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----------------------------------------------------------------------------------
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-- Company:
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-- Engineer:
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--
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-- Create Date: 11:17:05 07/02/2012
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-- Design Name:
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-- Module Name: apb_lfr_time_management - Behavioral
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-- Project Name:
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-- Target Devices:
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-- Tool versions:
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-- Description:
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--
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-- Dependencies:
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--
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-- Revision:
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-- Revision 0.01 - File Created
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-- Additional Comments:
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--
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----------------------------------------------------------------------------------
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LIBRARY IEEE;
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USE IEEE.STD_LOGIC_1164.ALL;
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USE IEEE.NUMERIC_STD.ALL;
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LIBRARY grlib;
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USE grlib.amba.ALL;
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USE grlib.stdlib.ALL;
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USE grlib.devices.ALL;
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LIBRARY lpp;
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USE lpp.apb_devices_list.ALL;
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USE lpp.lpp_lfr_time_management.ALL;
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ENTITY apb_lfr_time_management IS
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GENERIC(
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pindex : INTEGER := 0; --! APB slave index
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paddr : INTEGER := 0; --! ADDR field of the APB BAR
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pmask : INTEGER := 16#fff#; --! MASK field of the APB BAR
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pirq : INTEGER := 0; --! 2 consecutive IRQ lines are used
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masterclk : INTEGER := 25000000; --! master clock in Hz
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otherclk : INTEGER := 49152000; --! other clock in Hz
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finetimeclk : INTEGER := 65536 --! divided clock used for the fine time counter
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);
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PORT (
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clk25MHz : IN STD_LOGIC; --! Clock
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clk49_152MHz : IN STD_LOGIC; --! secondary clock
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resetn : IN STD_LOGIC; --! Reset
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grspw_tick : IN STD_LOGIC; --! grspw signal asserted when a valid time-code is received
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apbi : IN apb_slv_in_type; --! APB slave input signals
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apbo : OUT apb_slv_out_type; --! APB slave output signals
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coarse_time : OUT STD_LOGIC_VECTOR(31 DOWNTO 0); --! coarse time
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fine_time : OUT STD_LOGIC_VECTOR(31 DOWNTO 0) --! fine time
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);
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END apb_lfr_time_management;
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ARCHITECTURE Behavioral OF apb_lfr_time_management IS
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CONSTANT REVISION : INTEGER := 1;
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--! the following types are defined in the grlib amba package
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--! subtype amba_config_word is std_logic_vector(31 downto 0);
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--! type apb_config_type is array (0 to NAPBCFG-1) of amba_config_word;
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CONSTANT pconfig : apb_config_type := (
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--! 0 => ahb_device_reg (VENDOR_LPP, LPP_ROTARY, 0, REVISION, 0),
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0 => ahb_device_reg (19, 14, 0, REVISION, pirq),
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1 => apb_iobar(paddr, pmask));
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TYPE apb_lfr_time_management_Reg IS RECORD
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ctrl : STD_LOGIC_VECTOR(31 DOWNTO 0);
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coarse_time_load : STD_LOGIC_VECTOR(31 DOWNTO 0);
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coarse_time : STD_LOGIC_VECTOR(31 DOWNTO 0);
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fine_time : STD_LOGIC_VECTOR(31 DOWNTO 0);
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next_commutation : STD_LOGIC_VECTOR(31 DOWNTO 0);
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END RECORD;
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SIGNAL r : apb_lfr_time_management_Reg;
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SIGNAL Rdata : STD_LOGIC_VECTOR(31 DOWNTO 0);
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SIGNAL force_tick : STD_LOGIC;
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SIGNAL previous_force_tick : STD_LOGIC;
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SIGNAL soft_tick : STD_LOGIC;
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SIGNAL reset_next_commutation : STD_LOGIC;
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BEGIN
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lfrtimemanagement0 : lfr_time_management
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GENERIC MAP(masterclk => masterclk, timeclk => otherclk, finetimeclk => finetimeclk)
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PORT MAP(master_clock => clk25MHz, time_clock => clk49_152MHz, resetn => resetn,
