This repository contains 20 different driver projects developed entirely at the Register level for the STM32F103 (Cortex-M3) microcontroller, without using any high-level libraries (HAL, LL, or SPL).

The primary objective of this study is to gain a deep understanding of how hardware peripherals operate and to develop high-performance, optimized drivers. The projects cover communication protocols and hardware architectures critical for defense industry standards.

1. 01_GPIO_Blink: Basic LED control through RCC and GPIO register manipulation.
2. 02_UART_Hello_World: Introduction to asynchronous serial communication using the USART2 peripheral.
3. 03_UART_Receiver: Data reception from the external world using the polling method.
4. 04_Timer_Basic_Delay: Creating hardware delays using the general-purpose Timer (TIM2).
5. 05_ADC_Single_Channel: Reading sensor data using a 12-bit analog-to-digital converter.
6. 06_PWM_LED_Brightness: Brightness control via PWM signals generated through a timer.
7. 07_I2C_Scanner_Master: Detecting devices on the data bus using the I2C protocol.
8. 08_SysTick_Delay: Professional delay function utilizing the timer embedded in the ARM Cortex-M core.
9. 09_SPI_Master_Driver: High-speed SPI communication architecture and data transmission.
10. 10_External_Interrupt_EXTI: External interrupt management with NVIC and EXTI units.
11. 11_Watchdog_IWDG: Independent Watchdog Timer to protect against system hangs.
12. 12_Internal_Flash_Write: Internal flash memory driver for data persistence during power loss.
13. 13_CRC_Calculation: Hardware error checking for the verification of data packets.
14. 14_Power_Management: Low power consumption strategies using Sleep Mode and the WFI instruction.
15. 15_Real_Time_Clock_RTC: Hardware clock tracking with second-level precision using the LSE crystal.
16. 16_DMA_MemToMem: High-speed memory-to-memory data transfer without CPU overhead.
17. 17_UART_DMA_Transmit: Continuous UART data transfer supported by DMA.
18. 18_Timer_Input_Capture: Measuring the frequency and period of incoming signals.
19. 19_PWM_Input_Measurement: Full analysis of a PWM signal (Duty Cycle & Frequency) using a single pin.
20. 20_CAN_Bus_Base_Driver: Driver for the CAN protocol, an aerospace and automotive industry standard.

• Hardware: STM32F103RBT6 (Nucleo-F103RB)
• Development Environment: STM32CubeIDE (Bare-Metal C)
• Architecture: ARM® Cortex®-M3

Developer: Yunus Kunduz
YouTube: CozumLab