DriverTest.ino File Reference

Detailed Description

ESP32 Generic Driver Test - Tests all available LED channel drivers.

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OVERVIEW

This example demonstrates how to:

1. Query available LED drivers at runtime using FastLED's Channel API
2. Test each driver by sending LED data through it
3. Validate that platform-specific expected drivers are present

The test runs automatically on startup and prints results to Serial.

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HOW IT WORKS

FastLED's ESP32 implementation provides multiple LED driver backends:

┌─────────────────────────────────────────────────────────────────────┐ │ Driver │ Description │ Typical Use Case │ ├──────────┼─────────────────────────────────┼────────────────────────┤ │ RMT │ Remote Control peripheral │ General purpose │ │ SPI │ Serial Peripheral Interface │ High-speed strips │ │ I2S │ Inter-IC Sound (LCD CAM mode) │ ESP32-S3 parallel │ │ PARLIO │ Parallel I/O (RMT5 successor) │ ESP32-C6/H2/P4 │ │ UART │ Universal Async Transmitter │ Fallback option │ │ LCD_RGB │ LCD RGB interface │ ESP32-P4 only │ └──────────┴─────────────────────────────────┴────────────────────────┘

Each platform has different drivers available based on hardware support. This test automatically detects the platform and validates the expected drivers are present.

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WIRING

ESP32 Board LED Strip ┌─────────┐ ┌─────────┐ │ │ │ │ │ GPIO 2 ├─────────┤ Data In │ │ │ │ │ │ GND ├─────────┤ GND │ │ │ │ │ │ 5V ├─────────┤ VCC │ │ │ │ │ └─────────┘ └─────────┘

Note: Adjust DATA_PIN in PlatformConfig.h if using a different pin.

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SERIAL OUTPUT EXAMPLE

+================================================================+ | ESP32 Generic Driver Test | | Tests all available LED channel drivers via Channel API | +================================================================+

Platform: ESP32-S3 Data Pin: 2 LED Count: 60

+================================================================+ | DRIVER VALIDATION FOR ESP32-S3 | +================================================================+

Expected drivers (4):

• SPI
• RMT
• I2S
• UART

Available drivers (4):

• SPI (priority: 2, enabled: yes)
• RMT (priority: 1, enabled: yes)
• I2S (priority: -1, enabled: yes)
• UART (priority: 0, enabled: yes)

Validation results: [PASS] SPI driver found [PASS] RMT driver found [PASS] I2S driver found [PASS] UART driver found

TEST_SUITE_COMPLETE: PASS

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FILES IN THIS EXAMPLE

DriverTest.ino - Main sketch (this file) PlatformConfig.h - Platform detection, pin/LED configuration TestRunner.h - Test framework and driver testing logic

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Definition in file DriverTest.ino.

#include <FastLED.h>
#include "PlatformConfig.h"
#include "TestRunner.h"

Include dependency graph for DriverTest.ino:

Go to the source code of this file.

Functions
void	loop ()
void	setup ()

Variables
CRGB	leds [NUM_LEDS]