ADLINK ACL-8216 User Manual

NuDAQ®

ACL-8216

16-bit High Resolution

Data Acquisition Card

User’s Guide

©Copyright 2001ADLINK Technolgoy Inc.

All Rights Reserved.

Manual Rev. 4.10: April 15, 2000

Part no: 50-11015-100

The information in this document is subject to change without prior notice in
order to improve reliability, design and function and does not represent a
commitment on the part of the manufacturer.

In no event will the manufacturer be liable for direct, indirect, special,
incidental, or consequential damages arising out of the use or inability to use
the product or documentation, even if advised of the possibility of such
damages.

This document contains proprietary information protected by copyright. All
rights are reserved. No part of this manual may be reproduced by any
mechanical, electronic, or other means in any form without prior written
permission of the manufacturer.

Trademarks

NuDAQ, ACL-8216 are registered trademarks of ADLINK Technology Inc.,

Other product names mentioned herein are used for identification purposes
only and may be trademarks and/or registered trademarks of their respective
companies.

Getting service from ADLINK

♦ Customer Satisfaction is always the most important thing for ADLINK

Tech Inc. If you need any help or service, please contact us and get it.

Web Site http://www.adlink.com.tw
Sales & Service [e-mail]
Technical NuDAQ [e-mail]
Support NuDAM [e-mail]
NuIPC [e-mail]
NuPRO [e-mail]
Software [e-mail]
TEL [phone] FAX [phone]
Address 9F, No. 166, Jian Yi Road, Chungho City, Taipei, 235 Taiwan, R.O.C.

♦ Please inform or FAX us of your detailed information for a prompt,

satisfactory and constant service.

Company/Organization

Contact Person

E-mail Address

Address

Country

TEL

Web Site

Product Model

Environment to Use □ OS

□ Video Card:

□ Other:

Challenge Description

ADLINK Technology Inc.

Detailed Company Information

Questions

□ Computer Brand

□ M/B:□ CPU:

□ Chipset: □ BIOS::

□ Network Interface Card:

FAX

Suggestions for ADLINK

Table of Contents

Chapter 1 Introduction ..................................................... 1

1.1 Features ................................................................................. 2

1.2 Specifications ......................................................................... 3

1.3 Software Support ................................................................... 5

1.3.1 Programming Library...........................................................5

1.3.2 LabView Driver ....................................................................5

Chapter 2 Installation ....................................................... 6

2.1 What You Have...................................................................... 6

2.2 Unpacking ..............................................................................7

2.3 ACL-8216's Layout.................................................................8

2.4 Jumper and DIP Switch Description ......................................9

2.5 Base Address Setting ............................................................9

2.6 Analog Input Channel Configuration....................................11

2.7 DMA Channel Setting ..........................................................12

2.8 Internal/External Trigger Setting ..........................................13

2.9 Clock Source Setting ...........................................................14

2.10 IRQ Level Setting................................................................. 14

2.11 D/A Reference Voltage Setting............................................ 15

2.12 Connectors Pin Assignment.................................................17

2.13 Daughter Board Connection ................................................20

2.13.1 Connect with ACLD-8125 ................................................. 20

2.13.2 Connect with ACLD-9137 ................................................. 20

2.13.3 Connect with ACLD-9182 ................................................. 20

2.13.4 Connect with ACLD-9185 ................................................. 20

2.13.5 Connect with ACLD-9188 ................................................. 20

Chapter 3 Registers Format .......................................... 21

3.1 I/O Port Address ..................................................................22

3.2 A/D Data Registers & Status Control Register ....................23

3.3 A/D Channel Multiplexer Register........................................ 25

3.4 A/D Range Control Register ................................................27

3.5 A/D Operation Mode Control Register .................................28

3.6 Clear Interrupt Register........................................................29

3.7 Software Trigger Register ....................................................29

3.8 Digital I/O register ................................................................30

3.9 D/A Output Register.............................................................31

Table of Contents • i

3.10 Internal Timer/Counter Register...........................................32

Chapter 4 Operation Theorem ....................................... 33

4.1 A/D Conversion.................................................................... 33

4.1.1 A/D Conversion Procedure............................................... 33

4.1.2 A/D Trigger Modes ........................................................... 34

4.1.3 A/D Data Transfer Modes................................................. 35

4.2 D/A Conversion.................................................................... 36

4.3 Digital Input and Output .......................................................37

4.4 Timer/Counter Operation .....................................................38

Chapter 5 C/C++ Library ................................................ 41

5.1 Installation ............................................................................ 41

5.2 _8216_Initial......................................................................... 42

5.3 _8216_Switch_Card_No ...................................................... 43

5.4 _8216_DI..............................................................................44

5.5 _8216_DI _Channel .............................................................44

5.6 _8216_DO............................................................................ 45

5.7 _8216_DA ............................................................................46

5.8 _8216_AD_Input_Mode ....................................................... 47

5.9 _8216_AD_Set_Channel .....................................................48

5.10 _8216_AD_Set_Range ........................................................ 49

5.11 _8216_AD_Set_Mode..........................................................50

5.12 _8216_AD_Soft_Trig ...........................................................51

5.13 _8216_AD_Acquire..............................................................52

5.14 _8216_CLR_IRQ ................................................................. 53

5.15 _8216_AD_DMA_Start ........................................................ 54

5.16 _8216_AD_DMA_Status......................................................56

5.17 _8216_AD_DMA_Stop......................................................... 56

5.18 _8216_AD_INT_Start...........................................................57

5.19 _8216_AD_INT_Status ........................................................58

5.20 _8216_AD_INT_Stop...........................................................58

5.21 _8216_AD_Timer .................................................................59

5.22 _8216_Timer_Start ..............................................................60

5.23 _8216_Timer_Read .............................................................60

5.24 _8216_Timer_Stop ..............................................................61

Chapter 6 Calibration & Utilities.................................... 62

6.1 What do you need................................................................62

6.2 VR Assignment ....................................................................63

ii • Table of Contents

6.3 A/D Adjustment ....................................................................63

6.4 D/A Adjustment ....................................................................64

6.4.1 Reference Voltage Calibration.......................................... 64

6.4.2 D/A Channel Calibration................................................... 64

Appendix A Demo Programs........................................ 65

Warranty Policy .............................................................. 66

Table of Contents • iii

How to Use This Guide

This manual is designed to help you use the ACL-8216. The manual
describes how to modify various settings on the ACL-8216 card to meet your
requirements. It is divided into six chapters:

Chapter 1,

•
applications, and specifications.

Chapter 2,

•
layout of ACL-8216 is shown, the switch setting for base address,
and jumper setting for analog input channel configuration, reference
voltage setting, trigger source, interrupt level and DMA channel are
specified. The connectors' pin assignment and how to connect the
outside signal are described.

Chapter 3,

•
and structure of the ACL-8216, this information is very important for
the programmers who want to control the hardware by low-level
programming.

Chapter 4,

•

8216. The A/D, D/A, DIO and timer/counter functions are introduced.
Also, some programming concepts are specified.

Chapter 5,

•
environment.

Chapter 6,

•
ACL-8216 for accurate measurement.

"Introduction," gives an overview of the product features,

"Installation," describes how to install the ACL-8216. The

"Registers format," describes the details of register format

"Operation Theorem" describes how to operate the ACL-

"C/C++ Library," describes the C++ Library for DOS

"Calibration and utilities," describes how to calibrate the

iv • How to Use This Guide

1

Introduction

The ACL-8216 is a high performance, high resolution multi-function data
acquisition card for the IBM PC or compatible computers.

...

...

D/O 0

DO 1

DI 15

DI 1

D/I 0

16 BIT

EXT.CLK

TO PACER TRIG

OUT 0

<

16 BIT

16 BIT

COUNTER #0

COUNTER #1

OSC.

4 MHz

12-Bit

Code Latch

REGISTER

DIGITAL INPUT

16 BIT

COUNTER #2

16 Bit

FR/2

2MHz

A/D Converter

+15

12-Bit

Code Latch

DO 15

16 BIT

REGISTER

DIGITAL INPUT

INPUT

BUFFER

(ADS7805)

INTERNAL BUS

GAIN

AMP

-15

TRIG

TRIG

PACER

EOC

CONTROL

DACK

DRQ

+5V

SELECT

DC/DC

TRIG

EXTERNAL

SOFTWARE

TRIG

LOGIC

LOGIC

INTERRUPT

IRQ SELECT

#1 OR #3

DMA SELECT

DATA

BUFFER

PC/AT BUS

Figure 1.1 ACL -8216 BLOCK DIAGRAM

CONVERTER

I/O PORT DECODER

D/A #1 12 BIT

D/A #0 12 BIT

MULITIPLYING D/A

MULITIPLYING D/A

<

<

GND

GND

REF 0 IN

D/A 0 OUT

REF 1 IN

D/A 1 OUT

Analog

Multiplexer

16 channel

Single-ended

>

>

...

CH 0

CH 1

CH 2

ANALOG

INPUT

CONTROL

MUX SCAN

>

CH 15

Introduction • 1

The ACL-8216 series is designed to combine all the data acquisition
functions, such as A/D, D/A, DIO, and timer/counter in a single board, The
high-end specifications of the card makes it ideal for wide range of
applications requiring high resolution 16-bit data acquisition at low cost. The
Figure 1.1 shows the block diagram of the ACL-8216.

The ACL-8216 Series features 16 single-ended inputs or 8 differential inputs
at up to 100 Khz, 2 channels multiplying 12-bit double-buffered analog output,
16 digital inputs and 16 digital outputs, and one timer/counter channel.