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grspw_tick => grspw_tick, soft_tick => soft_tick,
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coarse_time_load => r.coarse_time_load, coarse_time => r.coarse_time, fine_time => r.fine_time,
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next_commutation => r.next_commutation, reset_next_commutation => reset_next_commutation,
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irq1 => apbo.pirq(pirq), irq2 => apbo.pirq(pirq+1));
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PROCESS(resetn, clk25MHz, reset_next_commutation)
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BEGIN
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IF resetn = '0' THEN
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r.coarse_time_load <= x"80000000";
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r.ctrl <= x"00000000";
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r.next_commutation <= x"ffffffff";
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force_tick <= '0';
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previous_force_tick <= '0';
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soft_tick <= '0';
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ELSIF reset_next_commutation = '1' THEN
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r.next_commutation <= x"ffffffff";
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ELSIF clk25MHz'EVENT AND clk25MHz = '1' THEN
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previous_force_tick <= force_tick;
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force_tick <= r.ctrl(0);
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IF (previous_force_tick = '0') AND (force_tick = '1') THEN
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soft_tick <= '1';
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ELSE
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soft_tick <= '0';
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END IF;
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--APB Write OP
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IF (apbi.psel(pindex) AND apbi.penable AND apbi.pwrite) = '1' THEN
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CASE apbi.paddr(7 DOWNTO 2) IS
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WHEN "000000" =>
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r.ctrl <= apbi.pwdata(31 DOWNTO 0);
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WHEN "000001" =>
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r.coarse_time_load <= apbi.pwdata(31 DOWNTO 0);
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WHEN "000100" =>
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r.next_commutation <= apbi.pwdata(31 DOWNTO 0);
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WHEN OTHERS =>
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r.coarse_time_load <= x"00000000";
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END CASE;
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ELSIF r.ctrl(0) = '1' THEN
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r.ctrl(0) <= '0';
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END IF;
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--APB READ OP
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IF (apbi.psel(pindex) AND (NOT apbi.pwrite)) = '1' THEN
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CASE apbi.paddr(7 DOWNTO 2) IS
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WHEN "000000" =>
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Rdata(31 DOWNTO 24) <= r.ctrl(31 DOWNTO 24);
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Rdata(23 DOWNTO 16) <= r.ctrl(23 DOWNTO 16);
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Rdata(15 DOWNTO 8) <= r.ctrl(15 DOWNTO 8);
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Rdata(7 DOWNTO 0) <= r.ctrl(7 DOWNTO 0);
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WHEN "000001" =>
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Rdata(31 DOWNTO 24) <= r.coarse_time_load(31 DOWNTO 24);
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Rdata(23 DOWNTO 16) <= r.coarse_time_load(23 DOWNTO 16);
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Rdata(15 DOWNTO 8) <= r.coarse_time_load(15 DOWNTO 8);
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Rdata(7 DOWNTO 0) <= r.coarse_time_load(7 DOWNTO 0);
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WHEN "000010" =>
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Rdata(31 DOWNTO 24) <= r.coarse_time(31 DOWNTO 24);
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Rdata(23 DOWNTO 16) <= r.coarse_time(23 DOWNTO 16);
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Rdata(15 DOWNTO 8) <= r.coarse_time(15 DOWNTO 8);
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Rdata(7 DOWNTO 0) <= r.coarse_time(7 DOWNTO 0);
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WHEN "000011" =>
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Rdata(31 DOWNTO 24) <= r.fine_time(31 DOWNTO 24);
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Rdata(23 DOWNTO 16) <= r.fine_time(23 DOWNTO 16);
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Rdata(15 DOWNTO 8) <= r.fine_time(15 DOWNTO 8);
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Rdata(7 DOWNTO 0) <= r.fine_time(7 DOWNTO 0);
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WHEN "000100" =>
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Rdata(31 DOWNTO 24) <= r.next_commutation(31 DOWNTO 24);
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Rdata(23 DOWNTO 16) <= r.next_commutation(23 DOWNTO 16);
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Rdata(15 DOWNTO 8) <= r.next_commutation(15 DOWNTO 8);
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Rdata(7 DOWNTO 0) <= r.next_commutation(7 DOWNTO 0);
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WHEN OTHERS =>
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Rdata(31 DOWNTO 0) <= x"00000000";
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END CASE;
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END IF;
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END IF;
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apbo.pconfig <= pconfig;
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END PROCESS;
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apbo.prdata <= Rdata WHEN apbi.penable = '1';
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coarse_time <= r.coarse_time;
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fine_time <= r.fine_time;
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END Behavioral;
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