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Re: Serial Port [message #14226 is a reply to message #14133]

Fri, 29 January 1999 00:00

ashmall
Messages: 14
Registered: October 1998

Junior Member

Apologies for following up to my article but...

If you're not reading a fixed amount of bytes from the port, to terminate the
transmission I think you have to send byte value 4, something like:

get_lun, u
openw, u, "COM1:"
text = "Hello Mum"
writeu, u, text + string(4b)
close, u
free_lun, u

Justin

In article <78s43i$pec$1@jura.cc.ic.ac.uk>, ashmall@my-dejanews.com (Justin
Ashmall) wrote:
> We've done this under NT4. We just open a file as normal with OPENR or OPENW
> (for reading or writing to the port), but in the place of the file name use
> COM1: or COM2: (not forgetting the colons). The only problem is if you try to
> read from the port and it gets no data - it either hangs or has a very long
> time out.
> If you're having trouble email me at justin@ic.ac.uk and I'll dig out the
> code for you.
>
> Justin
>
>
> In article <36B0B2B5.1C0A2FB7@va.aetc.com>, bpuc@va.aetc.com wrote:
>> Is there anybody who has written any IDL code to access the serial
>> port on a PC or UNIX platform? I'd be interested in seeing
>> implementations.
>> Thanks.
>>
>>

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[Message index]

		Serial Port By: Bernard Puc on Thu, 28 January 1999 00:00
		Re: Serial Port By: ashmall on Fri, 29 January 1999 00:00
		Re: Serial Port By: ashmall on Fri, 29 January 1999 00:00
		Re: serial port By: David Fanning on Tue, 03 August 2004 05:50
		Re: serial port By: gnarloo on Tue, 03 August 2004 05:24
		Re: serial port By: Rick Towler on Mon, 02 August 2004 13:54
		Re: serial port By: David Fanning on Mon, 02 August 2004 12:58
		Re: serial port By: btt on Mon, 02 August 2004 12:41
		Re: serial port By: gnarloo on Mon, 02 August 2004 11:00
		Re: serial port By: David Fanning on Mon, 02 August 2004 07:50
		Re: Serial Port By: Haje Korth on Tue, 30 November 2004 15:04

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