Real Time Devices DM400 Manuale utente

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Instra

DM40OlDMs400

UsertsManual

ffi RealrimeDevices,

Inc.

"Accessing

theAnalogW

orld',

DM400/DM5400

Userts

Manual

ffi

REAL

TIMEDEVICES,

INC.

PostOffice

Box906

StateCollege,

Pennsylvania

16804

Phone:

(814\234-8087

FAX:

(81a)

234-5218

Published

Real

TimeDevices.Inc.

P.O.

Box906

StateCollege,PA 16804

Time

Devices,Inc.

All rightsreserved

hintedin

U.S.A.

IIt 18t96

INTRODUCTION

Digital+o-Analog

Conversion

(-2

Module)....... ..................i-3

WhatComes

Application

Software

CHAPTER 1 - MODULE SETTINGS ...................1.1

Factory-Configured

Switch

andJumperSettings ...............1-3

- 8254Timer/Counter

Sources

(Factory

Settings:See

Tablel-1& Figure

l-2) ......................................l-4

- Intemrpt

Channel

Select

(Factory

Setting:JumperG;Intemrpt

Channel

Disabled) .........1-5

- DMA Request/DMA

AcknowledgeChannel

(Factory

Setting:

Disabled) ........................

l-6

- Analog

InputVoltageRangeandPolarity

(Factory

Setting:t5 volts) .........1-7

- DAC I Output

VoltageRange

(Factory

Setting:+5to

-5

volts)........... ........1-7

- DAC2OutputVoltageRange

(Factory

Setting:+5to

-5

volts)........... ........1-7

Sl - BaseAddress

(Factory

Setting:

300hex

(768

decimal))

................. ..............1-8

Pull-up/Pull-down

ResistorsonDigital

VOLines ..............1-9

Gx,Resistor

CHAPTER2 -INSTALLATION ........2.I

Connecting

the

AnalogInput

Pins ............24

Connecting

the

TriggerInand

TriggerOutPins,CascadingModules ....................2-4

Connecting

the

AnalogOutputs

(2 Module) .................2-6

Connecting

the

Timer/Counters

and

Digital

VO............... ..................2-6

Runningthe540ODIAG

Diagnostics

Program ...................2-6

CHAPTER 3 _ HARDWARE DESCRIPTION

Digital

VO,Progmmmable

Peripheral

Interface...... ......'....3-5

i-l

3-1

Thbleof Contents

CHAPTER 4 - MODTILE OPERATION AND PROGRAMMING ..........4.I

BA +0: ReadStatus/StartConvert

(Read/Write) .........4-4

BA + l: Read

A/DData/Update

DACOutputs

(ReadAVrite)

................... .............4-4

BA+2:

BA +3: Scan/Burst

@ead/lVrite) ............4-5

BA +4: PPI

PortA - DigitalVO

(ReadAVrite)

.............. .................4-5

BA+

5: PPI

Port

B- Channel/Board

Functions

Select

(ReadAVrite)

.............. .........................4-5

BA+6: PPI

Port

- Digital

(Read/Write)

................ ...............4-6

BA+7: 8255

PPI

Control

Word

(Write

Only)........... .......................4-6

BA+8: 8254

Timer/Counter

0(Read/lVrite)

................. ...................4-8

BA+9: 82!4Timer/Counter

I (Read/Write)

................. ...................4-8

BA+ l0: 8254

Timer/Counter2@ead/Write)

................. .................4-8

BA+ l1: 8254Control

Word

(Write

Only)........... .......4-8

BA+ 12:D/AConverter

I LSB

(Write

Only)

........... ........................4-9

BA+ 13:

D/A

ConverterI MSB

(Write

Only)........... .......................4-9

BA + 14:Clear

IRQ

Status/D/A

Converter

2LSB

(Read/Write)

............. ..............4-9

BA + 15:Clear

DMADone

Flag/D/AConverter2MSB

(Read/lVrite) .................4-9

Clearingand

SettingBits

aPort........... ....................4-10

Initializing

Enabling

and

Disabling

theExternal

Trigger ........'.4-13

Enablingand

DisablingIntemrpts ......4-13

Startingan

A./DConversion ................4-15

MonitoringConversion

Status

(DMADoneor

End-of-Convert)............... .......4-15

Reading

the

Converted

Data ...............4-16

Programmingthe

PacerClock

.......... .......................4-1'l

What

8259

Programmable

Intemtpt

Controller '....'....'......4-18

IntemrptMask

(IMR) .......'...4-18

End-of-Intemrpt

(EOI)

