STM32F3 Bare-Metal Peripheral Drivers Development

Explore how microcontroller pins group into ports and become general-purpose inputs/outputs or alternate functions for peripherals such as UART and ADC, via GPA registers and hp/apb buses and clock options.

Create a gpio output driver for stm32 f3 using vendor header files to access registers directly, after downloading the f3 package and configuring include paths.

Develop a gpio input driver by enabling port c clock, configuring pc13 as input, and reading idr bit 13 to turn the lcd off when pressed and on when released.

Explore the UART protocol and serial versus parallel communication. Understand asynchronous and synchronous modes, baud rate, start and stop bits, parity, word length, flow control, and duplex options.

Develop a UART transmitter driver for the STM32F3. Enable the USART on APB1, configure PA pins to AF7, compute baud rate, and enable transmitter with proper control register settings.

Test the UART transmitter driver by writing data, waiting for the transmit data register empty flag in the status register, then transmit characters.

Retarget printf to the STM32F3 Ottati driver by implementing __io_putchar and wiring it to the UART write function, then use printf to display Hello from STM32F3 on the board.

Learn to modularize a STM32F3 bare-metal UART TX driver by refactoring into separate source and header files, exposing prototypes, updating includes, building, and flashing to the board.

Develop and initialize a UART RX driver for STM32F3 by enabling the GPIO clock, configuring pin 3 to alternate function mode, selecting AF7 for USART3, and enabling the receiver.

Master the UART rx driver by reading the receive data register only when not empty, using the read data register not empty flag to return the read data.

Explore the analog to digital converter, a data acquisition device, and how transducers convert physical quantities to voltage or current. Understand how ADC resolution and reference voltage set step size.

Explore adc independent modes on the STM32F3, including single and multi-channel options. Understand single channel and multi-channel conversions, continuous modes, injected conversion, 16 channels, and configurable sampling times.

Develop a bare-metal adc driver for stm32f3 by selecting adc modules, enabling access, configuring analog mode, and implementing init, activate, and read functions.

Enable adc clock and set analog mode for reliable conversions. Configure adc common parameters, trigger source, conversion mode, and sequence using the adc registers.

Develop and enable the STM32F3 ADC driver by configuring the internal voltage regulator and control register, then start conversions and read the data register for single and continuous modes.

Enable adc continuous conversion by setting the adc configuration register bits for continuous mode, then run the project on the board to observe continuous channel values.

simplify the ADC driver by reverting to direct register access, clearing bits 16 and 17 in the CCR to apply HCO divided by two, and using the default software trigger.

Explore the system tick timer, a 24-bit down counter in cortex microcontrollers used as the heartbeat of real-time systems, with reload and current value registers to compute delays.

Develop a precise delay function using the SysTick timer on a Cortex microcontroller, configuring the reload value, clock source, and enable bit, then wait for the current value flag.

Explore the overview of general purpose timers, including time base generation, input capture for measuring external frequency, and output compare with one powerless mode, plus auto reload and pre-schooler settings.

Develop a bare-metal general purpose timer driver by enabling the timer module on the APB bus, configuring the auto-reload value for a one-second interval, and polling the update interrupt flag.

Explore how interrupts switch the CPU from polling to event-driven service, implement interrupt service routines, understand vector table and NVIC, manage external interrupt lines, and configure priorities and states.

Develop a gpio interrupt driver for PC13 by enabling clock access, configuring PC13 as an input, unmasking irq line 13, setting falling-edge trigger, and enabling the nvic interrupt.

Test the input interrupt driver by implementing the exact interrupt handler named in the vector table, reading pending bit 13, and clearing the flag on a button press.

Develop a systick interrupt driver for stm32f3 by enabling the systick interrupt, loading eight million cycles for one second, and using a callback to print message and toggle an led.

Develop a timer interrupt driver for stm32f3 by enabling update interrupts, forcing update generation, and implementing a callback that executes code on each timer period, demonstrating a 1 Hz example.

Develop an adc interrupt driven driver for the atc module on stm32f3 bare-metal peripherals, enabling end-of-conversion interrupts, implementing an interrupt handler and adc data read with a callback and print.

Learn the spi protocol basics, including master-slave communication, mosi and miso lines, sclk and slave select, and single versus multiple slave configurations, with clock polarity and phase modes.

Develop a SPI driver to configure and read data from an accelerometer, handling gpio initialization, alternate function setup, pull-downs, and slave select on SPI1.

Configure the spi module by enabling its clock, setting baud rate to apb clock divided by four, enabling full duplex master mode with 8-bit data, and enabling software slave management.

Implement spi1 transmit and receive functions with a data register pointer, looping over the buffer and waiting for transmit buffer empty and receive buffer not empty, plus clearing overruns.

Learn to configure the ADXL345 accelerometer over SPI by using the memory map to set data format and power control, then read X, Y, Z data from the data registers.

Test the adxl345 accelerometer spi driver by enabling device, reading two data bytes, forming a 16-bit value, converting to g with 0.0078, and observing changes in live expressions while shaking.