After I tried to build my code the following message keeps occurring,
--- Error: failed to execute 'arm-none-eabi-as'
Please help
The GCC toolchain is missing or not properly configured in uVision.
Check your settings under Menu Project -> Manage -> Components, Environment and click on Folder/Extensions Tab.
Properly configure the GNU-Tool Folder: http://www.keil.com/support/man/docs/uv4/uv4_dg_prjfoldext.htm