Experimental Physics and
Industrial Control System

Emmanuel Mayssat <[email protected]> · Wed, 31 Oct 2007 13:25:53 -0700

Eric,

Are you saying that you were able to compile epics/asyn/etc on Linux and
on your gumstix?

--
E

On Wed, 2007-10-31 at 09:14 -0400, Eric Berryman wrote:
> Hello,
> 
> For those that would be interested, here is one solution to using the
> asyn driver and a non-standard baud rate on a pxa255 (gumstix).  (If
> you also can't get setserial to work without too much effort)
> 
> First, configure the port for some standard baud rate in your st.cmd:
> 
> drvAsynSerialPortConfigure ("SRRGA","/dev/ttyS2", 0, 0, 0)
> asynSetOption ("SRRGA", 0, "baud", "38400")
> asynSetOption ("SRRGA", 0, "bits", "8")
> asynSetOption ("SRRGA", 0, "parity", "none")
> asynSetOption ("SRRGA", 0, "stop", "2")
> asynSetOption ("SRRGA", 0, "clocal", "Y")
> asynSetOption ("SRRGA", 0, "crtscts", "N")
> 
> Then poke the divisor registers for your baud rate:
> 
> ## For PXA arch to set 28800 baud rate
> ## Set DLAB bit to 1 to access DLL and DLH bits
> system("/root/pxaregs STLCR 0x87")
> 
> ## Set Divisor to 32 for 28800 baud rate
> system("/root/pxaregs STDLL 0x20")
> system("/root/pxaregs STDLH 0")
> 
> ## Set DLAB bit to 0 with 8 bit, no parity, 2 stop bit
> system("/root/pxaregs STLCR 0x07")

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System