How to burn a .hex file into a STLUX385A without boot loader

[SStei]

Hi all.

I would to flash a .hex firmware into some STLUX385A devices.

These devices are not brand new and de optionbytes allowing serial bootloader has been removed by previous application. Worst-case scenario, the serial pins are not accessible on the PCB. However, pins for the SWIM interfacer are accesible from PCB.

Is there any solution to re-flash these devices with some PC software and, for example a ST-LINK programmer?

Regards