From d1927f150a1049924fabc567ee755f9eae09b156 Mon Sep 17 00:00:00 2001
From: Jason <83615043+JJassonn69@users.noreply.github.com>
Date: Tue, 7 Apr 2026 06:46:30 +0300
Subject: [PATCH] fix(rtl): add DONT_TOUCH attribute to prevent opt_design from
 gutting 50T wrapper
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Build attempt 10 produced a valid bitstream but with only 315 LUTs and
15 DSPs — opt_design removed all logic feeding unconnected _nc wires.
Adding (* DONT_TOUCH = "TRUE" *) on the u_core instance prevents
Vivado from optimizing away the internal radar pipeline logic.
---
 9_Firmware/9_2_FPGA/radar_system_top_50t.v | 1 +
 1 file changed, 1 insertion(+)

diff --git a/9_Firmware/9_2_FPGA/radar_system_top_50t.v b/9_Firmware/9_2_FPGA/radar_system_top_50t.v
index f4525ae..ff2698e 100644
--- a/9_Firmware/9_2_FPGA/radar_system_top_50t.v
+++ b/9_Firmware/9_2_FPGA/radar_system_top_50t.v
@@ -95,6 +95,7 @@ module radar_system_top_50t (
     wire [5:0]  dbg_range_bin_nc;
     wire [3:0]  system_status_nc;
 
+    (* DONT_TOUCH = "TRUE" *)
     radar_system_top u_core (
         // ----- Clocks & Reset -----
         .clk_100m               (clk_100m),