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feat(usb): add FT2232H USB 2.0 interface for 50T production board

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Replace FT601 (USB 3.0, 32-bit) with FT2232H (USB 2.0, 8-bit) on the
50T production board per updated Eagle schematic (commit 0db0e7b).
USB 3.0 via FT601 remains available on the 200T premium board.

RTL changes:
- Add usb_data_interface_ft2232h.v: 245 Sync FIFO interface with toggle
  CDC (3-stage) for reliable 100MHz->60MHz clock domain crossing,
  mux-based byte serialization for 11-byte data packets, 26-byte status
  packets, and 4-byte sequential command read FSM
- Add USB_MODE parameter to radar_system_top.v with generate block:
  USB_MODE=0 selects FT601 (200T), USB_MODE=1 selects FT2232H (50T)
- Wire FT2232H ports in radar_system_top_50t.v with USB_MODE=1 override,
  connect ft_clkout to shared clock input port
- Add post-DSP retiming register in ddc_400m.v to fix marginal 400MHz
  timing path (WNS improved from +0.070ns to +0.088ns)

Constraints:
- Add FT2232H pin assignments for all 15 signals on Bank 35 (LVCMOS33)
- Add 60MHz ft_clkout clock constraint (16.667ns) on MRCC N-type pin C4
- Add CLOCK_DEDICATED_ROUTE FALSE for N-type MRCC workaround
- Add CDC false paths between ft_clkout and clk_100m/clk_120m_dac

Build scripts:
- Add PLIO-9 DRC demotion and CLOCK_DEDICATED_ROUTE property in build_50t.tcl
- Add usb_data_interface_ft2232h.v to build_200t.tcl explicit file list

Python host:
- Add FT2232HConnection class using pyftdi SyncFIFO (VID 0x0403:0x6010)
- Add compact 11-byte packet parser for FT2232H data packets
- Update RadarAcquisition to support both FT601 and FT2232H connections

