How to factory reset Nucleo F103RB board?
NUCLEO Board F103RB - Error in initializing ST-LINK device.
Reason: No device found on target.

Question

Here is what I did -

From CubeMX, I mistakenly change port configuration of port pin PA14 from SYS_JTCK-SWCLK to GPIO_Output.

Apparently this disabled the debug / programming channel of the target micro controller on the board.

Later I reset the port pin to its original function and tried to program the new firmware, but it doesn't work.

I get following error:

"Error in initializing ST-LINK device.

Reason: No device found on target."

Here's the complete console log -

STMicroelectronics ST-LINK GDB server. Version 5.3.2

Starting server with the following options:

Persistent Mode : Disabled

Logging Level : 1

Listen Port Number : 61234

Status Refresh Delay : 15s

Verbose Mode : Disabled

SWD Debug : Enabled

Target no device found

Error in initializing ST-LINK device.

I know that the ST-Link is working normally because I was able to update its firmware.

When I keep the reset button pressed while the debugging session is being initiated, it shows the following message "Error in initializing ST-LINK device.

Reason: Target held under reset."

Is there any way to reset the JTAG / SWD channel on the Nucleo board?

SShid · Accepted Answer

Thankfully I was able to recover from this seemed to be serious issue.

Apparently I had remapped an SWD pin to generic I/O, after which the ST Link couldn't communicate with the device.

Resetting the I/O configuration, starting with a default project nothing at all would work.

I tried playing with lot of configuration setting in the Debugger where I changed the Debug Probe from 'ST-LINK (ST-LINK GDB server)' to 'ST-Link (OpenOCD)'.

This simply worked! I don't know how did this fixed it but later when I restored the Debug Probe to 'ST-LINK (ST-LINK GDB server)', it too worked!

If someone else faces this issue, this solution might help.

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