Thulasi raman S

Embedded Systems Engineer (R&D) with hands-on expertise in Embedded C/C++, bare-metal firmware development, and register-level programming on ARM Cortex-M (STM32) and PIC microcontrollers. Experienced in low-level peripheral driver development for GPIO, UART, SPI, I2C, ADC, PWM, and BLE, custom linker scripting, GCC ARM toolchain, and bare-metal task scheduling. Proficient in Makefile-based build systems, ELF binary analysis, Git version control, and AI-assisted coding workflows.

Passionate about firmware R&D, product development, and embedded system innovation across IoT, industrial, and communication domains.

Embedded Systems Engineer Intern – STM32 / ARM Cortex-M - Argyn Technologies - Tamil Nadu, India

(2025-03 - 2025-12)

• Developed bare-metal firmware for STM32 (ARM Cortex-M4) without HAL libraries — directly programming peripheral registers using reference manuals and datasheets.
• Implemented production-grade low-level drivers for GPIO, UART, SPI, I2C, ADC, Timers, and PWM from scratch.
• Wrote custom linker scripts (.ld) defining FLASH/SRAM memory regions, .text, .data, .bss sections, and symbol addresses for bare-metal boot.
• Developed startup code (stm32 startup.c) including Reset Handler, ISR vector table, .data copy from FLASH to SRAM, and .bss zero initialization.
• Built complete Makefile-based build system using arm-none-eabi-gcc cross-compiler targeting ARM Cortex-M4 (Thumb mode).
• Analyzed compiled ELF binaries using arm-none-eabi-objdump and memory map files for section placement verification and size optimization.
• Implemented bare-metal task scheduler with SysTick-based context switching, PSP stack management, and multi-task execution (idle + 4 user tasks).
• Configured hardware interrupts using NVIC for deterministic, real-time embedded control applications.
• Debugged embedded systems using register inspection, logic analyzer, breakpoints, and ELF analysis for hardware-software integration issues.

Firmware Engineer Intern – PIC Microcontroller - Argyn Technologies - Tamil Nadu, India

(2025-03 - 2025-07)

• Developed Embedded C firmware for PIC16F877A using register-level programming in MPLAB X IDE.
• Implemented UART serial communication for real-time data transfer and live debugging across multi-device configurations.
• Interfaced RTC, sensors, and actuators using timers and ADC modules for real-time embedded control.
• Designed timer-based scheduling and PWM motor control systems for actuator and motor management.
• Optimized firmware for minimal memory footprint and maximum execution efficiency on resource-constrained microcontrollers.

Industrial Intern – Embedded Systems & Electronics - SunShiv Electronics - Tamil Nadu, India

(2025-06 - 2025-06)

• Worked on embedded control systems and industrial electronics applications in a production environment.
• Designed and validated circuits using Proteus simulation; assisted in PCB design and component selection for hardware prototypes.

B.E. - Electronics and Communication Engineering - Government College of Engineering, Bargur (2022 - 2026)

Higher Secondary Certificate (HSC) - Vailankanni Matric Hr Sec School (2021 - 2021)