Test results:
- iverilog regression: 23/23 PASS
- Vivado Build 15 (XC7A50T): WNS=+0.088ns, WHS=+0.059ns, 0 violations
- DSP48E1: 112/120 (93.3%), LUTs: 10,060/32,600 (30.9%)
This commit is contained in:
Jason
2026-04-07 19:22:16 +03:00
parent 3e737fb90e
commit 408f4d126f
9 changed files with 1119 additions and 136 deletions
Download Patch File Download Diff File Expand all files Collapse all files
9_Firmware/9_2_FPGA/radar_system_top.v
+150 -59
View File
@@ -7,12 +7,16 @@
* Integrates:
* - Radar Transmitter (PLFM chirp generation)
* - Radar Receiver (ADC interface, DDC, matched filtering, Doppler processing)
* - USB Data Interface (FT601 for high-speed data transfer)
* - USB Data Interface (FT601 USB 3.0 or FT2232H USB 2.0, selected by USB_MODE)
*
* Clock domains:
* - clk_100m: System clock (100MHz)
* - clk_120m_dac: DAC clock (120MHz)
* - ft601_clk: FT601 interface clock (100MHz from FT601)
* - ft601_clk: USB interface clock (100MHz FT601 or 60MHz FT2232H)
*
* USB_MODE parameter:
* 0 = FT601 (32-bit, USB 3.0) — 200T premium board
* 1 = FT2232H (8-bit, USB 2.0) — 50T production board
*/
module radar_system_top (
@@ -93,9 +97,19 @@ module radar_system_top (
input wire [1:0] ft601_srb, // Selected read buffer
input wire [1:0] ft601_swb, // Selected write buffer
// Clock output (optional)
// Clock output (optional, FT601 only — not used for FT2232H)
output wire ft601_clk_out,
// ========== FT2232H USB 2.0 INTERFACE (USB_MODE=1) ==========
// 8-bit bidirectional data bus (245 Synchronous FIFO mode, Channel A)
inout wire [7:0] ft_data, // 8-bit bidirectional data bus
input wire ft_rxf_n, // RX FIFO not empty (active low)
input wire ft_txe_n, // TX FIFO not full (active low)
output wire ft_rd_n, // Read strobe (active low)
output wire ft_wr_n, // Write strobe (active low)
output wire ft_oe_n, // Output enable / bus direction
output wire ft_siwu, // Send Immediate / WakeUp
// ========== STATUS OUTPUTS ==========
// Beam position tracking
@@ -122,6 +136,7 @@ module radar_system_top (
parameter USE_LONG_CHIRP = 1'b1; // Default to long chirp
parameter DOPPLER_ENABLE = 1'b1; // Enable Doppler processing
parameter USB_ENABLE = 1'b1; // Enable USB data transfer
parameter USB_MODE = 0; // 0=FT601 (32-bit, 200T), 1=FT2232H (8-bit, 50T)
// ============================================================================
// INTERNAL SIGNALS
@@ -667,67 +682,143 @@ assign usb_detect_flag = rx_detect_flag;
assign usb_detect_valid = rx_detect_valid;
// ============================================================================
// USB DATA INTERFACE INSTANTIATION
// USB DATA INTERFACE INSTANTIATION (parametric: FT601 or FT2232H)
// ============================================================================
usb_data_interface usb_inst (
.clk(clk_100m_buf),
.reset_n(sys_reset_n),
.ft601_reset_n(sys_reset_ft601_n), // FT601-domain synchronized reset
// Radar data inputs
.range_profile(usb_range_profile),
.range_valid(usb_range_valid),
.doppler_real(usb_doppler_real),
.doppler_imag(usb_doppler_imag),
.doppler_valid(usb_doppler_valid),
.cfar_detection(usb_detect_flag),
.cfar_valid(usb_detect_valid),
// FT601 Interface
.ft601_data(ft601_data),
.ft601_be(ft601_be),
.ft601_txe_n(ft601_txe_n),
.ft601_rxf_n(ft601_rxf_n),
.ft601_txe(ft601_txe),
.ft601_rxf(ft601_rxf),
.ft601_wr_n(ft601_wr_n),
.ft601_rd_n(ft601_rd_n),
.ft601_oe_n(ft601_oe_n),
.ft601_siwu_n(ft601_siwu_n),
.ft601_srb(ft601_srb),
.ft601_swb(ft601_swb),
.ft601_clk_out(ft601_clk_out),
.ft601_clk_in(ft601_clk_buf),
// Host command outputs (Gap 4: USB Read Path)
.cmd_data(usb_cmd_data),
.cmd_valid(usb_cmd_valid),
.cmd_opcode(usb_cmd_opcode),
.cmd_addr(usb_cmd_addr),
.cmd_value(usb_cmd_value),
generate
if (USB_MODE == 0) begin : gen_ft601
// ---- FT601 USB 3.0 (32-bit, 200T premium board) ----
usb_data_interface usb_inst (
.clk(clk_100m_buf),
.reset_n(sys_reset_n),
.ft601_reset_n(sys_reset_ft601_n),
// Radar data inputs
.range_profile(usb_range_profile),
.range_valid(usb_range_valid),
.doppler_real(usb_doppler_real),
.doppler_imag(usb_doppler_imag),
.doppler_valid(usb_doppler_valid),
.cfar_detection(usb_detect_flag),
.cfar_valid(usb_detect_valid),
// FT601 Interface
