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Altera_Forum's avatar
Altera_Forum
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13 years ago

VIP issue

Hi, I'm working on a design based on VIP suite, in which I have a video signal coming from a camera that is mixed with a video signal from the VIP test pattern generator, using VIP Alpha blending mixer: everything works. If I replaced the VIP test pattern generator with a VIP module designed by myself, nothing works: the alpha blending mixer seems to detect a wrong frame format and the layer 1 is not visualized well. Using signal tap I can verify that the Avalon video streaming protocol of my module works fine. My question is: can I have a sample design for the source avalon video streaming to compare it with my own? I can attach the VHDL code if someone is interested

Thanx in advance

2 Replies

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

    please attach some code and the signaltapdata from your control-packet

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

    --- Quote Start ---

    please attach some code and the signaltapdata from your control-packet

    --- Quote End ---

    That's my state machine:

    process (av_reset,av_clk,state_streaming,av_st_ready,go_bit,width_val,height_val,blend_val,width_count,height_count)

    begin

    if (av_reset = '1') or (go_bit = '0') then

    --if (av_reset = '1') then

    width_count <= "0000000000000000";

    height_count <= "0000000000000000";

    av_st_data_sig <= X"0000";

    av_st_valid_sig <= '0';

    av_st_start_pack_sig <= '0';

    av_st_end_pack_sig <= '0';

    state_streaming <= SEND_ID_CONTROL_PACK;

    elsif (rising_edge(av_clk)) then

    case state_streaming is

    when SEND_ID_CONTROL_PACK =>

    av_st_data_sig <= X"00FF";

    av_st_end_pack_sig <= '0';

    if (av_st_ready = '1') then

    av_st_start_pack_sig <= '1';

    av_st_valid_sig <= '1';

    state_streaming <= SEND_CONTROL_1PACK;

    else

    av_st_start_pack_sig <= '0';

    av_st_valid_sig <= '0';

    state_streaming <= SEND_ID_CONTROL_PACK;

    end if;

    when SEND_CONTROL_1PACK =>

    av_st_data_sig <= "0000" & width_val_std(11 downto 8) & "0000" & width_val_std(15 downto 12);

    av_st_start_pack_sig <= '0';

    if (av_st_ready = '1') then

    av_st_valid_sig <= '1';

    state_streaming <= SEND_CONTROL_2PACK;

    else

    av_st_valid_sig <= '0';

    state_streaming <= SEND_CONTROL_1PACK;

    end if;

    when SEND_CONTROL_2PACK =>

    av_st_data_sig <= "0000" & width_val_std(3 downto 0) & "0000" & width_val_std(7 downto 4);

    av_st_start_pack_sig <= '0';

    if (av_st_ready = '1') then

    av_st_valid_sig <= '1';

    state_streaming <= SEND_CONTROL_3PACK;

    else

    av_st_valid_sig <= '0';

    state_streaming <= SEND_CONTROL_2PACK;

    end if;

    when SEND_CONTROL_3PACK =>

    av_st_data_sig <= "0000" & height_val_std(11 downto 8) & "0000" & height_val_std(15 downto 12);

    av_st_start_pack_sig <= '0';

    if (av_st_ready = '1') then

    av_st_valid_sig <= '1';

    state_streaming <= SEND_CONTROL_4PACK;

    else

    av_st_valid_sig <= '0';

    state_streaming <= SEND_CONTROL_3PACK;

    end if;

    when SEND_CONTROL_4PACK =>

    av_st_data_sig <= "0000" & height_val_std(3 downto 0) & "0000" & height_val_std(7 downto 4) ;

    av_st_start_pack_sig <= '0';

    if (av_st_ready = '1') then

    av_st_valid_sig <= '1';

    state_streaming <= SEND_CONTROL_5PACK;

    else

    av_st_valid_sig <= '0';

    state_streaming <= SEND_CONTROL_4PACK;

    end if;

    when SEND_CONTROL_5PACK =>

    --av_st_data_sig <= X"000" & "0011";

    av_st_data_sig <= X"000" & "0010";

    av_st_start_pack_sig <= '0';

    if (av_st_ready = '1') then

    av_st_valid_sig <= '1';

    av_st_end_pack_sig <= '1';

    --state_streaming <= SEND_ID_VIDEO_PACK;

    state_streaming <= WAIT1CYCLE;

    else

    av_st_valid_sig <= '0';

    av_st_end_pack_sig <= '0';

    state_streaming <= SEND_CONTROL_5PACK;

    end if;

    when WAIT1CYCLE =>

    av_st_start_pack_sig <= '0';

    av_st_valid_sig <= '0';

    av_st_end_pack_sig <= '0';

    state_streaming <= SEND_ID_VIDEO_PACK;

    when SEND_ID_VIDEO_PACK =>

    av_st_data_sig <= X"0000";

    av_st_end_pack_sig <= '0';

    --if (av_st_ready = '1') and (go_bit = '1') then

    if (av_st_ready = '1') then

    av_st_start_pack_sig <= '1';

    av_st_valid_sig <= '1';

    state_streaming <= SEND_VIDEO_PACK;

    else

    av_st_start_pack_sig <= '0';

    av_st_valid_sig <= '0';

    state_streaming <= SEND_ID_VIDEO_PACK;

    end if;

    when SEND_VIDEO_PACK =>

    av_st_data_sig <= X"1080"; --è il nero

    av_st_start_pack_sig <= '0';

    if (av_st_ready = '1') then

    width_count <= width_count + 1;

    av_st_valid_sig <= '1';

    else

    width_count <= width_count;

    av_st_valid_sig <= '0';

    end if;

    if ((width_count = (width_val - 1) ) and (height_count = (height_val - 1))) then

    av_st_end_pack_sig <= '1';

    else

    av_st_end_pack_sig <= '0';

    end if;

    if ((width_count = (width_val - 1) ) and (av_st_ready = '1')) then

    state_streaming <= CHECK_END_FRAME;

    else

    state_streaming <= SEND_VIDEO_PACK;

    end if;

    when CHECK_END_FRAME =>

    width_count <= "0000000000000000";

    av_st_valid_sig <= '0';

    av_st_start_pack_sig <= '0';

    av_st_end_pack_sig <= '0';

    if (height_count = (height_val - 1)) then

    --FRAME TERMINATO

    height_count <= "0000000000000000";

    state_streaming <= SEND_ID_CONTROL_PACK;

    else

    height_count <= height_count + 1;

    state_streaming <= SEND_VIDEO_PACK;

    end if;

    when others =>

    state_streaming <= SEND_ID_CONTROL_PACK;

    end case;

    end if;

    end process;