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PCI CD/CDa Configurable DMA Interface User’s Guide About the Software and Firmware

EDT, Inc. May 2007 5

an FPGA, you can load the appropriate firmware on it by running the command mezzload, which

determines the appropriate firmware for the specific mezzanine board in your system.

For example:

bitfile: ssd16io.bit

command_reg: 0x08

byteswap: 1

run_command: set_ss_vco -F 1000000 2

run_command: mezzload

For complete usage details, enter

initpcd --help.

C source for

initpcd is included so that you can add your own commands, if you wish. You can then

edit your own software initialization file to use your new commands and specify that

initpcd use your

new file when configuring your board. If you would like us to include your new software initialization

commands in subsequent releases of

initpcd, send mail to [email protected].

Sample Applications and Utilities

Along with the driver, the FPGA configuration files, and the software initialization files, the software CD

includes a number of applications and utilities that you can use to initialize and configure the board,

access registers, or test the board. For many of these applications and utiilities, C source is also

provided, so that you can use them as starting points to write your own applications. The most

commonly useful are described below; see the README file for the complete list.

NOTE Software is updated regularly; the latest versions are available on our website at

www.edt.com/software.html. We encourage you to use the latest versions for new installations.

For existing applications, upgrade only if you have a specific reason to do so.

Sample Applications

rd16 Performs simple multichannel ring buffer input.

wr16 Performs simple multichannel ring buffer output.

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

interruptions, depending on system performance.

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 PCI CD/CDa to specific

frequencies used by the UI FPGA for input and output.

Utility Files

initpcd A utility for initializing and configuring the PCI CD/CDa.

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