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Altera_Forum's avatar
Altera_Forum
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15 years ago

video image processing: ALPHA BLENDING MIXER init

Hi,

somebody knows what is exact sequence to do to control alpha blending mixer output?

I tried with system console in my board : these are TCL commands:

(mixer's addreass are 0x00 - 0x1ff)

set mast [lindex [get_service_paths master] 0]

open_service master $mast

master_write_16 $mast 0x004 0 ;# OFFSET X VIDEO 1

master_write_16 $mast 0x006 0 ;# OFFSET Y VIDEO 1

master_write_16 $mast 0x008 0 ;# LAYER VIDEO 1 SWITCH OFF

master_write_16 $mast 0x00a 0 ;# OFFSET X VIDEO 2

master_write_16 $mast 0x00c 0 ;# OFFSET Y VIDEO 2

master_write_16 $mast 0x00e 0 ;# LAYER VIDEO 2 SWITCH OFF

master_write_16 $mast 0x010 0 ;# OFFSET X VIDEO 3

master_write_16 $mast 0x012 0 ;# OFFSET Y VIDEO 3

master_write_16 $mast 0x014 0 ;# LAYER VIDEO 3 SWITCH OFF master_write_16 $mast 0x016 0 ;# OFFSET X VIDEO 4

master_write_16 $mast 0x018 0 ;# OFFSET Y VIDEO 4

master_write_16 $mast 0x01A 0 ;# LAYER VIDEO 4 SWITCH OFF

master_write_16 $mast 0x01C 0 ;#

master_write_16 $mast 0x01E 0 ;#

master_write_16 $mast 0x020 0 ;# LAYER VIDEO 5 SWITCH OFF

master_write_16 $mast 0x022 0 ;#

master_write_16 $mast 0x024 0 ;#

master_write_16 $mast 0x026 0 ;# LAYER VIDEO 6 SWITCH OFF

master_write_16 $mast 0x00E 1 ;# LAYER VIDEO 2 SWITCH ON master_write_16 $mast 0x000 1 ;# GO

This sequence doesn't run.

Why?

Somebody can help me?

G

3 Replies

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

    Hi,

    I think the mixer is using "Native" alignment. Did you already try using offsets with an increment of 4?

    OFFSET X VIDEO 1 = 0x08

    OFFSET Y VIDEO 1 = 0x0C

    LAYER VIDEO 1 ACTIVE = 0x10

    OFFSET X VIDEO 2 = 0x14

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

    Yes,

    I tried but without result.

    There is something not clear.

    Did You use VIP in the past?

    Have You some example?

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

    Hi,

    I do not think you will find an example of using the Video IP with SystemeConsole.

    The example design is a relatively simple system with a mixer controlled from a NiosII:

    https://www.altera.com/support/software/download/refdesigns/broadcast/dnl-post-process.jsp.

    This is the 9.1 example design and I believe the 10.0 will be published soon.

    There are many reasons which could cause the mixer not to produce any output (I assume this is the issue there? Did you use SignalTap already?) and it is quite easy to create a deadlock with the core if you are not careful. As far as I can tell your startup sequence seems right so you will have to describe your system in more details to get more help.