LFE2M50E-PS-EVN Lattice, LFE2M50E-PS-EVN Datasheet - Page 61

• 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
LatticeECP2M PCI Express Development Kit User’s Guide
The image data is 1MB in size. Each DMA Read request is 1MB in size. After
the hardware has transferred the pixel data, the API call returns and the
software displays the image. This loop is repeated over and over. The data
rate (frame rate) is displayed in the window title bar. The frame rate is roughly
the throughput rate in MB/sec. (each frame = 1 MB). Frame rate is governed
by the video refresh rate. Most video systems will not draw frames into video
memory faster than the frame rate (waste of operations).
To see what key commands are available for the ColorBars demo, refer to the
table below:
Table 12: DMA ColorBars Demo Keyboard Commands
Key command
<Esc>
<F1>
<F2>
<F3>
<F4>
<Space>
Description
Terminates program and closes the window.
Draw blank image buffer only (do not generate data).
This is the fastest rate,
Generate ColorBars data with the software. This will
usually be slowest data rate.
Get image data from solutions board from DMA
transfer.
Draw a frame each second (slowly) so it can be viewed
and the changes are visible.
Pause/resume image transfer.
PCIe DMA ColorBars Demo
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