CDA CD 60 Podręcznik Użytkownika Pobierz pdf (Strona 8)

Configuring the PCD8 PCD8 8-bit DMA Interface User’s Guide

5 EDT, Inc. May 2007

simple_write

Performs DMA output without using ring buffers. Data is therefore subject to

interruptions, depending on system performance.

simple_getdata Serves as an example of a variety of DMA-related operations, including reading the

data from the connector interface and writing it to a file, as well as measuring input

rate.

simple_putdata Serves as an example of a variety of DMA-related operations, including reading

data from a file and writing it out to the connector interface.

test_timeout Under normal operation, timeouts cancel DMA transfers. This application

exemplifies giving notification when a timeout occurs, without canceling DMA

set_ss_vco A utility for programming the output clock or clocks on the PCD8 to specific

frequencies used by the UI FPGA for input and output.

Utility Files

initpcd A utility for initializing and configuring the PCD8.

pdb Utility application that enables interactive reading and writing of the PCI SS/GS UI

FPGA registers.

Testing Files

A variety of files — C source, executables, and FPGA configuration files — are available to test the

boards. Their uses are described in the documents listed under the heading Testing Procedures. They

include at least:

sslooptest Tests most PCI SS- and PCI GS-based boards. Determines the board model and

selects the loopback test to run, then runs it.

xtest Tests the PCI CD and CDa boards, and the single-channel DMA interface for the

PCI SS and PCI GS main boards.

Building Applications

Executable and PCD source files are at the top level of the EDT PCD driver distribution directory. If

you need to rebuild an application, therefore, run

make in this directory.

Windows and Solaris users must install a C compiler. For Windows, we recommend the Microsoft

Visual C compiler; for Solaris, the Sun WorkShop C compiler. Linux users can use the

gcc compiler

typically included with your Linux installation. If Solaris or Windows users wish to use

gcc, contact

[email protected].

After you’ve built an application, use the

--help command line option for a list of usage options and

descriptions.

Configuring the PCD8

For the PCD8 to operate as you require, it must be loaded with the appropriate FPGA configuration

files for both FPGAs. The PCI FPGA is loaded from flash ROM, which is shipped from the factory

already loaded with the appropriate FPGA configuration file; however, you must load the UI FPGA

yourself.

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