I have a problem with Nucleo STM32F401RE board. For unknown reason the board stopped communicating with PC in debug modes, STM32CubeProgrammer, giving the errors such as: "Error: No STM32 target found!". The PC recognizes the board when connected, however, the PC shows that the board has only 12kB of free space, and inside the drive it contains FAIL.txt file which says the following: "The interface firmware FAILED to reset/halt the target MCU". I have tried the following to fix the problem (unsuccesfully):
- Updating ST-LINK
- Using "Connect under reset" mode in STMCubeProgrammer (also tried with pressing the reset button, setting the BOOT0 pin high etc.)
- Erasing chip in ST-LINK utility (also tried erasing with pressing the reset button etc.)
- Checking the connections between ST-LINK and MCU according to schematics. All connections are fine except for STLINK_TX and STLINK_RX which do not seem to have a contact between STLINK and MCU (could this be the problem or am I misunderstanding something?)
- Checking voltage regulators on board - all of them are outputting correct voltages
- Checking for heating components - the board is as cold as ice.
- All the jumpers are in place
Points worth mentioning:
- st-link LED LD1 is constantly red.
- ST-LINK seems to be functioning, because I was able to update the ST-LINK driver.
- STMCubeProgrammer recognizes the board correctly, shows the voltage of 3.3V, however still fails to connect to the MCU.
Given that electronics components nowadays are facing a crisis, I would love to revive this board instead of waiting for a month for a new board.
