mirror of
https://github.com/trcwm/Speech256.git
synced 2025-06-07 16:48:32 +02:00
Removed superfluous comments. Added 2x/double_mode for A1 coefficients to filter engine.
This commit is contained in:
Niels Moseley
parent
cf89706963
commit
bdcd8a3d8f
@ -1,7 +1,7 @@
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@ -566,31 +364,228 @@ h
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||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 224 -96" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 240 -96" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="0.714286 0 0 1 176 -68" stroke="black" pen="heavier" arrow="normal/normal">
|
||||||
|
56 712 m
|
||||||
|
168 712 l
|
||||||
|
</path>
|
||||||
|
<text matrix="1 0 0 1 168 -36" transformations="translations" pos="88 688" stroke="black" type="label" width="35.783" height="6.926" depth="1.93" halign="center" valign="center">shift reg</text>
|
||||||
|
<path stroke="black" arrow="normal/normal">
|
||||||
|
296 468 m
|
||||||
|
64 468 l
|
||||||
|
64 632 l
|
||||||
|
80 632 l
|
||||||
|
</path>
|
||||||
|
<path stroke="black" arrow="normal/normal">
|
||||||
|
304 632 m
|
||||||
|
320 632 l
|
||||||
|
320 608 l
|
||||||
|
296 608 l
|
||||||
|
296 584 l
|
||||||
|
312 584 l
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 160 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 176 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 192 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 208 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 224 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 240 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 256 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 272 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 160 12" stroke="black" pen="heavier" arrow="normal/normal">
|
||||||
|
56 712 m
|
||||||
|
168 712 l
|
||||||
|
</path>
|
||||||
|
<text matrix="1 0 0 1 184 44" transformations="translations" pos="88 688" stroke="black" type="label" width="35.783" height="6.926" depth="1.93" halign="center" valign="center">shift reg</text>
|
||||||
|
<path matrix="1 0 0 1 144 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 128 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 112 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path matrix="1 0 0 1 96 -16" stroke="black" pen="heavier">
|
||||||
|
48 736 m
|
||||||
|
48 720 l
|
||||||
|
64 720 l
|
||||||
|
64 736 l
|
||||||
|
h
|
||||||
|
</path>
|
||||||
|
<path stroke="black" arrow="normal/normal">
|
||||||
|
376 672 m
|
||||||
|
96 672 l
|
||||||
|
96 696 l
|
||||||
|
112 696 l
|
||||||
|
</path>
|
||||||
</page>
|
</page>
|
||||||
</ipe>
|
</ipe>
|
||||||
|
|||||||
@ -6,11 +6,6 @@
|
|||||||
// http://www.moseleyinstruments.com
|
// http://www.moseleyinstruments.com
|
||||||
//
|
//
|
||||||
|
|
||||||
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
||||||
// NO, NO, NO, NO, NO, NO, NO, NO, NO, NO, NO, NO, NO, NO, ..
|
|
||||||
// this is all arse-backwards as fuck ..
|
|
||||||
// we should use a shift register for states + coefficients!!
|
|
||||||
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
||||||
|
|
||||||
module FILTER (
|
module FILTER (
|
||||||
clk,
|
clk,
|
||||||
@ -52,6 +47,7 @@ module FILTER (
|
|||||||
reg state_sel;
|
reg state_sel;
|
||||||
reg accu_sel;
|
reg accu_sel;
|
||||||
reg do_accu;
|
reg do_accu;
|
||||||
|
reg double_mode;
|
||||||
reg update_states;
|
reg update_states;
|
||||||
reg update_coeffs;
|
reg update_coeffs;
|
||||||
reg [3:0] cur_state;
|
reg [3:0] cur_state;
|
||||||
@ -80,6 +76,7 @@ module FILTER (
|
|||||||
assign mul_coeff = coefmem[11];
|
assign mul_coeff = coefmem[11];
|
||||||
assign sig_out = accu;
|
assign sig_out = accu;
|
||||||
|
|
||||||
|
// clocked stuff..
