Experimental Physics and
Industrial Control System

Hi,

 

I’ve had a brief look at this – there doesn’t seem to be an  in_dll()  method on Arrays in IronPython, but I was able to work around it using:

 

    c_short_p = ctypes.POINTER(ctypes.c_short)

    value_offset0 = ctypes.c_short.in_dll(libca,'dbr_value_offset')

    dbr.value_offset = ctypes.cast(ctypes.addressof(value_offset0), (39*ctypes.c_short))

 

IronPython also looks to be a little more fussy about having types specified in function calls – so in the PyEpics call to   libca.ca_create_channel    I had to change    pvn    to    ctypes.c_char_p(pvn)     as otherwise only the first character of the PV name seemed to get passed into ca.dll   I suspect there may be a few other places where similar changes might be needed too as it’s not quite working yet. I’ve some time later next week when I could take a more detailed look with a debugger if that’s not too late for you.