Example of work in command when
designing the digital systems
Card game Black Jack
Purpose of card play blackjack - to take a greater amount of spectacles.
Before the beginning of distribution of cards a player does a shutter coming from that
spectacles, which he ahs. Hereinafter he is given tow cards. Each card ahs its weight (2..10 nominal value; knave - 2, queen - 3; king - 4; ace - 11, but one of the aces possible to equal 1)
Play it is necessary to take an amount of cards, weight which more than beside the croupier, but
not more than 21. Under the equal amount of spectacles, but smaller than 22, croupier wins.
In the event of the advantage of player an amount of spectacles increases on the size of rate, in
the event of the advantage a croupier decreases. At the loss both - stays unchangeable.
Each strolled in the automaton a coin enlarges an amount of spectacles of player on 10.
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Gomel State University
NIT Labs
IEESD-2000/HLCCAD
Creation an interactive
environment for debugging
Game automate model will consist of two main blocks:
 specialised terminal BJTerminal
Information from
 synthesised digital block BJMain
keyboard
And also two auxiliary
devices:
• pulser GEN
• generator of random
digits RND
Information for
display
Specialised terminal BJTerminal
Create terminal model by HLL
Delphi source text of
terminal model
Exterior of terminal
• button panel
• display
Structural of device BJMain
Cards
BJCards
Game control
BJControl
Come a conclusion to split BJMain on 6 blocks:

BJControl - control game state: exchange
cards, distribution cards, stop game

BJCards - keeps information about cards
(sequences of cards), can exchange cards and
distribution their
Croupier
BJComputer

BJBank - keeps amount spectacles taken by player
and rate size

BJSummer - defines optimal weight cards taken by
player

BJComputer - defines optimal weight cards taken
by croupier and comes a conclusion about next step

BJChecker - defines winner of game
Player
BJSummer
Who is winner
BJChecker
Bank
BJBank
Scheme of device BJMain
Game control
BJControl
Cards
BJCards
Bank
BJBank
Croupier
BJComputer
Player
BJSummer
Who winner
BJChecker
Draft design
For each blocks create model
on HLL
Modelling device
BlackJack
Obtain correct working
all devices in
accordance with
specification
Packet debugging
environment
Generation of test file
on interactive
modelling results
Packet test of project
on generated test file
Functional design



Select 6 groups of developments.
Stand each of blocks from device
BJMain in separate file.
Take task for groups: presents
blocks as synthesised combination
of device from library ”Standard”.
Library of
synthesised device
Main
project
System ensures possibility to
develop only its part of the
project and modelling whole
project!
Separate project with
block BJCards
Portioned designing
Workstation
Project server
BlackJack.prj
BJControl.prj
BJComputer.prj
BJSummer.prj
BJBank.prj
BJChecker.prj
BJCadrs.prj
On the project server
kept devices, received
in step of draft
designing.
To workstation is
copied part of project,
subjecting functional
designing given by
group of developers.
Modelling system consists of two part:
• BJCards - project under development at workstation
BJCadrs.prj
• all other components of systems which kept on project
server
Principal design
Result of functional design a block
BJCards
Automatic generation synthesised by
VHDL descriptions device BJMain
describe
Contacts
New Information Technologies Laboratories
(NIT Labs)
Gomel Fr. Skarina State University
Belarus
E-mail: [email protected]
WWW: http://nit.gsu.unibel.by