lnBMP + RP2040 ?
In the eternal goal of having the smaller debugger possible, i ended up porting the strict minimum of lnBMP on top of the RP2040 chip. Tinyusb is available so that part was not problem. Clang + Rust, no problem either. The pico sdk is providing the basics , already CMake based. Using DMA+Uart was a bit more complicated but not that much at the end of the day. And ...It works !, expect nice pics of a lnBMP + RP2040 zero in a 3D printed case soon.