minicom questions, need expert
Gene Heskett
gene.heskett at verizon.net
Mon May 12 20:59:15 UTC 2008
On Monday 12 May 2008, Rick Stevens wrote:
>Gene Heskett wrote:
>> Greetings;
>>
>> I'm trying to make an antique computer talk to this linux box via a
>> usb<->serial adaptor and a long USB extension cord that has a hub kit in
>> the far end of it.
>>
>> When I plug in the cable to a 7 port extension hub here, dmesg reports:
>>
>> May 12 14:00:58 coyote kernel: [314986.418050] usb 1-1.3: new full speed
>> USB device using ehci_hcd and address 33 May 12 14:00:58 coyote kernel:
>> [314986.503819] usb 1-1.3: configuration #1 chosen from 1 choice May 12
>> 14:00:58 coyote kernel: [314986.504986] hub 1-1.3:1.0: USB hub found May
>> 12 14:00:58 coyote kernel: [314986.509657] hub 1-1.3:1.0: 4 ports detected
>> May 12 14:00:58 coyote kernel: [314986.818989] usb 1-1.3.4: new full speed
>> USB device using ehci_hcd and address 34 May 12 14:00:58 coyote kernel:
>> [314986.910261] usb 1-1.3.4: configuration #1 chosen from 1 choice May 12
>> 14:00:58 coyote kernel: [314986.910630] ftdi_sio 1-1.3.4:1.0: FTDI USB
>> Serial Device converter detected May 12 14:00:58 coyote kernel:
>> [314986.910684] ftdi_sio: Detected FT232RL May 12 14:00:58 coyote kernel:
>> [314986.910721] usb 1-1.3.4: FTDI USB Serial Device converter now attached
>> to ttyUSB1
>>
>> And I have sent several very long directory listings up the cable, but
>> nothing, not a single character is being output to the minicom screen.
>> I do not know if the minicom utility can reach out into that FT232RL to
>> tell it what the baud rate is or not, no clue. If minicom can't do that,
>> then what linux utility can perform this initialization?
>
>Are you sure minicom is talking to /dev/ttyUSB1? Also note that
>minicom cannot autobaud...you must manually set the baud rate.
>
Once that was set properly on both ends, and I had the coco trained to send
both an lf and a cr, that part is working great Ric.
>If you're connected to another computer's serial port, it's entirely
>possible you need a null modem adapter. Most computers are set up to be
>DCE devices and serial communications requires a DCE<-->DTE connection.
>A null modem adapter converts from DCE to DTE (and vice versa).
>----------------------------------------------------------------------
>- Rick Stevens, Systems Engineer rps2 at nerd.com -
>- Hosting Consulting, Inc. -
>- -
>- Diplomacy: The art of saying "Nice doggy!" until you can find a -
>- big enough rock. -
>----------------------------------------------------------------------
--
Cheers, Gene
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Nearly every complex solution to a programming problem that I
have looked at carefully has turned out to be wrong.
-- Brent Welch
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