Your exclusive tool does not fail. It forces the hardware to comply.
# Step 2c: Issue Mass Erase (FLASH_CR bit 2) jlink.memory_write32(0x40022010, [0x00000004]) # Set MER bit jlink.memory_write32(0x40022010, [0x00010004]) # Start erase (STRT bit) writing flash programmer fail unlock tool exclusive
print("Mass erase successful. Security fuses cleared.") After a mass erase, the device is virgin. The "programmer fail" state is gone. However, our job isn't done. A true unlock tool must also re-write a valid bootloader to prevent re-locking. Your exclusive tool does not fail
Now go write that tool. And the next time your programmer screams "Fail," you’ll know exactly how to reply. Have your own exclusive unlock routine? Contact the editors at Embedded Hardware Weekly. Security fuses cleared
This article is designed to be a definitive resource for embedded systems engineers, hardware hackers, and repair technicians facing the dreaded "device locked" or "programmer fail" error. By: Embedded Hardware Staff
Your exclusive tool does not fail. It forces the hardware to comply.
# Step 2c: Issue Mass Erase (FLASH_CR bit 2) jlink.memory_write32(0x40022010, [0x00000004]) # Set MER bit jlink.memory_write32(0x40022010, [0x00010004]) # Start erase (STRT bit)
print("Mass erase successful. Security fuses cleared.") After a mass erase, the device is virgin. The "programmer fail" state is gone. However, our job isn't done. A true unlock tool must also re-write a valid bootloader to prevent re-locking.
Now go write that tool. And the next time your programmer screams "Fail," you’ll know exactly how to reply. Have your own exclusive unlock routine? Contact the editors at Embedded Hardware Weekly.
This article is designed to be a definitive resource for embedded systems engineers, hardware hackers, and repair technicians facing the dreaded "device locked" or "programmer fail" error. By: Embedded Hardware Staff