Update GPIO driver usage

[KenVanHoeylandt]

Recently the SDK removed GPIO functionality because pins are now exclusively claimed by a driver. That means the GPIO app can't claim pins that are already in use... except when it calls the ESP-IDF driver code directly, which is what the app now does.

Summary by CodeRabbit

• Refactor

  • Streamlined GPIO implementation for more efficient and reliable hardware interaction while preserving existing UI behavior.
  • Improved internal pin handling for consistent status reporting.

• Chores

  • App version bumped to 0.4.0 to reflect the update.

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

The GPIO app was modified to use the ESP-IDF GPIO driver directly instead of the HAL GPIO abstraction. CMakeLists.txt was updated to add the driver dependency. Gpio.cpp now includes driver/gpio.h, replaces HAL calls (e.g., tt_hal_gpio_get_level) with gpio_get_level((gpio_num_t)...), and uses a fixed GPIO_PIN_COUNT for sizing and loop bounds.

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Update GPIO driver usage' accurately reflects the main change: replacing HAL GPIO API calls with direct ESP-IDF GPIO driver calls due to SDK changes.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch gpio-updates

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[coderabbitai]

Actionable comments posted: 1

🧹 Nitpick comments (1)

Apps/GPIO/main/Source/Gpio.cpp (1)

14-18: Calling gpio_get_level on unconfigured pins — confirm this is intentional.

gpio_get_level((gpio_num_t)i) is called for every pin index without first configuring the pin direction via gpio_set_direction. Per the ESP-IDF docs, gpio_get_level can be called without prior configuration on most ESP32 variants (the input is always connected), but this is an implementation detail rather than a documented guarantee. Since this app is intentionally bypassing the HAL to read pins that may be claimed by other drivers, this is likely acceptable — just worth noting.