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Using Zephyr 10.3.0 build on NXP FRDM-MCXN947 leaves board unresponsive after flash.

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
45/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
活跃
技术栈
c
领域
embedded-iot

调研方向

Start by comparing the LinkServer output and behavior when flashing the 10.3.0 and 10.3.0-alpha.4 ELF files to the FRDM-MCXN947 using the command in the issue. The issue does not identify a source file or test, so trace the boot and reset path for this board as needed. Done means the 10.3.0 build boots and exposes the CIRCUITPY drive or USB output.

由索引模型根据 Issue 内容生成。

描述

bug zephyr
CircuitPython version and board name
Adafruit CircuitPython 10.3.0-alpha.4 on 2026-07-23; FRDM-MCXN947 with mcxn947
Code/REPL
linkserver flash MCXN947:FRDM-MCXN947 load adafruit-circuitpython-nxp_frdm_mcxn947-en_US-10.3.0.elf
Behavior

Flashing the .elf file from 10.3.0-alpha.4 using linkserver works. Using the file from 10.3.0 fails.

Description

A diff of the linkserver outputs doesn't show any interesting differences until the end:

Nc: Starting execution using system reset with a stall address
Nc: Retask read watchpoint 1 at 0x50000040 to use for boot ROM stall
Nc: state - running or following reset request - re-read of state failed - rc Nn(05). Wire ACK Fault in DAP access
Nc: error closing down debug session - Nn(05). Wire ACK Fault in DAP access

After flashing 10.3.0 I don't see CIRCUITPY drive nor can I see any output on the USB port.
Here is the output from 10.3.0-alpha.4 after flashing:

Nc: Starting execution using system reset with a stall address
Nc: Retask read watchpoint 1 at 0x50000040 to use for boot ROM stall
Nc: Boot ROM stalled accessing address 0x50000040 (restoring watchpoint 1)
Ns: Stopped (Was Reset) [Reset from Unknown]: Watchpoint (Temp) #1 - read watchpoint at 0x50000040 Data watch for bootloader stall

Ns: restart on reset

Additional information
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C
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从这里开始

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  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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