It's still slow but now it works much better, both CH32V003 and CH32V006.Link to the RP2040 binary : GithubNote that the CH32V006 is much faster by default, hence making the experience better.Sample vscode launch.json "version": "0.2.0", "configurations": [ { // Builds the firmware (preLaunchTask), loads it and stops at main. "name": "Debug (Swindle / SDI)", "type": "gdb", "request": "launch", "cwd": "${workspaceFolder}", "target": "${workspaceFolder}/target/riscv32ec-unknown-none-elf/release/ch32v003-rust-blink", "gdbpath": "${config:riscv_gdb}", "preLaunchTask": "Build (release)", "valuesFormatting": "parseText", //"showDevDebugOutput": "true", //"stopAtEntry": true, // this uses `tbreak main`, a software breakpoint; "hb main" below does not // Once the commands below are done the extension issues `run`, which //...