Hello,
Are you wanting to program using FreeRTOS and hoping there is a ready-made blocks-based editor available so that you can use blocks instead of C to program? In that case, unfortunately, the answer is no, I'm not aware of any blocks-based editor for FreeRTOS.
Or are you wanting to create a blocks-based editor for FreeRTOS that other people can use to program with blocks? While this is theoretically possible, it is likely to be quite challenging. Since FreeRTOS uses C, you would need to create custom blocks that generate C code. This is not a trivial undertaking and I'm not aware of any other projects that have written a C generator for Blockly. Blockly was designed to teach simpler coding fundamentals and lacks some features you might want for C such as static types and scoped variables. If you'd like to learn more about what this would take, you should start with our
codelabs, specifically the Getting Started and Code Generators codelabs. Creating a new generator from scratch will also probably involve some amount of reading the existing generators to understand how they work, as the written documentation can be somewhat sparse on details.
Best,