Serial Port PCI Card
Alan Secker
# dmesg | grep ttyS
returned this.
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
0000:03:07.0: ttyS1 at I/O 0xe800 (irq = 22) is a XScale
0000:03:07.0: ttyS2 at I/O 0xe480 (irq = 22) is a XScale
The card has two ports. From the above it looks like ttyS1 is not working.
However I cannot tell which socket is which. Is there a convention as to
which will be ttyS0 (COM1) or ttyS1 (COM2) i.e. the upper or lower?
I have serial modem plugged in an it is not responding hence my need to
eliminate the unknowns as Donald Rumsfeld would have said.
--
________________________________________________
Mandriva 2010.2 (Official) for x86_64
Kernel 2.6.33.5-desktop-2mnb
KDE version 4.4.5
Rinning on an AMD 4-core processor
Jasen Betts
> My computer did not have serial port sockets so I purchased a PCI card.
>
> # dmesg | grep ttyS
>
> returned this.
>
> serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> 0000:03:07.0: ttyS1 at I/O 0xe800 (irq = 22) is a XScale
> 0000:03:07.0: ttyS2 at I/O 0xe480 (irq = 22) is a XScale
> The card has two ports. From the above it looks like ttyS1 is not working.
> However I cannot tell which socket is which. Is there a convention as to
> which will be ttyS0 (COM1) or ttyS1 (COM2) i.e. the upper or lower?
Low numbered is usually nearest the PCI connector.
Use baby steps.
Plug a "loopback adaptor" into one of them and try to find it using
minicom or similar. once you get that working you may need to set the
baud clock ratio to something other than what it's set to at the moment
so that the port uses a rate the modem can handle. IIRC "setserial" is
a good tool for that task.
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Thierry Despeyroux
Alan Secker <al...@asandco.co.uk> a écrit :
> My computer did not have serial port sockets so I purchased a PCI
> card.
>
> # dmesg | grep ttyS
>
> returned this.
>
> serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> 0000:03:07.0: ttyS1 at I/O 0xe800 (irq = 22) is a XScale
> 0000:03:07.0: ttyS2 at I/O 0xe480 (irq = 22) is a XScale
>
> The card has two ports. From the above it looks like ttyS1 is not
> working. However I cannot tell which socket is which. Is there a
> convention as to which will be ttyS0 (COM1) or ttyS1 (COM2) i.e. the
> upper or lower?
>
> I have serial modem plugged in an it is not responding hence my need
> to eliminate the unknowns as Donald Rumsfeld would have said.
>
>
>
I did have exactly the same problem. In my case, I discovered that the
new card created ttyS2 and ttyS3.
I suspected that two ports already existed on the board but was not
connected to a plug...
Thierry