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Old 10-29-2003, 07:34 PM   #1
Registered: Aug 2003
Location: Texas
Distribution: Fedora Core 2
Posts: 71

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Serial Port Question...

All, I'm trying to sync a Handspring Treo 90 Palm device with my Linux System. I gave up on USB (because of a driver bug with sequential access devices) and switched to a serial cable. My problem is, I can't determine which serial port is activated when I launch the hotsync process on the device. Does anyone know how to tell which port is activated?
Old 10-30-2003, 04:09 AM   #2
Registered: Oct 2003
Location: Long Island, N.Y., U.S.A
Distribution: Gentoo, Slackware
Posts: 79

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If the serial port is being used a serial interrupt will register in /proc/interrupts. You can check that file repeatedly with: watch cat /proc/interrupts. If it doesn't appear then you're not actually communicating through the serial port. If it does appear during the hotsync note the IRQ. IRQ 4 is usually COM1 (/dev/ttyS0), IRQ 3 is usually COM2 (/dev/ttyS0).


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