Programmer Think

1, SPI   1. Introduction SPI (Serial Peripheral Interface) is a synchronous serial data transmission standard proposed by Motorola Company. It is a high-speed, full duplex and synchronous communication bus, which is widely used in many devices. 2.SPI interface SPI interface is often called 4-wire serial bus, which works in master / slave m ...

4.6 EEPROM memory chip (AT24C02) 4.6.1 introduction to schematic diagram Figure 4-6-1 Figure 4-6-2 The EEPROM model on the experimental board is AT24C02N, and the communication interface is IIC, which is connected to P2.1(SCL) and P2.2(SDA) ports of single chip microcomputer. AT24C02 is a 2kbit (256 byte) EEPROM. The schematic diagr ...

Semaphores can be used for resource management and task synchronization. Semaphores in FreeRTOS are divided into binary semaphores, computational semaphores, mutually exclusive semaphores and recursive mutually exclusive semaphores. 0x01 binary semaphore Binary semaphore is actually a queue with only one queue item. This special queue is eith ...

1, SPI introduction SPI is the abbreviation of English Serial Peripheral interface. As the name suggests, it is the Serial Peripheral interface. It was first defined by Motorola on its MC68HCXX series processors. SPI interface is mainly used between EEPROM, FLASH, real-time clock, AD converter, digital signal processor and digital signal d ...

4.5 DS18B20 temperature sensor 4.5.1 introduction to schematic diagram Figure 4-5-1   Figure 4-5-2 The DS18B20 module on the experimental board is connected to P3.5 of MCU   On the IO port, when inserting the DS18B20 chip, the arc is inserted upward. See the above picture for the specific effect. 4.5.2 introduction to DS18B20 ...

1. Chat preparation      1. Turn off your computer's firewall      2. Turn off unnecessary virtual networks and other unnecessary Ethernet, leaving only a network chat channel      3. Connect two computers to the same mobile hotspot and open the crazy chat program 2 chat a ...

1. UCOSIII semaphore 1.1 introduction to semaphore: The semaphore is like a locking mechanism. The code can continue to execute only after obtaining the corresponding key. Once the key is obtained, it means that the task has the permission to enter the locked part of the code. Once executed to the locked code segment, the task waits until the ...

1, Chinese character coding rules 1) Location code It is stipulated in the national standard GD2312-80 that all national standard Chinese characters and symbols are allocated in a square matrix with 94 rows and 94 columns. Each row of the square matrix is called an "area", numbered from 01 to 94, and each column is called a &quo ...

1. Use environment of watchdog In the industrial working environment, the equipment often faces some harsh environments, such as ultra-high temperature and ultra-low temperature strong electromagnetic interference. These environments will affect the normal operation of the equipment, cause the equipment to crash, and the programs running i ...

Development board: Wildfire domineering V1 Chip: stm32f103ZET6 ADC: 1 CHANNEL: 11 GPIO: PC1 To create a new project 1. Open STM32CubeMx software 2. Select chip model: stm32f103ZETx 3. Configure project properties 4. Confirm clock source 5. Configure system clock 6. Open channel 11 of ADC1 7. Configuration structure typedef struct { ...