Any form of communication requires rules to ensure everyone is on the same page. In electronics, these rules take the form of standards—these are widely applicable design specifications recommended by industry associations. Following these guidelines helps engineering devices speak the same electronic language, enabling efficient and reliable communication. RS-232 (“RS” stands for “Recommended Standard”) was … Read more
The RS-485 bus is widely used in communication, industrial automation, and other fields. In practical applications, we often encounter the question of whether to add pull-up and pull-down resistors and what size of resistors is appropriate. Below, we will conduct a detailed analysis of these issues. 1. Why Are Pull-Up and Pull-Down Resistors Needed? 1. … Read more
Click on the above “Embedded Miscellaneous“, select “Pin to Top” to view programming notes at the first opportunity! Introduction to UART The STM32 chip has multiple USART peripherals for serial communication, which stands for Universal Synchronous Asynchronous Receiver and Transmitter. It can flexibly perform full-duplex data exchange with external devices. Unlike USART, it also has … Read more
I believe the cross-platform abstraction provided by ZephyrRTOS is a very important feature. Of course, the abstraction itself also brings a more complex software architecture and a steeper learning curve. Recently, I tried to use the nRF52840 to create a low-power Bluetooth + LTE + GNSS board. Initially, the distributor lent me an nRF52840 DK, … Read more
In the previous article, we ran a minimal Hello World application. The original code is simply // Copyright (c) 2024 Qingdao IotPi Information Technology Ltd., All rights Reserved #include <zephyr/kernel.h> int main(void){ printk("Hello World! %s\n", CONFIG_BOARD); return 0;} which can output “Hello World” without any hardware configuration. This also reflects the hardware abstraction capability of … Read more
Before discussing buses, we should first understand what a bus is. According to the complete definition from Baidu: A bus is a common communication line for transmitting information between various functional components of a computer. It is a transmission line composed of wires, categorized according to the type of information transmitted by the computer. In … Read more
Communication issues, just like traffic problems, can have various situations such as high-speed, low-speed, congestion, interruptions, etc. If we compare serial communication to traffic, UART can be likened to a station, while a frame of data is similar to a car. Cars on the road must obey traffic rules. In urban areas, speed limits are … Read more
Follow+Star PublicAccount, don’t miss out on exciting content Author | strongerHuang WeChat Public Account | strongerHuang The UART serial port is a common communication method in embedded development, but many people still do not know how to use the serial port. Today, I will share a few points about serial ports: Serial Port Receiving Methods … Read more
During debugging, various interfaces and conversion boards are encountered, and the feeling of not fully understanding can be quite frustrating! First, serial ports, UART ports, COM ports, and USB ports refer to physical interface forms (hardware). TTL, RS-232, and RS-485 refer to level standards (electrical signals). Serial Port: The term serial port is a general … Read more
Welcome FPGA engineers to join the official WeChat technical group ClickBlue TextFollow us at FPGA Home – the best and largest pure FPGA engineer community in China Communication issues, like traffic problems, can also have various situations such as high speed, low speed, congestion, interruption, etc. If we compare serial communication to traffic, UART can … Read more