1.1 Features

• The ACL-8216 High Resolution Multi-function Data Acquisition Card
provides the following advanced features:

• AT-Bus

• 16-bit hgih resolution analog input

• 16 single-ended or 8 differential analog input channels

• Bipolar input signals

• Programmable gain of x1, x2, x4, x8

• On-chip sample & hold

• Two 12-bit monolithic multiplying analog output channels

• 16 digital output channels

• 16 digital input channels

• 3 independent programmable 16-bit down counters

• Programmable sampling rate of up to 100KHz

:

• Three A/D trigger modes
trigger, and external pulse trigger

• AT interrupt IRQ capability
selectable

• Integral DC-to-DC converter for stable analog power source

• 37-pin D-type connector

:

• Compact size

half-size PCB

software trigger, programmable pacer

:

9 IRQ levels (IRQ3~IRQ15) are jumper

2 • Introduction

1.2 Specifications

Analog Input (A/D)

♦

Converter:

•

Resolution:

•

Number of channels:

•

Input Range:

•

Bipolar : ± 10V, ±5V, ±2.5V,±1.25V

Conversion Time:

•

Sampling Rate:

•

100KHz maximum for single channe

20KHz maximum for multi-channels multiplexing

Overvoltage protection:

•

Differential Linearity Error:

•

Accuracy: 0.003%,

•

Input Impedance:

•

AD conversion trigger soruces:

•

Data Transfer:

•

Analog Output (D/A)

•

Converter:

•

Resolution:

•

Number of channels:

•

Output Range:

•

Internal reference: (unipolar) 0~5V or 0~10V

External reference: (unipolar) max. +10V or -10V

Settling Time:

•

Linearity:

•

Output driving capability:

•

ADS7805 or equivalent, successive approximation type

16-bit

(programmable)

Pooling, Interrupt, DMA

DAC7541 or equivalent, monolithic multiplying

12-bit

30 µ sec

±1/2 bit LSB

16 single-ended or 8 differential

8 µ sec

Continuous ± 35V maximum

2 LSB

±

1 LSB

±

10 MΩ / 5pF

Software, Pacer, and External

2 double-buffered analog outputs

±5mA max.

Digital I/O (DIO)

♦

Channel:

•

Input Voltage:

•

Low: Max. 0.8V

16 TTL compatible inputs and outputs

Introduction • 3

High: Min. +2.0V

Input Load:

•

Low: +0.5V @ -0.2mA max.

High: +2.7V @+20uA max.

Output Voltage:

•

Low: Max. 0.5V

High: Min. +2.7V

Driving Capacity:

•

Low: Max. +0.5V at 8.0mA ( Sink)

High: Min. 2.7V at 0.4mA( Source)

Programmable Counter

•

Device:

•

A/D pacer:

•
2MHz clock base

Counter:

•
external clock

Pacer Output:

•

General Specifications

♦

I/O Base Address

•

Interrupt IRQ

•

DMA Channel

•

Connector

•

Operating Temperature

•

Storage Temperature

•

Humidity

•

Power Consumption

•

+5 V @ 420 mA maximum

+12 V @ 240 mA maximum

Dimension

•

8254

: 5 ~ 95%, non-condensing

32-bit timer( two 16-bit counter cascaded together) with a

One 16-bit counter with an internal 2MHz clock base or

0.00046 Hz ~ 100K Hz

: 16 consecutive address location

: IRQ3, 5,6,7,9,10,11,12,15

: CH1 or CH3

: 37-pin D-type connector

: 163 mm (L) X 123mm(W)

: 0° C ~ 55° C

: -20° C ~ 80° C

:

4 • Introduction

1.3 Software Support

1.3.1 Programming Library

For the customers who are writing their own programs, we provide MS-DOS
Borland C/C++ programming library.

ACLS-DLL2 is the Development Kit for NuDAQ ISA-Bus Cards with Analog
I/O, windows 3.1/95(98)/NT. ACLS-DLL2 can be used for many programming
environments, such as VC++, VB, Delphi. ACLS-DLL2 is included in the
ADLINK CD. It need license.

1.3.2 LabView Driver

The ACLS-LVIEW includes the ACL-8316/8312’s Vis, which is used to
interface with NI’s LabView software package. The ACLS-LVIEW supports
Windows-95(98)/NT. ACLS-LVIEW is included in the ADLINK CD. It need
license.

Introduction • 5

2

Installation

This chapter describes how to install the ACL-8216. At first, the contents in
the package and unpacking information that you should care about are
described. The jumpers and switches setting for the ACL-8216's base
address, analog input channel configuration, interrupt IRQ level, voltage
source, etc. are also specified.

2.1 What You Have

In addition to this User's Manual, the package includes the following items:

• ACL-8216 Enhanced Multi-function Data Acquisition Card

• ADLINK CD

If any of these items is missing or damaged, contact the dealer from whom
you purchased the product. Save the shipping materials and carton in case
you want to ship or store the product in the future.

6 • Installation

2.2 Unpacking

Your ACL-8216 card contains sensitive electronic components that can be
easily damaged by static electricity.

The card should be done on a grounded anti-static mat. The operator should
be wearing an anti-static wristband, grounded at the same point as the anti­static mat.

Inspect the card module carton for obvious damage. Shipping and handling
may cause damage to your module. Be sure there are no shipping and
handing damages on the module before processing.

After opening the card module carton, extract the system module and place it
only on a grounded anti-static surface component side up.

Again inspect the module for damage. Press down on all the socketed IC's to
make sure that they are properly seated. Do this only with the module place
on a firm flat surface.

Note: DO NOT APPLY POWER TO THE CARD IF IT HAS BEEN

DAMAGED.

You are now ready to install your ACL-8216.

Installation • 7

2.3 ACL-8216's Layout

-10V

-5V

JP1

SING

INTREF

EXTREF

JP2

R6

VR5

VR3 VR4

R2

R1

DIFF

JP3

CN3

EXTCLK

8254

JP7

DACK

DRQ

JP8

ADS7 805

JP6

INTCLK

8 • Installation

JP4

INTTRG

EXTTRG

CN1

SW1

JP5

CN2

8216

D/G OUT D/G IN

Figure 2.1 PCB Layout of the ACL-8216

3 5 6 7 910111215X

2.4 Jumper and DIP Switch Description

A (

)

You can change the ACL-8216's channels and the base address by setting
jumpers and DIP switches on the card. The card's jumpers and switches are
preset at the factory. You can change the jumper settings for your own
applications.

A jumper switch is closed (sometimes referred to as "shorted") with the
plastic cap inserted over two pins of the jumper. A jumper is open with the
plastic cap inserted over one or no pin(s) of the jumper.

2.5 Base Address Setting

The ACL-8216 requires 16 consecutive address locations in the I/O address
space. The base address of the ACL-8216 is restricted by the following
conditions.

1.

The base address must be within the range Hex 000 to Hex 3FF.

2.

The base address should not conflict with any PC reserved I/O
address. see Appendix A.

3.

The base address must not conflict with any add-on card on your own
PC. Please check your PC before installing the ACL-8216.

The ACL-8216's base address of registers is selected by an 6 positions DIP

SW1

switch
possible base address combinations are listed as Table 2.2. You may modify
the base address if the address HEX 220 has been occupied by another add­on card.

. The default setting of base address is set to be HEX 220. All

SW1 : Base Address = Hex 220

ON

2345

1

8 7 6 5 4

Figure 2.2 Default Base Address Setting

DIP

Installation • 9

I/O port

Address(Hex)

200-20F

1

A8

ON

(0)

2

A7

ON

(0)

3

A6

ON

(0)

4

A5

ON

(0)

5

A4

ON

(0)

210-21F

220-22F
(default)

230-23F

ON

(0)

ON

(0)

ON

(0)

ON

(0)

ON

(0)

ON

(0)

ON

(0)

ON

(1)

ON

(0)

ON

(0)

OFF

(1)

OFF

(1)

OFF

(1)

ON

(0)

OFF

(1)

:

300-30F

OFF

(1)

ON

(0)

ON

(0)

ON

(0)

ON

(0)

:

3F0-3FF

OFF

(1)

OFF

(1)

OFF

(1)

OFF

(1)

OFF

(1)

Table 2.2 Possible Base Address Combinations

A0, ..., A9 is corresponding to PC Bus address lines

A9 is always set as “1”.

How to define the base address for the ACL-8216 ?

The DIP1 to DIP6 in the switch SW1 are one to one
corresponding to the PC bus address line A8 to A4. A0~A3 are
always 0, and A9 is always 1. If you want to change the base
address, you can only change the values of A8 to A4 (the shadow
area of below table). The following table is an example, which
shows you how to define the base address as Hex 220

Base Address: Hex 220

2 2 0

1 0 0 0 1 0 0 0 0 0

A9 A8 A7 A6 A5 A4 A3 A2 A1 A0

10 • Installation

2.6 Analog Input Channel Configuration

The ACL-8216 offer 16 single-ended or 8 differential analog input channels.
The jumper JP3 controls the analog input channel configuration. The settings
of JP3 is specified as following illustration.

SINGLE

Single-ended

(default setting)

JP3

DIFF

SINGLE

Differential Input

JP3

DIFF

Figure 2.3 Analog Input Channels Configuration

Installation • 11

2.7 DMA Channel Setting

The A/D data transfer of ACL-8216 is designed with DMA transfer capability.
The setting of DMA channel 1 or channel 3 is controlled by the jumpers JP8
and JP7. The possible settings are shown below.

Note: On floppy disk only machine, we suggest you to set DMA level 3. If

you have hard disk equipped computer, level 1 is preferable.

NO DMA

DMA 1

(Default)

DMA 3

DACK
JP7

13

DACK
JP7

13

DACK
JP7

13

X

X

X

DRQ
JP8

13

DRQ
JP8

13

DRQ
JP8

13

Figure 2.4 DMA Channel Setting

X

X

X

12 • Installation

2.8 Internal/External Trigger Setting

The A/D conversion trigger source of ACL-8216 comes from internal or
external. The internal or external trigger source is setting by JP4, as shown
on Figure 2.5. Note that there are two internal on-board trigger sources, one
is the software trigger and the other is the programmable pacer trigger, which
is controlled by the mode control register(see section 4.5).

