Embedded C/C++ & RTOS Firmware Engineering

Direct register configuration, hardware timer interrupts, DMA controllers, and low-latency state machines without OS overhead.

• Sub-microsecond interrupt latency for power electronics and motor control
• Memory footprint optimization for resource-constrained flash/RAM
• Peripheral drivers: SPI, I2C, UART, ADC with DMA ring buffers

Deterministic preemptive multitasking, priority inversion prevention, queues, mutexes, and thread-safe driver architectures.

• FreeRTOS & Zephyr RTOS deployment on Cortex-M0+/M4/M7 & ESP32
• Modular task segmentation isolating network stacks from time-critical control
• CMSIS-RTOS2 compliance for portable embedded architecture

Dual-bank flash partitioning, cryptographic signature verification, fallback rollback, and Over-the-Air firmware updates.

• Secure boot with hardware cryptographic engines (AES-256, ECC, SHA-256)
• Cellular, Wi-Fi, Ethernet, and Sub-1GHz OTA transport layers
• Automated fallback to golden factory image upon watchdog trip or validation failure

Robust implementation of industrial protocols for SCADA, PLCs, automotive sub-assemblies, and smart sensor nodes.

• CAN 2.0B, CAN-FD, and J1939 with hardware acceptance filter configuration
• Modbus RTU (over RS-485 transceiver) and Modbus TCP master/slave
• MQTT over TLS 1.3 for secure cloud telemetry to AWS IoT / Azure IoT