|
||||||
always @(posedge clk, negedge rst_an)
|
always @(posedge clk, negedge rst_an)
|
||||||
begin
|
begin
|
||||||
if (rst_an == 0)
|
if (rst_an == 0)
|
||||||
@ -102,6 +99,7 @@ module FILTER (
|
|||||||
accu_sel <= 0;
|
accu_sel <= 0;
|
||||||
state_sel <= 0;
|
state_sel <= 0;
|
||||||
do_accu <= 0;
|
do_accu <= 0;
|
||||||
|
double_mode <= 0;
|
||||||
|
|
||||||
update_states <= 0;
|
update_states <= 0;
|
||||||
update_coeffs <= 0;
|
update_coeffs <= 0;
|
||||||
@ -149,7 +147,10 @@ module FILTER (
|
|||||||
// update the accumulator if necessary
|
// update the accumulator if necessary
|
||||||
if (do_accu)
|
if (do_accu)
|
||||||
begin
|
begin
|
||||||
accu <= accu_in + mul_result;
|
if (double_mode)
|
||||||
|
accu <= accu_in +{mul_result[14:0], 1'b0};
|
||||||
|
else
|
||||||
|
accu <= accu_in + mul_result;
|
||||||
end
|
end
|
||||||
|
|
||||||
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
||||||
@ -162,6 +163,7 @@ module FILTER (
|
|||||||
mul_start <= 0;
|
mul_start <= 0;
|
||||||
state_sel <= 0;
|
state_sel <= 0;
|
||||||
accu_sel <= 0;
|
accu_sel <= 0;
|
||||||
|
double_mode <= 0;
|
||||||
update_states <= 0;
|
update_states <= 0;
|
||||||
update_coeffs <= 0;
|
update_coeffs <= 0;
|
||||||
case(cur_state)
|
case(cur_state)
|
||||||
@ -181,11 +183,6 @@ module FILTER (
|
|||||||
// to reach a valid state
|
// to reach a valid state
|
||||||
begin
|
begin
|
||||||
cur_state <= 4'b0010;
|
cur_state <= 4'b0010;
|
||||||
//for(i=0; i<6; i=i+1)
|
|
||||||
//begin
|
|
||||||
// $display("s1[%d] = %x", i, state1[i]);
|
|
||||||
// $display("s2[%d] = %x", i, state2[i]);
|
|
||||||
//end
|
|
||||||
end
|
end
|
||||||
4'b0010: // wait for multiplier to complete
|
4'b0010: // wait for multiplier to complete
|
||||||
begin
|
begin
|
||||||
@ -194,6 +191,7 @@ module FILTER (
|
|||||||
cur_state <= 4'b0011;
|
cur_state <= 4'b0011;
|
||||||
accu_sel <= 0; // accu = sig_in + mul_result
|
accu_sel <= 0; // accu = sig_in + mul_result
|
||||||
do_accu <= 1;
|
do_accu <= 1;
|
||||||
|
double_mode <= 1; // a1 coefficient has double the weight
|
||||||
end
|
end
|
||||||
end
|
end
|
||||||
4'b0011: // update accu, 1st section only!
|
4'b0011: // update accu, 1st section only!
|
||||||
@ -252,6 +250,7 @@ module FILTER (
|
|||||||
cur_state <= 4'b1011;
|
cur_state <= 4'b1011;
|
||||||
accu_sel <= 1; // accu = accu + mul_result
|
accu_sel <= 1; // accu = accu + mul_result
|
||||||
do_accu <= 1;
|
do_accu <= 1;
|
||||||
|
double_mode <= 1; // a1 coefficient has double the weight
|
||||||
end
|
end
|
||||||
end
|
end
|
||||||
4'b1011: // update accu, 2nd..5th section only!
|
4'b1011: // update accu, 2nd..5th section only!
|
||||||
|
|||||||
@ -46,7 +46,7 @@ module FILTER_TB;
|
|||||||
#10
|
#10
|
||||||
coef_load = 1;
|
coef_load = 1;
|
||||||
// section 1
|
// section 1
|
||||||
coef_in = {1'b0, 9'd128}; // sign-magnitude a1 = -0.25
|
coef_in = {1'b0, 9'd64}; // sign-magnitude a1 = -0.25
|
||||||
#10
|
#10
|
||||||
coef_in = {1'b1, 9'd256}; // sign-magnitude a2 = 0.5
|
coef_in = {1'b1, 9'd256}; // sign-magnitude a2 = 0.5
|
||||||
#10
|
#10
|
||||||
|
|||||||
@ -31,4 +31,4 @@ The testbench should approximately give the following step response results:
|
|||||||
- 205
|
- 205
|
||||||
- 205
|
- 205
|
||||||
|
|
||||||
Note that there might be a few +/- 1 round-off errors.
|
Note that may be a few +/- 1 round-off errors.
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user