https://www.keil.arm.com/packs/geckoplatform_efr32sg28_dfp-siliconlabs/versions/
Arm Keil | Silicon Labs GeckoPlatform_EFR32SG28_DFP
Keil MDK and Keil Studio. As flexible as you are: from cloud to desktop, from CLI to GUI, running on macOS, Linux, and Windows
arm keilsilicon labsdfp