അപേക്ഷാ കുറിപ്പ് AC295
IGLOO-VIDEO-BOARD DVI Input to LCD
റഫറൻസ് ഡിസൈൻ
Demonstration Objective
The Digital Video Interface (DVI) Input to LCD reference design setup (Figure 1) demonstrates an IGLOO® FPGA as an LCD controller for a 7-inch display. The timing generator logic inside the IGLOO FPGA transmits all the necessary LCD data to the panel (RGB and control signals). It receives data from the DVI Receiver chip and processes the data to drive the LCD.
മെറ്റീരിയലുകൾ
In addition to showing the LCD as a desktop for the monitor, you can also show video clips on the screen, such as video trailers. Some trailers can be found here for download: www.davestrailerpage.co.uk/.
പ്രോജക്റ്റ് ഡൗൺലോഡ് ചെയ്യുക files for this reference design from the Micro semi SoC Products Group webസൈറ്റ്:
- For NEC 5.5” LCD – www.actel.com/download/rsc/?f=IVDK_DVItoLCD_320x240_NEC_DF.
- For Toshiba 7” LCD – www.actel.com/download/rsc/?f=IVDK_DVItoLCD_800x480_Toshiba_DF.
Download programming files for this reference design from the Micro semi SoC Products Group webസൈറ്റ്: www.actel.com/download/rsc/?f=IVDK_DVItoLCD_RefDes_PF.
ഹാർഡ്വെയർ
- IGLOO-VIDEO-BOARD
- LCD adapter board:
– 5.5” NEC 320×240 LCD board (LCD-Adapter-NL3224BC35-20)
– 7.0” Toshiba 800×480 LCD board (LCD-Adapter-LT070A320F) - DVI-D കേബിൾ
- 12 V power supply (should supply 1-2 Amps of power)
- A source for DVI-D video*
കുറിപ്പ്: It is important to get a true digital source. Some examples of a true digital source are a laptop that drives DVI-D output directly, a laptop docking station, and HDMI output. An example of a non-true digital source is a VGA-to-DVI cable converter.
സോഫ്റ്റ്വെയർ
ഒന്നുമില്ല
ഡിസൈൻ Files
Figure 2 shows the design hierarchy and components used in the design.
Devices Used for this Demo
DVI-D Receiver: focus.ti.com/docs/prod/folders/print/tfp201a.html
2Mx32 SDRAM: download.micron.com/pdf/datasheets/dram/sdram/64MSDRAMx32.pdf
IGLOO FPGA: www.actel.com/documents/IGLOO_HB.pdf
FPGA Utilization
Description and Block Diagram
When the IGLOO Video Demo Kit is programmed with the DVI Input to LCD reference design, the board is configured to act as a DVI monitor as it grabs sub-frames from the source video at 60 frames per second through frame grabber. The frame buffer controller inside the FPGA takes care of the source image storage and pulling out images from the SDRAM for LCD consumption. The video timing generator blocks produce the necessary timing control signals, such as HSYNC, VSYNC, display enable, and display pixel clock, for the end LCD.
Adapter Connection and LCD Data Connection
The LCD adapter board mounts onto the IGLOO-VIDEO-BOARD via the 50-pin connector. This should be straight forward.
Make sure the LCD flex cable is mounted onto its connector, as shown in Figure 4.
Demonstration Instructions
- Connect the LCD adapter board to the IGLOO-VIDEO-BOARD.
- Make sure the LCD flex cable is connected to its slot.
- Connect the 12 V power source to the IGLOO-VIDEO-BOARD. The LCD should show a blue screen.
- Program the IGLOO with the DVI-to-LCD STAPL file.
കുറിപ്പ്: Use only the programming file dedicated to the LCD adapter board resolution. - Provide the IGLOO-VIDEO-BOARD a digital source via the DVI-D input connector.
Laptop Instructions
If using a laptop with NVIDIA graphic chip, the following instructions apply.
- In Windows, select Control Panel > Display > Settings tab. Set the resolution to 800×600 or 1024×768.
- Click the Advanced button to display the Multiple Monitors tab.
- In this window, there is a tab for the NVIDIA graphic card control panel. In Figure 6 it is the Quadro NVS 110M tab.
