CMSIS-Pack  Version 1.5.0
Delivery Mechanism for Software Packs
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ZIP Compression Tools

Any ZIP software utility supporting the compression method DEFLATE can be used to create a Pack file. Simply, create the ZIP file and rename it to *.pack.

The compression tool 7-Zip supports command line calls and can be used in batch scripts like gen_pack.bat for automated Pack file creation (and verification with packChk.exe). Installers for 7-Zip are available for 32-bit and 64-bit Windows operating systems.