Revision 172
Added by markw about 11 years ago
| common/a8core/pokey.vhdl | ||
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PORT
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(
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CLK : IN STD_LOGIC;
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RESET_N : IN STD_LOGIC;
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NOISE_SELECT : IN STD_LOGIC_VECTOR(2 downto 0);
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| ... | ... | |
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-- Instantiate audio noise filters
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pokey_noise_filter0 : pokey_noise_filter
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port map(clk=>clk,noise_select=>audc0_reg(7 downto 5),pulse_in=>audf0_pulse,pulse_out=>audf0_pulse_noise,noise_4=>noise_4,noise_5=>noise_5,noise_large=>noise_large);
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port map(clk=>clk,reset_n=>reset_n,noise_select=>audc0_reg(7 downto 5),pulse_in=>audf0_pulse,pulse_out=>audf0_pulse_noise,noise_4=>noise_4,noise_5=>noise_5,noise_large=>noise_large);
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pokey_noise_filter1 : pokey_noise_filter
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port map(clk=>clk,noise_select=>audc1_reg(7 downto 5),pulse_in=>audf1_pulse,pulse_out=>audf1_pulse_noise,noise_4=>noise_4_reg(0),noise_5=>noise_5_reg(0),noise_large=>noise_large_reg(0));
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port map(clk=>clk,reset_n=>reset_n,noise_select=>audc1_reg(7 downto 5),pulse_in=>audf1_pulse,pulse_out=>audf1_pulse_noise,noise_4=>noise_4_reg(0),noise_5=>noise_5_reg(0),noise_large=>noise_large_reg(0));
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pokey_noise_filter2 : pokey_noise_filter
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port map(clk=>clk,noise_select=>audc2_reg(7 downto 5),pulse_in=>audf2_pulse,pulse_out=>audf2_pulse_noise,noise_4=>noise_4_reg(1),noise_5=>noise_5_reg(1),noise_large=>noise_large_reg(1));
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port map(clk=>clk,reset_n=>reset_n,noise_select=>audc2_reg(7 downto 5),pulse_in=>audf2_pulse,pulse_out=>audf2_pulse_noise,noise_4=>noise_4_reg(1),noise_5=>noise_5_reg(1),noise_large=>noise_large_reg(1));
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pokey_noise_filter3 : pokey_noise_filter
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port map(clk=>clk,noise_select=>audc3_reg(7 downto 5),pulse_in=>audf3_pulse,pulse_out=>audf3_pulse_noise,noise_4=>noise_4_reg(2),noise_5=>noise_5_reg(2),noise_large=>noise_large_reg(2));
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port map(clk=>clk,reset_n=>reset_n,noise_select=>audc3_reg(7 downto 5),pulse_in=>audf3_pulse,pulse_out=>audf3_pulse_noise,noise_4=>noise_4_reg(2),noise_5=>noise_5_reg(2),noise_large=>noise_large_reg(2));
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-- Audio output stage
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-- (toggling now handled in the noise filter - the subtlety on when to toggle and when to sample is important)
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| common/a8core/pokey_noise_filter.vhdl | ||
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PORT
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(
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CLK : IN STD_LOGIC;
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RESET_N : IN STD_LOGIC;
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NOISE_SELECT : IN STD_LOGIC_VECTOR(2 downto 0);
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| ... | ... | |
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signal out_next : std_logic;
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signal out_reg : std_logic;
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BEGIN
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process(clk)
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process(clk,reset_n)
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begin
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if (clk'event and clk='1') then
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if (reset_n='0') then
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out_reg <= '0';
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elsif (clk'event and clk='1') then
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out_reg <= out_next;
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end if;
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end process;
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Added reset to noise filter (helps for sim), fixed inversion on poly5.