Pepper Computer Modular Computers RS232 User Manual

SMART I/O User’s Manual

©1996 PEP Modular Computers GmbH

October 01, 1996

Page 5 - 119

Chapter 5  Analog Modules

error_code SMDAC1PutV(u_int8 PortNr, u_int8 Channel,

      int16 Value);

This function sets the selected DAC channel to the chosen value. A gain and

offset correction is performed with the use of the automatically selected

conversion table depending whether a user-defined table has been specified

or not. Hence, if a user-defined table exists then this will be used, otherwise

the default factory set table will be used.

u_int8 PortNr

SM-Port number to be accessed

u_int8 Channel

Number of the DAC output channel to access

(0-5)

int16 Value

Value to be written

error_code

SUCCESS

E_SEEK

if module was not initialized

E-BMODE

if the module is unknown

or standard OS-9 error code (refer to the OS-9

Technical Manual Error Codes Section).

RetVal = SMDAC1PutV(0, 1, 0x0FFF);

Positive Full-Scale

$0FFF

Positive Full-Scale

$07FF

+1LSB

$0001

+1LSB

$0001

0

$0000

0

$0000

  

-1LSB

$FFFF

Negative Full-Scale

$F800