JP4

Internal

(default setting)

INTTRG

EXTT

JP4

External Trigger

INTTRG

EXTT

Figure 2.5 Trigger Source Setting

JP6

Internal Clock

Source : 2MHz

(default setting)

INTCLK

EXTCLK

JP6

External Clock

Source

INTCLK

EXTCLK

Figure 2.6 Timer's Clock Source Setting

Installation • 13

2.9 Clock Source Setting

The 8254 programmable interval timer is used in the ACL-8216. It provides 3
independent channels of 16-bit programmable down counters. The input of
counter 2 is connected to a precision 2MHz oscillator for internal pacer. The
input of counter 1 is cascaded from the output of counter 2. The channel 0 is
free for user's applications. There are two selections for the clock source of
channel 0: the internal 2MHz clock or the external clock signal from
connector CN3 pin 37. The setting of clock is shown as Figure 2.6.

2.10 IRQ Level Setting

The ACL-8216 can connect to any one of the interrupt lines of the PC I/O
channel. The interrupt line is selected by the jumper JP7. If you wish to use
the interrupt capability of ACL-8216, you must select an interrupt level and
place the jumper in the appropriate position to enable the particular interrupt
line.

The default interrupt level is IRQ15, which is selected by placing the jumper
on the pins in row number 15. Figure 2.7 shows the default interrupt jumper
setting IRQ15. You only remove the jumper from IRQ15 to other new pins, if
you want to change to another IRQ level.

Note

: Be aware that there is no other add-on card shares the same

interrupt level at the same system.

JP7

No Interrupt :

Interrupt level :

IRQ15

(default setting)

14 • Installation

3 5 6 7 9 10 11 15 NC12

JP7

3 5 6 7 9 10 11 15 NC12

Figure 2.7 IRQ Level Setting

2.11 D/A Reference Voltage Setting

The D/A converter's reference voltage source can be internal or external
generated. The external reference voltage comes from connector CN3 pin
31(ExtRef1) and pin12(ExtRef2), see section 3.1. The reference source of
D/A channel 1 and channel 2 are selected by JP2, respectively. Their
possible settings are shown as below:

JP2

D/A CH1 is External

D/A CH2 is External

D/A CH1 is External

D/A CH2 is Internal

D/A CH1 is Internal

D/A CH2 is External

INTR E F

ExtRef1

JP2

INTREF INT R E F

ExtRef1

JP2

INTREF INTREF

ExtRef1

INTR E F

ExtRef2

ExtRef2

ExtRef2

D/A CH1 is Internal

D/A CH2 is Internal

(defa u lt s et tin g)

INTREF INTREF

ExtRef1

JP2

ExtRef2

Figure 2.8 D/A Voltage Setting

The internal voltage is -5V or -10V which can is selected by JP1. The
possible configurations are specified as Figure 2.9. Note that the internal
reference voltage is used only when the JP2 or JP3 is set to internal
reference.

Installation • 15

Reference Voltage is

-5V (default setting)

-10V
JP1

-5V

Reference Voltage is

-10V

-10V

-5V

Figure 2.9 Internal Reference Voltage Setting

JP1

16 • Installation

2.12 Connectors Pin Assignment

The ACL-8216 comes equipped with two 20-pin insulation displacement
connectors - CN1 and CN2 and one 37-pin D-type connector - CN3. The
CN1 and CN2 are located on board and CN3 located at the rear plate.

CN1 is used for digital signal output, CN2 for digital signal input, CN3 for
analog input, analog output and timer/counter's signals. The pin assignment
for each connectors are illustrated in the Figure 3.1 ~ Figure 3.3.

CN 2: Digital Signal Input (

•

DI 0 - 15

)

CN2

DI 0
DI 2
DI 4
DI 6
DI 8
DI 10
DI 12
DI 14

GND
+5V

Figure 3.1. Pin Assignment of CN2

CN 1: Digital Signal Output (

•

DO 0
DO 2
DO 4
DO 6
DO 8
DO 10
DO 12
DO 14

GND
+5V

Figure 3.2. Pin Assignment of CN1

1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20

DO 0 - 15

CN1

1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20

DI 1
DI 3
DI 5
DI 7
DI 9
DI 11
DI 13
DI 15

GND
+ 12V

)

DO 1
DO 3
DO 5
DO 7
DO 9
DO 11
DO 13
DO 15

GND
+12V

Installation • 17

Legend:

AI2

AI3A

A

AI6A

AI5

A

A

A

A

A

A

AI8A

A

AI12

A

A

A

AI15

A

AO2

g

A

A

A

A

A

A

A

A

A

A

A

AIL2

A

A

AIL5

AIL6

A

AIL3

A

A

A

A

A

E

g

DO n: Digital output signal channel n
DI n: Digital input signal channel n

GND: Digital ground

CN 3: Analog Input/Output & Counter/Timer

•

( for single-ended connection)

CN3

1

.GND
.GND

V.R EF

ExtRef2

+12V

.GND

D.GND

COUT0

ExtTr

N/C

+5V

I0

2

I1

3
4
5

I4

6
7
8

I7

9
10
11
12
13
14
15

16
17
18
19

20
21
22

23
24
25

26
27
28
29
30
31
32
33
34
35
36
37

Figure 3.3a. Pin Assignment of CN3

CN 3: Analog Input/Output & Counter/Timer

•

( for differential connection)

CN3

1

IH0
IH1
IH2
IH3
IH4
IH5
IH6
IH7

.GND
.GND

V.R EF

ExtRef2

+12V

.GND

D.GND

COUT0

ExtTr

N/C

+5V

2
3
4
5

6
7
8

9
10
11
12

13
14
15

16
17

18
19

20
21
22

23
24
25

26
27
28
29
30
31
32
33
34
35
36
37

Figure 3.3b. Pin Assignment of CN3

Legend:

I9
I10
I11

I13
I14

.GND
.GND

O1

ExtRef1

GATE0
GATE
N/C
N/C
ExtCLK

ExtRef1

GATE0
GAT
N/C
N/C
ExtCLK

IL0
IL1

IL4

IL7

.GND
.GND

O1

O2

18 • Installation

AIn: Analog Input Channel n ( single-ended)
AIHn: Analog High Input Channel n ( differential)
AILn: Analog Low Input Channel n ( differential)
ExtRef n: External Reference Voltage for D/A CH n
AOn: Analog Output Channel n
ExtCLK: External Clock Input
ExtTrig: External Trigger Signal
CLK: Clock input for 8254 Counter 0
GATE: Gate input for 8254 Counter 1 & 2
COUT n: Signal output of Counter n

V.ERF: Voltage Reference
A.GND: Analog Ground
GND: Ground

Installation • 19

2.13 Daughter Board Connection

The ACL-8216 can be connected with five different daughter boards, ACLD­8125, ACLD-9137, 9182, 9185, and 9188. The functionality and connections
are specified as follows.

2.13.1 Connect with ACLD-8125

The ACLD-8125 has a 37-pin D-sub connector, which can connect with ACL­8216 through 37-pin assemble cable. The most outstanding feature of this
daughter board is a CJC ( cold junction compensation) circuit on board. You
can directly connect the thermocouple on the ACL-8125 board.

2.13.2 Connect with ACLD-9137

The ACLD-9137 is a direct connector for the card which is equipped with 37­pin D-sub connector. This board provides a simple way for connection. It is
very suitable for the simple applications that do not need complex signal
condition before the A/D conversion is performed.

2.13.3 Connect with ACLD-9182

The ACLD-9182 is a 16 channel isolated digital input board. This board is
connected with CN1 of ACL-8216 via 20-pin flat cable. The advantage of
board is an 500Vdc isolation voltage is provided, and it can protect your PC
system from damage when an abnormal input signal is occurred.

2.13.4 Connect with ACLD-9185

The ACLD-9185 is a 16 channel SPDT relay output board. This board is
connected with CN2 of ACL-8216 via 20-pin flat cable. by using this board,
you can control outside device through the digital output signals.

2.13.5 Connect with ACLD-9188

ACLD-9188 is a general purpose terminal board for all the card which comes
equipped with 37-pin D-sub connector.

20 • Installation

3

Registers Format

The detailed descriptions of the register format and structure of the ACL­8216 are specified in this chapter. This information is quite useful for the
programmer who wish to handle the card by low-level program.

In addition, the low level programming syntax is introduced. This information
can help the beginners to operate the ACL-8216 in the shortest learning time.

Registers Format • 21

3.1 I/O Port Address

The ACL-8216 requires 16 consecutive addresses in the PC I/O address
space. The Table 4.1 shows the I/O address of each register with respect to
the base address. The function of each register also be shown.

I/O Address Read Write
Base + 0 Counter 0 Counter 0

Base + 1 Counter 1 Counter 1
Base + 2 Counter 2 Counter 2
Base + 3 Not Used 8254 Counter Control
Base + 4 A/D low byte CH1 D/A low byte
Base + 5 A/D high byte CH1 D/A high byte
Base + 6 DI low byte CH2 D/A low byte
Base + 7 DI high byte CH2 D/A high byte
Base + 8 Status Control Clear Interrupt Request
Base + 9 Not Used A/D Range Control
Base + 10 Not Used Channel MUX
Base + 11 Not Used Mode Control
Base + 12 Not Used Software A/D trigger
Base + 13 Not Used DO low byte
Base + 14 Not Used DO high byte
Base + 15 Not Used Not Used

Table 3.1 I/O Address

22 • Registers Format

3.2 A/D Data Registers & Status Control Register

The ACL-8216 provides 16 single-ended or 8 differential A/D input channels,
the digital data will store in the A/D data registers. The 16 bits A/D data is put
into two 8 bits registers. The low byte data (8 LSBs) are put in address
BASE+4 and the high byte data is put in address BASE+5. A Status Control
Register( Base+8) is used to check if the D/A conversion is ready. An DRDY
bit is used to indicate the status of A/D conversion. DRDY goes to low level
means A/D conversion is completed.

