Nucleo-L476RG调试故障：未进入main()触发内存地址断点错误

Hey there, let's work through this debugging problem step by step based on your setup details. Here are the most common fixes to try:

• Check Linker Script & Startup File Match
  Make sure the startup file (e.g., startup_stm32l476xx.s) and linker script (e.g., STM32L476RG_FLASH.ld) generated by STM32CubeMX are correctly associated with your GNU ARM Eclipse project.

  • Right-click your project → Properties → C/C++ Build → Settings → Tool Settings → GNU ARM Cross Linker → General
  • Verify the linker script path points to the correct file for your Nucleo-L476RG. Mismatched or missing files here can cause the program to jump to invalid memory.

• Validate J-Link Debug Configuration
  Since you flashed the ST-Link with J-Link firmware, double-check your debug setup in Eclipse:

  • Go to Run → Debug Configurations → GDB SEGGER J-Link Debugging
  • Confirm the device is set to STM32L476RG, interface is SWD, and any initialization scripts (like stm32l4xx.cfg) are loaded correctly.
  • Try using the J-Link Commander tool to connect to your board first—if it can't detect the chip, you've got a hardware/driver connection issue to resolve first.

• Verify Reset Vector Table & Debug Symbols

  • Ensure your code correctly sets the vector table offset. In CubeMX-generated code, this is usually handled in SystemInit(), but you can double-check:

    SCB->VTOR = FLASH_BASE | 0x00; // Vector table starts at FLASH base address
    

  • Make sure debug symbols are enabled during compilation: Go to project properties → C/C++ Build → Settings → GNU ARM Cross Compiler → Debugging and set the flag to -g3 (or at least -g). Without debug symbols, Eclipse can't map memory addresses to your code, leading to that "no debug information" error.

• Check Flash Programming & Boot Settings

  • Sometimes the code doesn't get written to Flash properly. Try doing a full chip erase before re-flashing: In your flash configuration, tick the "Full Chip Erase" option.
  • Confirm the Nucleo board's BOOT dip switches are set to 00 (Flash boot mode). If they're set to SRAM or system memory, the board won't run your programmed code.

• Dig Into Debug Log Details
  The debug log you attached should have specific info about the unreadable memory address. If it's 0x08000000 (the Flash start), that points to a Flash programming or hardware issue. If it's a different address, it might indicate a vector table misconfiguration or linker error. Sharing that exact address would help narrow things down further.

If none of these steps resolve the issue, feel free to post the exact error lines from your debug log and any compilation warnings you're seeing—we can dive deeper from there.

内容的提问来源于stack exchange，提问作者Abhishek Behera