[ts-7000] SLIP over RS-422 on TS-SER4 not working

["ronmuzzi" <>]

Has anyone done this successfully?

I'm trying to run SLIP over an RS-422 line at 115200 baud using a port on the 
TS-SER4 board and the TS-7260 linux board.

The 2.4.26-ts11 kernel is recompiled to support 12 com ports and the SLIP 
drivers.

The TS-SER4 board contains the RS-422 drivers and is jumpered for RS-422 
operation.  I also run peekpoke 8 0x11e00237 0x80 to enable RS-422 operation.  
I have two systems connected with a special RS-422 crossover cable.  When 
testing RS-232 connections, I use an RS-232 null modem cable and configure the 
board for RS-232 operation.

Here's what works and what doesn't (using the TS-SER4 COM-D port on both ends):

1. Running picocom and RS-232 communications works OK.  I can communicate in 
both directions.

1. Running picocom and RS-422 communications works OK.  I can communicate in 
both directions.

2. Running SLIP (slattach) and RS-232 communications works OK.  I can configure 
sl0 and transfer ethernet packets in both directions.

3. Running SLIP (slattach) and RS-422 communications does not work!!  I can 
configure sl0, but there is no transfer of ethernet packets over the line!

Something must be different in the way that picocom and slattach access the 
port, but I have no idea what.

Any help or ideas would be appreciated!

Thanks,
Ron




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