Introduction In serial communication applications, we often use receive and transmit interrupts, which most of you are familiar with. There is a very useful interrupt that may be overlooked, which is the bus IDLE interrupt. When a frame of data transmission ends, the bus will maintain a high level state, at which point the MCU’s … Read more
How to Understand Clock Phase (CPHA) and Clock Polarity (CPOL) in SPI Programming? I2C Operation Notes – Taking AT24C04 as an Example Still Don’t Understand Serial Communication? This Article Will Help You Understand
Introduction In serial communication, we often use receive and transmit interrupts, which everyone is familiar with. There is another very useful interrupt that may be overlooked, namely the bus idle state IDLE interrupt. When a frame of data transmission ends, the bus remains high idle, which triggers the MCU’s IDLE interrupt. In this article, we … Read more
Click Tech Training Top, delivering to you daily at 7:30 AM What are RS232, RS485, UART, serial ports, COM ports, USB ports, and TTL? Do you understand their relationships? First, we need to distinguish between timing standards and logic level standards. Timing standards refer to the logical values (0 and 1) corresponding to actual voltage … Read more
Click the card above to follow for more information 1. Why Do We Prefer Serial Communication? When working on microcontroller products, the most commonly used method is serial communication. For any microcontroller peripherals, those with serial port functionality are prioritized, such as Bluetooth modules, WIFI modules, 4G modules, electric meters, and displays. Why do we … Read more
I am Lao Wen, an embedded engineer who loves learning. Follow me to become even better together! Compiled by | strongerHuang WeChat Official Account | strongerHuang UART, SPI, I2C and other serial communications are very common methods in embedded development. The underlying communication principles are not difficult, but many beginners struggle to learn them. Today, … Read more
Tip:Click above“Ba Fang Hui PLC Practical Programming Training“↑Follow us for free RS485is a wired transmission, which requires a hardware transmission medium, essentially just two wires are sufficient. The actual signal transmitted over these two wires is the same signal; the sending end splits this signal into two, but at the receiving end, it is restored … Read more
BFH Click the blue text to follow us↑↑↑↑ The RS-485 interface forms a half-duplex network, typically using a two-wire system, often employing shielded twisted pair for transmission. This wiring method allows a maximum of 32 nodes to be connected on the same bus topology.Initially, data was output as analog signals for simple process quantities, later … Read more
This article introduces the basic concepts of the serial communication protocols RS-232, RS-422, and RS-485, including baud rate, data bits, stop bits, parity bits, and handshaking information. 1. What is Serial Port? The concept of serial communication is quite simple. Serial ports send and receive bytes one bit at a time. Although it is slower … Read more
(1) Introduction RS-485 is a balanced transmission standard for serial communication approved by the Electronic Industries Alliance in the United States in 1983. It only specifies the electrical characteristics of drivers and receivers without defining a protocol; therefore, many higher-level interface standards refer to RS-485 at the physical layer, such as Modbus, Profibus, etc. (2) … Read more