Experimental Physics and Industrial Control System
Hello everyone,
I am using the stream device to gat data from a device, and have a problem about format conbersion. I hope to get some advice and will appreciate for your help.
I want to send data, such as "09", in hexademical format to the device. the device will return a float data %f.
Statements in the db file:
recorrd(ai, "$(P)$(R)read")
{
field(DESC, "read pressure")
field(DTYP, "stream")
field(INP, "@pressure.proto SendCommand(09) $(PORT)")
field(SCAN, "1 second")
}
Statements in the protocol file is like this:
SendCommand{
out "\x\$1";
in "%f";
}
when I run the st.cmd, an error occurs:
Hex digit expected after \x: "\X""
if "09" is send directly, not as a variable "\$1":
SendCommand{
out "\x09";
in "%f";
}
everything goes well and I can get the returned %f correctly.
I wonder how can I send "09" as a variable? How to change a variable in the record to be hexadecimal?
Thank you very much for any advice, I will try it and give feedback.
Bset wishes
Chunxia Yin
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