Re: serial port hex only

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Re^2: serial port hex only by ccherri (Acolyte) on Apr 26, 2012 at 21:37 UTC
processing it once I get it back in the perl script is not the problem. What I need is bit level control of the serial port within my script. Perhaps win32::serialport is not the way to go...	[reply]
Re^3: serial port hex only by Argel (Prior) on Apr 26, 2012 at 22:04 UTC
Have you looked at Win32API::CommPort? It provides the low level/raw access that Win32::SerialPort is built-upon. It's included with Wn32::SerialPort, so you should already have it. Elda Taluta; Sarks Sark; Ark Arks My deviantART gallery	[reply]
Re^4: serial port hex only by Marshall (Canon) on Apr 27, 2012 at 00:05 UTC
I doubt that this level of control (includes fiddling with control signals like RTS (Request to Send), CLS (Clear to Send), etc is needed. I think all that is needed here is binary data send/receive (not low level access to the flow control signals). A modern computer can keep up easily with the port, even at "high" baud rate settings. Also many of the computers nowadays have very limited RS-232 support and all of the flow control signals may not be even available! xon/xoff flow control is the way to go (if possible and needed) - however even no flow control at all is often fine! The serial port chip or emulator will have at least 16 bytes of buffer. If this is a simple request/response protocol (no asynchronous messages being used), the programming should be fairly straight-forward. RS-232 serial port communication is going the way of the dodo bird although it will "live" and be useful for a very long time.	[reply]
Re^5: serial port hex only by Argel (Prior) on Apr 27, 2012 at 19:34 UTC