Programmer Think

1, RT thread 1. Introduction RT thread nano is a minimalist version of hard real-time kernel. It is developed by C language, adopts object-oriented programming thinking, and has a good code style. It is a tailorable, preemptive real-time multitasking RTOS. Its memory resources are very small, and its functions include relatively complete ...

STM32 - Interrupt Priority Management NVIC 1.NVIC interrupt priority grouping The full name of NVIC is Nested vectoredinterrupt controller, which is a nested vector interrupt controller. Searching the vector table in the STM32F Chinese Reference Manual will find the corresponding break instructions.The CM4/CM7 kernel supports 256 interrupt ...

1, Introduction Universal synchronous asynchronous transceiver (USART) provides a flexible method for full duplex data exchange with external devices using the industry standard NRZ asynchronous serial data format. USART uses fractional baud rate generator to provide a wide range of baud rate options. It supports synchronous unidirectional comm ...

summary There are two communication modes between CPU and peripherals: rotation training and interrupt; The so-called rotation training is to actively ask about a certain status to see if it is a certain value, and if so, take action; Once an interrupt occurs, it will actively notify the CPU; This chapter will study how to respond to key press ...

Design requirements Use DMA to move data from memory A to memory B 1, Basic knowledge DMA (Direct Memory Access) Direct Memory Access can greatly reduce the workload of CPU. The CPU executes instructions according to the content of the code. Among these instructions, there are instructions for calculation, control program and data tr ...

preface Clock system is an essential part of MCU. This paper will discuss the following problems: What is a clock?How to understand the STM32 clock structure?Why does MCU have multiple clock sources?How does STM32 configure the clock? catalogue 1, Clock introduction 2, STM32 clock tree 2.1 STM32F10X clock source 2.2 system clock 3, ...

U8g2 software i2c porting to stm32 Using stm32f407, the software i2c drives the oled screen Screen is 128 * 64, 0.96 inch monochrome oled screen, driver chip ssd1306 Development environment: VSCODE+EIDE Development language: C/C + + mixed programming Step 1: prepare data U8g2 source code https://github.com/olikraus/u8g2 download Down ...

1, Basic storage unit bit: A digit in a binary number, which can be 0 or 1. It is the smallest unit of data in a computer. Byte s: The basic unit of data in a computer. Every 8 bits form a byte. All kinds of information need at least one byte to be stored and processed in the computer. For example, an ASCII code is represented by one byt ...

Bisher - acoustooptic electronic organ based on single chip microcomputer Note: this resource can be obtained in WeChat official account: Kevin learning station. 1, Work display 1.1. Physical drawing of works 1.2 welding layout 1.3 PCB schematic diagram 1.4 PCB diagram 2, Design process 2.1 basic design idea of the syst ...

1. Preface FATFS tutorials and processes are common, and its platforms cover from 8051 core MCU to Cortex-M7 core high-performance MCU and even higher performance application processors. However, most STM32 tutorials and routines bypass this mode using D-Cache writeback mode and DMA. For example, the processes of punctual atoms and wildfire ...