From de55955410407a00cc51bfaf86c9bbe7ca1c9852 Mon Sep 17 00:00:00 2001
From: Hector van der Aa <hector@h3cx.dev>
Date: Sun, 22 Mar 2026 12:29:21 +0100
Subject: [PATCH] Flashing implemented

---
 src/neoecu/cli.py            |  2 +-
 src/neoecu/commands/flash.py | 78 +++++++++++++++++++++++++++++++++++-
 2 files changed, 77 insertions(+), 3 deletions(-)

diff --git a/src/neoecu/cli.py b/src/neoecu/cli.py
index abde4e6..f7c2e64 100644
--- a/src/neoecu/cli.py
+++ b/src/neoecu/cli.py
@@ -41,7 +41,7 @@ def main():
         run(project_root, args)
     elif args.command == "flash":
         from .commands.flash import run 
-        run()
+        run(project_root)
     elif args.command == "envcheck":
         from .commands.envcheck import run 
         run()
diff --git a/src/neoecu/commands/flash.py b/src/neoecu/commands/flash.py
index a0e47ae..8c57538 100644
--- a/src/neoecu/commands/flash.py
+++ b/src/neoecu/commands/flash.py
@@ -1,5 +1,79 @@
 # Copyright (C) 2026 Hector van der Aa <hector@h3cx.dev>
 # Copyright (C) 2026 Association Exergie <association.exergie@gmail.com>
 # SPDX-License-Identifier: GPL-3.0-or-later
-def run():
-    print("Flashing NeoECU...")
+
+from pathlib import Path
+import neoecu.common
+import subprocess
+
+def gen_flash_script(jlink_path: Path, core: str, bin_path: Path) -> Path:
+    jlink_path.mkdir(parents=True, exist_ok=True)
+    script_path = jlink_path / "flash.jlink"
+    script_path.unlink(missing_ok=True)
+    new_script: str = ""
+    if (core == "M7") or (core == "CM7"):
+        new_script += "device STM32H747XI_M7\n"
+    elif (core == "M4") or (core == "CM4"):
+        new_script += "device STM32H747XI_M4\n"
+    else:
+        raise RuntimeError(f"Unknown core: {core}")
+
+    new_script += "si SWD\n"
+    new_script += "speed auto\n"
+    new_script += "\n"
+    new_script += "connect\n"
+    new_script += "\n"
+    new_script += f'loadfile "{bin_path}"\n'
+    new_script += "\n"
+    new_script += "r\n"
+    new_script += "g\n"
+    new_script += "exit"
+
+    script_path.write_text(new_script);
+    return script_path
+
+
+
+
+def run(root_path: Path):
+
+    config = neoecu.common.load_config(root_path)
+
+    m7_root = root_path / config["build"]["m7_dir"]
+    m4_root = root_path / config["build"]["m4_dir"]
+
+    m7_jlink_scripts = m7_root / ".jlink_scripts"
+    m4_jlink_scripts = m4_root / ".jlink_scripts"
+
+    m7_build = m7_root / "CM7" / "build"
+
+    matches = list(m7_build.glob("*_CM7.elf"))
+
+    if not matches:
+        raise FileNotFoundError("No *_CM7.elf found in build directory")
+
+    if len(matches) > 1:
+        raise RuntimeError(f"Multiple CM7 ELF files found: {matches}")
+
+    m7_bin = matches[0]
+
+    m4_build = m4_root / "build" / "zephyr"
+
+    matches = list(m4_build.glob("zephyr.elf"))
+
+    if not matches:
+        raise FileNotFoundError("No *_CM4.elf found in build directory")
+
+    if len(matches) > 1:
+        raise RuntimeError(f"Multiple CM4 ELF files found: {matches}")
+
+    m4_bin = matches[0]
+
+    m7_flash_script = gen_flash_script(m7_jlink_scripts, "CM7", m7_bin)
+    m4_flash_script = gen_flash_script(m4_jlink_scripts, "CM4", m4_bin)
+    
+    subprocess.run(["JLinkExe", "-CommanderScript", f"{m4_flash_script}"], cwd=m4_root)
+    subprocess.run(["JLinkExe", "-CommanderScript", f"{m7_flash_script}"], cwd=m7_root)
+    
+    
+