Pepper Computer RS232, RS485 user manual SMADC1GetV Syntax, RetVal = SMADC1GetV0, 2, 0x07FF

Chapter 5 Analog Modules SMART I/O User’s Manual

5.4.8.4 SMADC1GetV

Syntax

error_code SMADC1GetV(u_int8 PortNr, u_int8 Channel, int16 *pValue);

Description

This function fetches the conversion result of a selected channel. A gain and offset correction is performed and the result stored as a signed integer value.

Input

u_int8 PortNr u_int8 Channel

int16 *pValue

Output

error_code

Example

SM-Port to be accessed

Number of the ADC input channel to access (0-3)

Pointer to the location where the conversion result will be stored

SUCCESS	if module was not initialised
E_SEEK
E-BMODE	if the module is unknown

or standard OS-9 error code (refer to the OS-9 Technical Manual Error Codes Section).

5

RetVal = SMADC1GetV(0, 2, 0x07FF);

		Value (16-bit HEX)
Unipola	r			Bipolar
Positive Full-Scale			$0FFF	Positive Full-Scale	$07FF
+1LSB			$0001	+1LSB	$0001
0			$0000	0	$0000
				-1LSB	$FFFF
				Negative Full-Scale	$F800

October 01, 1996 ©1996 PEP Modular Computers GmbH Page 5 - 97