Re: rs485 on SBC84500

From: Grant Edwards (grante_at_visi.com)
Date: 06/18/05 

Date: Sat, 18 Jun 2005 13:14:34 -0000

On 2005-06-18, Frencia <jean.pierre.frencia@wanadoo.fr> wrote:

> I'm trying to use the RS485/COM2 port on an embedded Axiom
> SBC84500 card running kernel 2.4.26. I have configured the
> JP9,JP10,JP10 according to the documentation but there is no
> output signal when writing to /dev/ttyS1.

You might have to assert RTS in order to enable the RS-485
drivers.

> I read somewhere that I should use ioctls to write to the port
> instead of the standard write function.

I really doubt that. I've been doing serial stuff under Unix
for 15 years, and I've never heard of using ioctl() to write
data to a serial port. 

-- 
Grant Edwards                   grante             Yow!  Yow! I'm having a
                                  at               quadraphonic sensation
                               visi.com            of two winos alone in a
                                                   steel mill!

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