'************************ TxRx_1.05.bas ***********************
'
'Test program for using the RFM12 or RFM12B
'433MHz Radio Data Transceivers.
'These transceivers sell for about $8.00 US.
'from: http://www.futurlec.com/Radio.shtml
'
'This code + hardware takes serial data from a PC and converts
'it to RF. A second indentical device receives the RF signal and
'converts it back to serial.
'
'This code is not ment to be a complete RF serial link. It is
'for testing and evaluating the RFM12 modules only. However with
'the addition of error detection and correction, I beleve a
'reliable RF link could be relized.
'
'July 28, 2008
'By: David Carr
'***************************************************************
$regfile = "m88def.dat"
$hwstack = 32
$swstack = 10
$framesize = 40
$crystal = 8000000
$baud = 19200
Const File = "TxRx 1.05 .bas"
Const Description = "RFM12 monitor program"
Print
Print Description
Print File
Print Version()
Rfm12_rst Alias Portc.5
Config Rfm12_rst = Input
Config Portb = &B0010_1101
Test_pin Alias Portb.0
Rfm12_cs Alias Portb.2
Set Rfm12_cs
Rfm12_sdi Alias Portb.3
Rfm12_sdo Alias Pinb.4
Set Portb.4
Rfm12_sck Alias Portb.5
Rx_led Alias Portd.5
Config Pind.5 = Output
Tx_led Alias Portd.6
Config Pind.6 = Output
Error_led Alias Portd.7
Config Pind.7 = Output
Config Spi = Hard , Interrupt = Off , Data Order = Msb , Master = Yes , _
Polarity = Low , Phase = 0 , Clockrate = 4 , Noss = 1
Spiinit
Declare Sub Rfm12_spi_wrt
Declare Sub Rfm12_tx(txarray As Byte)
Declare Sub Rfm12_rx(rxarray As Byte)
Declare Sub Rfm12_tx_ready
Declare Sub Rfm12_rx_wait
Declare Sub Rfm12_get_status_bit
Declare Sub Saveflags
Declare Sub Rfm12_clear_fifo
Declare Sub Rfm12_rx_on
Declare Sub Rfm12_init
Declare Sub Printflags
'From: RF12 Programing Guide
'Min Freq 430.24
'Max Freq 439.75
'in 2.5KHz steps
'
'That makes 3800 possible frequencies
'to choose from.
'Fc = the center Freq. in MHz
'Fr = the Freq. register value.
'Fc = 430 + Fr * 0.0025 (MHz)
'Fr = (Fc - 430) * 400
Const Fc = 435.00
Const Fr =(fc - 430) * 400
Const Fcmnd = &HA000 + Fr
'Payload can be up to 254 bytes.
'I have tested up to 128 bytes only.
'const Payload_Size = 128
Const Payload_size = 32
'const Payload_Size = 16
Const Pls_plus1 = Payload_size + 1
'make the test beacon length Payload_Size - 2
Const Beacon = "123456789012345678901234567890"
Dim Tempbit As Bit
Dim Temp As Byte
Dim Tempw As Word
Dim Spi_tx_wrd As Word
Dim Spi_tx_l As Byte At Spi_tx_wrd Overlay
Dim Spi_tx_h As Byte At Spi_tx_wrd + 1 Overlay
Dim Spi_rx_wrd As Word
Dim Spi_rx_l As Byte At Spi_rx_wrd Overlay
Dim Spi_rx_h As Byte At Spi_rx_wrd + 1 Overlay
Dim Rx_status_bit As Bit
Dim Rxbuffer(pls_plus1) As Byte
Dim Rxstring As String * Payload_size At Rxbuffer(1) Overlay
Rxbuffer(pls_plus1) = 0
Dim Txindex As Byte
Dim Txbuffer(pls_plus1) As Byte
Dim Txstring As String * Payload_size At Txbuffer(1) Overlay
Txbuffer(pls_plus1) = 0
Dim Timeout As Word
Dim Cmnd As String * 4
Dim Flags As Byte
Echoflag Alias Flags.0
Beaconflag Alias Flags.1
Sermsgflag Alias Flags.2
Rxonflag Alias Flags.3
Txonflag Alias Flags.4
'I have read somewhere that eram address 0 has a bug
'so I don't use it.
Dim Dummy As Eram Word At 0
'ProgCntr must be at eram address 2.
'ProgCntr is incramented by the bootloader
'each time the chip is flashed.
Dim Progcntr As Eram Word At 2
Dim Savedflags As Eram Byte
Tempw = Progcntr
Print "uC flashed " ; Tempw ; " times."
Print
'kill some time here while
'rfm12 does a power on reset.
