Upravljacki racunarski sistemi

5/22/2018 Upravljacki racunarski sistemi

1/10

Racunarski bazirani upravljacki sistemi

4.1

.

.

4.1

.

.

,s(t))

.

.

,

.


2/10

Akvizacija I Kondicioniranje podataka

(Data Acquisition System)

,

.

.

,

,

.

.

.

A/D

(AnalogtoDigital

Converter)

, .

A/D

.

,

,

.

A/D

.

,

.

(Tranducers).

Kondicioniranje

.

A/D ,

.

A/D .

. ,

,

.

,

.

,

.


3/10

Analogno/digitalna konverzija

,

,

.

/ .

.

4.6a 4.6b.

: / ,

4.6a;

, 4.6b.

/

4.6b.,

/

,

,

A/D.


4/10

Analogno/digitalna konverzija

4.8 A/D

A/D 4.8

,

:

;

Sample and Hold S/H; A/D Start; A/D

.

A/D

A/D

.

.

.


5/10

4.2.1 RS232

,

. DTE (Data Terminal Equipment) DCE (Data Communication

Equipment) .

, DTE , DCE

, .

,

. EIA (Electronic

Industries Association)

RS-232C, . RS-232

. DB25 , 4.10.

4.2.


6/10

USB

USB

4.14.

USB , PCI ,

(host controller)

USB .

, . USB

:

USB ,

,

.

(root hub)

,

5V .

( ) ,

(hub) USB .

, USB

,

2-8

USB .

( ). :

,

,

,

,

,

,

/

500mA (100mA ),

500,

3ms,

() ,

.


7/10

Tipovi prenosa kod USB-a

:

(interrupt transfer),

USB .

, ,

.

,

( )

.

(bulk transfer)

,

.

, ,

.

, .

(isochronous transfer)

. /

. ,

( )

.

(control transfer)

, USB

, . USB

, /

.

.

:

, , ,

,

, .


8/10

USB po hiearhiskom nivou

( 4.17).

(Client SW)

USB ,

/ USB.

, USB

,

. USB ,

.

. ,

,

. (message

pipe)

.

. USB

IRP (I/O Request Packet),

. USB

,

.

.

, . (token)

,

(handschake)

. : ,

CRC .


9/10

USB

USB

.

,

.

B, USB .

.

USB , (

). ( 4.19).

USB , 5m

.

,

, , ,

.

.

,

.

,

NRZI .


10/10

4.4

.

.

,

/

.

4.12.

(. ), / ,

.

.

, I2C Bus RS-232/RS-485

.

,

(self diagnostics), (self

identification) (self adaptation).

(DSP).

.

, .

.

VLSI (Very Large Scale Integrated)

,

,

.

.

Upravljacki racunarski sistemi

Documents

Transcript of Upravljacki racunarski sistemi