Jason
c871281f1e
Guard all $display/$error/$time calls with ifdef SIMULATION in: - chirp_memory_loader_param.v (initial + always block debug prints) - cic_decimator_4x_enhanced.v (5 saturation/overflow displays + monitor block) - ddc_400m.v (FIR/baseband debug monitor block) - fft_1024_inverse.v (IFFT config debug block) - matched_filter_multi_segment.v (16 state machine displays + monitor) - nco_400m_enhanced.v (initial block debug print) - radar_receiver_final.v (frame/chirp counter displays) Replace SystemVerilog constructs with Verilog-2001: - usb_data_interface.v (typedef enum -> localparam + reg) - usb_packet_analyzer.v (typedef enum -> localparam, output reg -> wire)
145 lines
4.9 KiB
Verilog
145 lines
4.9 KiB
Verilog
`timescale 1ns / 1ps
|
|
|
|
/**
|
|
* usb_packet_analyzer.v
|
|
*
|
|
* Analyzes USB packet format from FT601 interface
|
|
* Verifies header/footer and data integrity
|
|
*/
|
|
|
|
module usb_packet_analyzer (
|
|
input wire clk,
|
|
input wire reset_n,
|
|
input wire [31:0] usb_data,
|
|
input wire usb_wr_strobe,
|
|
output reg packet_valid,
|
|
output reg [7:0] packet_type,
|
|
output reg [31:0] packet_data,
|
|
output wire [31:0] error_count
|
|
);
|
|
|
|
// Packet structure
|
|
localparam HEADER = 8'hAA;
|
|
localparam FOOTER = 8'h55;
|
|
localparam HEADER_POS = 24; // Header in bits [31:24]
|
|
|
|
// States (Verilog-2001 compatible)
|
|
localparam [2:0] ST_IDLE = 3'd0,
|
|
ST_HEADER = 3'd1,
|
|
ST_RANGE = 3'd2,
|
|
ST_DOPPLER = 3'd3,
|
|
ST_DETECTION = 3'd4,
|
|
ST_FOOTER = 3'd5;
|
|
|
|
reg [2:0] current_state, next_state;
|
|
reg [7:0] byte_count;
|
|
reg [31:0] error_reg;
|
|
reg [31:0] packet_count;
|
|
|
|
always @(posedge clk or negedge reset_n) begin
|
|
if (!reset_n) begin
|
|
current_state <= ST_IDLE;
|
|
byte_count <= 8'd0;
|
|
error_reg <= 32'd0;
|
|
packet_count <= 32'd0;
|
|
packet_valid <= 1'b0;
|
|
packet_type <= 8'd0;
|
|
packet_data <= 32'd0;
|
|
end else begin
|
|
packet_valid <= 1'b0;
|
|
|
|
case (current_state)
|
|
ST_IDLE: begin
|
|
if (usb_wr_strobe && usb_data[31:24] == HEADER) begin
|
|
current_state <= ST_HEADER;
|
|
packet_count <= packet_count + 1;
|
|
`ifdef SIMULATION
|
|
$display("[USB_ANALYZER] Packet %0d started at time %0t",
|
|
packet_count + 1, $time);
|
|
`endif
|
|
end
|
|
end
|
|
|
|
ST_HEADER: begin
|
|
if (usb_wr_strobe) begin
|
|
current_state <= ST_RANGE;
|
|
byte_count <= 8'd0;
|
|
end
|
|
end
|
|
|
|
ST_RANGE: begin
|
|
if (usb_wr_strobe) begin
|
|
if (byte_count == 8'd0) begin
|
|
packet_data[31:24] <= usb_data[7:0];
|
|
byte_count <= 8'd1;
|
|
end else if (byte_count == 8'd1) begin
|
|
packet_data[23:16] <= usb_data[7:0];
|
|
byte_count <= 8'd2;
|
|
end else if (byte_count == 8'd2) begin
|
|
packet_data[15:8] <= usb_data[7:0];
|
|
byte_count <= 8'd3;
|
|
end else if (byte_count == 8'd3) begin
|
|
packet_data[7:0] <= usb_data[7:0];
|
|
current_state <= ST_DOPPLER;
|
|
byte_count <= 8'd0;
|
|
`ifdef SIMULATION
|
|
$display("[USB_ANALYZER] Range data: 0x%08h", packet_data);
|
|
`endif
|
|
end
|
|
end
|
|
end
|
|
|
|
ST_DOPPLER: begin
|
|
if (usb_wr_strobe) begin
|
|
if (byte_count == 8'd0) begin
|
|
packet_data[31:16] <= usb_data[31:16]; // Doppler real
|
|
byte_count <= 8'd1;
|
|
end else if (byte_count == 8'd1) begin
|
|
packet_data[15:0] <= usb_data[31:16]; // Doppler imag
|
|
current_state <= ST_DETECTION;
|
|
byte_count <= 8'd0;
|
|
`ifdef SIMULATION
|
|
$display("[USB_ANALYZER] Doppler data: real=0x%04h, imag=0x%04h",
|
|
packet_data[31:16], packet_data[15:0]);
|
|
`endif
|
|
end
|
|
end
|
|
end
|
|
|
|
ST_DETECTION: begin
|
|
if (usb_wr_strobe) begin
|
|
packet_type <= usb_data[0];
|
|
current_state <= ST_FOOTER;
|
|
`ifdef SIMULATION
|
|
$display("[USB_ANALYZER] Detection: %b", usb_data[0]);
|
|
`endif
|
|
end
|
|
end
|
|
|
|
ST_FOOTER: begin
|
|
if (usb_wr_strobe) begin
|
|
if (usb_data[7:0] == FOOTER) begin
|
|
packet_valid <= 1'b1;
|
|
`ifdef SIMULATION
|
|
$display("[USB_ANALYZER] Packet %0d valid, footer OK", packet_count);
|
|
`endif
|
|
end else begin
|
|
error_reg <= error_reg + 1;
|
|
`ifdef SIMULATION
|
|
$error("[USB_ANALYZER] Invalid footer: expected 0x55, got 0x%02h",
|
|
usb_data[7:0]);
|
|
`endif
|
|
end
|
|
current_state <= ST_IDLE;
|
|
end
|
|
end
|
|
|
|
default: current_state <= ST_IDLE;
|
|
endcase
|
|
end
|
|
end
|
|
|
|
assign error_count = error_reg;
|
|
|
|
endmodule
|