LFE2M50E-PS-EVN Lattice, LFE2M50E-PS-EVN Datasheet - Page 58

• Manufacturer Part Number: LFE2M50E-PS-EVN
• Description: Programmable Logic IC Development Tools LatticeECP2M PCI Express Dev Kit
• Manufacturer: Lattice

Specifications of LFE2M50E-PS-EVN

• Rohs: yes
• Tool Is For Evaluation Of: LatticeECP2M-50
• Factory Pack Quantity: 1

Running the PCI Express DMA Demos
Running the DMA Demos
LatticeECP2M PCI Express Development Kit User’s Guide
See the code links to the DMATest.cpp, ColorBars.cpp and ImageMove.cpp
files included with this kit. The source code is the best documentation of what
is really going on behind the scenes in the demos. To access this
documentation, go to the kit Software directory and open the
PCIeDocIndex.html document. Under the Documentation section click the
hyperlink, PCIe DMA Demo Reference Manual. Click on the File List book
in the navigation pane at left or the Files tab in the main pane on the page.
Note:
The PCIe SGDMA demo design requires at least 16 posted credits. This
requirement is to optimize the throughput of the PCIe link. You can determine
the amount of posted credits for the given slot using the PCIe Throughput
demo and GUI. If the posted credits are less than 32, then the PCIe SGDMA
demo will not be able to run in the given slot.
If you experience any problems running this demo, please refer to Appendix
B, “Troubleshooting” on page 63.
This section describes how to start running the DMA demos and refers you to
documentation on the demos that describes what these applications
demonstrate.
To run the ColorBars graphical DMA demo,
To run the ImageMove graphical DMA demo,
The 16-segment LED displays the real-time interrupt processing during
execution of the ColorBars and ImageMove. The inner eight segments are the
lower eight bits of the ISR routine counter. The outer eight segments are the
lower eight bits of the DPC routine counter, where real processing is done. All
segments (inner and outer) should be changing at a rapid rate during demo
operation (interrupts after each DMA transfer) indicating that the hardware is
operating and interrupts are being serviced.
From the Windows desktop, choose Start > Programs > LatticeECP2M
PCI Express Development Kit > ColorBars.
In this demo, image data is transferred from the solutions board to PC
memory and displayed. The ColorBars window displays a series of
vertical colored bars in a gradient manner. See Figure 15 below. For
details on this demo, see the section “PCIe DMA ColorBars Demo” on
page 52.
From the Windows desktop, choose Start > Programs > LatticeECP2M
PCI Express Development Kit > ImageMove.
In this demo, image data is transferred from the PC to the solutions board
and then back to the software, which then displays a modified image on
the screen. See Figure 16 below. For details on this demo, see the section
“PCIe DMA ImageMove Demo” on page 54
Running the DMA Demos
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