Core Programming

Advanced patterns used by XBot to build robust, testable robot code.

You should complete the Curriculum before starting these modules. They build on the basics you learned there.

Modules

Module	What You Will Learn	Time
Dependency Injection	How Dagger wires everything together automatically	30 min
Providers & Factories	Creating objects with runtime parameters	20 min
Command-Based Programming	WPILib's command framework	30 min
Maintainers	Continuous PID maintenance with human override	25 min
Swerve Drive	Holonomic driving with independent wheel control	40 min
Properties & Tuning	Runtime-tunable values for quick iteration	15 min

Why These Patterns Matter

These patterns solve real problems that come up when writing robot code:

• Dependency Injection keeps your code testable (swap real hardware for mocks)
• Factories let you create objects with values only known at runtime
• Maintainers handle the transition between human and automatic control
• Properties let you tune values without rebuilding code

Each module links to the actual XBot source code so you can see how the patterns are used in competition robot code.