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# ftc-lib
## Yes, ts was generated... No I do not believe in an AI takeover
**ftc-lib** is a high-performance, state-machine-driven framework designed for FTC teams who prioritize clean code, modularity, and hardware optimization. It provides a robust abstraction layer over standard FTC OpModes, integrating **PedroPathing** for precision movement and **Panels (Sloth)** for live configuration and telemetry.
---
## 🚀 Key Features
* **Template Method Pattern:** A locked-down backend that handles the "boring stuff" (Bulk reads, FPS capping, Telemetry timing) so you only write robot logic.
* **Subsystem Architecture:** Fully isolated mechanisms with their own internal "Micro-States."
* **Hierarchical State Machines:** Orchestrate complex robot actions by mapping a "Global State" to specific "Subsystem States."
* **Automatic Hardware Optimization:**
* **Bulk Reads:** Automatically sets all expansion hubs to Manual Caching mode for the fastest possible loop times.
* **FPS Capping:** Prevents CPU/Battery waste by locking loop speeds to a target (e.g., 50 FPS).
* **Stateful PID Control:** A built-in PID utility that handles time-deltas ($dt$) and integral sums internally.
* **Unified Telemetry:** A joined engine that pipes data to both the Driver Station and the **Panels** dashboard simultaneously.
* **Live Tuning:** Centralized `Constants.java` utilizing `@Configurable` for real-time value editing without recompiling.
---
## 📂 Project Structure
```text
teamcode/
├── lib/ # The Core Framework (Don't touch)
│ ├── BaseStateOpMode.java # The engine that runs the robot
│ ├── Subsystem.java # The blueprint for all mechanisms
│ ├── SubsystemManager.java # Automates the lifecycle of subsystems
│ └── PIDController.java # Stateful math utility
├── subsystems/ # Your robot parts (Drivetrain, Lift, Intake)
├── util/ # Utilities (AutoTransfer, FPSCounter)
├── Constants.java # The "Control Panel" for the entire robot
└── opmodes/ # Your actual TeleOp and Autonomous files
```
---
## 🛠 Usage Guide
### 1. Define your Constants
Use the `Constants.java` file to store every hardware name, PID value, and speed multiplier.
```java
@Configurable
public static class LIFT {
public static double kP = 0.015;
public static int SCORING_POS = 2500;
}
```
### 2. Create a Subsystem
Inherit from `Subsystem`. Define "Micro-States" for this specific mechanism.
```java
public class LiftSubsystem extends Subsystem {
public enum LiftState { IDLE, EXTENDING }
private LiftState state = LiftState.IDLE;
@Override
public void update() {
// Run PID logic here
}
}
```
### 3. Build your TeleOp
Inherit from `BaseStateOpMode`. This gives you the `stateMachineUpdate()` hook where you map gamepad inputs to states.
```java
@TeleOp
public class MainTeleOp extends BaseStateOpMode {
@Override
protected void setupSubsystems() {
manager.register(new DriveSubsystem(), new LiftSubsystem());
}
@Override
protected void stateMachineUpdate() {
if (gamepad1.aWasPressed()) {
robotState = GlobalState.SCORING;
}
}
}
```
---
## ⚡ Performance Details
### The "Tick" Lifecycle
Every loop, `ftc-lib` executes in this strict order:
1. **Hardware Sync:** Clears Bulk Cache on all Hubs.
2. **Logic Tick:** Runs your `stateMachineUpdate()`.
3. **Subsystem Tick:** All subsystems calculate PIDs and update motor powers.
4. **Telemetry Gate:** If the `TELEMETRY_DELAY_MS` has passed, it pushes data to Panels and the Driver Station.
5. **Sync Sleep:** Adjusts thread sleep time to maintain a consistent `TARGET_FPS`.
### Auton-to-TeleOp Persistence
Using the `AutoTransfer` utility, this library can automatically carry over the robot's end-of-auton position (from **PedroPathing**) and the Alliance color into TeleOp, ensuring your field-centric drive and automation remain seamless.
---
## 📦 Dependencies
* [PedroPathing](https://github.com/pedropathing/pedro-pathing)
* [Panels/Configurables (Sloth)](https://panels.bylazar.com/)
* [Panels/Telemetry (Sloth)](https://panels.bylazar.com/)
---
## 🤝 Contribution
When adding new subsystems:
1. Ensure all hardware names are in `Constants`.
2. Ensure `publishTelemetry` only sends data when `GLOBAL.DEBUG_MODE` is true.
3. Never use `sleep()` inside a subsystem; use state timers instead.