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Introduction

The DPCUTIL Dynamic Link Library (DLL)

provides an Applications Programming

Interface (API), allowing Digilent system

boards to communicate with applications

software running under Microsoft Windows on

a host computer.

When using DPCUTIL DLL a Digilent

Communication Module is requred to create a

communications channel between the host PC

and a system board. Digilent currently provides

communications modules supporting Ethernet,

USB 2.0, and Serial RS-232 communication

protocols.

The DPCUTIL API has functions for controlling

and communicating with the scan chain of

JTAG devices connected to a Digilent board.

The DPCUTIL API can also send and recieve

data to and from the user logic configured into

the gate array on a connected Digilent board.

The JTAG scan chain manipulation functions

are primarily for configuration of the

programmable logic devices in the scan chain.

The JTAG scan chain manipulation functions

can also be used to access to the boundary

scan registers in the device scan chain for

loading of test vectors, the read back of test

results, and other manipulations of the JTAG

scan chain supported by the attached devices.

The DPCUTIL data transfer functions require

that the gate array configuration contain a

parallel port interface compatible with the

Digilent Parallel Interface Module specification

and reference design, available on the Digilent

web site, at www.digilentinc.com. This

interface allows the user to define a set of

addressable registers that can be accessed by

the DPCUTIL data transfer API functions. The

data transfer API functions allow for writing or

reading a single register, writing or reading

sets of registers, or reading or writing a stream

of data into or out of a single register.

The DPCUTIL DLL was created and compiled

using the Microsoft C++ compiler in Visual

Studio 6. The API is defined as a set of C

callable functions, and can be used with

programs written in either C or C++. It is also

possible to write programs using Microsoft

Visual BASIC to access the DPCUTIL API

functions, but Digilent does not provide

technical support for this use.

Overview

The Components

In order to use any of the DPCUTIL API

functions, a program source module must

include the following header files in this order:

#include <windows.h>

#include “dpcdefs.h”

#include “dpcutil.h”

These header files should be placed in a

directory visible to the compiler. The files

should include a path for the development

environment that causes the compiler to

search the appropriate directory at compilation

time.

The program must be linked with the dpcutil.lib

library. This establishes the dynamic link

references between the application program

and the DPCUTIL dynamic link library. This

library file should be placed in a directory

visible to the linker and the linker library search

path set in the development environment to

cause the linker to search the appropriate

directory at program link time.

The DPCUTIL Dynamic Link Library

(dpcutil.dll) must be in a directory that is

searched by the operating system at program

run time. The DLL file should either be placed

in the same directory as the application

program, or in a directory that is listed on the

operating system PATH environment variable.

When a program is executed, the operating

system will look for dynamic link libraries in the

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Inhaltsverzeichnis

Seite 1 - Overview

DDiiggiilleenntt PPoorrtt CCoommmmuunniiccaattiioonnss PPrrooggrraammmmeerrss RReeffeerreennccee MMaannuuaall TM www.digilentinc.com Revision: 0

Seite 2

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 10 of 14 rgbRcv [0] TDO 8 TDO 7 TDO 6 TDO 5 TDO 4 TDO

Seite 3 - Manual

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 11 of 14 BOOL DpcGetReg(HANDLE hif, BYTE bAddr, BYTE *

Seite 4 - Description of API calls

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 12 of 14 rgbData[0], the data byte in the register specifi

Seite 5

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 13 of 14 Returns number of devices in the device table De

Seite 6 - 6 of 14

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 14 of 14 The following are error codes of type ERC and use

Seite 7 - API JTAG manipulation calls

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 2 of 14 directory where the program executable resides or

Seite 8 - 8 of 14

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 3 of 14 The Device Table All communication modules acces

Seite 9 - 9 of 14

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 4 of 14 HWND user specified window handle MSG WM_COMMAN

Seite 10 - DPCUTIL Programmer’s Manual

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 5 of 14 Description This function performs startup initia

Seite 11 - 11 of 14

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 6 of 14 Description Used to check a specified transaction

Seite 12 - API Device Manager calls

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 7 of 14 BOOL DpcGetDpcVersion (char * szVersion, ERC *per

Seite 13 - 13 of 14

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 8 of 14 rgbSend[0] TDI 8 TDI 7 TDI 6 TDI 5 TDI 4 TDI

Seite 14 - Type/Error Codes

Digilent, IncTM DPCUTIL Programmer’s Manual www.digilentinc.com © Digilent, Inc. Page 9 of 14 rgbSend[0] TMS 4 TDI 4 TMS 3 TDI 3 TMS 2 TDI

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