This is probably the most common issue that people have first using the
TS72xx, and I had the same problem myself.
The issue is that it is configured to allow a serial terminal on both
ttyAM0 and ttyAM1, and the tty will fight for control with anything else
using serial. Go into /etc/inittab, and find the lines that launche
/sbin/getty and comment out the one using the serial port you want to
use. Note that of course if you comment out both, you'll make it very
difficult to use the serial console to the board! Then reboot, and you
should be up and running...
--Andy Gryc
>Hello all from New Zealand,
>
>I have purchased a TS-7200 which I want to use as a data logger for a
>weather station (via serial).
>
>I'm a relative Linux newbie and I'm trying to get the TS-SER1 serial
>port working. After reading the post
>http://groups.yahoo.com/group/ts-7000/message/597 I have done the
>following
>
>Connected a RC-DB9 cable to the TS-SER1 with the red strip against the
>white dot.
>
>I have set the jumpers on the TS-SER1 to IRQ6 and COM3.
>
>At power on time I see
>
>Off-board serial at: COM3
>
>and in the dmesg I see
>
>ttyAM0 at MMIO 0x808c0000 (irq = 52) is a AMBA
>ttyAM1 at MMIO 0x808d0000 (irq = 54) is a AMBA
>ttyAM2 at MMIO 0x808e0000 (irq = 55) is a AMBA
>pty: 1024 Unix98 ptys configured
>Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ
>enabled
>ttyS02 at 0x89c003e8 (irq = 40) is a 16550A
>
>I have used setserial to change the irq to 33, and a display shows the
>following
>
>$ setserial -a /dev/tts/2
>/dev/tts/2, Line 2, UART: 16550A, Port: 0x89c003e8, IRQ: 33
> Baud_base: 115200, close_delay: 50, divisor: 0
> closing_wait: 3000
> Flags: spd_normal skip_test
>
>However, if I try to use the port, it opens alright, but I cant read
>or write from it.
>
>My test involves connecting COM2 on the TS-7200 to a PC running
>hyperterm, and copying some test to it via "cp test.txt /dev/ttyAM1".
>My test file appears on the screen. I then swap to the COM3 port on
>the TS-7200 and change the command to "cp test.txt /dev/ttyAM2".
>Nothing appears on the screen.
>
>My second test involved writing a short program to write some test to
>the port. The result is the same, it works on COM2, but not on COM3
>
>What am I missing?
>
>Kind regards
>Andrew
>
>
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