From 1d5fe8073d23fcbf7e1275a91330b50b26e74060 Mon Sep 17 00:00:00 2001
From: yuquanjun <yuquanjun@keens312.com>
Date: Sun, 30 Aug 2026 20:11:17 +0800
Subject: [PATCH] Auto-select Cortex-M4 on flash/capture so J-Link never
 prompts for device.

Co-authored-by: Cursor <cursoragent@cursor.com>
---
 scripts/flash-app.ps1       | 64 +++++++++++++++++++++++++++++++++++++
 tools/JLinkSettings.ini     |  8 +++++
 tools/jlink_hidedevid.jlink |  2 ++
 tools/rtt_lcd_capture.py    | 11 ++++++-
 4 files changed, 84 insertions(+), 1 deletion(-)
 create mode 100644 scripts/flash-app.ps1
 create mode 100644 tools/JLinkSettings.ini
 create mode 100644 tools/jlink_hidedevid.jlink

diff --git a/scripts/flash-app.ps1 b/scripts/flash-app.ps1
new file mode 100644
index 0000000..64be173
--- /dev/null
+++ b/scripts/flash-app.ps1
@@ -0,0 +1,64 @@
+#Requires -Version 5.1
+<#
+.SYNOPSIS
+  Build (optional) and flash YNGJ-GT1-M app via IAR cspybat + J-Link.
+  Auto-selects Cortex-M4 and suppresses J-Link device-selection dialogs.
+#>
+param(
+    [switch]$NoBuild
+)
+
+$ErrorActionPreference = "Stop"
+$Root = Split-Path -Parent $PSScriptRoot
+$Ewp = Join-Path $Root "project\IAR_V7.4\YNGJ-GT1-M.ewp"
+$ExeDir = Join-Path $Root "project\IAR_V7.4\YNGJ-GT1-M\Exe"
+$Out = Join-Path $ExeDir "YNGJ-GT1-M.out"
+$Bin = Join-Path $ExeDir "YNGJ-GT1-M.bin"
+$ToolsDir = Join-Path $Root "tools"
+$SettingsSrc = Join-Path $ToolsDir "JLinkSettings.ini"
+$JlinkScript = Join-Path $ToolsDir "jlink_hidedevid.jlink"
+$GeneralXcl = Join-Path $Root "project\IAR_V7.4\settings\YNGJ-GT1-M.YNGJ-GT1-M.general.xcl"
+$DriverXcl = Join-Path $Root "project\IAR_V7.4\settings\YNGJ-GT1-M.YNGJ-GT1-M.driver.xcl"
+$IarBuild = "C:\Program Files (x86)\IAR Systems\Embedded Workbench 7.3\common\bin\IarBuild.exe"
+$CspyBat = "C:\Program Files (x86)\IAR Systems\Embedded Workbench 7.3\common\bin\cspybat.exe"
+$TempFlash = "C:\Temp\k1flash"
+
+# Suppress J-Link unknown-device popup (cwd / AppData / ASCII path for script).
+New-Item -ItemType Directory -Force -Path $ExeDir, $TempFlash | Out-Null
+Copy-Item -Force $SettingsSrc (Join-Path $ExeDir "JLinkSettings.ini")
+Copy-Item -Force $SettingsSrc (Join-Path $TempFlash "JLinkSettings.ini")
+Copy-Item -Force $JlinkScript (Join-Path $TempFlash "jlink_hidedevid.jlink")
+$Roaming = Join-Path $env:APPDATA "SEGGER"
+New-Item -ItemType Directory -Force -Path $Roaming | Out-Null
+Copy-Item -Force $SettingsSrc (Join-Path $Roaming "JLinkSettings.ini")
+
+# Stop leftover debug servers that hold the probe.
+Get-Process -Name CSpyBat, JLinkGUIServer, JLink -ErrorAction SilentlyContinue |
+    Where-Object { $_.ProcessName -match 'CSpyBat|JLinkGUIServer' } |
+    Stop-Process -Force -ErrorAction SilentlyContinue
+
+if (-not $NoBuild) {
+    Write-Host "Building..."
+    & $IarBuild $Ewp -make YNGJ-GT1-M
+    if ($LASTEXITCODE -ne 0) { throw "IarBuild failed: $LASTEXITCODE" }
+}
+
+if (-not (Test-Path $Out)) { throw "Missing $Out" }
+
+if (Test-Path $Bin) {
+    Copy-Item -Force $Bin (Join-Path $TempFlash "YNGJ-GT1-M.bin")
+}
+
+Write-Host "Flashing (Cortex-M4, no device dialog)..."
+Push-Location $ExeDir
+try {
+    # HideDeviceSelection comes from JLinkSettings.ini + driver.xcl jlink script.
+    & $CspyBat -f $GeneralXcl --download_only --silent --backend -f $DriverXcl
+    $code = $LASTEXITCODE
+} finally {
+    Pop-Location
+}
+
+if ($code -ne 0) { throw "Flash failed: $code" }
+Write-Host "Flash OK"
+exit 0
diff --git a/tools/JLinkSettings.ini b/tools/JLinkSettings.ini
new file mode 100644
index 0000000..a03c98d
--- /dev/null
+++ b/tools/JLinkSettings.ini
@@ -0,0 +1,8 @@
+[GENERAL]
+HideDeviceSelection = 1
+
+[CPU]
+Device="Cortex-M4"
+
+[FLASH]
+Device="Cortex-M4"
diff --git a/tools/jlink_hidedevid.jlink b/tools/jlink_hidedevid.jlink
new file mode 100644
index 0000000..66bbce9
--- /dev/null
+++ b/tools/jlink_hidedevid.jlink
@@ -0,0 +1,2 @@
+HideDeviceSelection 1
+Device Cortex-M4
diff --git a/tools/rtt_lcd_capture.py b/tools/rtt_lcd_capture.py
index 5e3b927..db4d339 100644
--- a/tools/rtt_lcd_capture.py
+++ b/tools/rtt_lcd_capture.py
@@ -12,7 +12,7 @@ import time
 MAGIC = b"SCRN"
 HEADER_FMT = "<4sHHHH"
 HEADER_SIZE = struct.calcsize(HEADER_FMT)
-DEFAULT_DEVICES = ("AT32F403AC", "AT32F403A", "Cortex-M4")
+DEFAULT_DEVICES = ("Cortex-M4", "AT32F403AC", "AT32F403A")
 
 
 def rgb565_bytes_to_rgb(hi: int, lo: int) -> tuple[int, int, int]:
@@ -39,11 +39,20 @@ def connect_jlink(device: str):
 
     jlink = pylink.JLink()
     jlink.open()
+    try:
+        # Avoid interactive "select device" popup for unknown AT32 ID.
+        jlink.exec_command("HideDeviceSelection = 1")
+    except Exception:
+        pass
     jlink.set_tif(pylink.enums.JLinkInterfaces.SWD)
 
     last_error = None
     for candidate in (device, *DEFAULT_DEVICES):
         try:
+            try:
+                jlink.exec_command(f"Device = {candidate}")
+            except Exception:
+                pass
             jlink.connect(candidate)
             print(f"Connected as {candidate}")
             return jlink