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  • M4/M0 dual core application. M0 fails to start

    Hello everyone,

    I have an LPC4337 running uCLinux. I'm trying to get code to run in the M0 in parallell.

    I load the code to 0x10080000, set the M0APPMEMMAP to 0x10080000, release the M0APP Reset and nothing happens. I have to reset the M0-core using…

  • about tail chaning of Cortex-M0

    Hello.

    I'm studying about the tail chaining of Cortex-M0.

    Is it same as Cortex-M3 or M4?

    Best regards.

  • cmsis NVIC question.

    Hello, Everybody. I have several questions.

    1. Please See the NVIC_Type structure. I don't understand about why ISER,ICER,ISPR and ICPR use size of array 1( I think It can use just __IO uint32_t ISER; ), and what does RESERVEDs do???

    2. I would like…

  • How long bitfields on which ARM?

    I need to be able to handle long bitfields as effectively as possible. Right now I need up to 64 bits in length.

    Are there instructions to set, clear and test individual bits in one cycle available for some of the architectures? Which? Particularly, will…

  • Indication to begin a program

    I need some indications to begin writing a program.

    Write a compare routine to compare 64-bits values , using only two instructions.

    Thanks for your indications !

  • Identifying Generic IP Components on an Access Port

    Hi,

    in the course of developing an SWD debugger, I try to find the necessary components on the Access Ports. Through the CIDRs and PIDRs, I can divide components in being CoreSight components or being Generic IP. My first supported targets will be nR51…

  • How to change the BMI(Boot Mode Index) with Serial Wire Debug Protocol???

    Greetings,

    sir/madam i am working on serial wire debug protocol. I was implemented serial wire debug protocol, which was successfully tested for used controllers like xmc1100,xmc4500..etc, when i tried to Access the control on newer controller i.e xmc1100…

  • Align source and assembly

    I have a source file, converted it to assembly and added 2 instructions and generated the final elf. When I load this final elf, symbols doesnt match the source due to assembly instructions addition.

    Is there a way to align them ? am using ARM cortex-M4…

  • Where to find the execution cycles of Cortex m7 instruction

    for Cortex-M0, M3 and M4, I can find the execution time in their Technical Reference Manual > Programmers Model > Instruction set summary 里面查看

    http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0432c/CHDCICDF.html

    but for M7 It said that…

  • V2M MPS2+: 'ERROR: FPGA did not configure.'

    Hi all,

    We have purchased an MPS2+ platform, and everything was going well, but since Friday we are facing an error we do not understand.

    When starting the FPGA configuration (by pressing the 'ON' button on the board), leds start blinking (the screen…

  • How much stack memory do I need for my Arm Cortex-M applications?

    Overview of stack size requirement estimations in Cortex-M based applications

    1 - Overview

    “How much stack memory do I need for this application?” - This is a common question for many software developers working on applications that run on microcontroller…

  • Whitepaper: How automotive body electronics are changing

    Body control applications can sometimes be overlooked in favour of application areas which at face value are seeing a greater rate of change, such as advanced driver assistance, safety and electrified powertrains. However, the sheer volume of body domain…

    • ARM Moves Further Into Automotive with NXPs Launch of S32K Series.pdf

  • Question about the Pipeline, clock cycle and machine cycle in Cortex-M Series.

    Recently I'm learning the implement of ARM cortex m core in order to optimize my software to be more efficient and be easier to predict its execute time. But now I'm confused about the clock cycle, machine cycle and the pipeline of cortex-m.

    …

  • Loop unrolling on Cortex-M3 vs. Cortex-M0

    In the DSP lib files like arm_conv_f32, arm_fir_f32, the algorithm implementation in Cortex-M3/M4 and in Cortex-M0 is different. i.e., loop unrolling is used in M3/M4 and it is not used in M0.

    Pls tell me the reason behind it. Is there any advantage of…

  • 恩智浦（NXP）的LPC系列MCU新亮点

    昨天阿Ben抽了半天时间去参加了在上海的NXP MCU（微控制器，单片机） RoadShow，地点在火车站边上的浦西洲际酒店。请让我给大家分享一下看到LPC系列MCU新亮点。

    20140528_124151.jpg

    昨天的Roadshow吸引了120名左右的在上海的工程师和相关行业内人员参加，我到的早，占据了一个中间前排的位置。

    大家知道，NXP 以及其前身飞利浦是老牌的MCU供应商，据他们昨天参会的战略市场VP Lam女士介绍已经有39年的MCU业务历史，更重要是，他们24年前就开始使用ARM的相关架构进行MCU的研发和生产。他们的LPC系列MCU产品在国内一直享有很好的口碑…

  • Cortex-M Prototyping System, new development board from ARM

    Hi I'm very excited to announce of the release of a new product we have been working on for the last few months called the Cortex-M Prototyping System, as part of the Versatile Express family of products. This development board is targeted at the evaluation…

  • From “Which Cortex-M processor” to “Which C compiler”

    In my presentation at ARM TechCon 2013 last week "ARM Cortex-M for Beginners", someone asked a question of “Is there any advice for getting the best performance? Which C compiler to use?

    This is a very interesting question. One page of…

  • ARM Technical Tutorial Video - Cortex-M Series

    I saw what looks like the start of a series of short videos on the ARMflix YouTube channel.

    Of course, it doesn't go into much details, but I thought it was a simple way to discover the series.

    As they come up, anyone please feel free to edit this…