Hello!

I am using two 89c55wd. In which sendind data through serial port at baud rate 1200 from one microcontroller to another.

As second u_controller receive nearly three string then it transmitt same data to first u_controller and first u_controller display it on LCD(20 * 4).

I am facing problem that actuall data didnot received and displayed.

I am using bascom-51 compiler.

Here is my program given.



' Serial Transmission
$regfile = "89c55wd.dat"
$crystal = 11059200
$baud = 1200

Dim Rx_data As String * 5
Dim Num As String * 3
Dim Test As Byte

Config Lcd = 20 * 4
Config Lcdpin = Pin , Db4 = P1.4 , Db5 = P1.5 , Db6 = P1.6 , Db7 = P1.7 , E = P1.1 , Rs = P1.0
Config Debounce = 30

Cls
Lcd "Allah"
Lowerline
$asm
clr scon.1
$end Asm

On Serial Isr_ser
Enable Serial
Enable Interrupts

Do
Debounce P2.0 , 0 , Test1 , Sub
Loop
End

Isr_ser:
$asm

clr scon.1
$end Asm
Rx_data = Inkey()
If Rx_data > "/" And Rx_data < ":" Then
Lcd Rx_data
End If
If Rx_data > "`" And Rx_data < "{" Then
Lcd Rx_data
End If
Return



Test1:
Test = 4
Disable Serial
$asm
setb scon.1
$end Asm
Print "x" ; Test ; "?"
$asm
clr scon.1
$end Asm
Enable Serial
Return

Here is Second controller Program code


$regfile = "89c55wd.dat"
$crystal = 11059200
$baud = 1200

Dim Status As String * 3
Dim Rtt_data As String * 3
Dim St1 As String * 1
Dim St2 As String * 1
Dim St3 As String * 1
Dim A As Byte
$asm
clr scon.1
$end Asm

On Serial Isr_ser
Enable Serial
Enable Interrupts

Do
If A = 1 Then
St1 = Rtt_data
Elseif A = 2 Then
St2 = Rtt_data
Elseif A = 3 Then
St3 = Rtt_data
Elseif A = 4 Then

Status = Status + St1
Status = Status + St2
Status = Status + St3
Call Check
A = 0
Status = ""

End If

Loop
End


Isr_ser:
$asm
clr scon.1
$end Asm
If Rtt_data > "/" And Rtt_data < ":" Then
Incr A
End If
If Rtt_data > "`" And Rtt_data < "{" Then
Incr A
End If
If Rtt_data = "?" Then

End If
Return


' Check
Sub Check

Disable Serial
$asm
setb scon.1
$end Asm
Print Status
$asm
clr scon.1
$end Asm
Enable Serial
End Sub

Thanks in advance