Address : BASE + 4 and BASE + 5

Attribute: read only

Data Format:

Bit 7 6 5 4 3 2 1 0
BASE+4 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0

BASE+5 AD15 AD14 AD13 AD12 AD11 AD10 AD9 AD8

AD15 .. AD0: Analog to digital data. AD15 is the Most Significant Bit (MSB).
AD0 is the Least Significant Bit(LSB).

The A/D converted data is in Binary Two‘s Complement data output format.
Refer to Table 3.3 for ideal output code.

Description Analog Input

Binary Code

Full Scale Range
Least Signification Bit

( LSB)
+Full Scale 9.999695V 0111 1111 1111 1111 7FFF
MidScale 0V 0000 0000 0000 0000 0000
One LSB below
MidScale

-Full Scale -10V 1000 0000 0000 0000 8000

Table 3.2 Ideal Input Voltage and Output Code

±10V

305µV

-305µV

Digital Output
Binary Two‘s Complement

Hex
Code

1111 1111 1111 1111 FFFF

Registers Format • 23

Address : BASE +8

Attribute: read only

Data Format:

Bit 7 6 5 4 3 2 1 0
BASE+8 - - DRDY - - - - -

DRDY: Data Ready Signal.

1: A/D data is not ready

0: A/D conversion is completed.

It will be set to 1, when reading the low byte.

24 • Registers Format

3.3 A/D Channel Multiplexer Register

This register is used to control the A/D channels to be converted. It's a write
only register. When the channel number is written to the register, the
multiplexer switches to the new channel and await for conversion.

Address : BASE + 10

Attribute: write only

Data Format:

Bit 7 6 5 4 3 2 1 0
BASE+10 X X CS1 CS0 CL3 CL2 CL1 CL0

CLn: multiplexer channel number.

CL2 is MSB, and CL0 is LSB.

CS0 and CS1 are used to determine which MPC508A chip is selected. The
MPC508A is used to multiplex channel from channel, when CS0 is set as 1,
the analog input channels from 0 to 7 is selectable, and CS1 is set, the ch 8
to ch 15 can be selectable. When both CS0 and CS1 are set as 1, it means
the analog input is differential mode. The possible analog input channel
selections are listed as the table below.

Bit
Channel

S.E. CH0 X X 0 1 0 0 0 0
S.E. CH1 X X 0 1 0 0 0 1
S.E. CH2 X X 0 1 0 0 1 0
S.E. CH3 X X 0 1 0 0 1 1
S.E. CH4 X X 0 1 0 1 0 0
S.E. CH5 X X 0 1 0 1 0 1
S.E. CH6 X X 0 1 0 1 1 0
S.E. CH7 X X 0 1 0 1 1 1

S.E. CH8 X X 1 0 1 0 0 0
S.E. CH9 X X 1 0 1 0 0 1
S.E. CH10 X X 1 0 1 0 1 0
S.E. CH11 X X 1 0 1 0 1 1
S.E. CH12 X X 1 0 1 1 0 0
S.E. CH13 X X 1 0 1 1 0 1
S.E. CH14 X X 1 0 1 1 1 0
S.E. CH15 X X 1 0 1 1 1 1

D.I. CH0 X X 1 1 0 0 0 0
D.I. CH1 X X 1 1 0 0 0 1
D.I. CH2 X X 1 1 0 0 1 0

7

6

X

X 5 CS1 4 CS0 3 CL3 2 CL2 1 CL1 0 CL0

Registers Format • 25

D.I. CH3 X X 1 1 0 0 1 1
D.I. CH4 X X 1 1 0 1 0 0
D.I. CH5 X X 1 1 0 1 0 1
D.I. CH6 X X 1 1 0 1 1 0
D.I. CH7 X X 1 1 0 1 1 1

S.E.

: Single-ended Analog Input

D.I.

: Differential Analog Input

26 • Registers Format

3.4 A/D Range Control Register

The A/D range register is used to adjust the analog input ranges for A/D
channels. Two factor will effect the input range: Gain and Bipolar/Unipolar.
Both of these issues can be controlled by this register. The Table 4.2 shows
the relationship between the register data and the A/D input range.

Address : BASE + 9

Attribute: write only

Data Format:

Bit 7 6 5 4 3 2 1 0
BASE+9 X X X X X X G1 G0

G1 G0 GAIN Mode

0 0 1 Bipolar
0 1 2 Bipolar
1 0 4 Bipolar
1 1 8 Bipolar

Input Range

±10V
±5V
±2.5V
±1.25V

Registers Format • 27

3.5 A/D Operation Mode Control Register

The A/D operation includes the analog signal conversion and the data
transformation. This register controls the internal trigger mode and data
transformation method. It is initialized as software trigger and program polling
transfer when your PC is reset or power on. The details of the A/D operation
is illustrated in Chapter 5. There are four operation modes shown as
following .

Address : BASE + 11

Attribute: write only

Data Format:

Bit 7 6 5 4 3 2 1 0
BASE+11 X X X X X S2 S1 S0

S2 S1 S0 Operation Mode Description
0 0 0 Internal trigger is disable
0 0 1 software trigger and program polling (default)
0 1 0 timer pacer trigger and DMA transfer
1 1 0 timer pacer trigger and interrupt transfer.

Note:

1. When your system power on or reset, the A/D operation will be
initialized as " software trigger and program polling" mode.

2. No matter which mode is selected, the external trigger is
available if the JP4 is set to be external trigger.

3. As long as not the DMA mode is not used, the program polling is
alwayse possible. The syncronization of A/D conversion and
data transfer should be concerned when use program polling.

4. The interrupt will be occurred after end of conversion if the "timer
pacer trigger and interrupt transfer" mode is selected. If you
want to use pacer trigger and interrupt transfer mode, please
enable the IRQ level.

28 • Registers Format

3.6 Clear Interrupt Register

The Interrupt Status Register is used to clear the interrupt status for next new
interrupt can be generated. If the ACL-8216 is in interrupt data transfer mode,
a hardware status flag will be set after each A/D conversion. You have to
clear the status flag by just writing any data to this register, let the ACL-8216
can generate next interrupt if a new A/D conversion is happen.

Address : BASE + 8

Attribute: write only

Data Format:

Bit 7 6 5 4 3 2 1 0
BASE+8 X X X X X X X X

3.7 Software Trigger Register

If you want to generate a trigger pulse to the ACL-8216 for A/D conversion,
you just write any data to this register, and then the A/D converter will be
triggered.

Address : BASE + 12

Attribute: write only

Data Format:

Bit 7 6 5 4 3 2 1 0
BASE+12 X X X X X X X X

Registers Format • 29

3.8 Digital I/O register

There are 16 digital input channels and 16 digital output channels are
provided by the ACL-8216. The address Base + 6 and Base + 7 are used for
digital input channels, and the address Base + 13 and Base + 14 are used for
digital output channels.

Address : BASE + 6 & BASE + 7

Attribute: read only

Data Format:

Bit 7 6 5 4 3 2 1 0
Base + 6 DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0

Base + 7 DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8

Address : BASE + 13 & BASE + 14

Attribute: write only

Data Format:

Bit 7 6 5 4 3 2 1 0
Base + 13 DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
Base + 14 DO15 DO14 DO13 DO12 DO11 DO10 DO9 DO8

30 • Registers Format

3.9 D/A Output Register

The D/A converter will convert the D/A output register data to the analog
signal. The register data of the address Base + 4 and Base + 5 are used for
D/A channel 1, Base +6 and Base +7 are used for D/A channel 2.

Address : BASE + 4 & BASE + 5

Attribute: write only

Data Format: (for D/A Channel 1)

Bit 7 6 5 4 3 2 1 0
Base + 4 DA7 DA6 DA5 DA4 DA3 DA2 DA1 DA0

Base + 5 X X X X DA11 DA10 DA9 DA8

Address : BASE + 6 & BASE + 7

Attribute: write only

Data Format: (for D/A Channel 2)

Bit 7 6 5 4 3 2 1 0
Base + 6 DA7 DA6 DA5 DA4 DA3 DA2 DA1 DA0

Base + 7 X X X X DA11 DA10 DA9 DA8

DA0 is the LSB and DA11 is the MSB of the 12 bits data.

X: don't care

Note: The D/A registers are "double buffered" so that the D/A analog

output signals will not updated until the second (high) byte is written.
This can insure a single step transition when the D/A conversion.

Registers Format • 31

3.10 Internal Timer/Counter Register

Two counter of 8254 are used for periodically triggering the A/D conversion,
the left one is left free for user applications. The 8254 occupies 4 I/O address
locations in the ACL-8216 as shown blow. Users can refer to NEC's or Intel's
data sheet for a full description of the 8254 features, condensed information
is specified in Appendix B.

Address : BASE + 0 ~ BASE + 3

Attribute: read / write

Data Format:

Base + 0 Counter 0 Register ( R/W)
Base + 1 Counter 1 Register ( R/W)
Base + 2 Counter 2 Register ( R/W)
Base + 3 8254 CONTROL BYTE

32 • Registers Format

4

Operation Theorem

The operation theorem of the functions on ACL-8216 card is described in this
chapter. These functions include the A/D conversion, D/A conversion, digital
I/O and counter / timer. The operation theorem can help you to understand
how to manipulate or to program the ACL-8216.

4.1 A/D Conversion

Before programming the ACL-8216 to perform the A/D conversion, you
should understand the following issues:

• A/D conversion procedure

• A/D trigger mode

• A/D data transfer mode

• Signal connection

4.1.1 A/D Conversion Procedure

The A/D conversion is started by a trigger source, then the A/D converter will
start to convert the signal to a digital value. The ACL-8216 provides three
trigger modes, see section 5.1.2.

