AMX DESIGN XPRESS-PROFESSIONAL V 1.1 - PROGRAMMER GUIDE Manual do Utilizador descarregar pdf (Página 19)

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7,213,061

B1

7

Referring

to

FIG.

6,

which

shows

a

?owchart

of

an

embodiment

of

a

process

150

in

which

a

command

entered

at

a

CAN

user

interface

is

delivered

to

a

content

provider

on

the

Internet

according

to

the

present

invention.

A

user

enters

data

on

a

user

interface

device

coupled

to

a

control

area

network,

as

shown

in

block

152.

The

user

interface

device

may

be

a

touch

panel

or a

computer

terminal

with

a

monitor,

keyboard

and

mouse,

for

example.

The

user

may

enter

an

alphanumeric

string,

click

on

a

button

icon

on

the

screen,

push

a

button

on

the

touch

panel,

or

effect

any

other

suitable

input.

The

data

entry

may

require the

user

to

also

submit

the

entered

data,

such

as

pushing

a

Submit

or

Enter

button,

as

shown

in

block

154.

The

user

interface

device then

forms

a

control

system

message

incorporating

the

entered

data

and

the

sender

and

recipient

of

the

message,

as

shown

in

block

156.

The

master

controller

then sends

the

message

onto

the

control

area

network,

as

shown

in

block

158.

The

sender

and

recipient

are

speci?ed

by

a

unique

combination

of system

ID

and

device

ID.

The

recipient

may

be

determined

by

the

data

entered

by

the

user.

For

example,

the

user

may

have

pushed

a

button

associated

with

updating

the

web

page

of

the

content

provider.

The

content

provider

is

previously

assigned

a

unique

combination

of system

ID

and

a

device

ID.

The

master

controller

on

that

network

receives

the

mes

sage

and

processes

the

message,

as

shown

in

block

160.

An

output

channel

state

associated

with

the

submit

button

of

the

user

interface

device

is

turned

ON

by

the

master

controller

to

indicate

that

the

data

is

being

sent.

The

ON

state

of

the

output

channel

of

the

submit

button

is

conveyed

to

the

user

interface,

which

may

highlight the

submit

button

or

display

a

predetermined

character

string

as

a

means

of

feedback

to

the

user.

In

block

164,

the

master

controller

then

forwards

the

message

to

the

protocol

converter

associated

with

the

recipient

software

logical

device

in

the

IA

server.

The

protocol

converter

then

translates

the

message

from

the

sender

protocol

to

the

recipient

protocol,

as

shown

in

block

166.

Note

that

protocol

conversion

is

not

necessary

or

is

null

if

the

sender

protocol

is

the

same

as

the

recipient

protocol.

In

block

168,

the

translated

message

is

then

sent

or

otherwise

conveyed

to

the

software

logical

device

that

represents the

recipient

convent

provider.

The

recipient

software

logical

device

receives

the

message and

stores

the

message

content

in

a data

structure

at

a

speci?c

location

speci?ed

by

an

index

value,

such

as

a

number,

which

corresponds

to

the

channel

number

of

the

recipient

software

logical

device,

as

shown

in

block

170.

The

stored

message

is

accessible

by

specifying

the

index

number.

The

software

logical

device then

changes

the

state

of

an

output

channel

of

the

same

channel

number

to

ON,

as

shown

in

block

172.

It

may

be

noted

that

each

device,

whether

physical

or

logical,

may

have

one

or

more

channels,

each

indicative

of

a

speci?c

function,

parameter

or

property.

Further,

each

channel

may

have an

input

and

an

output

channel

state.

Periodically

or

at

its

discretion,

the

recipient

Internet

application

checks

the

output

channel

states

of

the

software

logical

device

associated

therewith,

as

shown

in

block

174.

The

Internet

application

recogniZes

that

an

output

channel

state

is

ON

and

therefore the data

associated

with

that

channel

has

been

changed.

In

block

176,

the

Internet

appli

cation

queries the

software

logical

device

for

the

data

by

specifying

the

index

value.

In

response,

the

software

logical

device sends

the

message

to

the

Internet

application,

as

shown

in

block

178.

The

Internet

application

receives

the

message

and

uses

and

acts

according

to

the

data

in

an

appropriate

manner.

The

software

logical

device

turns

OFF

the

input

channel

state,

as

shown

in

block

182,

and

turns

ON

the

output

channel

state

of

the

same

index

value,

as

shown

in

block

184.

