Problem: I used a USB to TTL board to program the STC89C52RC microcontroller. I connected the board’s RX to the microcontroller’s TX (P3.1), the board’s TX to the microcontroller’s RX (P3.0), and GND to GND. After making the connections, I couldn’t download the program, and I kept receiving the prompt “Please power on the MCU.” … Read more
Introduction In industrial control sites, there exists a fundamental yet easily overlooked aspect that all devices rely on—serial ports. So, what is a serial port? Is there a risk associated with serial communication? Qi’an Technology’s classroom provides answers and details how to conduct safe offense and defense regarding serial ports. What is a Serial Port … Read more
This article is a featured post from the KSY Forum by author ID: fengzhidian 1. Introduction The author has recently researched several smart home devices, which have fewer open ports and are generally unable to obtain debugging permissions from the network side. Gaining local debugging permissions on the device has become an important step in … Read more
Although the ESP8266 programs and related products have matured significantly, some beginners still don’t know how to learn. For example, how to use an ESP8266 along with an STM32 microcontroller to create a small product? What is the learning path like? How should we get started? In this regard, I suggest: 1. First, study the … Read more
Search on WeChat Technical Training Preparation: Hardware: Huichuan AM401 PLC, one USB to RS485 converter. Software: InoProShop (V1.6.2), Serial Assistant, Modbus-RUT slave simulator. Serial Debugging Process: 1. Program the PLC. 2. Use the Serial Assistant to check if the characters sent by the PLC are correct. 3. Connect the actual device for PLC-device debugging. (You … Read more
This section discusses practical application configurations, which are not the configurations mentioned earlier in the config.txt for the /boot partition, such as display and GPU settings. Since this is called getting started, the focus is mainly on practical configurations. 1. Serial Debugging Connection to Raspberry Pi The wire used is a USB to TTL cable … Read more
Click the blue text / Follow us As we all know, our new version of the debugging tool from Bafanghui2022 has been released! I believe that electrical engineers will use it when encountering difficulties at work. Today, I will detail the serial port debugging function of our new version of the debugging tool. First, open … Read more
Search on WeChat Technical Training 1. Description of Case Task Control Requirements The Serial Port Debugging Assistant is a software based on the Windows system: 1. Supports TCP, UDP, and Serial Port 2. Supports domain name resolution for addresses 3. Allows creating multiple connections of the same type 4. Periodic sending, hexadecimal display, automatic line … Read more
If our board only has 4 interfaces: V3.3, SWDIO, SWDCLK, GND. Then the connection relationship with JTAG is shown in the figure below: Pay attention to the direction of the notch. Then GND can be connected to any pin on the left (except for the bottom pin). The 20-core to 4-core wire should be short; … Read more
Brushless Motor Speed Measurement and Speed Control Introduction to Brushless Motor The speed feedback closed-loop control system of a brushless motor is a basic feedback control system characterized by three fundamental features, which are the basic rules of feedback control. All basic feedback control systems, without additional regulators, adhere to this rule. 1. The controlled … Read more