Smadcsetprecision - PEP Modular Computers Modular Computers RS485 User Manual

SMART I/O User's Manual

5.2.8.7 SMADCSetPrecision

Syntax
error_code SMADCSetPrecision(u_int8 PortNr, u_int8
Description
This function checks if an SM-PT100 board is fitted on the specified port and
if the channel is valid. It sets the precision of the AD Converter. The valid
precision values are defined in the file smadc.h. Note that large precision/
filter values cause longer AD conversion times.
Input
u_int8 PortNr
u_int8 channel
u_int8 precision
Output
error_code
Example
RetVal = SMADCSetPrecision(0, 1, 0x100);
Page 5 - 44
channel, u_int8 precision);
Port number to set precision
(from 0 to 10)
Number of specified channel (0 to 3)
Resolution of ADC; filter value
SUCCESS
If wrong type of module or no module
E_MNF
is fitted on the selected port
If wrong channel number is specified
E_PARAM
Illegal precision value (must be within
E_BMODE
19 to 2000).
or standard OS-9 error code (refer to the OS-9
Technical Manual Error Codes Section).
©1996 PEP Modular Computers GmbH
Chapter 5 Analog Modules
March 12, 1996