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SPEC7
Commit 8dd8f713 authored by Pascal Bos's avatar Pascal Bos
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Start counting from 2000 instead of 1970. 

Gave credit where credit was due.
parent 63951dff
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    hdl/top/spec7_ref_design/spec7_wr_ref_top.vhd
    View file @ 8dd8f713
    ......@@ -82,7 +82,7 @@ entity spec7_wr_ref_top is
    g_simulation : integer := 0;
    g_use_pps_in : string := "single";
    g_refclk_tune_pos_slope : boolean := TRUE;
    g_irig_b_enable : boolean := FALSE
    g_irig_b_enable : boolean := TRUE
    );
    port (
    ---------------------------------------------------------------------------`
    ......
    hdl/top/spec7_ref_design/wr_irigb_conv.vhd
    View file @ 8dd8f713
    ......@@ -6,6 +6,7 @@
    -------------------------------------------------------------------------------
    -- File : wr_irigb_conf.vhd
    -- Author(s) : Pascal Bos <bosp@nikhef.nl>
    -- Author(s) : Bas Jansweijer
    -- Company : Nikhef
    -- Created : 2021-04-29
    -- Last update: 2021-05-04
    ......@@ -211,7 +212,7 @@ pps_trigger <= '1' when pps_i = '1' and pps_reg = '0' else '0';
    -- ______ ___________ _________________
    -- --------->| |---------------->| |-------------->| Multiply by 4 |------------------------------------------
    -- Days | +365 | | DIVIDE BY |(Answer) | (bit shift 2) | _|_ _|_ _|_ _|_
    -- | | | 1461 | |_________________| |+ 0|-->year|+ 1|-->year|+ 2|-->year|+ 3|-->year
    -- | | | 1461 | |_________________| |+ 0|-->year|+ 1|-->year|+ 2|-->year|+ 3|-->year (+29 years) (to start in 2000 instead of 1969)
    -- |______| | |------------ ________ |___| |___| |___| |___|
    -- | |(Remainder) | / <365 |-----------0 | | |
    -- |___________| | / | | | | |
    ......@@ -310,16 +311,16 @@ begin
    remaining_days := unsigned(remainders(3));
    block_4_years := unsigned(quotients(3));
    if remaining_days < 365 then
    years <= std_logic_vector((block_4_years(37 downto 0) & "00") + 29);
    years <= std_logic_vector((block_4_years(37 downto 0) & "00") - 1);
    days <= std_logic_vector(remaining_days(8 downto 0)+1);
    elsif remaining_days < 730 then
    years <= std_logic_vector((block_4_years(37 downto 0) & "00") + 30);
    years <= std_logic_vector((block_4_years(37 downto 0) & "00") + 0);
    days <= std_logic_vector(remaining_days(8 downto 0)-365+1);
    elsif remaining_days < 1095 then
    years <= std_logic_vector((block_4_years(37 downto 0) & "00") + 31);
    years <= std_logic_vector((block_4_years(37 downto 0) & "00") + 1);
    days <= std_logic_vector(remaining_days(8 downto 0)-730+1);
    else
    years <= std_logic_vector((block_4_years(37 downto 0) & "00") + 32);
    years <= std_logic_vector((block_4_years(37 downto 0) & "00") + 2);
    days <= std_logic_vector(remaining_days(8 downto 0)-1095+1);
    end if;
    all_rdy(3) := '1';
    ......
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