OESF Portables Forum

Everything Else => Zaurus - Everything Development => Distros, Development, and Model Specific Forums => Archived Forums => OpenZaurus/Opie/Qtopia => Topic started by: ProfessorOhki on December 06, 2005, 12:53:31 am

Title: De-asserting Dtr
Post by: ProfessorOhki on December 06, 2005, 12:53:31 am

I'm trying to get my Zaurus SL6000 to be able to communicate in a very basic way with a micro controller I have (with a ZThinCable).  I'd like to move up to writing my own apps that can use it later... but thats a different story.

So, anyways, the microcontroler is set to put out a continious stream of 123123123123123.  This shows up fine in serial-monitors for windows.  The problem I've run into: I can figure out how to de-assert DTR in linux.  DTR resets the microcontroler, so having DTR asserted hangs it in a loop.  I know I have the right port however.  I made it so a light on the microcontroller is on when running, and off while being reset.  The moment I  

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cat /dev/ttyS0 the light turns off and the console just hangs there.  No input because the device is constantly resetting.  However, if I open a second terminal and

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killall cat the light comes back on.  I've done some googling, and most sites say that I need to set

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stty -dtrxoff but, the stty on my Z doesnt recognize that as a valid argument.  Help?

Title: De-asserting Dtr
Post by: guylhem on December 09, 2005, 11:07:45 am

I'd suggest looking at the kernel serial_pxa200 driver and cutting it directly there. It can also work as a module.