Working with STM32 Peripherals

01 Touring the STM32 Nucleo L433RC-P for Peripheral Projects Map the STM32 Nucleo L433RC-P board features that matter for peripheral projects: ST-LINK, power, reset, user LED, user button, headers, and expansion connectors. 02 Blinking an LED on STM32 Without Magic Blink the Nucleo L433RC-P user LED by identifying the board pin, enabling the GPIO peripheral clock, configuring output mode, and toggling the pin deliberately. 03 Reading a Button on STM32 Read the Nucleo L433RC-P user button as a GPIO input, handle active logic level correctly, and add a simple debounce check before using the button to control firmware behavior. 04 Understanding STM32 Clocks Enough to Build Projects Learn the practical STM32 clock concepts needed for timers, UART, I2C, SPI, delays, and peripheral bring-up without turning the clock tree into a reference manual. 05 Using Timers on STM32 Use an STM32 hardware timer for periodic work by connecting clock assumptions, prescalers, auto-reload values, update events, and a simple LED timing example. 06 UART Logging on STM32 Set up UART output on STM32 for simple firmware logs, connect baud-rate settings to clock assumptions, and use serial output alongside LEDs and the debugger. 07 I2C on STM32 for Real Modules Bring up STM32 I2C for real breakout modules by checking wiring, pull-ups, addresses, timing, HAL return codes, and bus-level debugging assumptions. 08 SPI on STM32 for Real Modules Bring up STM32 SPI for real modules by checking SCK, MOSI, MISO, chip select, mode, baud prescaler, GPIO alternate functions, and transaction debugging. 09 Organizing a Small STM32 Firmware Project Organize a small STM32 firmware project after adding GPIO, timers, UART, I2C, and SPI by separating board support, peripheral setup, drivers, and application code.