FIR Filter on Mali 400
Hi everyone. We are trying to use mali 400 GP2 for real time audio processing. Audio data is signed short(16 bit). We implemented FIR filter, but it work very slow for real time processing. We have...
View Article超好用的Atmel开发板免费领啦
各位ARM中文社区的用户： 大家好， 我是版主Ben。今天首先要告诉大家一个极好的消息，我们社区又有免费开发板可以送给大家了。此次我们得到了ARM的好伙伴Atmel 的慷慨支持，我们可以免费为大家提供一款基于Atmel SAM D21 MCU的嵌入式开发板。 开发板视图 首先，请允许我给大家介绍一下这块开发板的主要情况。 这款MCU开发板，主要基于Atmel 的SAM D21 系列ARM®...
View ArticleIn Cortex-R4 pipeline: memory accesses are split across two pipeline stages,...
In Cortex-R4 pipeline: memory accesses are split across two pipeline stages, to allow longer RAM accesses times without loss of bandwidth. I want ask what's the mean by this statement? And the other...
View ArticleThe madman strikes again - ADD/SUB SP
Is there something special in the instructions ADD (SP plus register, ARM) and SUB (SP minus register)? I didn't find anything different from the basic ADD (register) and SUB (register) except the...
View Article传ARM拟8500万美元收购以色列移动安全公司Sansa
消息人士透露，芯片设计商ARM Holdings（以下简称“ARM”）正在洽购专注于移动和电脑芯片安全业务的以色列安全公司Sansa Security（以下简称“Sansa”）。消息人士称，ARM和Sansa之间这一交易可能会在几个月内完成，预计收购价格在7500万美元至 8500万美元。针对这一消息，双方公司均拒绝置评。
View Article[Partner新闻]瑞芯微发布全球最低功耗WiFi， IoT功耗节省85%近蓝牙4.0 LE标准
今日得到ARM合作伙伴Rockchip的重要信息，在2015年6月2日台北COMPUTEX电子展，瑞芯微电子Rockchip宣布与第三方推出全球最低功耗WiFi—RKi6000，该技术使WiFi功耗与BT4.0 LE(Low Energy)蓝牙低功耗相当，使用时功耗仅为20mA毫安，比现有IoT设备的平均WiFi功耗降低85%。这一标杆性功耗数据，或将成为全球智能硬件WiFi功耗的新标准。...
View ArticleRockchip Launches the Lowest Power WiFi for IoT, Reducing Power Consumption...
June 2, 2015, COMPUTEX Taipei, Rockchip announced that it launches the world lowest power WiFi technology RKi6000 jointly developed with a 3rd party. This technology makes the power consumption of WiFi...
View ArticleARM+Synopsys at DAC: lots to see... and eat
I'm looking forward to seeing many of you at DAC this year--this will be my 31st! Yeah, that means you, Lori Kate Smith,John Heinlein, Simon Segars, Ron Moore, Alban Rampon, David Blaza, and yes, you,...
View ArticleSTM32 SPI Inter Device Comms Issue
Hello everyone, could u please help me with a problem about the SPI of stm32.I took two stm32 chips to communicate with each other using its hardware SPI. The program of master chip and slave chip are...
View Article全球最低功耗WiFi发布 IoT功耗节省85%近蓝牙4.0 LE标准
2015年6月2日台北COMPUTEX电子展，瑞芯微电子Rockchip宣布与第三方推出全球最低功耗WiFi—RKi6000，该技术使WiFi功耗与BT4.0 LE(Low Energy)蓝牙低功耗相当，使用时功耗仅为20mA毫安，比现有IoT设备的平均WiFi功耗降低85%。这一标杆性功耗数据，或将成为全球智能硬件WiFi功耗的新标准。 RKi6000可使WiFi功耗接近蓝牙BT4.0
View ArticleOracle and the Community Celebrate 20 Years of Java
Hello The blog below was written by Sharat Chander, Director of Oracle Java Marketing. It is impressive that any piece of software can be relevant after 20 years - Java is not only alive but is...
View ArticleARM协助合作伙伴降低物联网芯片设计周期风险
基于ARM® Cortex®-M处理器与TSMC 55 ULP工艺技术的物联网子系统 助力创新者加快开发速度 ARM推出全新的硬件子系统，帮助客户快速、有效地开发用于智能联网设备的高度定制化芯片。这套专为ARM Cortex-M处理器开发的ARM物联网子系统（IoT subsystem）在针对与ARM最具能效的处理器、射频技术、物理IP 以及ARM mbed™物联网平台的配置使用，进行了优化。...
View Articlemy_printf compiling for aarch64, armclang vs gcc
I compiled same sample c file, but got very different asmbler code. The c file is: void my_print(char *fmt, ...){ *((volatile int *) 0x1000) =(int) &fmt; } void test(void){ my_print("a", 1,...
View ArticleMali Graphics Debugger and GL_EXT_debug_marker
Hi, I'm using GL_EXT_debug_marker with a Mali-T760 running with the Mali Graphics Debugger. I can see my calls to glPushGroupMarkerEXT, but the string passed to glPushGroupMarkerEXT only shows up as...
View ArticleLocating the teaching materials for Internet of Things (IoT) using Nordic boards
I signed up to the ARM university program and requested for samples of Course/Lab Material for Teaching Embedded Systems/MCUs - ARM. I was then directed to sign up to ARM Community here but could not...
View Articlemali T768 上運行opencv ocl face detect example 問題
Hi, 我把opencv OpenCL face detect example 運行在ARM mali T768 後，有以下error message : OpenCL Error Message (Haar face detection): OpenCV Error: Gpu API call (CL_INVALID_EVENT_WAIT_LIST) in void
View ArticleARM 将在深圳Maker Faire创客大会上举办免费mbed workshop
【工作坊主题】 奇思妙想DIY，mbed助力创客梦想 【活动信息】 人数：40人/第一场，20人/第二、三场 适合年龄：了解开发板基本常识，喜欢动手利用开发板设计各种奇思妙想的应用 设备需求：携带笔记本或平板电脑 时间： 1) 2015年6月19日13:30 – 15:30 2) 2015年6月20日14:30 – 16:30 3) 2015年6月21日14:00 – 16:00
View ArticleSTM32启动代码启动相关的讨论
有些问题疑惑了很久，过来问下amanda_s，也希望大家都能够讨论、相互学习下。 STM32F4在MDK-ARM中的启动代码是这样的： 定义了READWRITE属性的栈区；定义了READWRITE属性的堆区；定义了READWRITE属性的异常向量表；定义了READONLY属性的异常向量处理函数，和一个堆栈的初始化汇编代码。...
View ArticleThis wearable turnkey system combines MCUs, connectivity, touch and sensor...
Did you know that 45.7 million wearable devices are expected to ship this year, up 133.4% from the 19.6 million units shipped in 2014? And by 2019, reports are calling for shipment volumes to reach...
View Article请问core_cm3.c文件对于stm32f103来说是不是多余的？
我是一名stm32初学者。购买了一个开发板并附带了视频教学。在新建一个stm32工程中，视频里要求将一系列的文件添加到工程并选择好path。其中有一个叫core_cm3.c的文件，我有一次忘记添加了，但编译居然没有出错而且程序能运行。后来我又试了一下把core_cm3.c删除了，但keil依旧没有报错。stm32说明书里讲到core_cm3.c这个文件对stm32是很重要的，那我想知道问什么不添加c...
View Article