20

25

30

35

40

45

50

55

60

65

8

The

master

controller

recogniZes

a

change

in

the

input

channel

state

of

the

software

logical

device

representing the

Internet

application,

as

shown

in

block

186.

In

response,

the

master

controller

turns

OFF

the

output

channel

of

the

user

interface

device,

which

is

used

to

notify

the

user

that

the

requested

action

has

been

completed,

as

shown

in

block

188.

A

change

in

the

color

or

shade

of

the

displayed

button

or

the

display

of

a

predetermined

string

may

be

used

to

inform

the

user,

as

shown

in

block

190.

The

process

ends

in

block

192.

FIG.

7

is

a

?owchart

of

an

embodiment

ofa

process

200

in

which

an

Internet

application

functions

as

a

user

interface

in

the

control

system

according

to

the

teachings

of

the

present

invention.

In

block

202,

a

user

enters

and

submits

data

on

an

Internet

application.

The

Internet

application

may

be an

application

executing

on

a

web

server

of

a

web

content

provider,

a

web

browser,

or

any

other

suitable

Internet-based

application

program.

The

Internet

application

may

be

oper

able

to

receive

an

alphanumeric

string

entered

by

the

user,

the

activation

of

a

displayed

image

or

icon,

or

a

combination

of

keystrokes

entered

by

the

user.

The

Internet

application

then

requests

connection

to

the

control

system

by

specifying

an

IP

address

and

port

number

of

the

recipient

software

logical

device,

as

shown

in

block

204.

The

web

server

is

connected

with

the

Internet

application

and

receives

the

IP

message

containing

the

entered

data,

as

shown

in

block

206.

The

web

server

then

instantiates

one

or

more

processes

to

handle

the

received

message,

as

shown

in

block

208.

For

example,

a

CGI

process

may

be

provided

to

handle

CGI

scripts

or

an

ASP

process

may

be

provided

to

handle

ASP

scripts.

In the

case

of

a

web

browser

connecting

to

the

web

server,

the

instantiated

process

extracts

data

from

the

IP

message

received

from

the

Internet

application

and

forms

a

message

of

a

protocol

used

by

IA

server

14,

such

as

ICSP.

In the

case

of

a

content

provider

connecting

to

the

web

server,

the

message

is

preferably

already

in

the

form

of

a

ICSP

message

transported

by

IP,

which

does

not

require

protocol

conversion.

The

spawned

process

then sends

the

ICSP

message

to

the

software

logical

device

associated

with

the

recipient

device

in

the

control

system,

as

shown

in

block

210.

The

recipient

is

identi?ed

by

a

system

ID

and

a

device

ID.

The

software

logical

device then

stores

the

message

content

in

an

indexed

position

in

a

data

structure,

as

shown

in

block

212.

The

software

logical

device

turns

ON

the

input

channel

associated

with

the

index

number,

as

shown

in

block

214.

The

master

controller

becomes

aware

of

the

input

channel

state

change

by

periodically

polling the

channel

states,

as

shown

in

block

216.

The

master

controller

may

alternatively

be

triggered

to

query

the

channel

states

by

some

mechanism

other

than

time.

The

master

controller

then

requests

the

message

content

at

the

speci?ed

index

number

be

sent

to

it,

as

shown

in

block

218.

The

software

logical

device

then

sends

the

message

content

to

the

master

controller,

which

forwards

the

message

content

to

the

physi

cal

device

in

the

control

system,

as

shown

in

block

220.

The

device

receives

the data

and

acts

accordingly,

as

shown

in

block

222.

The

master

controller

may

also

send

the

same

data

to

a

user

interface

in

the

control

area

network

to

update

the

display,

as

shown

in

block

224.

The

software

logical

device

then

turns

OFF

the input

and

output

channels,

as

shown

in

block

226.

The

OFF

states

of

the

input

and

output

channels

noti?es

the

Internet

application,

which

may

peri

odically

poll

the

software

logical

device

to

determine

the

input

and

output

channel

states,

that

appropriate

action

has

been

taken

in

response

to

the

entered

data,

as

shown

in

block

228.

The

process

ends

in

block

230.

It

may

be

noted

that

the

use

of

input

and

output

channel

states

to

notify

the

recipient

that

data

is

available

and

the

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