[fpc-pascal] One experience with the unit serial
Gustavo Enrique Jimenez
gejimenez at gmail.com
Thu Nov 19 15:25:21 CET 2009
2009/11/19 Holger Bruns <holger.bruns at gmx.net>:
> Gustavo Enrique Jimenez schrieb:
>>> Thank you for your answer. I played with different baud rates. The sender
>>> delivers a stream of bytes. The faster a transmission rate is, the less
>>> amount of data can be received. This leds me to two conclusions: At
>>> there must be a queue for incoming data despite I ruled out a queue with
>>> inbuffer with the length 1. Secondly, a timeout error appeared, the
>>> gave up. For now, I try to solve this problem with slower baud rates.
>>> iopl is still not available to fpc in its 64-bit-version, I should move
>>> to c
>>> for future port programming.
>> Despite queues an baud rates, you must expect data loss. You will
>> loss data in the physical layer. You have to implement some handshake
>> to prevent it. (using google translator, excuse my english).
> Which can be done through a direct port access and some lines of code in
> assembler language. The second idea I have is the use of the device files
> /dev/ttySx, but how can these files be used to get access to all of the
> registers of an uart?
Did you try Synaser? http://www.ararat.cz/synapse/doku.php/download .
I use it on all my projects since 2006 without problems (linux,
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