Reset Rx_led
Reset Tx_led
Reset Error_led
Waitms 500
Set Rx_led
Set Tx_led
Set Error_led
Rfm12_init
Rfm12_rx_on
Flags = Savedflags
Print "Echo = " ; Echoflag
Print "Beacon = " ; Beaconflag
Cmnd = ""
Do
If Beaconflag = 1 Then
'Tx a test beacon about once a second.
Txstring = Beacon
Print "Tx: " ; Txstring
Rfm12_tx Txbuffer(1)
'now loop waiting for a reply msg.
For Temp = 1 To 255
'poll RFM12 for Rx data.
Rfm12_get_status_bit
If Rx_status_bit = 1 Then
'Rx RxBuffer
Rfm12_rx Rxbuffer(1)
Print "Rx: " ; Rxstring
If Rxstring <> Txstring Then
Reset Error_led
Print "<>"
End If
Rxstring = ""
Exit For
End If
If Temp = 255 Then
Reset Error_led
Print "no echo"
End If
'this delay gives the other module time to echo
'back the beacon.
'waitus 50 'at 38.3kbps, 32 byte payload
'waitus 350 'at 19.2kbps, 128 bytes
Waitus 150 'at 19.2kbps, 32 bytes
Set Error_led
Next Temp
Else
'poll RFM12 for Rx data.
Rfm12_get_status_bit
If Rx_status_bit = 1 Then
'reset RX_LED
'Rx RxBuffer
Rfm12_rx Rxbuffer(1)
Print "Rx: " ; Rxstring
If Echoflag = 1 Then
Print "Ec: " ; Rxstring
'Tx RxBuffer.
Rfm12_tx Rxbuffer(1)
End If
'set RX_LED
End If
End If
Temp = Inkey()
If Temp <> 0 Then
If Temp = 27 Then
'press "esc" to get a command prompt.
Spi_tx_wrd = 0
Rfm12_spi_wrt
Print
Print Description
Print File
Print Version()
Print
Tempw = Progcntr
Print "uC flashed " ; Tempw ; " times."
'print
'print "Status word = " ; bin(SPI_Rx_H) ; "_" ; bin(SPI_Rx_L)
Printflags
Print
Input "Command >" , Cmnd
Print
Rfm12_rx_on
Elseif Temp = 13 Then
Print
Print "Tx: " ; Txstring
'Tx TxBuffer.
Rfm12_tx Txbuffer(1)
Txstring = ""
Txindex = 0
Else
'fill the TxBuffer until <cr> or full.
If Txindex < Payload_size Then
Print Chr(temp);
Incr Txindex
Txbuffer(txindex) = Temp
Temp = Txindex + 1
Txbuffer(temp) = 0
End If
End If
End If
If Cmnd <> "" Then
Select Case Cmnd
Case "u"
'To start the bootloader without using the reset button.
'Press "u <CR>"
'then within 2+3=5 seconds press F4 to start the programer.
Print
Print "Press F4 to start upload."
Waitms 3000
'address of boot loader.
'for mega168
'goto &H1C00
'for mega88
Goto &HC00
Case "c"
'Input a hex command word value to send to RFM12.
'For example enter: c0e0 <enter> will set the
'ouput CLK to 10MHZ.
'see the RFM12 Programing guide for commands.
Print
Input "Enter a Command Word in HEX >" , Cmnd
Spi_tx_wrd = Hexval(cmnd)
Rfm12_spi_wrt
Print "RFM12 returned >" ; Hex(spi_rx_wrd)
Case "b"
Toggle Beaconflag
If Beaconflag = 1 Then Echoflag = 0
Saveflags
Printflags
Case "e"
Toggle Echoflag
If Echoflag = 1 Then Beaconflag = 0
Saveflags
Printflags
Case Else
Print "Unknown Command"
End Select
Print
Cmnd = ""
End If
Loop
Sub Printflags
If Beaconflag = 1 Then
Print "Beacon ON"
Else
Print "Beacon OFF"
End If
If Echoflag = 1 Then
Print "Echo ON"
Else
Print "Echo OFF"
End If
End Sub
Sub Saveflags
'save to eram
Flags = Flags And 3
Savedflags = Flags
End Sub
Sub Rfm12_init
Local I As Byte
Print "Init values:"
'Initialize RFM12
Restore Init_data
For I = 1 To 14
Read Spi_tx_wrd
Print Hex(spi_tx_wrd)
'send init data to RFM12.
Rfm12_spi_wrt
'waitms 100
Next I
Print
End Sub
'***********************************************************************
'The following data lines are RFM12 commands used to initialize the device.
'read the RFM12 progamming guide and data sheets for a complete
'description of these commands.
'
'Configuration settings:
'
'&h80D8 = Configure module for 433Mhz band.
