RE: [ECOS] Using the second serial port on ARM-E7T

RE: [ECOS] Using the second serial port on ARM-E7T

[Ravi Kumar B S]

How to use the second serial port on ARM-E7T.
On the card, this port is named COM0 or USER.
What to change in the ecos configuration ?
How to open it :
I tried something like :
fp = fopen("/dev/ser0", "rw");
...
fprintf(fp, "hello\n");
...

without success.
Thank you for your help.
>

to use the second serial port you have to have the serial driver.
which is not there in the current release.

regards,

/Ravi

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Re: [ECOS] Using the second serial port on ARM-E7T

[Jonathan Larmour]

Ravi Kumar B S wrote:
> 
> How to use the second serial port on ARM-E7T.
> On the card, this port is named COM0 or USER.
> What to change in the ecos configuration ?
> How to open it :
> I tried something like :
> fp = fopen("/dev/ser0", "rw");
> ...
> fprintf(fp, "hello\n");
> ...
> 
> without success.
> Thank you for your help.
> >
> 
> to use the second serial port you have to have the serial driver.
> which is not there in the current release.

It should be! It was contributed by Lars Lindqvist from Combitech. Whether
it works or not I don't know though :-).

http://sources.redhat.com/cgi-bin/cvsweb.cgi/ecos/packages/devs/serial/arm/e7t/current/?cvsroot=ecos

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine

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Re: [ECOS] Using the second serial port on ARM-E7T

[Jonathan Larmour]

Jacques Ehrlich wrote:
> 
> >I tried something like :
> > fp = fopen("/dev/ser0", "rw");
> > ...
> > fprintf(fp, "hello\n");
> > ...
> >
> > without success.
> 
> Finally, it works !
> The error was :
> fp = fopen("/dev/ser0", "rw")
> 
> To be ok you must open two different "files":
> out = fopen("/dev/ser0", "w")
> in = fopen("/dev/ser0", "r")

Actually that shouldn't be required. But you saying this has made me notice
what the problem is: it shouldn't be "rw", it should be "r+" to open for
reading and writing.

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine

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Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
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RE: [ECOS] Using the second serial port on ARM-E7T

[Jacques Ehrlich]

>I tried something like :
> fp = fopen("/dev/ser0", "rw");
> ...
> fprintf(fp, "hello\n");
> ...
>
> without success.

Finally, it works !
The error was :
fp = fopen("/dev/ser0", "rw")

To be ok you must open two different "files":
out = fopen("/dev/ser0", "w")
in = fopen("/dev/ser0", "r")

--
Jacques Ehrlich | LIVIC (INRETS-LCPC) |
http://www.lcpc.fr
Laboratoire sur les Interactions Véhicules, Infrastructure, Conducteurs
tel:33(0)1 4043 2903 | fax:33(0)1 4043 2930 | mob:33(0)6 6336 9499
---



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RE: [ECOS] Using the second serial port on ARM-E7T

[Ravi Kumar B S]

Ravi Kumar B S wrote:
> 
> How to use the second serial port on ARM-E7T.
> On the card, this port is named COM0 or USER.
> What to change in the ecos configuration ?
> How to open it :
> I tried something like :
> fp = fopen("/dev/ser0", "rw");
> ...
> fprintf(fp, "hello\n");
> ...
> 
> without success.
> Thank you for your help.
> >
> 
> to use the second serial port you have to have the serial driver.
> which is not there in the current release.

It should be! It was contributed by Lars Lindqvist from Combitech. Whether
it works or not I don't know though :-).

http://sources.redhat.com/cgi-bin/cvsweb.cgi/ecos/packages/devs/serial/arm/e7
t/current/?cvsroot=ecos

>

perhaps i have some old source archive. Infact i got the code from 
Jonathan Larmour and used it. it works fine except that non blocking read
does not work.
It is stable. but you can not transmit data at very high rate. at times there
is data loss.

hope this helps.


/Ravi

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[ECOS] Using the second serial port on ARM-E7T

[Jacques Ehrlich]

Hi !
How to use the second serial port on ARM-E7T.
On the card, this port is named COM0 or USER.
What to change in the ecos configuration ?
How to open it :
I tried something like :
fp = fopen("/dev/ser0", "rw");
...
fprintf(fp, "hello\n");
...

without success.
Thank you for your help.
--
Jacques Ehrlich | LIVIC (INRETS-LCPC) |
http://www.lcpc.fr
Laboratoire sur les Interactions Véhicules, Infrastructure, Conducteurs
tel:33(0)1 4043 2903 | fax:33(0)1 4043 2930 | mob:33(0)6 6336 9499
---



-- 
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss