UART Serial Communication

From serial protocol principles to interrupt-driven reception, building an STM32 UART driver and command processor with modern C++23.

Phase 1: Motivation

• Part 31: From Buttons to Serial — Why UART is the cornerstone of embedded communication

Phase 2: Hardware Fundamentals

• Part 32: UART Protocol in Detail — How to synchronize without a clock line
• Part 33: STM32 USART Peripheral — The serial engine inside the chip

Phase 3: HAL + Blocking I/O

• Part 34: HAL Initialization and Transmission — Making the chip speak
• Part 35: printf Redirection and Blocking Reception — Making the chip speak with printf, and teaching it to listen

Phase 4: Interrupt-Driven

• Part 36: Interrupt Fundamentals and NVIC — Letting hardware proactively notify the CPU
• Part 37: Lock-Free Ring Buffer — A safe channel between the ISR and the main loop
• Part 38: UART IRQ Handling and Callbacks — The complete puzzle of interrupt reception

Phase 5: C++ Abstractions

• Part 39: std::expected Error Handling — A better choice than exceptions in embedded systems
• Part 40: UART Driver Template — Zero-size abstractions and compile-time dispatch
• Part 41: Concepts + UartManager — Type-safe assembly
• Part 42: Command Processor and Full Walkthrough — From serial input to LED control

Phase 6: Summary

• Part 43: Common Pitfalls and Exercises — Mastering UART with flair