Firmware RP2350 using UART Boot

[Fantonrko]

Hi, I finally got my hands on the RP2350, I want to try to flash it via UART Boot, this feature was added in new versions, but I don't quite understand how to do it.
I wrote a code for ESP32 which contains a .bin file and writes it to the RP2350. I managed to start the UART mode using SS and SD1 pins, but the subsequent loading of data blocks does not lead me to the result, the RP2350 just stops responding (as indicated in the datasheet) but does not write (to flash)/start the firmware.

I read that it is necessary to properly compile the .bin file, but I don't quite understand how to do it.

How exactly do you create your .bin file?

[burtyb]

For anyone else looking for an example of how to build for no_flash the PR raspberrypi/pico-examples#571 has a UART bootloader example.