Pepper Computer RS232, RS485 user manual SMDAD1GetVRaw Syntax, RetVal = SMDAD1GetVRaw0, 2, 0x07FF

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

5.1.8.4 SMDAD1GetVRaw

Syntax

error_code SMDAD1GetVRaw(u_int8 PortNr, u_int8 Channel, int16 *pValue);

Description

This function fetches the conversion result of a selected channel without performing a gain or offset correction. 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

5

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 = SMDAD1GetVRaw(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
March 12, 1996	©1996 PEP Modular Computers GmbH						Page 5 - 19