Pepper Computer RS485, RS232 user manual SMDAD1GetV Syntax, RetVal = SMDAD1GetV0, 2, 0x07FF

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

5.1.8.5 SMDAD1GetV

Syntax

error_code SMDAD1GetV(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 done with the use of the selected conversion table. The result is always a signed integer value. If bipolar mode is selected, the function returns the 2’s complement value of the original read.

Input

u_int8 PortNr u_int8 Channel

int16 *pValue

Output

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

error_code

Example

SUCCESS	if module was not initialized
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).

RetVal = SMDAD1GetV(0, 2, 0x07FF);

					Value (16-bit HEX)
			Unipola	r			Bipolar
		Positive Full-Scale				$07FF	Positive Full-Scale	$07FF
			+1LSB			$0001	+1LSB	$0001
		0				$0000	-1LSB	$FFFF
							Negative Full-Scale	$F800
Page	5 - 20		©1996 PEP Modular Computers GmbH						March 12, 1996