Digilent Atlys Podręcznik referencyjny - Strona 4

Przeglądaj online lub pobierz pdf Podręcznik referencyjny dla Sprzęt komputerowy Digilent Atlys. Digilent Atlys 19 stron. Circuit board

Atlys Reference Manual

In addition to the navigation bar, browse and program buttons, the Config interface provides an

Initialize Chain button, console window, and status bar. The Initialize Chain button is useful if for some

reason USB communications with the board have been interrupted. The console window displays

current status, and the status bar shows real-time progress when downloading a configuration file.

Flash Interface

The Flash programming application allows .bin,

.bit, or .mcs configuration files to be transferred

to the on-board SPI Flash ROM for FPGA

programming, and also user data files to be

transferred to/from the Flash at user-specified

addresses.

The configuration tool supports programming

from any valid ROM file produced by the Xilinx

tools. After programming, board power must be

cycled to program the FPGA from the SPI

Flash. If programming with a .bit file, the startup

clock must be set to CCLK.

The Read/Write tools allow data to be

exchanged between files on the host PC and

specified address ranges in Flash.

Test Interface

The test interface provides a quick and easy

way to verify many of the board's hardware

circuits and interfaces. These are divided into

two major categories: on-board memory (DDR2

and Flash) and peripherals. In both cases, the

FPGA is configured with test and PC-

communication circuits, overwriting any FPGA

configuration that may have been present.

Clicking the Run RAM/Flash Test button will

perform a walking '1' test on the DDR2 memory

and verify the IDCODE in the SPI Flash.

Clicking the Start Peripherals Test button will

initialize GPIO and user I/O testing. Once the

indicator near the Start Peripherals Test button

turns green, all peripheral tests can be run. The

"Test Shorts" feature checks all discrete I/O's

for shorts to Vdd, GND, and neighboring I/O

pins. The switches and buttons graphics show

the current states of those devices on the Atlys

board. Each button press will drive a tone out

of the LINE-OUT or HP-OUT audio connectors.

Doc: 502-178

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