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With StickOS, you no longer have to install a software development environment on the host computer; likewise, you no longer have to connect any kind of flash programmer or debug hardware to the host computer, nor to the MCU.
More importantly, though, with StickOS you no longer have to study a 500+ page MCU Reference Manual in order to use the MCU external pins and internal peripherals -- you simply pick the MCU with the pins and peripherals you want and StickOS manages them all for you. You then supply only the high-level algorithmic control statements that bind the functionality of the pins and peripherals together -- nothing more.
The bottom line is that using only a terminal emulator connected to an MCU running StickOS BASIC, you can easily edit a BASIC program and interactively debug it using breakpoints, assertions, watchpoints, single-stepping, execution tracing, live variable and pin examination and manipulation, edit-and-continue, etc. You can then save the BASIC program to the internal flash filesystem, and finally set the BASIC program to autorun autonomously when the MCU powers-up.
CPUStick™ and StickOS® -- Embedded Systems Made Easy!