While A/D conversion, the DRDY bit in Status Control register is cleared to
indicate that the data is not ready. After conversion being completed, the
DRDY bit will return to low(0) level. It means users can read the converted
data from the A/D data registers. Please refer section 4.2 for the A/D data
format.

Operation Theorem • 33

The A/D data should be transferred into PC's memory for further using. The
ACL-8216 provides three data transfer modes that allow users to optimize
the DAS system. Refer to section 5.1.3 for data transfer modes.

4.1.2 A/D Trigger Modes

In the ACL-8216, A/D conversion can be triggered by the Internal or External
trigger source. The jumper JP4 is used to select the internal or external
trigger, please refer to section 2.8 for details. henever the external source is
set, the internal sources are disable.

The two internal sources are the software trigger and the timer pacer trigger
which is controlled by the A/D operation mode control register (BASE+11).
Total three trigger sources are possible in the ACL-8216. The different trigger
conditions are specified as follows:

Software trigger

The trigger source is software controllable in this mode. That is, the A/D
conversion starts when any value is written into the software trigger register
(BASE+12). This trigger mode is suitable for low speed A/D conversion.
Under this mode, the timing of the A/D conversion is fully controlled under
software. However, it is difficult to control the fixed A/D conversion rate
except another timer interrupt service routine is used to generate a fixed rate
trigger.

Timer Pacer Trigger

An on-board timer / counter chip 8254 is used to provide a trigger source for
A/D conversion at a fixed rate. Two counters of the 8254 chip are cascaded
together to generate trigger pulse with precise period. Please refer to section

5.4 for 8254 architecture. This mode is ideal for high speed A/D conversion.
It can be combined with the DMA or the interrupt data transfer. It's
recommend to use this mode if your applications need a fixed and precise
A/D sampling rate.

External Trigger

Through the pin-17 of CN3 (ExtTrig), the A/D conversion also can be
performed when the a rising edge of external signal occures. The conversion
rate of this mode is more flexible than the previous two modes, because the
users can handle the external signal by outside device. The external trigger
can combine with the DMA transfer, interrupt data transfer, or even program
polling data transfer. Generally, the interrupt data transfer is often used
when external trigger mode is used.

34 • Operation Theorem

4.1.3 A/D Data Transfer Modes

On the ACL-8216, three A/D data transfer modes can be used when the
conversion is completed. The data transfer mode is controlled by the mode
control register (BASE+11). The different transfer modes are specified as
follows:

Software Data Transfer

Usually, this mode is used with software A/D trigger mode. After the A/D
conversion is triggered by software, the software should poll the DRDY bit
until it becomes to high level. Whenever the low byte of A/D data is read, the
DRDY bit will be cleared to indicate the data is read out.

It is possible to read A/D converted data without polling. The A/D conversion
time will not excess 8µs on ACL-8216 card. Hence, after software trigger, the
software can wait for at least 10µs then read the A/D register without polling.

Interrupt Transfer

The ACL-8216 provides hardware interrupt capability. Under this mode, an
interrupt signal is generated when the A/D conversion is ended and the data
is ready to be read. It is useful to combine the interrupt transfer with the timer
pacer trigger mode. Under this mode, the data transfer is essentially
asynchronous with the control software.

When the interrupt transfer is used, you have to set the interrupt IRQ level by
hardware jumper. Please refer section 2.10 for IRQ jumper setting. After the
A/D conversion is completed, a hardware interrupt will be inserted and its
corresponding ISR (Interrupt Service Routine) will be invoked and executed.
The converted data is transferred by the ISR program.

DMA Transfer

The DMA (Direct Memory Access) allows data to be transferred directly
between the ACL-8216 and the PC’s memory at the fastest possible rate,
without using any CPU time. The A/D data is automatically transferred to
PC's memory after conversion completed.

The DMA transfer mode is very complex to program. It is recommended to
use the high level program library to operate this card. If you wish to program
the software which can handle the DMA data transfer, please refer to more
information about 8237 DMA controller.

Operation Theorem • 35

4.2 D/A Conversion

A

The ACL-8216 has two unipolar analog output channels. To make the D/A
output connections from the appropriate D/A output, please refer the
following figure:

-5 or -10

Ref In

INT or Ext

D/A Converter

­+

Pin-30 ( A O0)

Pin-32 ( A O1)

To D/A Output

Pin-14 ( A .GND)

nalog GND

The operation of D/A conversion is more simple than A/D operation. You only
need to write digital values into the D/A data registers and the corresponding
voltage will be output from the AO1 or AO2. Refer to section 4.9 for
information about the D/A data registers. The mathematical relationship
between the digital number DAn and the output voltage is formulated as
following:

Vout Vref

=− ×

DAn

4096

where the Vref is the reference voltage, the Vout is the output voltage, and
the DAn is the digital value in D/A data registers.

Before performing the D/A conversion, users should care about the D/A
reference voltage which set by the JP1,JP2 and JP3. Please refer section

2.11 for jumper setting. The reference voltage will effect the output voltage. If
the reference voltage is -5V, the D/A output scaling will be 0~5V. If the
reference voltage is -10V, the D/A output scaling will be 0~10V.

Note that the D/A registers are "double buffered", so that the D/A analog
output signals will not be updated until the high byte is written. When write
12 bits data to D/A registers of the ACL-8216, the low byte must be written
before the high byte. This procedure can insure a single step transition when
the D/A conversion.

36 • Operation Theorem

4.3 Digital Input and Output

To program digital I/O operation is fairly straight forward. The digital input
operation is just to read data from the corresponding registers, and the digital
output operation is to write data to the corresponding registers. The digital I/O
registers‘ format are shown in section 4.9. Note that the DIO data channel

can only be read or written in form of 8 bits together. It is impossible to
access individual bit channel.

The ACL-8216 provides 16 digital input and 16 digital output channels
through the connector CN1 and CN2 on board. The digital I/O signal are fully
TTL/DTL compatible. The detailed digital I/O signal specification can be
referred in section 1.3.

74LS244

Digital Input(DI)

Fr om TTL Signal

74LS373

ACL-8216

Digital Output (DO)

Digital GND (DGND)

Outside Device

To TTL De vic es

Operation Theorem • 37

4.4 Timer/Counter Operation

A

e

5

The ACL-8216 has an interval timer/counter 8254 on board. It offers 3
independent 16-bit programmable down counters; counter 1 and counter 2
are cascaded together for A/D timer pacer trigger of A/D conversion. and
counter 0 is free for your applications. The following figure shows the 8254
timer/counter connection.

CN3 Pin-37

CN3 Pin-33

CN3 Pin-34

2MHz
Oscillator

EXT

INT

Vcc

8254 Timer/Counter

Counter 0

CLK0
GATE0

Counter 1

CLK1
GATE1

OUT0

OUT1

Counter 2

CLK2
GATE2

OUT2

CN3 Pin-1

/D Trigg

CN3 Pin-3

The clock source of counter 0 can be internal or external, while the gate can
be controlled externally and the output is send to the connector CN3. As to
counter 0 and counter 1, the clock source is internally fixed, while the gate
can be controlled externally and the output is send to the connector CN3 too.
All the timer/ counter signals are TTL compatible.

The 8254 Timer / Counter Chip

The Intel (NEC) 8254 contains three independent, programmable, multi­mode 16 bit counter/timers. The three independent 16 bit counters can be
clocked at rates from DC to 5 MHz. Each counter can be individually
programmed with 6 different operating modes by appropriately formatted
control words. The most commonly uses for the 8254 in microprocessor
based system are:

• Pprogrammable baud rate generator

• event counter

• binary rate multiplier

• real-time clock

• digital one-shot

• motor control

38 • Operation Theorem

For more information about the 8254 , please refer to the NEC
Microprocessors and peripherals or Intel Microsystems Components
Handbook.

Pacer Trigger Source

The counter 1 and counter 2 are cascaded together to generate the timer
pacer trigger of A/D conversion. The frequency of the pacer trigger is
software controllable. The maximum pacer signal rate is 2MHz/4=500K which
excess the maximum A/D conversion rate of the ACL-8216. The minimum
signal rate is 2MHz/65535/65535, which is a very slow frequency that user
may never use it.

General Purpose Timer/ Counter

The counter 0 is free for users' applications. The clock source, gate control
signal and the output signal is send to the connector CN3. The general
purpose timer / counter can be used as event counter, or used for measuring
frequency, or others functions. See the 'Timer/Counter Applications' section
for examples.

I/O Address

The 8254 in the ACL-8216 occupies 4 I/O address as shown below.

BASE + 0 LSB OR MSB OF COUNTER 0
BASE + 1 LSB OR MSB OF COUNTER 1
BASE + 2 LSB OR MSB OF COUNTER 2
BASE + 3 CONTROL BYTE

The programming of 8254 is control by the registers BASE+0 to BASE+3.
The functionality of each register is specified this section. For more detailed
information, please refer handbook of 8254 chip.

