STM32F446 Bare‑Metal Drivers 🚀

A collection of bare-metal (register-level) C examples for the STM32F446RE microcontroller — no HAL or high-level libraries used. Learn by working directly with registers, exploring key peripherals, and building embedded systems skills.

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📁 Project Structure

Folder	Description
01_gpio	Basic GPIO output – LED blinking
02_GPIO_INPUT	Reading digital input from a push-button
03_UART_TX_RX	UART transmit and receive example
04_UART_TX_RX_Interrupt	UART using interrupt-driven communication
05_ADC_Continuous_Conversion	Continuous ADC sampling
06_I2C_Master	I2C Master communication
07_I2C_Slave	I2C Slave configuration
08_SPI	SPI Master communication
09_ADC1_ADC2_ADC3	Simultaneous ADC data from ADC1/2/3
10_Timer_gen	Basic timer – delay generation
11_Timer_interrupt_1s	Timer interrupt every 1 second
12_ADC_Interrupt	ADC sampling using interrupts
13_PWM	Multi-channel PWM outputs
14_Empty	Reserved for future examples
Chip_header	Common register definitions for STM32F446

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⚙️ Toolchain & Debugging

• MCU: STM32F446RE (Cortex-M4, 180 MHz)
• Toolchain Options:
  • STM32CubeIDE
  • ARM GCC / Makefiles
  • VS Code + Cortex-Debug + OpenOCD
• Debug Interface: SWD (ST-LINK or OpenOCD)

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🔨 Build & Flash

1. STM32CubeIDE:
   • Import each folder as a project
   • Ensure the correct startup file and linker script
2. Makefile + GCC:
   • Use arm-none-eabi-gcc
   • Flash with st-flash or OpenOCD

(Let me know if you'd like sample Makefiles inserted)

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📚 Learning Objectives

• Register-level access without abstraction
• Practical use of UART, I2C, SPI, ADC, Timers, and PWM
• Techniques for both polling and interrupt-based I/O
• Essential knowledge for embedded interviews and product development

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🔧 Next Steps

• Add individual README.md files per folder
• Create Makefiles for each example
• Include .gitignore and LICENSE (MIT recommended)
• Expand to other STM32 MCUs (e.g., F103, F767)

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👤 Author

Mayur Patil
— Embedded Engineer | Hardware Enthusiast
GitHub: MAYURDIGAMBARPATIL

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📄 License

Distributed under the MIT License – see LICENSE for details.