embedded data_error ai_generated true

Bootloader: CRC check failed for application image at 0x08020000, expected 0xABCD1234, got 0x5678EF00

ID: embedded/crc-checksum-mismatch-bootloader

Also available as: JSON · Markdown · 中文
85%Fix Rate
88%Confidence
1Evidence
2023-11-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
STM32CubeProgrammer v2.14.0 active — — —
GCC ARM Embedded 13.2.Rel1 active — — —
OpenOCD 0.12.0 active — — —

Root Cause

The CRC32 checksum computed over the flash application region does not match the stored checksum, indicating corruption during programming, incomplete flash write, or a mismatch in CRC polynomial/seed.

generic

中文

对闪存应用程序区域计算的CRC32校验和与存储的校验和不匹配，表明编程期间损坏、闪存写入不完整或CRC多项式/种子不匹配。

Official Documentation

https://www.st.com/resource/en/application_note/an3155-how-to-use-the-crc-peripheral-in-stm32-mcus.pdf

Workarounds

  1. 85% success Re-program the flash using a verified programming tool (e.g., ST-Link CLI) with full erase and verify enabled: `st-flash --reset --format ihex write firmware.hex` 
    Re-program the flash using a verified programming tool (e.g., ST-Link CLI) with full erase and verify enabled: `st-flash --reset --format ihex write firmware.hex`
  2. 90% success Check CRC polynomial and seed match between bootloader and image generation script; ensure both use CRC-32 (0x04C11DB7) with initial value 0xFFFFFFFF. 
    Check CRC polynomial and seed match between bootloader and image generation script; ensure both use CRC-32 (0x04C11DB7) with initial value 0xFFFFFFFF.
  3. 70% success Ensure flash supply voltage (VDD) is within spec (2.7V-3.6V for STM32F4) during programming; brown-out can cause partial writes. 
    Ensure flash supply voltage (VDD) is within spec (2.7V-3.6V for STM32F4) during programming; brown-out can cause partial writes.

中文步骤

  1. Re-program the flash using a verified programming tool (e.g., ST-Link CLI) with full erase and verify enabled: `st-flash --reset --format ihex write firmware.hex`
  2. Check CRC polynomial and seed match between bootloader and image generation script; ensure both use CRC-32 (0x04C11DB7) with initial value 0xFFFFFFFF.
  3. Ensure flash supply voltage (VDD) is within spec (2.7V-3.6V for STM32F4) during programming; brown-out can cause partial writes.

Dead Ends

Common approaches that don't work:

  1. 80% fail

    If the root cause is a hardware flash issue (e.g., bad sector or voltage drop), re-flashing the same binary will produce the same CRC mismatch.

  2. 95% fail

    This bypasses safety entirely; a corrupted image may execute and cause undefined behavior or system failure.

  3. 100% fail

    The bootloader expects a specific polynomial and length; mismatch will always fail.