Control Byte

Before loading or reading any of these individual counters, the control byte
(BASE+3) must be loaded first. The format of the control byte is:

Bit 7 6 5 4 3 2 1 0
SC1 SC0 RL1 RL0 M2 M1 M0 BCD

• SC1 & SC0 - Select Counter ( Bit7 & Bit 6)

SC1 SC0 COUNTER
0 0 Select Counter 0

0 1 Select Counter 1
1 0 Select Counter 2
1 1 ILLEGAL

Operation Theorem • 39

• RL1 & RL0 - Select Read/Load operation ( Bit 5 & Bit 4)
RL1 RL0 OPERATION
0 0 COUNTER LATCH FOR STABLE READ

0 1 READ/LOAD LSB ONLY
1 0 READ/LOAD MSB ONLY
1 1 READ/LOAD LSB FIRST, THEN MSB

• M2, M1 & M0 - Select Operating Mode ( Bit 3, Bit 2, & Bit 1)

M2 M1 M0 MODE
0 0 0 0

0 0 1 1
x 1 0 2
x 1 1 3
1 0 0 4
1 0 1 5

• BCD - Select Binary/BCD Counting ( Bit 0)

0 16-BITS BINARY COUNTER
1 BINARY CODED DECIMAL (BCD) COUNTER (4

DIGITAL)

Note The count of the binary counter is from 0 up to

65,535 and the count of the BCD counter is from 0
up to 9,999

Mode Definitions

In 8254, six operating modes can be selected. they are:

Mode 0:

•

Mode 1:

•

Mode 2:

•

Mode 3:

•

Mode 4:

•

Mode 5:

•

All detailed description of these six modes are written in Intel Microsystems
Components Handbook Volume II Peripherals.

40 • Operation Theorem

Interrupt on Terminal Count

Programmable One-Shot.

Rate Generator.

Square Wave Rate Generator.

Software Triggered Strobe.

Hardware Triggered Strobe.

5

C/C++ Library

This chapter describes the DOS software library, which is free supplied. The
DOS library software includes a utility program, C language library, and some
demonstration programs, which can help you reduce the programming work.

To program in Windows environment, please use ACLS-DLL2. The function
reference manual of ACLS-DLL2 is included in the ADLINK CD. It needs
license.

5.1 Installation

To install the DOS library software and utilities, please follow the following
installation procedures:

1. Put ADLINK CD into the appropriate CD-ROM drive.

2. Type the following commands to change to the card’s directory (X
indicates the CD-ROM drive):

CD \NuDAQISA\8216

X:\>

3. Execute the setup batch program to install the software:

X:\NuDAQISA\8216>

There are 23 function calls provided by the C Language Library, all the
functions of ACL-8216 are covered by this library, its capabilities include A/D
conversion, D/A conversion, Digital Input and Output, etc.

SETUP

C/C++ Library • 41

5.2 _8216_Initial

@ Description

An ACL-8216 card is initialized according to the card number and the
corresponding base address. Every ACL-8216 Multi-Function Data
Acquisition Card have to be initialized by this function before calling
other functions.

@ Syntax

int _8216_Initial(int card_number, int

base_addresss )

@ Argument

card_number:

base_address:

@ Return Code

ERR_NoError
ERR_InvalidBoardNumber
ERR_BaseAddressError

@ Example

#include "8216.h"
#include "aclerr.h"
main()
{
int ErrCode;

Errcode = _8216_Initial( CARD_1, 0x210 );
if( ErrCode != ERR_NoError ) exit(0);

ErrCode = _8216_Initial( CARD_2, 0x220 );
if( ErrCode != ERR_NoError ) exit(0);
.
.
.
}

The card number to be initialized,
only two cards can be initialized,
the card number must be CARD_1 or
CARD_2.

The I/O port base address of the

card .

42 • C/C++ Library

5.3 _8216_Switch_Card_No

@ Description

This function is used on dual-cards system. After initialized two ACL­8216 cards, this function is used to select which card is used currently.

Note: In this library, only two ACL-8216 can be initialized. The reason is

only two DMA channels are supported in the card.

@ Syntax

int _8216_Switch_Card_No(int card_number)

@ Argument

card_number:

@ Return Code

ERR_NoError
ERR_InvalidBoardNumber

@ Example

#include "8216.h"

main()
{
_8216_Initial( CARD_1, 0x210 );
_8216_Initial( CARD_2, 0x220 );
/* Assume NoError when Initialize ACL-8216 */

_8216_Switch_Card_No( Card_1 );

/*..... You can perform certain functions

to Card_1 here*/

_8216_Switch_Card_No( Card_2 );

/*..... You can perform certain functions

to Card_2 here*/

}

The card number to be initialized, only

two cards can be initialized, the card
number must be CARD_1 or CARD_2.

C/C++ Library • 43

5.4 _8216_DI

@ Description

This function is used to read data from digital input port. There are 16
bits of digital input on the ACL-8216. The bit 0 to bit 7 are defined as

low byte

@ Syntax

int _8216_DI( int port_number, unsigned char *data )

@ Argument

port_number:

DI_LOW_BYTE
or DI_HIGH_BYTE.
DI_LOW_BYTE: bit 0 ~ bit 7,
DI_HIGH_BYTE: bit8 ~ bit15

data:

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_PortError

@ Example

See demo program 'DI_DEMO.C'

and the bit 8 to bit 15 are defined as the

To indicate which port is read,

return value from digital port.

high byte

5.5 _8216_DI _Channel

@ Description

This function is used to read data from digital input channels (bit).
There are 16 digital input channels on the ACL-8216. When performs
this function, the digital input port is read and the value of the
corresponding channel is returned.

* channel means each bit of digital input ports.

@ Syntax

int _8216_DI(int di_ch_no, unsigned int *data )

@ Argument

di_ch_no:

to be set from 0 to 15.

data:

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_InvalidDIChannel

@ Example

#include "8216.h"

the DI channel number, the value has

return value, either 0 or 1.

.

44 • C/C++ Library

main()
{
unsigned int data;
int ch;

_8216_Initial( CARD_1, 0x220 );
/* Assume NoError when Initialize ACL-8216 */
for( ch=0; ch<16; ch++ )
{
_8216_DI_channel( ch , &data );
printf( "The value if DI channel %d is
%d.\n" , ch , data );
}
}

5.6 _8216_DO

@ Description

This function is used to write data to digital output ports. There are 16
digital outputs on the ACL-8216, they are divided by two ports,
DO_LOW_BYTE and DO_HIGH_BYTE. The channel 0 to channel 7
are defined in DO_LOW_BYTE port and the channel 8 to channel 15
are defined as the DO_HIGH_BYTE port.

@ Syntax

int _8216_DO(int port_number, unsigned char data )

@ Argument

port_number:
data:

value will be written to digital

output port

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_PortError

@ Example

#include "8216.h"
main()
{
_8216_Initial( CARD_1, 0x220 );
/* Assume NoError when Initialize ACL-8216 */

_8216_DO( DO_LO_BYTE , 0x55 );
printf( "The low byte is now 0x55.\n" );

_8216_DO( DO_HI_BYTE , 0xAA );

DO_LOW_BYTE or DO_HIGH_BYTE

C/C++ Library • 45

printf( "The high byte is now 0xAA.\n" );

}

A more detailed example program is provided.
('DO_DEMO.C')

5.7 _8216_DA

@Description

This function is used to write data to D/A converters. There are two
Digital-to-Analog conversion channels on the ACL-8216. The
resolution of each channel is 12-bit, i.e. the range is from 0 to 4095.

@ Syntax

int _8216_DA(int da_ch_no, unsigned int data )

@ Argument

da_ch_no:

data:

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_InvalidDAChannel

@ Example

#include "8216.h"

main()
{

_8216_Initial( CARD_1, 0x220 );
/* Assume NoError when Initialize ACL-8216 */
/* If the hardware setting for DA output is 0~5V
*/

_8216_DA( CH_1 , 0x800 );
printf( "The output voltage of CH1 is 2.5V.\n" );
_8216_DA( CH_2 , 0xFFF );
printf( " The output voltage of CH2 is 5V.\n" );

}

A more detailed example program is provided.
('DA_DEMO.C')

D/A channel number

D/A converted value, if the value is

greater than 4095, the higher 4-bits
are negligent.

46 • C/C++ Library

5.8 _8216_AD_Input_Mode

@Description

This function is only useful for ACL-8216 ver. B series.This function is
used to set A/D input mode to single-ended or differential mode. The
default mode of A/D input is single-ended, so the A/D channel number
can be set between 0 to 15. If the A/D mode is set as differential, the
input channel can be selected from channel 0 to 7 only. You have to
call this function before the A/D operation is processed.

@ Syntax

int _8216_Input_Mode(int ad_mode )

@ Argument

ad_mode:

DIFFERENTIAL:

@ Return Code

ERR_NoError
ERR_BoardNoInit

@ Example

#include "8216.h"

main()
{
_8216_Initial( CARD_1, 0x210 );
/* Assume NoError when Initialize ACL-8216 */
_8216_Initial( CARD_2, 0x220 );
/* Assume NoError when Initialize ACL-8216 */

_8216_AD_Input_Mode( DIFFERENTIAL );
/* set analog input mode as “differential” mode
*/

/* if this function is not called, the default

input mode is single-ended mode */
_8216_Switch_Card_No(CARD_1);
_8216_AD_Input_Mode( SINGLE_ENDED );
…

_8216_AD_Set_Channel( 3 );
printf( " AD channel 3 is now selected.\n" );
…
/*the following A/D’s operation is based on
channel 3 */
}

SINGLE_ENDED:

the analog inputs are

single-ended mode

the analog inputs are

single-ended mode

C/C++ Library • 47

5.9 _8216_AD_Set_Channel

@ Description

This function is used to set AD channel by means of writing data to the
channel multiplexer register. There are 16 single-ended A/D channels
in ACL-8216, so the channel number should be set between 0 to 15
only. The initial state is channel 0 which is a default setting by the
ACL-8216 hardware configuration.

