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4.9 (HC-SR04) ultrasonic ranging module 4.9.1 physical drawing of ultrasonic module There is no ultrasonic ranging module on the experimental board, which is used in the form of external module. Figure 4-9-1 Figure 4-9-2 Function introduction of GPIO port of ultrasonic module: (1) VCC supplies 5V power (2) . GND is the ground wire ( ...

        Delay program is essential in the development of single chip microcomputer system. For example, we often use the length of the buzzer to represent the system post results, and the length of the buzzer is inseparable from the delay program. The delay program is divided into software delay and hardware delay. Hardware ...

1, Experimental principle The whole process of interrupt is divided into interrupt occurrence → interrupt processing → interrupt return. Interrupt occurrence: when the CPU is processing an event A, another event B occurs and requests the CPU to handle it quickly.Interrupt processing: when the CPU receives the request, it pauses t ...

Preparatory knowledge When the MCU of ARM Cortex series is reset and powered on, it will obtain the vector table from the memory address of 0x00000000. The user software can also modify the storage address of the vector table by writing to the VTOR register. This value is equivalent to flash_ The offset of the base address, so that the program ...

1) Experimental platform: new starting point V2 development board of punctual atom 2) Platform purchase address: https://detail.tmall.com/item.htm?id=609758951113 2) Full set of experimental source code + manual + video download address: http://www.openedv.com/thread-300792-1-1.html 3) Students interested in punctual atomic FPGA can add group d ...

1, Interrupt introduction Specific introduction and reference articles: [STM32] lighting of interrupt switch based on STM32F407 2, Interrupt mode to realize serial communication 1. New construction Create an STM2CubeMX project for STM32F407: 2. Project setting Setting RCC Set the high-speed external clock HSE and select the external ...

One hardware         DHT11 temperature and humidity sensor has accuracy of ± 5%RH and temperature of ± 2 ℃, as shown in the figure below [1]         The wiring of the four pins is clear at a glance. No. 2 data is used for the communication between the sensor and the microcontroller. It ...

1, USART serial communication program of STM32 1.USART introduction 1. Baidu Encyclopedia: Universal synchronous / asynchronous serial receiver / transmitterUSART is a full duplex universal synchronous / asynchronous serial transceiver module. The interface is a highly flexible serial communication device. 2. Main features Full dupl ...

Go one by one   The map of the game is lattice, so it is obvious that we need to write such a function:   /* First parameter aim_direction is the direction of trolley movement The second parameter is aim_line_number is the number of squares the car needs to move Example code: I_Will_Always_Love_You(1,3); The trolley moves forward thr ...

1. Introduction to USART Universal Synchronous Asynchronous Receiver and Transmitter is a serial communication device that provides flexibility for full duplex data exchange with external devices. Unlike USART, there is also a UART(Universal Asynchronous Receiver and Transmitter), which cuts out the synchronous communication function on ...