PEP Modular Computers Modular Computers RS485 - Smdad1 Putv

SMART I/O User’s Manual
March 12, 1996
©1996 PEP Modular Computers GmbH
Page 5 - 22
Chapter 5 Analog Modules
5.1.8.7 SMDAD1PutV
Syntax
error_code SMDAD1PutV(u_int8 PortNr, u_int8 Channel,
int16 Value);
Description
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.
Input
u_int8 PortNr SM-Port number to be accessed
u_int8 Channel Number of the DAC output channel to access
(0-1)
int16 Value Value to be written
Output
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).
Example
RetVal = SMDAD1PutV(0, 1, 0x7FF);
Value (16-bit HEX)
Unipolar Bipolar
Positive Full-Scale $0FFF Positive Full-Scale $07FF
+1LSB $0001 +1LSB $0001
0 $0000 0 $0000
-1LSB $FFFF
Negative Full-Scale $F800