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Introduction: for the serial port to receive some variable length data, we must face a problem: how to judge whether a frame of data reception is completed? RXNE non null interrupt is usually used in combination with simple data protocol. Frame header and frame tail are added to the data. Judge whether the frame tail is received in the program ...

outline This paper mainly records some personal opinions on learning I2C protocol, and realizes STM32 to read and write EEPROM data based on I2C protocol Statement: due to limited personal ability, this article is only personal learning notes, and I hope to point out any mistakes I2C characteristics Support device bus, that is, multiple d ...

1, Product creation 1. Functional requirements APP end functiondescribeMode selectionPreservation mode and deodorization modeDeodorization timeYou can define the deodorization working time of the equipmentDeodorization gear adjustmentStrong, medium and weak grades are supportedLow power alarmLow battery report, APP end alarm Device end funct ...

1) Experimental platform: punctual atom STM32MP157 development board 2) Purchase link: https://item.taobao.com/item.htm?&id=629270721801 3) Full set of experimental source code + manual + video download address: http://www.openedv.com/thread-318813-1-1.html 4) Official station B of punctual atom: https://space.bilibili.com/394620890 5) Punc ...

Principle of ultrasonic ranging Using sound ranging, the speed of sound in the air is 340m/s(15 ℃) When the sound propagates, it will bounce back if it encounters an obstacle. The distance from the transmitting end to the obstacle can be calculated by counting the rebound time S=v*(t/2) Ultrasonic module instruction In the single chip m ...

1) Experimental platform: punctual atom STM32MP157 development board 2) Purchase link: https://item.taobao.com/item.htm?&id=629270721801 3) Full set of experimental source code + manual + video download address: http://www.openedv.com/thread-318813-1-1.html 4) Official station B of punctual atom: https://space.bilibili.com/394620890 5) Punc ...

Catalogue of Series Articles RT-THREAD Kernel Quick Start (1) Threads RT-THREAD Kernel Quick Start (2) Timer RT-THREAD Kernel Quick Start (3) Semaphores, Mutexes, Events Preface This is the fourth in the Quick Start series, the last to last in the Programming section, followed by a Memory Management and Interrupts section, which is t ...

Mixed use of various modules (1) Measurement of temperature and humidity;             DHT11 (2) Display of temperature, humidity and other parameters;      LCD screen (3) Setting of alarm data (key);       EXIT interrupt service function (4) Temperature and humidity con ...

1. Hardware The hardware schematic diagram is as follows: The hardware schematic diagram is the hardware circuit of punctual atom stm32zet6 elite version. Different development boards should be based on the actual circuit. First of all, to make the led light up, there must be a voltage difference between the two sides of the led lamp. As can b ...

RT-Thread version: 4.0.5 MCU model: STM32F103RCT6 (ARM Cortex-M3 kernel) 1 Synchronization and Mutual Exclusion First add a few concepts: Execution Unit: Determined by the current hardware platform and the operating system it runs. For RT-Thread and STM32, the execution units are threads and interruptsCritical Zone: Multiple execut ...