DK-MAXII-1270N Datasheet DK-MAXII-1270N | P28-P30

2–20 Development Kit Version 1.1.0 Altera Corporation

MAX II Development Kit Getting Started User Guide July 2005

Reference Designs

Note that LED8 remains lit. If this LED is off while the PC

application is idle, an error has occurred. Close the port,

reset the board by pressing S1, and re-open the port. If the

PC application stops responding, disconnect the USB cable

from the board. If that doesn’t solve the problem, you will

have to use the Task Manager in Windows to end the PC

application manually.

7. Using the demo:

Perform the following tests on the USB Reference Design user

interface (see Figure 2–6).

a. Check the LEDs—Click on the LEDs and note that they turn on

and off on the board as they do in the GUI.

b. Write to the LCD—Type some text into the Liquid Crystal

Display text box and click Write to LCD. The same text appears

in the LCD display on the board.

c. Write to the SRAM—First use Notepad to create a text file and

Save the file on your hard drive. In the USB_Utility GUI, click

the Browse button near the SRAM Interface. Browse to the file

you just created. Make sure the default encoding list box says

“ASCII” and click Write to SRAM.

d. Read from the SRAM—First check that the Default Encoding list

box says “ASCII” and then click Read SRAM. Make sure the

SRAM contents text box shows the data that you typed into

your Notepad file. Note that when you read from the SRAM, a

file called SRAMDataBack.txt is created in the same directory

where the USB_Utility.exe file resides. This file is re-created

each time you read from the SRAM. It contains the addresses

and the data read from those addresses.

1 SRAMDataBack.txt must not be open when you try to read

from the SRAM.

Altera Corporation Development Kit Version 1.1.0 2–21

July 2005 MAX II Development Kit Getting Started User Guide

Getting Started

e. Read the UFM—The UFM is arranged as 256 locations, each

containing 32 bits of data. Currently residing in the UFM is the

inverse of each address. Set the default encoding to

Hexadecimal and click Read UFM. The data displayed should

be FFFF FFFE FFFD FFFC FFFB and so forth. You can recompile

this design with a different memory initialization file (MIF) to

change the data in the UFM. Note that when you read from the

UFM, a file called UFMDataBack.txt is created in the same

directory where the USB_Utility.exe file resides. This file is

re-created each time you read the UFM. It contains the

addresses and the data read from those addresses.

1 UFMDataBack.txt must not be open when you read from

the UFM.

f. Display the board temperature and push button counts—Press the

S2, S3, and S4 buttons on the board. Note that each time a

button is pressed, the corresponding text box on the GUI

increments. Also note that the board temperature is updated

each time a switch is pressed.

1 The SRAM and UFM read/write options only read or write

384 bytes at a time. This data is always written to or read from

the 384 lowest address locations.

Understanding the Functionality of the USB Reference Design

The USB Reference Design has two pieces:

■ Verilog code written to dictate the functionality of the MAX II device

■ Visual Basic code to control the PC application

The MAX II design consists entirely of state machines. Each individual

design file contains a state machine to control the reading/writing of each

component. These files contain extensive comments and designers are

encouraged to look through the Verilog code to gain a complete

understanding of how the MAXII design functions. The Director.v code

constantly awaits for one of two things to happen: either a button is

pressed or data arrives from the PC. If a button is pressed, the Director

enables the PassivesInterface.v, which takes over control of the output to

the USB MAC FIFO and writes the values of the Switch Counters and

Temperature blocks. If data is received from the PC, then the Director

passes control to the UFMInterface.v, the SRAMInterface.v, or the

LCDInterface.v, depending on the value of the data received. Refer to the

Verilog code itself for more details on the operation of this MAX II design.

2–22 Development Kit Version 1.1.0 Altera Corporation

MAX II Development Kit Getting Started User Guide July 2005

Reference Designs

The Visual Basic project consists of the GUI and various pieces of code

that control the transmission and reception of data and control characters

to and from the MAX II board. All data is interpreted based on which

command buttons are pressed. After a command button is pressed, it is

disabled until the PC receives data for the corresponding component.

When this data is received, the PC interprets it based on which command

button is disabled and then processes it appropriately. After all data has

been processed, the command button is enabled again.

The Visual Basic project relies heavily on drivers provided by Future

Technology Devices International (FTDI), the company that

manufactures the USB MAC. FTDI has several drivers available on their

web site along with bits of Visual Basic code, C code, and documentation.

Designers looking to interface to a PC in the same manner as this

application are advised to investigate the driver solutions provided by

FTDI. This application is formed around FTDI’s Virtual COM Port

drivers. These drivers essentially mimic a COM port on the PC, making

the sending and receiving of data relatively easy.

The board is set up so that users can implement designs based on the

other drivers provided by FTDI, but this does require a hardware

modification—the footprint labeled J10 is for an EEPROM socket that can

be added to the board and then populated with the designer’s choice of

EEPROMs. This EEPROM then allows designers to set the USB Product

ID and Vendor ID, as well as allowing for USB 1.1 or USB 2.0 (High Speed)

interfaces to be developed.

Reference Design 2: The Slot Game Reference Design

The MAX II Slot Game Reference Design highlights the high density of

the MAX II device. The reference design uses approximately 1050 logic

elements during implementation This total logic cell usage is equivalent

to roughly 800 macrocells in the legacy MAX architecture. Legacy MAX

devices contained a maximum of 512 macrocells, making designs such as

this impossible to implement without purchasing multiple devices.

Using the Slot Machine Reference Design

The MAX II Slot Game Reference Design is based on standard

casino-style slot machine behavior. It uses a linear feedback shift register

to determine the values of three simulated slot reels on the MAX II

board’s LCD. A player controls the progress of the game using three

buttons on the MAX II board.

The object of the game is to build a total bankroll of $1000 or more by

using three levels of wagering. The game is initiated by hitting the Bet

button (S2), at which time the player is given a default total of $199. By

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P30 P31-P33 P34-P36 P37-P38

DK-MAXII-1270N

Mfr. #:

Buy DK-MAXII-1270N

Manufacturer:

Intel / Altera

Description:

Programmable Logic IC Development Tools CPLD Development Kit For EPM1270F256

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet

DK-MAXII-1270N