The RS232 type DB9 interface, which used to be found on older computers, can be connected to modems. In MCU51 microcontroller projects, this UART interface is generally used, with serial port rates of 115200bps, 57600bps, etc. Later, USB to serial converters like PL2302 and FT232 emerged, with rates reaching up to 921600bps, which is considered … Read more
This article describes the main debugging methods for the Nordic nRF5 SDK to help everyone quickly locate and solve problems. Generally, you can debug your code using various methods such as logging, IDE debug mode, the app_error_check function provided by the SDK, and command line methods. 1. Debugging via Logging The nRF5 SDK supports two … Read more
The ZDS2022 oscilloscope technical exchange conference is still in full swing. Recently, a customer communicated with our FAE, stating that he wanted to stably trigger the first bit of the UART data frame. He sequentially set “edge trigger” and “rising edge trigger” and then performed a single trigger in Simple mode. After multiple tests, the … Read more
Many engineers who started learning with the 51 microcontroller might feel a bit confused by this question. How can a parallel interface, which can send a large amount of parallel data, be slower than a serial interface? The 51 microcontroller also has a parallel port, which is used for driving LCD screens and connecting external … Read more
Your device connects to another device, and if it can automatically recognize the baud rate without knowing the baud rate of the other device, wouldn’t that be convenient? 1 Overview Regarding the issue of automatically recognizing UART serial port baud rates, I believe those with project experience or who have seriously studied serial ports should … Read more
During the process of vulnerability exploitation for smart devices, firmware extraction is the first step in analysis and the first step towards success. In previous analyses, the firmware was stored in TSOP8 package NOR flash, which could be extracted directly using a chip clip or by soldering the flash chip for extraction, followed by using … Read more
Frame The UART communication standard uses an 8-bit binary number as a frame, with the least significant bit first, transmitted bit by bit. To distinguish each frame, a 0 is used as a start marker before each frame, followed by a 1 as a stop marker. Before the stop marker, an optional “parity bit” can … Read more
When we talk about serial ports, we generally refer to UART (Universal Asynchronous Receiver / Transmitter）, the Universal Asynchronous Transceiver. The serial port is one of the most commonly used serial peripherals by engineers, but various issues are often encountered in practical applications. For example: losing one byte of data. Today, we will discuss UART-related … Read more
Introduction Previously, we introduced the basic knowledge of I2C and SPI. In this chapter, we will discuss UART (Universal Asynchronous Receiver/Transmitter), which is used for communication between internal and external devices of a computer. Data transmission within a computer is parallel, while data transmission with external devices is often serial. Therefore, a chip is needed … Read more
Serial Communication My Diary 2024 Is the most basic communication method faced by electrical engineers, with RS-232 being the simplest among them. Many beginners often struggle to understand the relationship and differences between UART and RS-232, RS-422, RS-485. This article will discuss these concepts to help clarify their relationships. If we compare serial communication to … Read more