Command ......4-18

WhatExactly

Happens

Whenan

IntemrptOccurs? .'.....'.............4-18

Using

Interrupts

inYour

Programs

........... .-.----........4'19

Writingan

IntemrptService

Routine

(ISR)............ ...'.'................4-19

Saving

the

StartupIntemrpt

Mask

(IMR)andIntemrpt

Vector .....-....4-20

Restoring

the

Startup

IMR andIntemrpt

Vector .....4'21

Common

Interrupt

Mistakes ...............4-21

Data

Transfers

Using

Choosinga

DMAChannel ...'..............4-21

Allocating

aDMABuffer ...-.-.-.---...-...4-21

Calculating

thePageand

Offset

ofa

Buffer .......'....4-22

Setting

the

DMA Page

DMAMask

DMA Mode

Programming

the

DMA Controller ..-..4-25

Programming

the

400/5400

forDMA..... ................'4-25

Monitoringfor

DMADone............ .....4-25

CommonDMAProblems............... ....4-26

ExampleProgramsandFlowDiagrams ......4-29

Single

ConvertFlowDiagram

(Figure

4-8).............. ....................4-31

DMAFlowDiagram

@gure

4-9).............. .............4-32

Interrupts

Flow

Diagram

(Figure

4-10)

........... ........4-33

D/AConversionFlowDiagram

(Figure

4-11)............ ..................4-34

CHAPTER5 - CALIBRATION

BipolarRangeAdjustments:

-5

+5Volts............ ........................5-5

BipolarRange

Adjustments:

-10

+10Volts............ ....................5-6

APPENDX A-4OOI54OOSPECIFICATIONS ......A.1

APPENDX B -P2 CONNECTOR

PIN ASSIGNMENTS B-1

c-l

D-1

APPENDX C- COMPONENTDATA SIMETS

APPENDX D _ WARRANTY ..........

tIt

l-1

1-2

l-3

t-4

1-5

l-6

1-7

l-8

l-9

1-10

1-11

t-12

1-13

t-14

2-l

2-3

3-l

4-l

4-2

4-3

4-4

4-5

4-6

4-7

4-8

4-9

4-10

4-ll

5-1

ModuleLayout

ShowingFactory-ConfiguredSettings................... ...............1-3

8Z54Timer/Counter

Sources

Jumpers,P3................ .................1-4

8254TimerlCounter

Circuit

BlockDiagram ........1-5

IntemrptChannel

SelectJumper,

P4.............. ......l-6

PullingDown

theIntemrpt

Request

Line............. .....................1-6

DMARequest/DMA

AcknowledgeChannelJumper,

P5................ ..............1-6

AnalogInput

Range

and

PolarityJumper,

P6................ ............1-7

DAC1

Output

Voltage

RangeJumper,

............. ...................1-7

DAC2Output

Voltage

Range

Jumper,

............. ...................1-7

BaseAddress

Switch,Sl ................ ,.....................1-8

Pull-up/Pull-down

ResistorCircuitry ...................1-9

Adding

Pull-upsand

Pull-downstoDigital

VOLines .............1-10

Gain

Circuitry

and

FormulasforCalculating

Gxand

f ................... ......'..'...1-l

Diagram

forRemoval

ofSolder

Short............ ....1-12

PZVOConnector

PinAssignments

............. ...'.....2'4

Single-Ended

InputConnections

............ .".'.'.......2-5

Cascading

Two

BoardsforSimultaneous

Sampling .................2-5

4C{lll54C[

Block

Diagram ...'.'.......'...3-3

8254

Programmable

Interval

Timer

Circuit

Block

Diagram -.-.-3-4

A/D

Conversion

TimingDiagram,

AllModes.... .'...........".'....4-13

Timing

Diagram,

SingleConversion

............ .-....4-14

Timing

Diagram,

Multiple

Conversions .............4-14

Timing

Diagram,

Channel

Scanning...... .....'.......4-15

Timing

Diagram,

Burst........... .-.-.-.4-15

Pacer

Clock

Block

Diagram ...----.-..4'17

8254

Programmable

Interval

TimerCircuit

BlockDiagram .'.4-27

Single

Conversion

FlowDiagram ...'..'........""""4-31

DMAFlow

Diagram ..............""""4-32

Interrupts

Flow

Diagram .....'..""""4-33

D/AConversion

Flow

Diagram .....4-34

List ofIllustrations

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