VXi VT1529A/B 사용자 설명서

This section discusses how to use the ALG:DEFINE command to define 
algorithms. Later sections will discuss "what to define."

While the following discussion of algorithm definition is useful for 
plug&play users with regards to the coding of an algorithm or global 
variable definition, generating an algorithm code and actually downloading 
it to the VT1422A is much easier because of the plug&play hps1422.exe 
Soft Front Panel program and hpe1422_downloadAlg(...) plug&play driver 
function.

Using the SFP "Algorithm Panel," an algorithm can be created and tested 
and then stored to a file. The hpe1422_downloadAlg(...) plug&play driver 
function was created specifically to download algorithms from files into the 
VT1422A as part of the application program.

*RST erases all previously defined algorithms. All algorithms must be 
erased before beginning to re-define them (except in the special case 
described in "Changing a Running Algorithm" on page 197 later in this 
section).

The ALG:DEFINE '<alg_name>','<source_code>' command sends an 
algorithm's source code to the VT1422A's driver for translation to 
executable code. The <source_code> parameter can be sent in one of two 
forms:

1. SCPI Quoted String: For short segments (single lines) of code, 

enclose the code string within single (apostrophes) or double quotes. 
Because of string length limitations within SCPI and some 
programming platforms, it is recommend that the quoted string length 
not exceed a single program line. Example:

ALG:DEF 'ALG1','if(First_loop) O108=0; O108=O108+.01;'

2. SCPI Indefinite Length Block Program Data: This form terminates 

the data transfer when it receives an End Identifier with the last data 
byte. Use this form only when it is certain that the controller platform 
will include the End Identifier. If it is not included, the ALG:DEF 
command will "swallow" whatever data follows the algorithm code. 
The syntax for this parameter type is:

#0<data byte(s)><null byte with End Identifier>

Example from "Quoted String" above:
ALG:DEF  'ALG1',#0O108=I100;

∅     (where "∅" is a null byte)