Subject:
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Re: Serial line interrupt
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 6 Jul 1998 23:10:43 GMT
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Original-From:
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Remi Desrosiers <harlock@videotron.ca=StopSpammers=>
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Viewed:
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1138 times
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At 18:29 7/6/98 +0200, you wrote:
> Hello all,
>
> I'm currently trying to communicate between the Handy Board and a PC (i486)
> using the existing serial line between the two. Sending data from the handy
> Board to the PC is no problem. An interrupt handler puts all incoming serial
> data into a buffer, which the main program can read from.
>
> Sending data from the PC to the Handy Board is another story. The serial
> routines on http://www.ai.mit.edu/people/rsargent/ic/serialio.html work
> fine if
> the PC isn't sending very fast. The current 'solution' is to put the PC in a
> short loop after it has sent a character to slow it down. But that's not a
> very
> elegant solution.
>
> Is there a way to use the same technique on the handy Board as on the PC
> (using
> an interrupt handler)? If so, has anyone used that approach and is willing • to
> share this code?
>
> If there is a simpler way of doing things, I would also be glad to know • about
> it.
>
> Jan Sipke van der Veen
>
>
> Jose Antonio Barata de Oliveira
> Universidade Nova de Lisboa - Dep. Eng. Electrotecnica
> Quinta da Torre
> P 2825 - Monte da Caparica
> Portugal
>
>
> TF: +351-1-2948535
> FAX: +351-1-2948532
Hi,
you could simply build and Acknowledge routine so that every character sent
by the PC could be echoed back by the HandyBoard. It asks a bit more of
processing time from the HandyBoard, but at least it's simple to build :)
ex:
PC sends 0x56
HB sends back 0xFF then 0x56
(here 0xFF could tell the computer that this is an echoed character)
Or you could lookup how to build a CRC correction scheme and build a kind
of packet with the CRC byte at the end, which would save a lot of
transmission time, but more processing time for the HB.
.-------------------------- . . .
| Remi Desrosiers
| "My Youth in Arcadia" ICQ# 7228856
| harlock@videotron.ca
. remi.desrosiers@polymtl.ca
.
.
|
|
Message is in Reply To:
 | | Serial line interrupt
|
| Hello all, I'm currently trying to communicate between the Handy Board and a PC (i486) using the existing serial line between the two. Sending data from the handy Board to the PC is no problem. An interrupt handler puts all incoming serial data into (...) (26 years ago, 6-Jul-98, to lugnet.robotics.handyboard)
|
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