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Alex 2023-08-24 18:21:07 +02:00
commit 3e4b7d07ff
10 changed files with 332 additions and 353 deletions
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82
fpga/min_max_tracker.v
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@ -31,50 +31,50 @@ module min_max_tracker(
output [7:0] max
);
reg [7:0] min_val = 255;
reg [7:0] max_val = 0;
reg [7:0] cur_min_val = 255;
reg [7:0] cur_max_val = 0;
reg [1:0] state = 0;
reg [7:0] min_val = 255;
reg [7:0] max_val = 0;
reg [7:0] cur_min_val = 255;
reg [7:0] cur_max_val = 0;
reg [1:0] state = 0;
always @(posedge clk)
begin
case (state)
0: // initialize
begin
if (cur_max_val >= ({1'b0, adc_d} + threshold))
state <= 2;
else if (adc_d >= ({1'b0, cur_min_val} + threshold))
state <= 1;
if (cur_max_val <= adc_d)
cur_max_val <= adc_d;
else if (adc_d <= cur_min_val)
cur_min_val <= adc_d;
always @(posedge clk)
begin
case (state)
0: // initialize
begin
if (cur_max_val >= ({1'b0, adc_d} + threshold))
state <= 2;
else if (adc_d >= ({1'b0, cur_min_val} + threshold))
state <= 1;
if (cur_max_val <= adc_d)
cur_max_val <= adc_d;
else if (adc_d <= cur_min_val)
cur_min_val <= adc_d;
end
1: // high phase
begin
if (cur_max_val <= adc_d)
cur_max_val <= adc_d;
else if (({1'b0, adc_d} + threshold) <= cur_max_val) begin
state <= 2;
cur_min_val <= adc_d;
max_val <= cur_max_val;
end
1: // high phase
begin
if (cur_max_val <= adc_d)
cur_max_val <= adc_d;
else if (({1'b0, adc_d} + threshold) <= cur_max_val) begin
state <= 2;
cur_min_val <= adc_d;
max_val <= cur_max_val;
end
end
2: // low phase
begin
if (adc_d <= cur_min_val)
cur_min_val <= adc_d;
else if (adc_d >= ({1'b0, cur_min_val} + threshold)) begin
state <= 1;
cur_max_val <= adc_d;
min_val <= cur_min_val;
end
2: // low phase
begin
if (adc_d <= cur_min_val)
cur_min_val <= adc_d;
else if (adc_d >= ({1'b0, cur_min_val} + threshold)) begin
state <= 1;
cur_max_val <= adc_d;
min_val <= cur_min_val;
end
end
endcase
end
end
endcase
end
assign min = min_val;
assign max = max_val;
assign min = min_val;
assign max = max_val;
endmodule