Hi Ole --
--- In "happy_plattler" <>
wrote:
>
>
> I have this nice little all-in-one machine TS-7390 from Technologic
> Systems which has4 RS-232, 2 TTL COM ports. Now I am not an engineer
> rather a user. Here is my silly question:
You may have a steep learning curve, these boards are not aimed at end
users, but rather developers & engineers that further customize them.
>
> How can I connect some serial devices e.g. printer/etc. to this
> machine?
Seems the TS-7390 isn't too well documented. Looking at the
schematic, COM1 header carries signals for the UART1 serial ports at
RS-232 level. I believe other pins on COM1 header can either serve as
the modem control / flow control signals of UART1, or as Tx/Rx of two
other RS-232 ports, depending on how the port is opened in linux.
TS website also clearly states that a TS-9445 card is needed for the
serial console to be used. Do you have that?
>
> I have started my system from the supplied SD card (I did not change
> anything but the IP address).
>
> Now I see there is a COM1 and COM2 right next to the eth1 port. With
> the supplied connectors when I try to output some text nothing
> happens, e.g.
How, and what, are you connecting to COM1?
>
> Problem1:
> cat sample.txt > /dev/cua0
> cat sample.txt > /dev/cua1
I don't think /dev/cua? device nodes have been used since about 1998.
My guess is they don't exist on your system.
>
> Problem2:
> If I do the same for /dev/ttyS0 or ttyS1 I get a "write:
> Input/output error"
Do the devices exist? I don't think the ttyS? devices exist for the
TS-7390, except maybe ttyS0 when you have a serial console. The TS
driver module works through devices /dev/ttzn, where 'n' is 0-3. Try
'ls -l /dev/ttyz?'
Is the module loaded? (I think it is xuart-something, try 'lsmod |
grep -i xuart').
Also, check your cables & device, looking at the TS-7390 schematic on
the TS website. COM1 & COM2 headers are at the top of page 4.
>
> Now the console output with the supplied board on the JGAT portion
> of the 40 PIN JGAT/DIO works.
OK, I guess this is the TS-9445 board I mentioned above.
>
> Problem3:
> How and where would I connect the remaining connectors? It says: The
> remaining COM ports are provided by the FPGA through the proprietary
> TS-UART core and are 9-bit serial capable. I know that there are
> some drivers for the TS-UART and I am guessing I will have to create
> the devices ttys.. Am I right here? I hope that I can connect the
> devices without having to put some board in-between like the console
> board or am I wrong here?
See above. It looks to me (from the schematic) that you can have (4)
ports at RS-232 signal levels, as long as you don't need any hardware
flow control or modem flow control. There is some (very little)
documentation on the TS-7350 UART at (near the bottom):
http://www.embeddedarm.com/about/resource.php?item=371
Look that over, and note that the device numbers don't really
correspond to header numbers. IE, ttyz0 corresponds to COM2 header
pin 3 (TxD) and pin 2 (RxD).
regards, ......... Charlie
>
> Some guidance would be very much appreciated.
>
> Thank you,
>
> Ole
>
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