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Old 06-19-2009, 07:53 PM   #1
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Location: Oxford, Mich, USA
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XScale PCIe RS-232 board - unable to use? - CentOS 5.3

I have a XScale PCIe RS-232 board running in a home built quad core w/ 8GB ram that I want to use to either communicate with a UPS or a RS-232 embedded device.

The relevant sections of the output of dmasg are;
dmesg |grep ttyS
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
00:07: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
0000:04:01.0: ttyS1 at I/O 0xd000 (irq = 177) is a XScale
0000:04:01.0: ttyS2 at I/O 0xd100 (irq = 177) is a XScale

When I try to communicate on ttyS0 (built into the motherboard) anything I plug in runs fine, but when I plug them into the card, (ttyS1 or ttyS2) nothing works.

--- OK, Slight update. It seems that one of the updates I did caused an test script I have working to - sort of work. I get the test text string - mostly, I also get some scrap along with it. outputs of;
[root@hawaii ~]# stty < /dev/ttyS0
speed 9600 baud; line = 0;
-brkint -imaxbel
[root@hawaii ~]# stty < /dev/ttyS1
speed 9600 baud; line = 0;
-brkint -imaxbel
[root@hawaii ~]# stty < /dev/ttyS2
speed 9600 baud; line = 0;
-brkint -imaxbel

Any ideas you would choose to share?

Thank you.


Last edited by PaulGraham; 06-20-2009 at 01:03 AM. Reason: new testing....
Old 06-20-2009, 03:47 PM   #2
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data for ttyS0 looks good. ttyS1 anhd ttyS2 are weird - irq 177!! Really.
likewise the address should be lower 0x0278 or oxo2f8 - something like that.

try setserial

man setserial and have fun that way. pPerhaps a line in rc.local for each port.

Last edited by business_kid; 06-20-2009 at 03:48 PM. Reason: typo


centos, pcie, rs232

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