Embedded Systems Portfolio

Welcome to my Embedded Systems Portfolio. This document introduces several projects, highlighting their objectives, technologies, and current status.

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LED Blinky Projects

Zephyr RTOS Blinky on Raspberry Pi Pico

• Objective: GPIO control demonstration using Zephyr RTOS.
• Technologies: Raspberry Pi Pico, Zephyr RTOS, DeviceTree.
• Current Status: Complete.

FreeRTOS LED Blinky for Pico W, Pico W2, ESP32

• Objective: Basic FreeRTOS demonstration with task scheduling and GPIO control.
• Technologies: FreeRTOS, Raspberry Pi Pico W, Pico W2, ESP32.
• Current Status: Complete

PicoBook

• Objective: A compact device fetching and displaying book data via Wi-Fi.
• Technologies: Raspberry Pi Pico W, MicroPython, OLED display, Wi-Fi.
• Current Status: Complete.

Zephyr OS "Hello World" on Raspberry Pi Pico

• Objective: Minimal Zephyr OS application printing to USB serial.
• Technologies: Zephyr OS, RP2040.
• Current Status: Complete

PicoW Over-The-Air (OTA) Firmware System

• Objective: Dual-partition bootloader enabling OTA firmware updates.
• Technologies: RP2040, pico-sdk, assembly, linker scripts.
• Current Status: Complete - But inoperable. There were struggles with the bootloader and ROM and highlighted knowledge gaps. This work was the catalyst for a full re-understanding of low level work. Inspiring the DINO project.

ESP-NOW Remote Control Project

• Objective: Wireless remote control for toggling LEDs using ESP-NOW protocol.
• Technologies: ESP32-C3, ESP-IDF, ESP-NOW.
• Current Status: Complete

The Earth Rover

• Objective: Modular rover system using ESP-NOW and STM32 for real-time motor control and wireless ADC data transmission.
• Technologies: ESP32-C3, STM32L432KC, ESP-NOW, FreeRTOS, STM32CubeMX, CMake, SPI, DMA, TB6612FNG, CD4053BE.
• Current Status: Communication functional; currently refining SPI packetization and synchronization.

Dino (Discrete Integrated NISC Operator) CPU

Dino v0.01 – Manual Logic Sequencer

• Objective: CPU-free logic sequencer manually steps through memory and outputs 8-bit values via LEDs.
• Technologies: SN74LS590N counters, 555 timer, SRAM, DIP switches, LEDs.
• Current Status: In Progress. Schematic Phase.

Dino v0.1 – 8-bit CPU Core

• Objective: Upgrade to a functional 8-bit CPU with ALU, registers, and basic arithmetic operations.
• Technologies: 74F382N ALU, SN74LS273N registers, DM74LS374 latch.
• Current Status: Planned

Dino v0.1.1 – Instruction Decoder & 7-Segment Display

• Objective: Adds instruction decoding and output display.
• Technologies: SN74LS138N decoder, 7-segment display drivers.
• Current Status: Planned