QEMU is a free and open-source emulator that performs hardware virtualization. Official reference can be found here.
[env:myenv] platform = ... board = ... debug_tool = qemu
|SiFive||SiFive brings the power of open source and software automation to the semiconductor industry, making it possible to develop new hardware faster and more affordably than ever before.|
|FreeRTOS||FreeRTOS is a real-time operating system kernel for embedded devices that has been ported to 40 microcontroller platforms|
|Freedom E SDK||Open Source Software for Developing on the SiFive Freedom E Platform|
|Zephyr RTOS||The Zephyr Project is a scalable real-time operating system (RTOS) supporting multiple hardware architectures, optimized for resource constrained devices, and built with safety and security in mind|