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Altera_Forum's avatar
Altera_Forum
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15 years ago

delay

hello,

i have a little question for you, guys....how can i put a delay between two if instructions (the second if to be executed after a few seconds)..........the code is in verilog.

thx, tastax

2 Replies

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

    --- Quote Start ---

    hello,

    i have a little question for you, guys....how can i put a delay between two if instructions (the second if to be executed after a few seconds)..........the code is in verilog.

    thx, tastax

    --- Quote End ---

    Use counter.

    // very simpy without reset.

    reg [7:0] cnt;

    always @ (posedge clk) begin

    cnt <= cnt + 1'b1;

    if(condition1 && (cnt == 7'h0))begin ..... end

    if(condition2 && (cnt == 7'h3))begin ..... end

    if(condition3 && (cnt == 7'h13))begin ..... end

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

    we have reset, also. The code is:

    always@(posedge iCLK or negedge iRST_n)

    begin

    if (!iRST_n) begin

    pattern_data <= 8'h00;

    cnt <= 0;

    r1<=0;

    r2<=0;

    r3<=0;

    r4<=0;

    r5<=0;

    r6<=0;

    r7<=0;

    r8<=0;

    r9<=0;

    nr1<=0;

    nr2<=0;

    nr3<=0;

    nr4<=0;

    nr5<=0;

    nr6<=0;

    nr7<=0;

    nr8<=0;

    nr9<=0;

    culoare<=1;

    once1<=0;

    once2<=0;

    once3<=0;

    once4<=0;

    once5<=0;

    once6<=0;

    once7<=0;

    once8<=0;

    once9<=0;

    cul1<=0;

    cul2<=0;

    c1<=0;

    c2<=0;

    c3<=0;

    c4<=0;

    c5<=0;

    c6<=0;

    c7<=0;

    c8<=0;

    c9<=0;

    end

    else if((x_cnt>(Hsync_Blank-1))&&(x_cnt<(H_LINE-Hsync_Front_Porch)))

    begin

    pattern_data <= graycnt;

    red_1 <= pattern_data;

    green_1 <= 0;

    blue_1 <= 0;

    cnt <= cnt + 1'b1;

    if ((iY_COORD>100)&&(iY_COORD<1370)&&(iX_COORD>100)&&(iX_COORD<1353)&&(x_cnt>750)&&(x_cnt<1010)&&(y_cnt>358)&&(y_cnt<511)) begin

    r1<=1;

    r2<=1;

    if ((once1 == 1'b0)&&(culoare<=9)) begin

    culoare<=culoare+1;

    nr1<=culoare;

    once1=1'b1;

    nr2<=culoare+1;

    if (culoare%2==1) begin

    cul1<=cul1+1;

    c1<=1;

    end

    else if(culoare%2==0) begin

    cul2<=cul2+1;

    c1<=2;

    end

    end

    end

    if ((r1)&&(x_cnt>750 )&&(x_cnt<1010)&&(y_cnt>358)&&(y_cnt<511)) // r1 "if"

    begin

    if ((nr1%2==1)) begin

    pattern_data <= 200;

    blue_1 <= pattern_data;

    end

    else if ((nr1%2==0)&&(nr1!=0)) begin

    pattern_data <= 200;

    green_1 <= pattern_data;

    end

    end

    if ((iY_COORD>1371)&&(iY_COORD<2677)&&(iX_COORD>100)&&(iX_COORD<1353)&&(x_cnt>485)&&(x_cnt<742)&&(y_cnt>358)&&(y_cnt<511)) begin

    r2<=1;

    if ((once2 == 1'b0)&&(culoare<=9)) begin

    culoare<=culoare+1;

    nr2<=culoare;

    once2=1'b1;

    if (culoare%2==1) begin

    cul1<=cul1+1;

    c2<=1;

    end

    else if(culoare%2==0) begin

    cul2<=cul2+1;

    c2<=2;

    end

    end

    end

    if ((r2)&&(x_cnt>485)&&(x_cnt<742)&&(y_cnt>358)&&(y_cnt<511)) // r2 "if"

    begin

    if (nr2%2==1) begin

    pattern_data <= 200;

    blue_1 <= pattern_data;

    end

    else if ((nr2%2==0)&&(nr2!=0)) begin

    pattern_data <= 200;

    green_1 <= pattern_data;

    end

    end

    end

    between the r1 "if" and r2 "if" we have to produce a delay.

    thx