'
'RF center Freq. setting
'select freq with const "Fc" above.
'Fcmnd is a constant that holds the Freq command.
'see the "const" statments at the top of this code.
'example: &hA000 + Fr = &hA7D0 for 435MHz
'
'To change the data rate the following values will need to be adjusted.
'
'bit rate
'&hC611 = 19.2kbps works well at 8MHz
'&hC608 = 38.3kbps works at 8MHz
'
'Rx band width
'&h94A0 = Rx BW = 134KHz works at 8MHz
'&h9480 = 200kHz works at 8MHz
'
'Tx deviation
'&h9850 = 90kHz works at 8MHz
'&h9870 = 120kHz works at 8MHz
Init_data:
Data &H80D8% , &H8298% , Fcmnd% , &HC611% , &H94A0% , &HC2AC% , &HCA81%
Data &HCED4% , &HC483% , &H9850% , &HCC17% , &HE000% , &HC800% , &HC040%
'*************************************************************************
Sub Rfm12_clear_fifo
'Clear FIFO
Spi_tx_wrd = &HCA81
Rfm12_spi_wrt
Spi_tx_wrd = &HCA83
Rfm12_spi_wrt
End Sub
Sub Rfm12_tx(txarray As Byte)
Local I As Byte
Reset Tx_led
'turn on Tx
Spi_tx_wrd = &H8239
Rfm12_spi_wrt
Txonflag = 1
Waitus 150
'Send Preamble.
Restore Txpreamble_data
For I = 1 To 5
Read Spi_tx_wrd
Rfm12_tx_ready
If Timeout = 0 Then Exit For
Rfm12_spi_wrt
Next I
'Send payload.
For I = 1 To Payload_size
Rfm12_tx_ready
If Timeout = 0 Then Exit For
Spi_tx_wrd = &HB800 + Txarray(i)
Rfm12_spi_wrt
Next I
Rfm12_tx_ready
Rfm12_rx_on
Set Tx_led
End Sub
Txpreamble_data:
Data &HB8AA% , &HB8AA% , &HB8AA% , &HB82D% , &HB8D4%
Sub Rfm12_tx_ready
Reset Rfm12_cs
Timeout = 65500
While Rfm12_sdo = 0
Decr Timeout
Waitus 6
If Timeout = 0 Then
Print "Tx Timeout"
Exit While
End If
Wend
End Sub
Sub Rfm12_rx_on
'Start Rx
Spi_tx_wrd = &H8299
Rfm12_spi_wrt
Rfm12_clear_fifo
Rxonflag = 1
Waitus 80
End Sub
Sub Rfm12_rx(rxarray As Byte)
Local I As Byte
Timeout = 1
Reset Rx_led
Spi_tx_wrd = &HB000
For I = 1 To Payload_size
Rfm12_rx_wait
If Timeout = 0 Then
Set Rx_led
Set Error_led
Exit For
End If
Rfm12_spi_wrt
Rxarray(i) = Spi_rx_l
Next I
Rxarray(i) = 0
Rfm12_clear_fifo
Set Rx_led
End Sub
Sub Rfm12_rx_wait
Timeout = 35500
Do
Rfm12_get_status_bit
'timeout if nothing happens.
Decr Timeout
If Timeout = 0 Then
Reset Error_led
Print "Rx Timeout"
Exit Do
End If
Loop Until Rx_status_bit = 1
End Sub
Sub Rfm12_get_status_bit
Reset Rfm12_sdi
Reset Rfm12_cs
Set Rfm12_sck
Rx_status_bit = Rfm12_sdo
Reset Rfm12_sck
Set Rfm12_cs
End Sub
Sub Rfm12_spi_wrt
'Send word (SPI_Tx_wrd) to RFM12.
'Also receive word (SPI_Rx_wrd).
'RFM12 Chip select
Reset Rfm12_cs
'send hi byte.
Spi_rx_h = Spimove(spi_tx_h)
'send lo byte.
Spi_rx_l = Spimove(spi_tx_l)
'deselect chip.
Set Rfm12_cs
End Sub
را با میکروی atmega32a و کامپایلر کدویژن به طور دقیق و مو به مو اجرا کردم و یک فرستنده و گیرنده بر مبنای آن طراحی کردم.از آنتن سیمی به عنوان آنتن ماژول استفاده کردم.اما هیچ چیزی نتوانستم دریافت کنم.موضوع دیگر این است که چطور می توان فهمید ماژول سالم است و آیا امکان دریافت داده از ماژول به میکرو وجود دارد تا مطمئن شویم ماژول سالم است؟آیا روشی برای تست کردن آن و یا نرم افزاری برای شبیه سازی این سیستم وجود دارد؟
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