I find the file power_trigger.v line 57 ,the abs_i is the complement code of input_i,Why were you called the signal name is abs_i? the abs_i means absolute value.
always @(posedge clock) begin
if (reset) begin
sample_count <= 0;
trigger <= 0;
abs_i <= 0;
state <= S_SKIP;
end else if (enable & sample_in_strobe) begin
abs_i <= input_i[15]? ~input_i+1: input_i;
case(state)
S_SKIP: begin
if(sample_count > num_sample_to_skip) begin
state <= S_IDLE;
end else begin
sample_count <= sample_count + 1;
end
end
S_IDLE: begin
if (num_sample_changed) begin
sample_count <= 0;
state <= S_SKIP;
end else if (abs_i > power_thres) begin
// trigger on any significant signal
trigger <= 1;
sample_count <= 0;
state <= S_PACKET;
end
end
S_PACKET: begin
if (num_sample_changed) begin
sample_count <= 0;
state <= S_SKIP;
end else if (abs_i < power_thres) begin
// go back to idle for N consecutive low signals
if (sample_count > window_size) begin
trigger <= 0;
state <= S_IDLE;
end else begin
sample_count <= sample_count + 1;
end
end else begin
sample_count <= 0;
end
end
endcase
end
end
endmodule
I find the file power_trigger.v line 57 ,the abs_i is the complement code of input_i,Why were you called the signal name is abs_i? the abs_i means absolute value.