@ Syntax

int _8216_AD_Set_Channel( int ad_ch_no )

@ Argument

ad_ch_no:

conversion
Single-ended mode: Channel no. is from
0~15
Differential mode: Channel no. is from
0~7

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_InvalidADChannel

@ Example

#include “aclerr.h”
#include "8216.h"

main()
{

_8216_Initial( CARD_1, 0x220 );
/* Assume NoError when Initialize ACL-8216 */

_8216_AD_Set_Channel( 3 );
printf( "AD channel 3 is now selected.\n" );

/* the following A/D's operation is based on channel
3 */

}

channel number to perform AD

48 • C/C++ Library

5.10 _8216_AD_Set_Range

@ Description

This function is used to set the A/D range by means of writing data to
the A/D range control register. There are two factors will change the
analog input range- Gain and Input type. The Gain can be choice from
1,2,4 and 8. The initial value of gain is '1' which is set by the ACL-8216
hardware. The relationship between analog input range and gain is
specified by following tables:

Input
Range (V)

±5 V
±2.5 V
±1.25 V
±0.625 V

@ Syntax

int _8216_AD_Set_Range( int range_code )

@ Argument

range_code:

conversion, the possible values.

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_AD_InvalidGain

@ Example

#include "8216.h"

main()
{

_8216_Initial( CARD_1, 0x220 );
/* Assume NoError when Initialize ACL-8216 */

_8216_AD_Set_Range( 1 );
printf( "The A/D analog input range is +/-5V.\n" );
…
}

the programmable range of A/D

Gain Range

Code
X 1 0
X 2 1
X 4 2
X 8 3

C/C++ Library • 49

5.11 _8216_AD_Set_Mode

@ Description

This function is used to set the A/D trigger and data transfer mode by
means of writing data to the mode control register. The hardware
initial state of the ACL-8216 is set as AD_MODE_1 software( internal)
trigger with program polling data.

A/D Mode Description
AD_MODE_0 External Trigger, Software Polling

AD_MODE_1 Software Trigger, Software Polling
AD_MODE_2 Timer Trigger, DMA Transfer
AD_MODE_3 External Trigger, DMA Transfer
AD_MODE_4 External Trigger, Interrupt Transfer
AD_MODE_5 Software Trigger, Interrupt Transfer
AD_MODE_6 Timer Trigger, Interrupt Transfer
AD_MODE_7 Not Used

Note: The analog input mode selection should go with the hardware setting,

which is described in chapter 2.

@ Syntax

int _8216_AD_Set_Mode(int ad_mode )

@ Argument

ad_mode:

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_InvalidMode

@ Example

#include "8216.h"

main()
{

_8216_Initial( CARD_1, 0x220 );
/* Assume NoError when Initialize ACL-8216 */

_8216_AD_Set_Mode( AD_Mode_0 );
printf( "Now, disable internal trigger.\n" );
}

AD trigger and data transfer mode

50 • C/C++ Library

5.12 _8216_AD_Soft_Trig

@ Description

This function is used to trigger the A/D conversion by software. When
the function is called, a trigger pulse will be generated and the
converted data will be stored in the base address Base +4 and Base
+5.

@ Syntax

int _8216_AD_Soft_Trig( void )

@ Argument

None

@ Return Code

ERR_NoError
ERR_BoardNoInit

@ Example

#include "8216.h"

main()
{

_8216_Initial( CARD_1, 0x220 );
/* Assume NoError when Initialize ACL-8216 */

_8216_AD_Soft_Trig();
printf( "Now, AD is triggered.\n" );
.
.
_8216_AD_Acquire( &data);
}

C/C++ Library • 51

5.13 _8216_AD_Acquire

@ Description

This function will set the A/D mode as AD_MODE_1 (Software trigger,
Software polling), generate a software trigger to begin A/D conversion,
then poll the A/D conversion data. It reads the 16-bit A/D data until the
data is ready ('data ready' bit becomes low).

@ Syntax

int _8216_AD_Aquire( int *ad_data )

@ Argument

ad_data:

should within -32768 to 32767

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_AD_AquireTimeOut

@ Example

#include “aclerr.h”
#include "8216.h"

main()
{
intad_data;
intErrCode;

_8216_Initial( CARD_1, 0x220 );
/* Assume NoError when Initialize ACL-8216 */

/* Set to software trigger at first*/
/* then trigger the AD */
/* wait for AD data ready then read it */
ErrCode = _8216_AD_Aquire( &ad_data );

if( ErrCode == ERR_NoError )
printf( "The AD value is %d.\n", ad_data );
else
printf( "AD conversion error happen\n" );
}
Also see demo program ‘AD_DEMO.C’.

16-bit A/D converted value, the value

52 • C/C++ Library

5.14 _8216_CLR_IRQ

@ Description

This function is used to clear interrupt request which requested by the
ACL-8216. If you use interrupt to transfer A/D converted data, you
should use this function to clear interrupt request status, otherwise no
new coming interrupt will be generated.

@ Syntax

int _8216_CLR_IRQ( void )

@ Argument

None

@ Return Code

ERR_NoError
ERR_BoardNoInit

@ Example

#include "8216.h"

main()
{
intad_data;
intErrCode;
_8216_Initial( CARD_1, 0x220 );
/* Assume NoError when Initialize ACL-8216 */

_8216_CLR_IRQ();
/* clear IRQ if necessary */
}

C/C++ Library • 53

5.15 _8216_AD_DMA_Start

@ Description

The function will perform A/D conversion N times with DMA data
transfer by using the pacer trigger ( internal timer trigger). It will takes
place in the background which will not stop until the N-th conversion
has completed or your program execute _8216_AD_DMA_Stop()
function to stop the process. After executing this function, it is
necessary to check the status of the operation by using the function
_8216_AD_DMA_Status(). The function is performed on single A/D
channel with fixed gain. The sampling rate is 2 MHz/(c1xc2).

@ Syntax

int _8216_DMA_Start( int ad_ch_no, int ad_range,
intdma_ch_no, int irq_ch_no
int count , int *ad_buffer
unsigned int c1, unsigned int c2)

@ Argument

ad_ch_no:
ad_gain:

dma_ch_no:

irq_ch_no:

count:
ad_buffer:

c1:

the 16-bit timer frequency divider of

c2:

the 16-bit timer frequency divider of

@ Return Code

ERR_NoError
ERR_BoardNoInit, ERR_InvalidADChannel,

A/D channel number
A/D range value

Input Range (V) Gain Range Code

±10 V
±5 V
±2.5 V
±1.25 V

DMA channel number, DMA_CH_1 or

DMA_CH_3. This should be the same as
the setting of JP8 and JP9 on hardware.

IRQ channel number, used to stop DMA.

This should be the same as the setting
of JP7 on hardware.

the numbers of A/D conversion

the start address of the memory buffer

to store the AD data, the buffer size
must large than the number of AD
conversion.

timer channel #1

timer channel #2

X 1 0
X 2 1
X 4 2
X 8 3

54 • C/C++ Library

ERR_AD_InvalidGain, ERR_InvalidDMAChannel,
ERR_InvalidIRQChannel, ERR_InvalidTimerValue

@ Example

See demo program 'AD_Demo4.C'

C/C++ Library • 55

5.16 _8216_AD_DMA_Status

@ Description

Since the _8216_AD_DMA_Start function is executed in background,
you can issue the function _8216_AD_DMA_Status to check its
operation status.

@ Syntax

int _8216_AD_DMA_Status( int *status , int *count )

@ Argument

status:

0: AD DMA is not completed
1: AD DMA is completed

count:

transferred.

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_AD_DMANotSet

@ Example

See demo program 'AD_Demo4.C'

status of the DMA data transfer

the number of A/D data which has been

5.17 _8216_AD_DMA_Stop

@ Description

This function is used to stop the DMA data transfer. After executing
this function, the internal A/D trigger is disable and the A/D timer
( timer #1 and #2) is stopped. The function returns the number of the
data which has been transferred, no matter if the A/D DMA data
transfer is stopped by this function or by the DMA terminal count ISR.

@ Syntax

int _8216_AD_DMA_Stop( int *count )

@ Argument

count:

has been transferred.

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_AD_DMANotSet

@ Example

See demo program 'AD_Demo4.C'

the number of A/D converted data which

56 • C/C++ Library

5.18 _8216_AD_INT_Start

@ Description

The function will perform A/D conversion N times with interrupt data
transfer by using pacer trigger. It takes place in the background which
will not stop until the N-th conversion has completed or your program
execute _8216_AD_INT_Stop() function to stop the process. After
executing this function, it is necessary to check the status of the
operation by using the function 8216_AD_INT_Status(). The function
is perform on single A/D channel with fixed gain. The sampling rate is
2 MHz/(c1xc2).

@ Syntax

int _8216_INT_Start( int ad_ch_no, int ad_range,
int irq_ch_no, int count, int
*ad_buffer, unsigned int c1, unsigned int c2)

@ Argument

ad_ch_no:
ad_range:
irq_ch_no:

count:
ad_buffer:

store the A/D data, the buffer size

than the numbers of A/D conversion.

c1:

the 16-bit timer frequency divider of

c2:

the 16-bit timer frequency divider of

@ Return Code

ERR_NoError
ERR_Board_NoInit, ERR_AD_InvalidChannel,
ERR_AD_InvalidGain, ERR_InvalidIRQChannel,
ERR_InvalidTimerValue

@ Example

See demo program 'AD_Demo2.C'

A/D channel number

A/D range value
IRQ channel number used to transfer AD

data, the possible value is defined in
'8216.h'. This should be the same as
the setting of JP7 on hardware.

the numbers of A/D conversion

the start address of the memory buffer

to

must be large

timer channel #1

timer channel #2

C/C++ Library • 57

5.19 _8216_AD_INT_Status

@ Description

Since the _8216_AD_INT_Start() function is executed in background,
you can issue the function _8216_AD_INT_Status to check the status
of interrupt operation.

@ Syntax

int _8216_AD_INT_Status( int *status , int *count )

@ Argument

status:

0: A/D INT is completed
1: A/D INT is not completed

count:

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_AD_INTNotSet

@ Example

See demo program 'AD_Demo2.C'

status of the INT data transfer

current conversion count number.

