[Gambas-user] Serial port (gb.net) curious error - reading byte value incorrectly.

[Werner]

On 13/01/10 11:00, Anthony Ivan wrote:
> Hello to All,
>
> [Gambas 2.19.0-1 on Fedora 12, Intel X86_64]
>
> I am currently working on a little project that communicates with a VHF 
> radio via the MAP27 instruction set. All is working perfectly except for 
> one small error... as detailed below...
>
> When the radio communicates with the PC the serialport_read() triggers 
> perfectly and takes the byte's of data provided and places them into a 
> queue for processing ... a typical translated incoming hex string may 
> look something like:
> 16 10 02 04 01 00 00 10 03
>
> The next message will increment the 5th byte value by one thus giving:
> 16 10 02 04 02 00 00 10 03
>
> Oddly enough if the value coming to the serial port from the radio is 1D 
> (binary value 00011101), Gambas seems to see that value as 1A (binary 
> value 00011010).
> Every other input is working perfectly... and there is absolute 
> certainty that the incoming byte value is indeed 1D. Also, the outbound 
> side is ok... if I reply to the radio as if it had sent a 1D with the 
> appropriate CRC16 checksum everything is happy. Could this be a small 
> error in the serial code (gb.Net) that someone has encountered or rather 
> a known issue elsewhere which I have not yet found in my searches?
>
> Thanks,
>
> Anthony
>   
We've discussed that about one month ago. It is about a flag that must
be set/cleared. The thread can be found in the archive.

Regards
Werner