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Widen ft601_be to [3:0] for 32-bit FT601 mode, fix NCO XSim TB

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- Expand ft601_be from [1:0] to [3:0] across RTL, top-level, testbenches,
  and XDC (uncomment be[2:3] pin assignments B21/A21)
- Fix NCO XSim testbench: correct reset check (0x7FFF not 0), add pipeline
  warmup and sample skip for DSP48E1 quadrature test
- All local regression tests pass (39/39 USB, 10/10 integration, all co-sim)
This commit is contained in:
Jason
2026-03-16 23:17:38 +02:00
parent af1af3bb91
commit 49eb6169b6
7 changed files with 35 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files
9_Firmware/9_2_FPGA/usb_data_interface.v
+7 -7
View File
@@ -14,7 +14,7 @@ module usb_data_interface (
// FT601 Interface (Slave FIFO mode)
// Data bus
inout wire [31:0] ft601_data, // 32-bit bidirectional data bus
output reg [1:0] ft601_be, // Byte enable (for 32-bit mode)
output reg [3:0] ft601_be, // Byte enable (4 lanes for 32-bit mode)
// Control signals
output reg ft601_txe_n, // Transmit enable (active low)
@@ -118,7 +118,7 @@ always @(posedge ft601_clk_in or negedge reset_n) begin
byte_counter <= 0;
ft601_data_out <= 0;
ft601_data_oe <= 0;
ft601_be <= 2'b11; // Both bytes enabled for 32-bit mode
ft601_be <= 4'b1111; // All bytes enabled for 32-bit mode
ft601_txe_n <= 1;
ft601_rxf_n <= 1;
ft601_wr_n <= 1;
@@ -142,7 +142,7 @@ always @(posedge ft601_clk_in or negedge reset_n) begin
if (!ft601_txe) begin // FT601 TX FIFO not empty
ft601_data_oe <= 1;
ft601_data_out <= {24'b0, HEADER};
ft601_be <= 2'b01; // Only lower byte valid
ft601_be <= 4'b0001; // Only lower byte valid
ft601_wr_n <= 0; // Assert write strobe
current_state <= SEND_RANGE_DATA;
end
@@ -151,7 +151,7 @@ always @(posedge ft601_clk_in or negedge reset_n) begin
SEND_RANGE_DATA: begin
if (!ft601_txe) begin
ft601_data_oe <= 1;
ft601_be <= 2'b11; // All bytes valid for 32-bit word
ft601_be <= 4'b1111; // All bytes valid for 32-bit word
case (byte_counter)
0: ft601_data_out <= range_profile_cap;
@@ -174,7 +174,7 @@ always @(posedge ft601_clk_in or negedge reset_n) begin
SEND_DOPPLER_DATA: begin
if (!ft601_txe && doppler_valid_ft) begin
ft601_data_oe <= 1;
ft601_be <= 2'b11;
ft601_be <= 4'b1111;
case (byte_counter)
0: ft601_data_out <= {doppler_real_cap, doppler_imag_cap};
@@ -197,7 +197,7 @@ always @(posedge ft601_clk_in or negedge reset_n) begin
SEND_DETECTION_DATA: begin
if (!ft601_txe && cfar_valid_ft) begin
ft601_data_oe <= 1;
ft601_be <= 2'b01;
ft601_be <= 4'b0001;
ft601_data_out <= {24'b0, 7'b0, cfar_detection_cap};
ft601_wr_n <= 0;
current_state <= SEND_FOOTER;
@@ -207,7 +207,7 @@ always @(posedge ft601_clk_in or negedge reset_n) begin
SEND_FOOTER: begin
if (!ft601_txe) begin
ft601_data_oe <= 1;
ft601_be <= 2'b01;
ft601_be <= 4'b0001;
ft601_data_out <= {24'b0, FOOTER};
ft601_wr_n <= 0;
current_state <= WAIT_ACK;