5.20 _8216_AD_INT_Stop

@ Description

This function is used to stop the interrupt data transfer function. After
executing this function, the internal AD trigger is disable and the AD
timer is stopped. The function returns the number of the data which
has been transferred, no matter whether the AD interrupt data transfer
is stopped by this function or by the _8216_AD_INT_Start() itself.

@ Syntax

int _8216_AD_INT_Stop( int *count )

@ Argument

count:

transferred.

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_AD_INTNotSet

@ Example

See demo program 'AD_Demo2.C'

the numbers of A/D data which has been

58 • C/C++ Library

5.21 _8216_AD_Timer

@ Description

This function is used to setup the Timer #1 and Timer #2.

Timer #1 & #2 are used as frequency divider for generating constant
A/D sampling rate dedicatedly. It is possible to stop the pacer trigger
by setting any one of the dividers as 0. Because the AD conversion
rate is limited to the conversion time of the AD converter, the highest
sampling rate of the ACL-8216 can not be exceeded 100 KHz. Thus
the multiplication of the dividers must be larger than 20.

@ Syntax

int _8216_AD_Timer( unsigned int c1 , unsigned int
c2 )

@ Argument

c1: frequency divider of timer #1
c2: frequency divider of timer #2,

Note: The A/D sampling rate is equal to: 2MHz / (c1*c2), when c1 = 0 or

c2 = 0, the pacer trigger will be stopped.

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_InvalidTimerValue

@ Example

main()
{
intErrCode;

_8216_Initial( CARD_1, 0x220 );
/* Assume NoError when Initialize ACL-8216 */

_8216_AD_Timer( 10 , 10 );
/* set AD sampling rate to 2MHz/(10*10) */
_8216_AD_Timer( 0 , 0 );
/* stop the pacer trigger */
}

C/C++ Library • 59

5.22 _8216_Timer_Start

@ Description

The Timer #0 on the ACL-8216 can be freely programmed by the
users. This function is used to program the Timer #0. This timer can
be used as frequency generator if internal clock is used. It also can be
used as event counter if external clock is used. All the 8254 mode are
available.

@ Syntax

int _8216_Timer_Start( int timer_mode, unsigned int
c0 )

@ Argument

timer_mode:

values are:
TIMER_MODE0, TIMER_MODE1,
TIMER_MODE2, TIMER_MODE3,
TIMER_MODE4, TIMER_MODE5.

c0:

the counter value of timer

@ Return Code

ERR_NoError
ERR_BoardNoInit
ERR_InvalidTimerMode
ERR_InvalidTimerValue

@ Example

See demo program 'TMR_DEMO.C'

the 8253 timer mode, the possible

5.23 _8216_Timer_Read

@ Description

This function is used to read the counter value of the Timer #0.

@ Syntax

int _8216_Timer_Read( unsigned int *counter_value )

@ Argument

counter_value:

@ Return Code

ERR_NoError
ERR_BoardNoInit

@ Example

See demo program 'TMR_DEMO.C'

60 • C/C++ Library

the counter value of the Timer #0

5.24 _8216_Timer_Stop

@ Description

This function is used to stop the timer operation. The timer is set to the
'One-shot' mode with counter value ' 0 '. That is, the clock output
signal will be set to high after executing this function.

@ Syntax

int _8216_Timer_Stop( unsigned int *counter_value )

@ Argument

*counter_value: the current counter value of the
Timer #0

@ Return Code

ERR_NoError
ERR_BoardNoInit

@ Example

See demo program 'TMR_DEMO.C'

C/C++ Library • 61

6

Calibration & Utilities

In data acquisition process, how to calibrate your measurement devices to
maintain its accuracy is very important. Users can calibrate the analog input
and analog output channels under the users' operating environment for
optimizing the accuracy. This chapter will guide you to calibrate your ACL­8216 to an accuracy condition.

6.1 What do you need

Before calibrating your ACL-8216 card, you should prepare some
equipment’s for the calibration:

• Calibration program: After finishing the DOS software installation, a
utility program 8216util.exe exists in C:\ADLINK\8216\DOS\UTIL
directory. Once the program is executed, it will guide you to do the
calibration.

• A 6 1/2 digit multimeter ( 6 1/2 is recommended)

• A voltage calibrator or a very stable and noise free DC voltage

generator

62 • Calibration & Utilities

6.2 VR Assignment

There are five variable resistors (VR) on the ACL-8216 board to allow you
making accurate adjustment on A/D and D/A channels. The function of each
VR is specified as Table 6.1.

VR1 A/D bipolar offset adjustment
VR2 A/D full scale adjustment
VR3 D/A channel 1 full scale adjustment
VR4 D/A channel 2 full scale adjustment
VR5 A/D programmable amplifier offset adjustment
VR6 D/A reference voltage adjustment

Table 6.1 Function of VRs

6.3 A/D Adjustment

1. Set the analog input range as: +/- 10V, i.e. the gain = 1.

2. Short the A/D channel 0 ( pin 1 of CN3) to ground(GND), and connect
the TP1(+) and TP2(-) with your DVM. Trim the variable resister VR5
to obtain a value as close as possible to 0V. ( You have to keep
reading for A/D channel 0).

3. Applied a +10V input signal to A/D channel 1, and short the A/D CH0
to Analog ground( A.GND).

4. Trim VR1 until the reading of CH0 between 0000 ~ 0001(hex).

5. Trim VR2 until the reading of CH1 between 7FFE ~ 7FFF(hex).

6. Repeat step 4 and step 5, adjust until the reading values meet
requirements.

Note: When the user trims the VR1 and VR2, it will have side effect on the

D/A converted data, so repeat the step 4 and step 5 are very
important issue for A/D calibration.

Calibration & Utilities • 63

6.4 D/A Adjustment

There are two steps to calibrate the analog output channels, D/A 1 and D/A 2.
The first step is to adjust the reference voltage, and the second step is to
adjust each channel of D/A.

6.4.1 Reference Voltage Calibration

1. Set reference voltage as -5V ( the D/A reference voltage is selected
by JP1, see section 2.11).

2. Connect VDM (+) to CN3 pin-11 ( V.REF) and VDM(-) to GND.Trim
the variable resister VR6 to obtain -5V reading in the DVM.

Note: If the reference voltage set as -10V, the connection is the same as -

5V, but the reading from DVM should be -10V.

6.4.2 D/A Channel Calibration

D/A CH1 calibration:

1. Connect VDM (+) to CN3 pin-30 ( AO1) and VDM(-) to A.GND.

2. Write the digital value 0x0FFF into registers ( BASE+ 4 and BASE+

5)

3. Trim the variable resister VR3 to obtain +5V reading in the DVM.

D/A CH2 calibration:

1. Connect VDM (+) to CN3 pin-32 ( AO2) and VDM(-) to A.GND.

2. Write the digital value 0x0FFF into registers ( Base + 6 and + 7).

3. Trim the variable resister VR4 to obtain +5V reading in the DVM.

A calibration utility is supported in the software diskette which is included in
the product package. The detailed calibration procedures and description can
be found in the utility. Users only need to run the software calibration utility
and follow the procedures. You will get the accurate measure data.

64 • Calibration & Utilities

Appendix A Demo Programs

In the software CD, there are 8 demostration programs. These programs help
you to program the application by using C language Library easily. The
description of these programs are specified as following:

AD_DEMO1.C: A/D conversion uses software trigger and

program data transfer

AD_DEMO2.C: A/D conversion uses interrupt and program

data transfer
AD_DEMO3.C: A/D conversion uses DMA data transfer
AD_DEMO4.C: A/D conversion uses multiple channels and

input range programmable, triggers by PC

timer, and saves all data to a file

‘ad_demo4.dat’.
DA_DEMO.C: D/A Conversion
DI_DEMO.C: Read data from digital input channels
DO_DEMO.C: Write data to digital output channels
TMR_DEMO.C: Handle 8253 Timer/Counter

Demo Programs • 65

Warranty Policy

Thank you for choosing ADLINK. To understand your rights and enjoy all the
after-sales services we offer, please read the following carefully.

1. Before using ADLINK’s products please read the user manual and
follow the instructions exactly. When sending in damaged products for
repair, please attach an RMA application form which can be
downloaded from: http://rma.adlinktech.com/policy/.

2. All ADLINK products come with a limited two-year warranty, one year for
products bought in China.

• The warranty period starts on the day the product is shipped from

ADLINK’s factory.

• Peripherals and third-party products not manufactured by ADLINK

will be covered by the original manufacturers' warranty.

• For products containing storage devices (hard drives, flash cards,

etc.), please back up your data before sending them for repair.
ADLINK is not responsible for any loss of data.

• Please ensure the use of properly licensed software with our

systems. ADLINK does not condone the use of pirated software
and will not service systems using such software. ADLINK will not
be held legally responsible for products shipped with unlicensed
software installed by the user.

• For general repairs, please do not include peripheral accessories. If

peripherals need to be included, be certain to specify which items
you sent on the RMA Request & Confirmation Form. ADLINK is not
responsible for items not listed on the RMA Request & Confirmation
Form.

3. Our repair service is not covered by ADLINK's guarantee in the
following situations:

• Damage caused by not following instructions in the User's Manual.

• Damage caused by carelessness on the user's part during product

transportation.

• Damage caused by fire, earthquakes, floods, lightening, pollution,

other acts of God, and/or incorrect usage of voltage transformers.

• Damage caused by inappropriate storage environments such as

with high temperatures, high humidity, or volatile chemicals.

66 • Warranty Policy

• Damage caused by leakage of battery fluid during or after change

of batteries by customer/user.

• Damage from improper repair by unauthorized ADLINK technicians.

• Products with altered and/or damaged serial numbers are not

entitled to our service.

• This warranty is not transferable or extendible.

• Other categories not protected under our warranty.

4. Customers are responsible for all fees necessary to transport damaged
products to ADLINK.

For further questions, please e-mail our FAE staff: [e-mail]

Warranty Policy • 67