I work primarily at the boundary between hardware and software.

My projects usually start close to the hardware — registers, buses, peripherals, interrupts, memory and timing — and build upward into firmware, drivers and complete embedded systems.

Hardware
   ↓
Registers / Peripherals
   ↓
Firmware
   ↓
Drivers / RTOS
   ↓
System Software
   ↓
Applications

• Bare-metal firmware
• Register-level microcontroller software
• Interrupt-driven systems
• Embedded drivers
• FreeRTOS applications
• MicroPython systems
• FPGA logic and Verilog
• Embedded graphical interfaces
• Custom embedded operating-system components
• PCB-based hardware prototypes

Understand
    ↓
Design
    ↓
Build
    ↓
Measure
    ↓
Debug
    ↓
Improve

I prefer understanding what happens underneath an abstraction before depending on it.

Embedded system environment for ESP32-S3

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Zeno is an experimental embedded system built around the ESP32-S3, combining MicroPython, ESP-IDF, custom system services, storage, a graphical interface and application execution.

ESP32-S3
   │
   ├── ESP-IDF / FreeRTOS
   │
   ├── MicroPython
   │
   ├── System Services
   │      ├── Storage
   │      ├── Applications
   │      ├── Process Management
   │      └── Package Management
   │
   └── GUI
          ├── Display
          └── Touch

• Custom boot and recovery paths
• ESP32-S3 system integration
• Filesystem architecture
• Application execution environment
• Cooperative scheduling
• Native C extensions
• Display-driver integration
• Touch-enabled GUI
• SD-card storage
• MicroPython runtime integration

ESP32-S3
   ↓
Boot
   ↓
Kernel / System Services
   ↓
Runtime
   ↓
Applications
   ↓
Display + Input

Embedded robotics platform

A hardware-focused robotics platform built around an MCU, inertial sensing, environmental sensing and motor control.

Sensors
   ↓
MCU
   ↓
Control Logic
   ↓
Motor Driver
   ↓
DC Motors

Hardware includes:

• MPU6050
• DHT11
• TB6612FNG
• N20 gear motors
• Arduino Nano
• Wireless interfaces
• Li-ion power system

Focus areas:

Sensor Interfaces · Motor Control · Embedded Control · Power

FPGA + microcontroller development

Exploring digital logic design and hardware acceleration using the Shrike FPGA platform.

Verilog
   ↓
RTL
   ↓
Synthesis
   ↓
FPGA Logic
   ↓
Hardware

Areas of interest:

• Verilog
• RTL design
• Digital logic
• FPGA peripherals
• MCU ↔ FPGA interfaces
• Hardware-level experimentation

Understanding microcontrollers below the Arduino abstraction

Working directly with MCU registers and peripherals to understand how embedded systems operate underneath higher-level frameworks.

Register
   ↓
Peripheral
   ↓
Interrupt
   ↓
Firmware
   ↓
Application

Focus:

GPIO · Timers · PWM · ADC · UART · SPI · I²C · Interrupts

                    DIGITAL HARDWARE
                          │
          ┌───────────────┼───────────────┐
          ↓               ↓               ↓
        MCU              FPGA            PCB
          │               │               │
      ESP32 / AVR       Verilog       Prototyping
          │               │               │
          └───────────────┼───────────────┘
                          ↓
                       SYSTEM

ESP32 · ESP32-S3 · ESP32-C3 · ESP32-C6 · ESP8266 · AVR

Renesas FPGA · Verilog · RTL

PCB Design · Digital Electronics · SMD · Through-Hole · Power Electronics

GPIO · UART · SPI · I²C · PWM · ADC

C / C++
    ↓
Firmware
    ↓
Drivers
    ↓
RTOS / System Software
    ↓
Applications

FPGA
 ↓
Verilog / RTL
 ↓
Digital System Design

ESP32-S3
 ↓
ESP-IDF
 ↓
FreeRTOS
 ↓
MicroPython
 ↓
Embedded Systems

AVR
 ↓
Registers
 ↓
Peripherals
 ↓
Bare Metal

Hardware
 ↓
PCB
 ↓
Firmware
 ↓
System

Hardware → Firmware → Systems

Building close to the silicon.