.ft601_data(ft601_data),
.ft601_be(ft601_be),
.ft601_txe_n(ft601_txe_n),
.ft601_rxf_n(ft601_rxf_n),
.ft601_txe(ft601_txe),
.ft601_rxf(ft601_rxf),
.ft601_wr_n(ft601_wr_n),
.ft601_rd_n(ft601_rd_n),
.ft601_oe_n(ft601_oe_n),
.ft601_siwu_n(ft601_siwu_n),
.ft601_srb(ft601_srb),
.ft601_swb(ft601_swb),
.ft601_clk_out(ft601_clk_out),
.ft601_clk_in(ft601_clk_buf),
// Host command outputs
.cmd_data(usb_cmd_data),
.cmd_valid(usb_cmd_valid),
.cmd_opcode(usb_cmd_opcode),
.cmd_addr(usb_cmd_addr),
.cmd_value(usb_cmd_value),
// Gap 2: Stream control (clk_100m domain, CDC'd inside usb_data_interface)
.stream_control(host_stream_control),
// Stream control
.stream_control(host_stream_control),
// Gap 2: Status readback inputs
.status_request(host_status_request),
.status_cfar_threshold(host_detect_threshold),
.status_stream_ctrl(host_stream_control),
.status_radar_mode(host_radar_mode),
.status_long_chirp(host_long_chirp_cycles),
.status_long_listen(host_long_listen_cycles),
.status_guard(host_guard_cycles),
.status_short_chirp(host_short_chirp_cycles),
.status_short_listen(host_short_listen_cycles),
.status_chirps_per_elev(host_chirps_per_elev),
.status_range_mode(host_range_mode),
// Status readback inputs
.status_request(host_status_request),
.status_cfar_threshold(host_detect_threshold),
.status_stream_ctrl(host_stream_control),
.status_radar_mode(host_radar_mode),
.status_long_chirp(host_long_chirp_cycles),
.status_long_listen(host_long_listen_cycles),
.status_guard(host_guard_cycles),
.status_short_chirp(host_short_chirp_cycles),
.status_short_listen(host_short_listen_cycles),
.status_chirps_per_elev(host_chirps_per_elev),
.status_range_mode(host_range_mode),
// Self-test status readback
.status_self_test_flags(self_test_flags_latched),
.status_self_test_detail(self_test_detail_latched),
.status_self_test_busy(self_test_busy)
);
// Self-test status readback
.status_self_test_flags(self_test_flags_latched),
.status_self_test_detail(self_test_detail_latched),
.status_self_test_busy(self_test_busy)
);
// FT2232H ports unused in FT601 mode — tie off
assign ft_rd_n = 1'b1;
assign ft_wr_n = 1'b1;
assign ft_oe_n = 1'b1;
assign ft_siwu = 1'b0;
end else begin : gen_ft2232h
// ---- FT2232H USB 2.0 (8-bit, 50T production board) ----
usb_data_interface_ft2232h usb_inst (
.clk(clk_100m_buf),
.reset_n(sys_reset_n),
.ft_reset_n(sys_reset_ft601_n), // Reuse same synchronized reset
// Radar data inputs
.range_profile(usb_range_profile),
.range_valid(usb_range_valid),
.doppler_real(usb_doppler_real),
.doppler_imag(usb_doppler_imag),
.doppler_valid(usb_doppler_valid),
.cfar_detection(usb_detect_flag),
.cfar_valid(usb_detect_valid),
// FT2232H Interface
.ft_data(ft_data),
.ft_rxf_n(ft_rxf_n),
.ft_txe_n(ft_txe_n),
.ft_rd_n(ft_rd_n),
.ft_wr_n(ft_wr_n),
.ft_oe_n(ft_oe_n),
.ft_siwu(ft_siwu),
.ft_clk(ft601_clk_buf), // Reuse BUFG'd USB clock
// Host command outputs
.cmd_data(usb_cmd_data),
.cmd_valid(usb_cmd_valid),
.cmd_opcode(usb_cmd_opcode),
.cmd_addr(usb_cmd_addr),
.cmd_value(usb_cmd_value),
// Stream control
.stream_control(host_stream_control),
// Status readback inputs
.status_request(host_status_request),
.status_cfar_threshold(host_detect_threshold),
.status_stream_ctrl(host_stream_control),
.status_radar_mode(host_radar_mode),
.status_long_chirp(host_long_chirp_cycles),
.status_long_listen(host_long_listen_cycles),
.status_guard(host_guard_cycles),
.status_short_chirp(host_short_chirp_cycles),
.status_short_listen(host_short_listen_cycles),
.status_chirps_per_elev(host_chirps_per_elev),
.status_range_mode(host_range_mode),
// Self-test status readback
.status_self_test_flags(self_test_flags_latched),
.status_self_test_detail(self_test_detail_latched),
.status_self_test_busy(self_test_busy)
);
// FT601 ports unused in FT2232H mode — tie off
assign ft601_be = 4'b0000;
assign ft601_txe_n = 1'b1;
assign ft601_rxf_n = 1'b1;
assign ft601_wr_n = 1'b1;
assign ft601_rd_n = 1'b1;
assign ft601_oe_n = 1'b1;
assign ft601_siwu_n = 1'b1;
assign ft601_clk_out = 1'b0;
end
endgenerate
// ============================================================================
// USB COMMAND CDC: ft601_clk → clk_100m (Gap 4: USB Read Path)