●IIC Bus 1. Concept of IIC I²C stands for Inter-Integrated Circuit, using two bidirectional lines: one Serial Data Line (SDA) and one Serial Clock (SCL). SCL: The rising edge inputs data into each EEPROM device; the falling edge drives the EEPROM device to output data (edge-triggered). SDA: The bidirectional data line is an open-drain configuration, … Read more
For those familiar with computers, the BIOS (that blue interface) may not be too strange, as it is the startup code for the computer. Without BIOS, a computer is destined to be a brick! The BIOS mainly does some preparatory work before booting, such as setting the system time and boot order… but I digress. … Read more
Click the blue text to follow us 0 Preface: Previously, we learned about STM32CubeIDE and provided the official download link for STM32CubeIDE. This time, we will share the basic configuration required for STM32 projects in STM32CubeIDE, including the configuration of the UART peripheral. 1. Download link for STM32CubeIDE: https://www.st.com/zh/development-tools/stm32cubeide.html Note: The image indicates a Windows … Read more
STM32 has three different clock sources that can be used to drive the system clock (SYSCLK): 1: HSI oscillator clock (internal clock) 2: HSE oscillator clock (external clock, provided by the crystal) 3: PLL clock (Phase-Locked Loop clock) These devices have the following two secondary clock sources: (1) 40kHz low-speed internal RC, which can be … Read more
C language is essential foundational knowledge in microcontroller development. This article lists some common C language basics encountered while learning STM32. 1 Bit Manipulation First, we will explain several bitwise operators, followed by tips for using bitwise operations. The C language supports the following six types of bitwise operations: Next, we will focus on some … Read more
Reminder: This article briefly reviews the relevant knowledge points of EXTI and NVIC, analyzing the external interrupt callback mechanism of the STM32F1 series microcontroller. Before we start, let’s review some knowledge related to EXTI and NVIC: External Interrupt/Event Controller (EXTI) For interconnect products (series 105, 107), the external interrupt/event controller consists of 20 edge detectors … Read more
1 Introduction Direct Memory Access (DMA) is a component used by the CPU to “move” (copy) data from one address space to another without CPU intervention during the data copying process. The CPU is notified once the data copying is complete. As a result, using DMA can free up CPU resources when copying large amounts … Read more
1. Reset (1) What is Microcontroller Reset The reset of the STM32 microcontroller refers to the process of resetting the microcontroller to its initial startup state. The reset behavior causes all running programs to terminate and restores the microcontroller’s registers and functions to their initial values. The reset process provides a known starting state for … Read more
STM32: Released by STMicroelectronics on June 11, 2007, it is a 32-bit microcontroller. GD32: Released by GigaDevice in 2013, it closely imitates STM32 in chip development, configuration, and naming. In fact, the GPIO pins are pin-to-pin compatible with STM32, meaning you can use GD32 without altering the PCB. Sometimes, you can run STM32 source code … Read more
Introduction to STM32 GPIO GPIO stands for General Purpose Input/Output ports, which are pins that can be controlled by the STM32. GPIO pins connect to external hardware devices, enabling communication with external devices, controlling external hardware, or collecting data from external hardware. Taking the STM32F103ZET6 chip as an example, this chip has a total of … Read more