txd_byte_counter , 1)
      Txd_byte = Txd_string
      Udr = Txd_byte
  Else
      Txd_byte_counter = 0
      Txd_len = 0
      Txd_buffer = ""
      Disable Udre
End If

pop r15
pop r14
pop r13
pop r12

Return
'###############################################################################    Usart Transmit Complete (Utxc)
Usart_transmit_complete_ir:
      Enable Urxc                                           'enable Empfang
Return

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