“I like technologies that are not easily replaceable, technologies that can still be used in the future, 20 years from now, that are simple and reasonable.” This simple technical declaration marks the starting point of Zheng Junjie’s journey into the open-source world and defines the direction of his subsequent explorations. Zheng Junjie’s Linux journey began … Read more
Experimental Hybrid Deployment of Heterogeneous Multicore OS on Milk-V DuoS Background The CPU of DuoS adopts a multicore design, allowing for the hybrid deployment of multiple operating systems, with the big cores running a Linux system and the small cores running a real-time system, currently FreeRTOS. The V2 version image (whether for RISC-V cores or … Read more
[SemiDrive Technology June News] In June, SemiDrive Technology celebrates its 7th anniversary. On this special day, the founder of SemiDrive, Qiu Yujing, wrote a heartfelt message titled “Grateful for the Journey, Committed to Our Mission”: “The seven-year journey is the result of the dedication and perseverance of every SemiDrive employee, which has forged the vibrant … Read more
#RenesasMicrocontroller #IntervalTimer #WatchTimer The Interval Timer is known in Chinese as 间隔定时器, and its core function is to generate periodic events (usually interrupts) after precise, configurable time intervals. It is the cornerstone for implementing time references, periodic task scheduling, precise delays, timeout detection, and other functions in embedded systems. The Interval Timer of Renesas microcontrollers … Read more
Renesas Electronics Shifts Focus to AI, Halts SiC Business Japanese semiconductor giant Renesas Electronics has recently announced a major strategic adjustment. According to reports from Nikkei News and Nikkan Kogyo Shimbun, the company will terminate its mass production plans for silicon carbide (SiC) power semiconductors and fully transition to three core areas: edge AI, AIoT, … Read more
In recent years, Renesas has made significant efforts in the MCU sector, continuously launching new MCUs.In fact, I have previously shared many articles about Renesas MCUs, including the newly launched MCU, such as: the ultra-low power microcontroller RA4L1. Additionally, I have shared an article: The Rise of Renesas MCUs in Recent Years.Recently, I discovered that … Read more
1 Introduction to RA2L2 Product Features 110-nm low power process 48MHz Arm®Cortex®-M23 core Up to 128KB flash, 16KB SRAM, 4KB data flash 32pin to 64pin, LQFP, QFN packages Diverse interfaces such as USBFS, I3C, SSI, LPUART, and CAN 16-bit & 32-bit GPT, 32-bit LPAGT, RTC Operating temperature range: Ta=-40°C~125°C Wide operating voltage range: 1.6V-5.5V Security … Read more
Over the past decade, Japanese electronics companies have undergone significant restructuring, divesting low-profit or loss-making businesses, particularly in traditional home appliances, which have largely been sold off. The semiconductor sector has also been a key focus of this restructuring. According to recent reports, the long-established Japanese electronics company Panasonic will exit the semiconductor industry, selling … Read more
When performing network ADB debugging on the RK3399 Android 7.1.2, if multiple computers connect to the same Android device, the first connected computer can operate normally, while subsequent connections see the device status as OFFLINE. After analyzing the ADBD related code, it was found that there was no distinction made for ACCEPT Client handling, so … Read more
On RK3399 Android 8.1, we implement the silent installation feature for APKs. Below is our testing process:1. Generate the system signing KEY in the RK3399 Android 8.1 source directory: Navigate to the build/target/product/security directory: cd build/target/product/security Create a build_system_jks2.sh file with the following content: #!/bin/bash echo "Generating system signing file…" openssl pkcs8 -inform DER -nocrypt … Read more