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Problem with a subroutine call

 
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spamiam



Joined: 13 Nov 2005
Posts: 689
Posted: 04 August 2006, 22:55 PM    Post subject: Problem with a subroutine call Reply with quote
I have a set of modules that used to compile and work (as far as I can recall) and I am now getting an error on compile. It is a set of modules using driving a sparkfun LCD display.

I just upgraded the compiler and VM to the newest versions. I think I was 2 versions outdated previously.

I get the following error:

Quote:
ZX_SF_LCD_API.bas:175: Error: reference to undefined identifier "ClearDisplay"


The program line in question is:

Code:
Public Sub LCDClearScreen()

    Call LCDPutCommand(ClearDisplay)

End Sub


I have defined the identifier in the same module with:

Code:
Public Enum LCDCommandType
    ClearDisplay      = 1
    Set20CharWide      = 3
   Set16CharWide      = 4
   Set4Lines         = 5
   Set2Lines         = 6
   HitachiCommand        = 17
   SetGeometryCmd       = 124
    SetCursorPositionCmd = 128
End Enum


And the subroutine is defined in another module in the same project as:

Code:
Public Sub LCDPutCommand(ByVal Value As LCDCommandType)

 'This procedure transmits an LCD-specific command to the device.

    Dim Temp As Byte

    Temp = CByte(Value)
   Call PutQueueByte(OutPutQueue, 254)
    Call PutQueueByte(OutputQueue, Temp)

End Sub


I do not see why this will not compile properly! And it used to!

-Tony
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dkinzer
Site Admin


Joined: 03 Sep 2005
Posts: 2593
Location: Portland, OR
Posted: 05 August 2006, 0:08 AM    Post subject: Reply with quote
The test code below compiles without errors or warnings using v1.2.7 of the compiler (the latest published). As far as I can tell, it embodies the elements that you described.
Code:
Public Enum LCDCommandType
   ClearDisplay         = 1
   Set20CharWide        = 3
   Set16CharWide        = 4
   Set4Lines            = 5
   Set2Lines            = 6
   HitachiCommand       = 17
   SetGeometryCmd       = 124
   SetCursorPositionCmd = 128
End Enum

Sub Main()
   Call LCDPutCommand(ClearDisplay)
End Sub

Public Sub LCDPutCommand(ByVal Value As LCDCommandType)
   Debug.Print CStr(Value)
End Sub

If you could send me the code by email (in a .zip, please), I can figure out what's going on. Alternately, you may want to distill the code down to a simple test case, like that above, that demonstrates the problem.
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dkinzer
Site Admin


Joined: 03 Sep 2005
Posts: 2593
Location: Portland, OR
Posted: 05 August 2006, 21:49 PM    Post subject: Reply with quote
The source of the problem has been located and the error has been fixed. We plan to post a compiler update within the next few days that will resolve this issue.
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