fitgen

fitgen is a program that given a FIT profile generates Go code for fit. It takes as input the official FIT profile specification workbook and outputs Go type, message and profile definitions.

Consult the Wiki for information about profile generation.

Prerequisites

• FIT SDK Zip or workbook file available.

Usage

usage: fitgen [flags] [path to sdk zip, xls or xlsx file] [output directory]
  -hrst
        handle quirk where needed 'heart rate source type' field not set as active in official profile spreadsheet
  -sdk string
        provide or override SDK version printed in generated code
  -test
        run all tests in output directory after code has been generated
  -timestamp
        add generation timestamp to generated code
  -verbose
        print verbose debugging output for profile parsing and code generation

Global and product profiles

The complete specification of types and messages for the FIT protocol is called the "Global Profile". A "Product Profile" is a subset of the Global Profile, only including a subset of type and message definitions. A custom product profile is a convenient way of controlling struct sizes and memory usage.

The fitgen tool supports generating code for custom product profiles. This can be done by editing the SDK profile workbook and invoking fitgen. Every field definition with a value greater than zero in the EXAMPLE column of the Messages sheet will be included in the generated code.

The fit package will always use the official FIT product profile bundled with the SDK. It would be natural to fork the fit repository if you want to use your own custom profile.

See Section 3, "Overview of the FIT File protocol" [1], for more information about FIT product profiles.

References

[1] Flexible & Interoperable Data Transfer (FIT) Protocol. http://www.thisisant.com/resources/fit/