Lpt Commands For Math Operations; Kfpabs; Kfpadd - Keithley 4200A-SCS Reference Manual

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Model 4200A-SCS Parameter Analyzer Reference Manual

LPT commands for math operations

The following commands provide math operations.

This command takes a user-specified positive or negative value and converts it into a positive value that is

returned to a specified variable.

int kfpabs(double *x, double *z);

double ares2, vb1;

forcev(SMU1, vb1);/* Output vb1 from SMU1. */

measi(SMU1, &ares2);/* Measure SMU1 current; */

/* store in ares2. */

kfpabs(&ares2, &ares2);/* Convert ares2 to absolute */

/* value; return result to ares2*/

This example takes the absolute value of a current reading. forcev outputs vb1 volts from SMU1. This

current is measured with measi, and the result is stored in location ares2. The absolute value of ares2 is

then calculated and stored as ares2.

This command adds two real numbers and stores the result in a specified variable.

int kfpadd(double *x, double *y, double *z);

The values referenced by x and y are summed and the result is stored in the location pointed to by z.

If an overflow occurs, the result is ±Inf. If an underflow occurs, the result is zero (0).

4200A-901-01 Rev. C / February 2017

Pointer to the variable to be converted to an absolute value

Pointer to the variable where the result is stored

The first of two values to add

The second of two values to add

A variable in which the sum x + y is stored

Section 13: LPT library function reference