OLED I²C driver for the AVR ATmega328

I developed an OLED I²C driver for the AVR ATmega328, written entirely using bare-metal, register-level programming—without using Arduino core, HAL, or third-party libraries.

Linkedin post link:
https://www.linkedin.com/posts/anees-kokadan_embeddedsystems-avr-atmega328-activity-7410919302746419200-kzIW?utm_source=social_share_send&utm_medium=member_desktop_web&rcm=ACoAABpp0PkBI2m3mwO5pKHlo96RE-5O-1S-AyY

Key aspects of the driver:
• Direct manipulation of ATmega328 TWI (I²C) registers
• Modular and reusable driver design
• Clean separation between low-level I²C routines and OLED display logic
• Optimized for clarity, portability, and future scalability
• Suitable for learning, debugging, and production-oriented firmware

This exercise strengthened my understanding of:
• AVR TWI state machine and status codes
• I²C protocol timing, ACK/NACK handling
• Writing maintainable drivers instead of monolithic application code

Developing drivers at this level builds a solid foundation for advanced embedded systems work and makes troubleshooting significantly easier compared to black-box libraries.

Full driver: https://lnkd.in/gpHmMwzX

hashtag#EmbeddedSystems hashtag#AVR hashtag#ATmega328 hashtag#BareMetal hashtag#I2C hashtag#OLED hashtag#DeviceDrivers hashtag#FirmwareEngineering hashtag#EmbeddedC hashtag#Microcontrollers