Re: Serial port question

On Wednesday 30 January 2008 21:42:28 you wrote:
On Wed, 30 Jan 2008, Mario Lobo wrote:
I am doing some experiments with the WL5460AP. I doesn't have a serial
connector but the RTL8186 does have a UART and the circuit board has a 4
pin connector (4-3.3V, 3-TXD, 2-RXD, 1-GND) to the UART. The idea here is
to rewrite its firmware.

You may have to swap TXD and RXD (null-modem).

I tried that.


For a better debuging (and possibly de-bricking), I need to access its
console screen (which it DOES have).

The (lots of) info I gathered says that the connection to the WL5460AP
console should be at 38400, 8N1, no-flow ctl.

I have set up a proper cable and a line in /etc/ttys like:
ttyd0 "/usr/libexec/getty 3wire.38400" vt100 on secure

I would set that back to default. /dev/cuad0 is the callout port.

I'll try that.


Using kermit I type:

SET CARRIER-WATCH OFF
set duplex full
set session-log binary
set modem type none
set line /dev/ttyd0
set speed 38400
set flow none
set serial 8n1
set terminal echo local
set terminal newline-mode on
set terminal debug on
connect

but I get nothing back.

Try again with /dev/cuad0. Again, you may have to reverse TXD and RXD
at one end of the cable.

ok


Before I start digging for hardware errors, I want to check if my
connection attempt is being done right and understand better what is
going on.

1) how does this work? ttyd0 goes "through" cuad0 or does it simply
"grabs it" and sets its speed to 38400. Originally, cuad0 is set to 9600.

See sio(4). ttyd0 is a "callin" port, while cuad0 is a "callout" port.

2) if it goes "through" cuad0, how do I set it to 38400, 8N1, no-flow
ctl?

You're telling kermit to set the speed and flow control. For this
application, you could probably use cu/tip also:

cu -l /dev/cuad0 -s 38400

I tried that. It says "connected" and hangs. I have to open another console to
kill -9 it


3) is my ttys line correct?

I don't think so.

-Warren Block * Rapid City, South Dakota USA

Warren, I found this discussion on the inet.

Could you comment on it?

http://fixunix.com/bsd/86444-serial-ports-control-peripherals-w-3-wire-interface-okay-5-x-isn-t-working-6-x.html

Maybe my plans to access the serial port will have to wait.

I know my cuad0 is ok because I can fax with an external Genius modem.

Thanks for replying !


--
Mario Lobo
http://www.mallavoodoo.com.br
FreeBSD since version 2.2.8 [not Pro-Audio.... YET!!] (99,7% winedows FREE)
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