cleaned flake

flake.nix

@@ -34,9 +34,6 @@
       ];
 
       shellHook = ''
-        echo ">>> STM32U575ZI-Q Rust (HAL + PAC) DevShell"
-        echo "---------------------------------------------"
-
         # Set up Rust target
         rustup target add thumbv7em-none-eabihf 2>/dev/null || true
 
@@ -49,17 +46,10 @@
         export CARGO_TARGET_DIR=target
         export PATH=$PATH:${pkgs.gcc-arm-embedded}/bin
 
-        echo "🧩 Target: $RUST_TARGET"
-        echo "💡 Examples:"
-        echo "  1️⃣  cargo generate --git https://github.com/rust-embedded/cortex-m-quickstart --name stm32u5-blinky"
-        echo "  2️⃣  cd stm32u5-blinky && cargo build --release --target thumbv7em-none-eabihf"
-        echo "  3️⃣  probe-rs run --chip STM32U575ZITxQ target/thumbv7em-none-eabihf/release/stm32u5-blinky"
-        echo ""
-        echo "🧠 TIP: Add stm32u5xx-hal to Cargo.toml to access register-level HAL API."
-        echo "---------------------------------------------"
-
 	rustc --version
 	arm-none-eabi-gcc --version | head -n1
+        echo "cargo build --release --target thumbv8m.main-none-eabihf"
+        echo "sudo probe-rs run --chip STM32U575ZI target/thumbv8m.main-none-eabihf/release/main"
       '';
     };
   };