Serial Port Bug?

[Karl Larsen]

Tod Merley wrote:
> On Nov 27, 2007 7:48 AM, Karl Larsen <k5di at zianet.com> wrote:
>   
>>     I have a software I like to use called gmfsk which uses the serial
>> port to turn on and off the transmitter in my radio. It worked fine on
>> my old computer. Now when I try to run gmfsk it puts up an error panel
>> that says "Not a serial or parallel port". This made me think the new
>> computer which has a serial port that is not working.
>>
>>     With a volt meter I find some pins have a constant -10.7 volts on
>> them which is the standard RS-232 for a no-data signal. In this static
>> measure the voltmeter sees no positive volts near +12 volts.
>>
>>     Wanting a way to test the serial port I recalled minicom and after
>> getting it set up on /dev/ttyS0 it seems happy with Com 1. The old
>> /dev/modem is gone on F7. But now what is a way to drive the serial port
>> pins to a constant plus voltage with minicom?
>>
>>     I have a scope that I can use if there are no way to make a constant
>> positive voltage. My fear is that the serial port is broken and can't
>> make a positive voltage.
>>
>>
>>
>> --
>>
>>         Karl F. Larsen, AKA K5DI
>>         Linux User
>>         #450462   http://counter.li.org.
>>
>> --
>> fedora-list mailing list
>> fedora-list at redhat.com
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>>
>>     
>
> Hi Karl F. Larsen!
>
> What I like to do with dmesg is #dmesg > dmesg.txt and then call - say
> Abiword to actually paw through the file.  Searching in Abiword for
> "serial" I found these three lines together:
>
> Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
> pnp: Device 00:0c activated.
> 00:0c: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
>
> Looking a bit at the SW you like to use I see that it uses hamlib to
> control the rig.  The error message may well indicate that the hamlib
> you have compiled talks to a port whose SW interface (e.g. - at I/O
> 0x3f8 (irq = 4)) ls located elseware..
>
> That is my guess.
>
> Good Hunting!
>
> Tod
>
>   
    Hi Tod all I get is this:

Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled

Nothing about being set up in dmesg. It appears the kernel correctly 
sees the driver. But for some reason it is not turned on.



-- 

	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.