[Gambas-user] Issue/Problem with Serial Port Component

[ron]

On Sunday 04 June 2006 23:52, nando wrote:
> I have tested this for hours...
> 
> PUBLIC SPortReceiveString AS STRING
> 
> SUB SPort_Read()
> 
>   DIM s AS STRING
>   DIM ls AS INTEGER
> 
>   ls = LOF(SPort)
>   'IF ls > 1 THEN DEC ls   '<---always read 1 less than what LOF offers
> 
>   READ # SPort, s, ls
> 
>   PRINT s  '<--help to debug
> 
>   SPortReceiveString = SPortReceiveString & s  'accumulate input
> 
>   'There is some testing of SPortReceiveString here
> 
> END
> 
> Comments:
> Serial Port data received is in groups of about 120 bytes every 10 minutes.
> Every READ event is a small bunch of characters received.
> 
> I have found out that it consistently happens that
> the during the SPort_Read event of the second last bunch of chars,
> there are more data being receive by the kernel or SPort control
> but an event will not happen.
> 
> If I unREM the REMed line...
>   
>   IF ls > 1 THEN DEC ls   '<---always read 1 less than what LOF offers
> 
> then it works perfect every time.
> An event will happen for the very past burst of serial data in.
> 
> -Fernando
> 

What is the real content of those 120 bytes and what program
send the data?

I'm thinking on a CR/LF problem.
*nix use normal only one of them and if both are used
the are CR/LF (or LF/CR).
Windows use always both but reverse to *nix.

One of them is the line terminator in gambas and when I'm right
not returned in the string
With  READ # SPort, s, ls you use a binairy transfer and this
should include all bytes.