Messages in this thread | | | Date | Thu, 2 May 2002 10:34:00 -0400 (EDT) | From | "Richard B. Johnson" <> | Subject | Re: Controlling the serial port at kernel level |
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On Thu, 2 May 2002, antonelloderosa@inwind.it wrote:
> Hallo, > I would find the way of controlling the serial port at kernel > level; more precisely I want to set the DTR or RTS pin of the serial > port whenever my host send or receive an udp packet. > > Can you help me? > > Please answer me as soon as possible!!! > > Thanks a lot !!
If this is just a hack and you don't care if it screws up somebody else using the UART, just....
#define BASE 0x3f8 // For first UART #define MCR 0x3fc #define DTR 0x01 #define RTS 0x02
... read/write directly to the MCR port, saving the bits you don't want to change... You use the outb(value, port); and inb(port); instructions for ports.
Cheers, Dick Johnson
Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips).
Windows-2000/Professional isn't.
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