The STM32F100VET6 is a 32-bit ARM Cortex-M3 microcontroller designed for embedded systems. This versatile microcontroller is commonly used in industrial and consumer electronics, automotive applications, and more. In this article, we'll provide a comprehensive guide to getting started with the STM32F100VET6 – from hardware setup to programming basics.

Hardware Setup

Before you can begin code development and testing, you'll need to set up your hardware environment. Here's what you'll need:

STM32F100VET6 board

USB cable

Microcontroller programming software (such as Keil, STM32CubeIDE or Eclipse)

To get started, connect your STM32F100VET6 board to your computer using a USB cable. Choose your preferred programming software, then create a new project and select the STM32F100VET6 as your target device.

Basic Programming Concepts

Now that you have your hardware set up, it's time to start learning about the basic programming concepts and structures of the STM32F100VET6.

Registers

The STM32F100VET6 has a variety of registers that control various aspects of its operation. These registers include:

General-purpose input/output (GPIO) registers: Used to control pin states on the microcontroller

Clock control registers: Used to establish the system clock and timers

Interrupt (IRQ) registers: Used to configure interrupts and set priorities

Serial communication (USART) registers: Used to set up and control serial communication

Each register has a unique address in the memory of the microcontroller that is used to access its contents. Reading or writing to registers allows you to control the functionality of the STM32F100VET6.

Interrupts

Interrupts are a critical part of any microcontroller programming. They allow you to react to external events in real-time and can save power by triggering the microcontroller only when necessary.

The STM32F100VET6 supports external and internal interrupts. External interrupts are triggered by external signals, such as a button press or sensor reading. Conversely, internal interrupts are triggered by events within the microcontroller itself, such as timer overflows or memory protection violations.

Timers

Timers are a powerful feature of the STM32F100VET6 that allows you to control time-based operations. There are four general-purpose timers and two advanced timers available on the microcontroller, each with varying capabilities.

General-purpose timers are ideal for standard timekeeping and PWM generation. Advanced timers are better suited for complex timing scenarios such as motor control and waveform generation.

Programming in C

The STM32F100VET6 can be programmed in C or Assembly language, but for simplicity, we'll be covering programming in C.

Here's a basic "Hello World" program written in C for the STM32F100VET6 that toggles the state of GPIO pin 0 on the board:

include "stm32f10x.h" // Device headerint main(void){ // Enable GPIOC clock RCC->APB2ENR |= RCC_APB2ENR_IOPCEN; // Configure GPIOC pin 0 as output push-pull GPIOC->CRH &= ~GPIO_CRH_MODE0; // Clear the port configuration GPIOC->CRH |= GPIO_CRH_MODE0_0; // Set pin 0 to output at 10MHz GPIOC->CRH |= GPIO_CRH_MODE0_1; // Set pin 0 to output at 10MHz GPIOC->CRH &= ~GPIO_CRH_CNF0; // Clear pin 0 configuration GPIOC->CRH |= GPIO_CRH_CNF0_0; // Set pin 0 as general purpose push-pull while(1){ // Toggle the state of the GPIO pin GPIOC->ODR ^= GPIO_ODR_ODR0; // Delay for approximately 1 second for(int i = 0; i < 1000000; i++); }}

This program enables the GPIOC clock, configures pin 0 as output, then toggles the state of the pin every second using a for loop-based delay.

Conclusion

In this article, we've provided a comprehensive guide to getting started with the STM32F100VET6 microcontroller. From hardware setup to basic programming concepts and structures, you should now have a foundation from which to continue your microcontroller programming journey. Happy coding!