1 

     2 

     3 #How TPG26x comms work:

     4 #First send a command (e.g. ask for the pressure) then the device will return ACK.

     5 #Then send ENQ to get the actual values.

     6 

     7 #According to the streamdevice manual, once an "out" is sent access to the

     8 #device is exclusively locked until the WHOLE protocol is finished.

     9 #This should mean that we do not need to worry about commands interrupting each other

    10 

    11 LockTimeout = 2500;

    12 ReplyTimeout = 2000;

    13 ReadTimeout = 100;

    14 OutTerminator = CR;

    15 InTerminator = CR LF;

    16 

    17 # Reset communication 

    18 reset {

    19     out "RES,1";

    20     in ACK;

    21 	out ENQ;

    22     in "%s";

    23 }

    24 

    25 # Get pressures (and errors) from both guages

    26 pres {

    27     out "PRX";

    28     in ACK;

    29 	out ENQ;

    30     in "%(\$1\$2)d,%f,%(\$1\$3)d,%(\$1\$4)f";

    31 }

    32 

    33 # Get the current units

    34 getUnits {

    35     out "UNI";

    36 	in ACK;

    37 	out ENQ;

    38     in "%{0|1|2}";

    39 }

    40 

    41 # Set the current units

    42 setUnits {

    43     #UNI,0 = mbar

    44     #UNI,1 = Torr

    45     #UNI,2 = Pa

    46     out "UNI,%{0|1|2}";

    47 	in ACK;

    48 	out ENQ;

    49     in "%{0|1|2}";

    50 }