as part of a larger project, I want to connect a custom JTAG-based debugger to the Cortex M3 present on the Nucleo STM32 L152RE.
My debugger has already been fully tested on other development boards and works correctly.
I have connected each of the JTAG cables to the proper pins of the nucleo following the available documentation and I have disconnected the ST-link jumpers.
However, this configuration does not work (no meaningful signal on TDO).
I have not found any useful information online and all my experiments failed.
Is there any other step I should do to be able to use the JTAG?
Thank you in advance!