diff --git a/.opencode/serial_config.json b/.opencode/serial_config.json
index 92307f32..2574620f 100644
--- a/.opencode/serial_config.json
+++ b/.opencode/serial_config.json
@@ -1,6 +1,6 @@
 {
-  "portName": "COM6",
+  "portName": "COM7",
   "portHint": "USB 串行设备",
   "baudRate": 115200,
-  "note": "MCU 调试串口（USART1 → CH340 → 本机枚举为 COM6）。Python 串口助手（tools/serial_tool）与 @test 均以此文件为端口/波特率默认值（单一配置源）；执行前先读取。如本机端口变化，请人工修改此文件。"
+  "note": "MCU 调试串口（USART1 → CH340 → 本机枚举为 COM7）。Python 串口助手（tools/serial_tool）与 @test 均以此文件为端口/波特率默认值（单一配置源）；执行前先读取。如本机端口变化，请人工修改此文件。"
 }
diff --git a/MDK-ARM/STM32F407-Demo.uvprojx b/MDK-ARM/STM32F407-Demo.uvprojx
index 95f46934..ede6b401 100644
--- a/MDK-ARM/STM32F407-Demo.uvprojx
+++ b/MDK-ARM/STM32F407-Demo.uvprojx
@@ -16,7 +16,7 @@
         <TargetCommonOption>
           <Device>STM32F407ZGTx</Device>
           <Vendor>STMicroelectronics</Vendor>
-          <PackID>Keil.STM32F4xx_DFP.3.0.0</PackID>
+          <PackID>Keil.STM32F4xx_DFP.3.1.1</PackID>
           <PackURL>https://www.keil.com/pack/</PackURL>
           <Cpu>IRAM(0x20000000-0x2001BFFF) IRAM2(0x2001C000-0x2001FFFF) IROM(0x8000000-0x80FFFFF) CLOCK(25000000) FPU2 CPUTYPE("Cortex-M4") TZ</Cpu>
           <FlashUtilSpec></FlashUtilSpec>
@@ -186,7 +186,6 @@
             <RvdsVP>2</RvdsVP>
             <RvdsMve>0</RvdsMve>
             <RvdsCdeCp>0</RvdsCdeCp>
-            <nBranchProt>0</nBranchProt>
             <hadIRAM2>1</hadIRAM2>
             <hadIROM2>0</hadIROM2>
             <StupSel>8</StupSel>