- Select the NVIDIA graphic card tab (Figure 7) to access the button for starting the NVDIA Control Panel.
- Select the Display icon.
- After selecting the Display icon, various display options are shown. Under Multiple Displays, select Change display configuration. If this option is not available, the graphic card does not support multiple displays.
- Select the NVIDIA Multi-Display Setup Wizard. This wizard option will only appear if the graphic card detected more than one display. This means that your IGLOO-VIDEO-BOARD must be powered and connected to the computer via the DVI interface. If one of the options shown is Attodyne IVDK, this indicates that the graphic card has recognized the IGLOO Video Development Kit. Select Laptop Display as the primary display and click Next.
- In the NVIDIA n View Display Mode window, select Clone for the display mode and click Next.
Now the laptop monitor and the LCD should display the same image.
- If the image on the LCD is fuzzy or flickering, select Change flat panel scaling in the NVIDIA control panel.
- Select the Attodyne IVDK icon at the top and make sure Do not scale is selected.
പതിവുചോദ്യങ്ങൾ
What is the cause of a pitch black LCD?
A pitch black LCD indicates that power is not applied to the LCD, thus the backlight is not turned on.
Please check to make sure the power is applied.
If power is applied and the screen is still pitch black, make sure the LCD adapter board is pin-aligned with the video board’s 50-pin connector. Make sure the edge is lined up with the left triangle found on the socket.
Finally, if all of the above conditions check out and the LCD is still pitch black, the LCD’s backlight or backlight inverter may be broken. Acquire another LCD adapter board and try the demonstration again.
What does it mean to get a gray screen on the LCD?
A gray screen on the LCD indicates the LCD backlight has received power, but no power to the LCD yet.
Please make sure the flex cable is connected to the socket as indicated in Figure 14.
What does it mean to get a blue screen on the LCD?
A blue screen on the LCD, as shown in Figure 15, indicates there is no LCD data driven, but the LCD has received power. To solve this problem, provide the board a DVI-D input.
The Run Multiple Display Wizard is not found. Why?
Make sure the Video LCD board is connected to the video source via the DVI-D cable. The laptop or computer must be able to detect the board information via the DVI. If the cable is connected, but still not able to drive multiple display, chances are the graphic card does not support multiple display.
Why does the image flicker so much on the LCD?
A flickering or fuzzy image indicates that the LCD is not getting correctly timed data. This may be caused by a computer or laptop that is trying to scale to match the resolution of the LCD. Make sure to turn the scaling off. See Steps 9-10 under “Laptop Instructions” section.
മാറ്റങ്ങളുടെ പട്ടിക
ഡോക്യുമെന്റിന്റെ ഓരോ പുനരവലോകനത്തിലും വരുത്തിയ നിർണായക മാറ്റങ്ങൾ ഇനിപ്പറയുന്ന പട്ടിക പട്ടികപ്പെടുത്തുന്നു.
| പുനരവലോകനം* | Changes Pa | പേജ് |
| പുനരവലോകനം 1 (ഏപ്രിൽ 2011) |
Updated links for the Project and Programming Files in the section “Materials”(SAR 31318) | 2 |
| Added a section on “Design Files”. (SAR 31318) | 2 |
കുറിപ്പ്: *ഹൈഫന് ശേഷമുള്ള പാർട്ട് നമ്പറിലാണ് റിവിഷൻ നമ്പർ സ്ഥിതി ചെയ്യുന്നത്. ഡോക്യുമെന്റിന്റെ അവസാന പേജിന്റെ ചുവടെ ഭാഗം നമ്പർ പ്രദർശിപ്പിക്കും. സ്ലാഷിന് ശേഷമുള്ള അക്കങ്ങൾ പ്രസിദ്ധീകരണത്തിന്റെ മാസവും വർഷവും സൂചിപ്പിക്കുന്നു.
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Microsemi IGLOO-VIDEO-BOARD DVI Input To LCD Reference Design [pdf] ഉപയോക്തൃ ഗൈഡ് DVItoLCD RefDes AN, IGLOO-VIDEO-BOARD DVI Input To LCD Reference Design, IGLOO-VIDEO-BOARD DVI, Input To LCD Reference Design, LCD Reference Design, Reference Design, Design |