Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Frame Reader configuration

Hi,

I use DE2 board and TERASIC TRDB_LTM (800x480 Touch LCD)

I attempt to build the following configuration:

NIOS2 that runs the program from SRAM: Works

LCD that is connected to Video Clocked Output IP that is fed from Frame Reader that reads the data from DE2 SDRAM.

The Video interface is configured to 3 planes 5 bit each, parallel. with resolution that is the same as the LCD.

If i connect Test Pattern Generator instead of Frame Reader, then i get the pattern.

If i connect Frame Reader I fail to get any picture.

I'm not sure regarding the configuration of the Frame Reader.

The SOPC configuration of the Frame Reader:

16 bit port.

max width:800

max height:480

parallel planes: 3

serial planes: 1

bits per color plane: 5

As far as i understand the configuration, there is 1 cycle per word.

so words per frame= cycles per frame=800*480=384000 am i correct?

what should i set in the interlacing register (i want to hold all the frame in one place)?

any insights regarding SDRAM configuration on DE2 board? (although i think it works fine)

Thanks in advance.

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    hi there,

    in the video imaging user guide is written the maximum size of the frame is 640X480, u should use a scaler if want a bigger picture...

    im also trying to run the frame buffer with nearly the same configurations but i also cant get an image.

    greets
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    use the frame reader in my design with the following settings:

    Bits per pixel per color plane: 8

    Number of color planes in parallel: 3

    Number of color planes in sequence: 1

    Maximum Image width: 1920

    Maximum Image height: 1080

    Master port width: 64

    Read master FIFO depth: 1024

    Read master FIFO burst target: 64

    Use separate clock for the Avalon MM master interface: unchecked

    Kindly confirm if the following calculations for number the words and the Single Cycle Color Patterns are true or not

    1- // Words

    IOWR(FRAMEREADER_BASE, 5, 259200); // (1920*1080*8*3)/48= 1036800

    2- // Single Cycle Color Patterns

    IOWR(FRAMEREADER_BASE, 6, 2073600); // 1920*1080=2073600 number of pixels in the frame