Embedded Learning

Personal repository documenting my journey learning embedded systems development with ESP32 microcontrollers.

Hardware

Board	Architecture	Language	Framework
ESP32 (standard)	Xtensa LX6	C	ESP-IDF
ESP32-C3 Rust Board	RISC-V 32-bit	Rust	esp-hal (no-std) / ESP-IDF (std)

Repository Structure

embedded-learning/
├── esp32-c/              # ESP32 Xtensa with C/ESP-IDF
│   ├── projects/         # C projects
│   └── docs/             # C/ESP-IDF notes
├── esp32-c3-rust/        # ESP32-C3 RISC-V with Rust
│   ├── no-std/           # Baremetal projects (esp-hal)
│   │   ├── blinky/       # LED blinking
│   │   ├── gpio/         # GPIO input/output
│   │   └── uart/         # Serial communication
│   └── std/              # ESP-IDF + FreeRTOS projects
└── docs/                 # General embedded notes

Learning Path

Phase 1: Rust no-std (Baremetal)

• Blinky LED
• GPIO input (buttons)
• UART serial communication
• Timers and interrupts
• I2C sensors
• SPI displays

Phase 2: Rust std (ESP-IDF)

• FreeRTOS tasks
• WiFi connectivity
• HTTP client/server
• MQTT
• BLE

Phase 3: C with ESP-IDF

• Document previous Linux projects
• Port concepts from Rust to C

Toolchain Setup (macOS)

Rust ESP32-C3 (RISC-V)

# Install espup (ESP Rust toolchain manager)
cargo install espup
espup install

# Add RISC-V target
rustup target add riscv32imc-unknown-none-elf

# Install flash tools
cargo install espflash
cargo install cargo-espflash

# Optional: probe-rs for debugging
cargo install probe-rs-tools

C ESP-IDF (for later)

# Install ESP-IDF via Homebrew
brew install cmake ninja dfu-util
# Then follow ESP-IDF installation guide

Resources

Rust Embedded

• The Rust on ESP Book
• esp-rs/esp-hal - Hardware Abstraction Layer
• esp-rs/esp-template - Project templates
• Embedded Rust Book

C/ESP-IDF

• ESP-IDF Programming Guide
• ESP32-C3 Datasheet

Author

Felix Figueroa - Leonobitech