Pepper-computer Modular Computers RS485 User Manual download pdf (Page 234)

100

101

SMART I/O User’s Manual

March 12, 1996

Page 5 - 78

Chapter 5 Analog Modules

5.3.8.12 SMADCSetGain

Syntax

error_code SMADCSetGain(u_int8 PortNr, u_int8 channel,

u_int8 gain);

Description

This function checks if an SM-THERM board is fitted on the specified port

and if the channel is valid and sets the value of the gain amplifier. The valid

values for gain are defined in the file smadc.h. The default values for the

attached sensor are substituted here when the sensor type is selected!

Input

u_int8 PortNr

Port number to set gain

(from 0 to 10)

u_int8 channel

Number of specified channel (0 to 3)

u_int8 gain

Value of gain amplifier (0 to 7 for gain factors

from 1 to 128)

Output

error_code SUCCESS

E_MNF

If wrong type of module or no module

is fitted on the selected port

E_PARAM

If wrong channel number is specified

E_BMODE

Illegal gain value

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

Technical Manual Error Codes Section).

Example

RetVal = SMADCSetGain(0, 1, 2); {gain of 4}

1 2 ... 229 230 231 232 233 234 235 236 237 238 239 ... 319 320

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Pepper-computer Modular Computers RS485 User Manual Page 234

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