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Trying to fix audio issues

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Imants Pulkstenis
2020-01-21 21:26:29 +02:00
parent e8095a4e68
commit c9e3a92ccb
6 changed files with 52 additions and 34 deletions
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clipping.v
+26 -17
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@@ -13,11 +13,12 @@ module clipping_effect #( parameter
);
//-------------Internal Constants---------------------------
localparam [2:0] IDLE = 'd0,
localparam [1:0] IDLE = 'd0,
CLIP = 'd1,
OUTPUT = 'd2;
OUTPUT = 'd2,
CLEAR = 'd3;
reg [2:0] r_state=IDLE, r_next=IDLE;
reg [1:0] r_state=IDLE, r_next=IDLE;
reg signed [data_width-1: 0] r_data = 'b0;
reg [data_width-1: 0] r_treshhold_p = 'b0;
@@ -32,12 +33,7 @@ assign o_data = r_data;
//---------state register sequential always block-----------
always @(posedge clk ) begin
if (reset == 1) begin
// clear state
r_state <= IDLE;
r_next <= IDLE;
end
else begin
if (~reset) begin
r_state <= r_next;
end
end
@@ -45,7 +41,12 @@ end
//----next state & outputs, combinational always block------
always @(posedge clk ) begin
if (reset) begin
r_next <= IDLE;
r_read_enable <= 0; // redy to read data
r_data_valid <= 0;
end
else begin
case(r_state)
IDLE : begin
if (i_data_ready == 1) begin
@@ -65,12 +66,12 @@ always @(posedge clk ) begin
CLIP : begin
case (r_data[data_width-1])
0 : begin // positive number
if (r_data > r_treshhold_p)
r_data <= r_treshhold_p;
if (r_data > r_treshhold_p) begin
r_data <= r_treshhold_p; end
end
1 : begin // negative number
if (r_data < r_treshhold_n)
r_data <= r_treshhold_n;
if (r_data < r_treshhold_n) begin
r_data <= r_treshhold_n; end
end
endcase
r_next <= OUTPUT;
@@ -79,9 +80,9 @@ always @(posedge clk ) begin
end
OUTPUT : begin
if (i_read_done == 1) begin
r_next <= IDLE;
r_next <= CLEAR;
r_data_valid <= 0;
r_read_enable <= 1;
r_read_enable <= 0;
end
else begin
r_next <= OUTPUT;
@@ -89,8 +90,16 @@ always @(posedge clk ) begin
r_read_enable <= 0; // read disable
end
end
default: r_next <= IDLE; // on error
CLEAR : begin
r_next <= IDLE;
r_data_valid <= 0;
r_read_enable <= 1;
end
default: begin
r_next <= IDLE; // on error
end
endcase
end
end