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Frans,
I find that in Delphi
type : Char = #0..#255;
which is 8 bits. A CHAR in Component Pascal is 16 bits.
A SHORTCHAR is 8 bits. Try using SHORTCHAR.
-Doug Danforth
frans-pietervonck{([at]})nowhere.xy
> Hello Blackboxers,
>
> I want to blink a led using using Kainka's "PC Interfaces under Windows".
> The book comes with a dll - PORT.DLL - which enables communication
> with the serial ports under XP.
> With Delphi the led blinks. In BlackBox, I can't get it light. I
> suspect that my way of translating the delphi PCHAR-type
> into an array is not correct. Can I use an array as an null terminated
> string? Anyone some advice?
>
> In delphi, opening the com-port is done as follows.
>
> Function OPENCOM(S:PCHAR):Integer;stdcall; external PORT.DLL;
>
> for example: OpenCom (Pchar('COM1:9600,N,8,1'));
> OpemCom returns a 1 when connected, 0 when failed.
>
> Following my the translation of the function to component pascal
>
> INTERFACE:
> constr* = ARRAY 18 OF CHAR;
> PROCEDURE opencom* ["OPENCOM"]
> (Constr:constr) : INTEGER;
>
> TESTFUNCTION:
> open := PortDLL.opencom("COM1:9600,N,8,1");
>
>
>
> The two modules I've used.
> -----------------------
> INTERFACE
> ----------------------
> MODULE PortDLL ["PORT.DLL"];
> IMPORT SYSTEM;
> TYPE
>
> constr* = ARRAY 18 OF CHAR;
>
> PROCEDURE opencom* ["OPENCOM"]
> (Constr:constr) : INTEGER;
>
> END PortDLL.
>
> ----------------------------------
> TESTMODULE
> ----------------------------------
> MODULE TestPort;
>
> IMPORT PortDLL, StdLog;
> VAR open: INTEGER;
> PROCEDURE Do*;
> BEGIN
> open := 3;
> open := PortDLL.opencom("COM1:9600,N,8,1");
> IF open = 1 THEN
> StdLog.String("Opening COM1 successful. "); StdLog.Ln
> END;
> IF open = 0 THEN
> StdLog.String("Opening COM1 failed."); StdLog.Ln
> END;
> END Do;
>
> END TestPort.
> -----------------------------------
>
> --- BlackBox
> --- send subject HELP or UNSUBSCRIBE to blackbox{([at]})nowhere.xy>
>
--- BlackBox
--- send subject HELP or UNSUBSCRIBE to blackbox{([at]})nowhere.xy
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Received on Mon May 29 2006 - 17:53:31 UTC