If the output window shows "0 Error(s), 0 Warning(s)," your was successful and your environment is fully configured!
MDK is the complete software development environment for a wide range of ARM Cortex-M, Cortex-R4, ARM7, and ARM9 processor-based devices. It includes: keil uvision download
Without these packs, you cannot compile code for your specific hardware. If the output window shows "0 Error(s), 0
If you try to build a large project and get an error, you have likely exceeded the 32KB limit of the free Lite version. You must either optimize your code, strip out libraries, or purchase a license. strip out libraries