[ts-7000] RS485HD on the TS-7800

["James Bridson" <>]

I'm migrating from a TS-7250 to a TS-7800 and am using RS485 in half
duplex mode. Does anyone have an example of successfully configuring
COM2 for RS485HD activity on the TS-7800? I've tried to configure the
TS-USART using the AUTO485HD ioctl call (TIOC_SBC485) but this seems to
be unsupported in the TS-7800 port at the moment. I've also tried poking
the registers directly based Michaels draft documentation (ts7800.html)
but I cannot seem to get any data out!

I tried:

1. Opening /dev/ttyS1 (for COM2);
2. Setting baud rate etc.;
3. Clearing 0xe800000c top bit (bit 15) to zero to set RS485 mode;
4. Looking for signal on pins 4 (+) and 9 (-) ...

What confuses me a little is that the table in Michael's document shows
two sets of registers for COM2. Should I be using a different device?

Thanks for any advice

James


 
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