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--- project:arm_debugging:start [2019/01/27 23:19] – [Chipwhisperer + UFO target board + STLink v2 + STM32F4] SHUNTL+SHUNTH jumper and other gotchas for programming abyssal
+++ project:arm_debugging:start [2019/08/21 16:00] – [Example: Unbricking (restoring) Proxmark bootloader] trimen
@@ Line 290: / Line 290: @@
 The code halts processor, erases bootloader sectors, then writes bootloader from ''/path/to/booloader.elf''. After power cycling the bootloader should be working if the elf file is correct.
+If you receiving errors:
+<code>
+Info : TAP autoX.tap does not have IDCODE
+.(some more info)
+Warn : Unexpected idcode after end of chain: XY 0x00000000
+.(some more warinings)
+Error: auto0.tap: IR capture error; saw 0x0000 not 0x0001
+</code>
+It's because your CPU has locked flash/JTAG.
+To solve this connect pin 55(ERASE) of CPU to 3.3V for at least 0.5sec. It will trigger erase of flash content and enable JTAG.
+This is happening mostly on cheap clones of proxmark3 Easy.
 ===== J-link connected to Proxmark =====