In this article, I will give an introduction of TEE (trusted execution environment) and ARM TrustZone based on my one and a half year experimentation on several ARM platforms when implementing T6.
[导读] 爱特梅尔(Atmel)推出全新 Atmel SAM D20,是以 ARM Cortex-M0+ 处理器核心为基础的新系列嵌入式快闪微控制器中的首款产品系列,锁定家庭自动化、消费、智慧型计量和工业应用。爱特梅尔(Atmel)推出全新 Atmel SAM D20,是以 ARM Cortex-M0+ 处理器核心为基础的新系列嵌入式快闪微控制器中的首款产品系列,锁定家庭自动化、消费、智慧型计量和工业应用…
[导读] A15和A9同样具备乱序执行,但是Cortex-A15具备(两倍)的指令发射端口和执行资源,指令解码能力也要高出50%,动态分支预测能力更强(采用了多层级分支表缓存),指令拾取带宽更强(128 bit vs 64 bit),这些都能让A15的流水线执行具备更高的效率。今年的新手机趋势无异是全面向四核靠拢,不过同样是四核,在实际的性能上其实是千差万别。例如针对入门级主流市场的四核手机普遍采用的都是Cortex…
Fast Fourier Transformation (FFT) is a powerful tool in signal and image processing. One very valuable optimization technique for this type of algorithm is vectorization. This article discusses the motivation…
This year at GDC Khronos announced the latest version of the OpenGL® ES API. OpenGL ES 3.1 is taking a step up from OpenGL ES 3.0 to enable new, fascinating mobile graphics content. With headline features…
[导读] ARM Cortex-A 移动应用处理器产品线横跨了几代产品和三个主要产品类别。简介 ARM Cortex-A 移动应用处理器产品线横跨了几代产品和三个主要产品类别。有些开发人员和 SoC 设计人员经历了一款或多款新型 ARM 处理器的推出过程,他们知道该产品线如何从单个高性能通用 CPU 设计演进成为三个不同产品线,分别面向高端、中端、入门级的移动设备 SoC 市场,这让他们受益匪浅…
There was so much I wanted to share about my one day at Maker Faire that I needed to write two blogs. My first thoughts are in My First Maker Faire: Engineers and Kids at Play.Massimo launching the Arduino…
空间光通信是以光波作为载波,在空间中进行信息无线传输的一种新型通信技术,其具有保密性高,抗干扰性强,通信速率高等优点,将会在卫星与卫星、卫星与地面控制站的无线通信领域发挥重要的作用,具有广阔的应用前景。但是由于光波波束窄,空间环境又比较复杂,而给通信链路的建立造成了极大的困难,所以对于空间光通信,必须先使用一套捕获、瞄准与跟踪(Acquisition,Pointing and Tracking,APT…
In this blog I look at system design patterns useful in the construction of IoT architecture solutions, with a focus on common patterns for interoperability.
Freescale's booth at Maker Faire featured a large 4320 LED video panel, controlled by a single Teensy 3.1 board powered by Freescale's Kinetis K20 MCU.