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Program design of temperature value display of DS18B20 I Characteristics of DS1820 single line digital thermometer • unique single line interface requires only one port pin for communication • simple multipoint distribution applications • no external components required • power supply via data line • zero standby powe ...

STM32 learning from scratch @EnzoReventon SPI read / write FLASH Related links: Introduction to SPI physical layer and FLASH chip SPI protocol layer SPI features and architecture reference material: [wildfire EmbedFire] practical guide for STM32 Library Development -- Based on wildfire Decepticon development board [punctual atom] STM32F4 Dev ...

1, Mapping from linux physical address to virtual address linux cannot directly operate the physical address. If you need to operate the hardware, you need to convert the physical address into a virtual address first. Because linux enables MMU, you cannot directly operate the physical address. 1. What are the benefits of enabling MMU? (1) Make ...

preface The previous learning is divided into several modular knowledge points. The learned knowledge needs to be combined for practice, and the comprehensive and flexible application ability of the learned MCU knowledge is more investigated. (the writing is relatively basic. If there is any error, please correct it) task requirement LE ...

01 overview NB-IoT NB IOT (Narrow Band Internet of Things) is a narrowband Internet of things technology based on cell, which supports low-power devices to connect cellular data in low-power wide area Internet of things (LPWAN). LWM2M protocol The full name of LwM2M is lightweight machine to machine. It is a lightweight protocol formulate ...

More exchanges, welcome tiktok, 81849645041 objective Understand internal memory and external memory, and realize the dynamic management of memory. principle Memory management refers to the technology of allocating and using computer memory resources when software is running. Its main purpose is how to allocate efficiently and quickly, and ...

More exchanges, welcome tiktok, 81849645041 objective Familiar with the working principle of SD card and SDIO. Master the reading and writing of SD card. principle Most single chip microcomputer systems need large capacity storage devices to store data. At present, U disk, FLASH chip, SD card and so on are commonly used. They have their own ...

  Catalog 1. Set up GPIO: 2. printf redirection 3. Log information format 4. Personalized Output 5. CubeMX+HAL Open Serial Interrupt 6. Open external interrupt 7. Clock Tree Basic Operations 8. Universal timer configuration 9. CubeMX Configuration Timer (1) Set the timer clock to 72M (2) Select internal clock (3) Configure timer ( ...

LCD with 8080 timing There are four control lines of 8080: RD write enable, WR read enable, DC data / command and CS chip selection 8080 bus has many interfaces: 8 / 9 / 16 / 18 bit interface 8080 general timing Read timing LCD_CS = 0; //Film selection LCD_DC = 1; //Read data LCD_WR = 1; //No writing LCD_RD = 0; //Start readin ...

More exchanges, welcome tiktok, 81849645041 target The slave device EEPROM can read and write data. principle EEPROM is a memory that does not lose data after power failure. It is often used to store some configuration information for loading when the system is powered on again. The most commonly used communication mode of EEPROM chip is I2 ...