105 lines
2.4 KiB
VHDL
105 lines
2.4 KiB
VHDL
-- See the file "LICENSE" for the full license governing this code. --
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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 work;
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USE work.lt16soc_peripherals.ALL;
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USE work.wishbone.ALL;
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USE work.wb_tp.ALL;
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USE work.config.ALL;
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ENTITY timer_tb IS
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END ENTITY;
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ARCHITECTURE sim OF timer_tb IS
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constant CLK_PERIOD : time := 10 ns;
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signal clk : std_logic := '0';
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signal rst : std_logic;
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signal data : std_logic_vector(WB_PORT_SIZE-1 downto 0);
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signal interrupt : std_logic;
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signal slvi : wb_slv_in_type;
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signal slvo : wb_slv_out_type;
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BEGIN
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SIM_SLV: wb_timer
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generic map(
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memaddr => CFG_BADR_TIMER,
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addrmask => CFG_MADR_TIMER
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)
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port map(
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clk => clk,
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rst => rst,
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wslvi => slvi,
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wslvo => slvo,
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interrupt => interrupt
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);
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clk_gen: process
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begin
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clk <= not clk;
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wait for CLK_PERIOD/2;
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end process clk_gen;
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stimuli: process
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begin
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rst <= '1';
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wait for CLK_PERIOD;
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rst <= '0';
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wait for CLK_PERIOD;
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wait for CLK_PERIOD;
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wait for CLK_PERIOD;
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-- Configure timer...
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data <= (others => '0');
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data(0) <= '1'; -- enable
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data(1) <= '1'; -- repeat
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generate_sync_wb_single_write(slvi,slvo,clk,data, ADR_OFFSET => 4);
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wait until interrupt = '1';
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wait for CLK_PERIOD*20;
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-- Read counter value
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data <= (others => '0');
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generate_sync_wb_single_read(slvi,slvo,clk,data);
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wait for CLK_PERIOD*4;
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-- Disable repeat and reset timer...
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data <= (others => '0');
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data(1) <= '0'; -- repeat
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data(2) <= '1'; -- reset
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generate_sync_wb_single_write(slvi,slvo,clk,data, ADR_OFFSET => 4);
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wait until interrupt = '1';
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wait for CLK_PERIOD*20;
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-- Restart timer...
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data <= (others => '0');
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data(0) <= '1'; -- enable
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generate_sync_wb_single_write(slvi,slvo,clk,data, ADR_OFFSET => 4);
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wait for CLK_PERIOD*20;
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-- Change target value
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data <= std_logic_vector(to_unsigned(1024, data'length));
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generate_sync_wb_single_write(slvi,slvo,clk,data);
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-- Read status register
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data <= (others => '0');
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generate_sync_wb_single_read(slvi,slvo,clk,data, ADR_OFFSET => 4);
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wait until interrupt = '1';
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wait for CLK_PERIOD * 5;
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assert false report "Simulation terminated!" severity failure;
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wait;
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end process stimuli;
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END ARCHITECTURE;
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