Program control of RTS/DTR lines?

[Randy]

Originally posted in comm-dev-forum but no answer.

I searched the net/Palm/archives and get conflicting information about
whether you can or can not truely control the RTS line from within a
program. Not have the API do auto-flow control but to drive the RTS line
high or low on my program command.

I've found out that the DTR "is not supported on all hardware" and appears
always high. I;ve found nothing to say which HW actually does support  DTR
control.

I'm particularly interested for the M5xx series.

I've tried various combinations of code (like below) using the new Serial
Mgr lib with an without srmSettingsFlagRTSAutoM bit set but using POSE

(v3.5) and a serial sniffer HW, the RTS line never changes.

void SetRTS(bool setrts)

paramSize = sizeof(flags);

status = SrmControl(port->portId, srmCtlGetFlags, &flags, &paramSize);

if (eSUCCESS == status)

{

if (setrts)

flags |= srmSettingsFlagRTSInactive;

else

flags &= ~srmSettingsFlagRTSInactive;

paramSize = sizeof(flags);

status = SrmControl(port->portId, srmCtlSetFlags, &flags, &paramSize);





Any TRUE information? Should the above code really suppose to set the RTS
line state hi/lo?

Or is some direct MPU peek/poke needed ala L.Marcolina post re' Zire71
(comm-dev-forum).

Thanks







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