Revision 1525
Added by markw about 14 hours ago
| top.vhdl | ||
|---|---|---|
|
signal tapmatches : std_logic_vector(2 downto 0);
|
||
|
|
||
|
-- amplitude modulator
|
||
|
signal channel_a_modulated : signed(15 downto 0);
|
||
|
signal channel_b_modulated : signed(15 downto 0);
|
||
|
signal channel_c_modulated : signed(15 downto 0);
|
||
|
signal channel_mux_modulated : signed(15 downto 0);
|
||
|
signal channel_mux_sel : std_logic_vector(2 downto 0);
|
||
|
signal channel_d : signed(15 downto 0);
|
||
|
|
||
|
-- prefilter
|
||
| ... | ... | |
|
);
|
||
|
|
||
|
-- volume
|
||
|
vol_a : entity work.SID_amplitudeModulator
|
||
|
vol_abc : entity work.SID_amplitudeModulator
|
||
|
PORT MAP
|
||
|
(
|
||
|
CLK => clk,
|
||
|
RESET_N => reset_n,
|
||
|
ENABLE => enable,
|
||
|
|
||
|
WAVE => wave_a_reg,
|
||
|
ENVELOPE => envelope_a_reg,
|
||
|
|
||
|
MODULATED => channel_a_modulated
|
||
|
);
|
||
|
WAVE_A => wave_a_reg,
|
||
|
ENVELOPE_A => envelope_a_reg,
|
||
|
WAVE_B => wave_b_reg,
|
||
|
ENVELOPE_B => envelope_b_reg,
|
||
|
WAVE_C => wave_c_reg,
|
||
|
ENVELOPE_C => envelope_c_reg,
|
||
|
CHANNEL_D => channel_d,
|
||
|
|
||
|
vol_b : entity work.SID_amplitudeModulator
|
||
|
PORT MAP
|
||
|
(
|
||
|
CLK => clk,
|
||
|
RESET_N => reset_n,
|
||
|
ENABLE => enable,
|
||
|
CHANNEL_MUX_SEL => channel_mux_sel,
|
||
|
|
||
|
WAVE => wave_b_reg,
|
||
|
ENVELOPE => envelope_b_reg,
|
||
|
|
||
|
MODULATED => channel_b_modulated
|
||
|
MODULATED => channel_mux_modulated
|
||
|
);
|
||
|
|
||
|
vol_c : entity work.SID_amplitudeModulator
|
||
|
PORT MAP
|
||
|
(
|
||
|
CLK => clk,
|
||
|
RESET_N => reset_n,
|
||
|
ENABLE => enable,
|
||
|
|
||
|
WAVE => wave_c_reg,
|
||
|
ENVELOPE => envelope_c_reg,
|
||
|
|
||
|
MODULATED => channel_c_modulated
|
||
|
);
|
||
|
|
||
|
prefilter: entity work.SID_preFilterSum
|
||
|
PORT MAP
|
||
|
(
|
||
| ... | ... | |
|
|
||
|
BIAS_CHANNEL => sidtype,
|
||
|
|
||
|
CHANNEL_A => channel_a_modulated,
|
||
|
CHANNEL_B => channel_b_modulated,
|
||
|
CHANNEL_C => channel_c_modulated,
|
||
|
CHANNEL_MUX => channel_mux_modulated,
|
||
|
CHANNEL_C_CUTDIRECT => ch3silent_reg,
|
||
|
CHANNEL_D => channel_d,
|
||
|
FILTER_EN => filter_en_reg,
|
||
|
|
||
|
CHANNEL_MUX_SEL => channel_mux_sel,
|
||
|
PREFILTER_OUT => channel_prefilter,
|
||
|
DIRECT_OUT => channel_directsum
|
||
|
);
|
||
| ... | ... | |
|
|
||
|
DEBUG_EV1 <= unsigned(envelope_a_reg);
|
||
|
DEBUG_WV1 <= unsigned(wave_a_reg);
|
||
|
DEBUG_AM1 <= channel_a_modulated;
|
||
|
DEBUG_AM1 <= channel_mux_modulated;
|
||
|
|
||
|
FILTER_BP_OUT <= filter_bp(17 downto 8);
|
||
|
FILTER_HP_OUT <= filter_hp(17 downto 8);
|
||
Share the multiplier in the amplitude modulator