Re: Using CMSIS DSP Function: arm_fir_f32 - Correct Use?
Hi Grog, I work for Paul at DSP Concepts on the CMSIS library. Would you mind emailing me a small demo program that illustrates your issue? I looked at the code you posted, but there seems to be some...
View ArticleHow to shutdown 2nd core (Cortex-A9)? Purpose is to save power
Hi How to shutdown 2nd core in dual core Cortex-A9?The purpose is to save power.
View ArticleRe: Using CMSIS DSP Function: arm_fir_f32 - Correct Use?
Hi Dan: Thank you for taking the time to answer my questions. Being relatively new to working with DSP, I am probably misunderstanding a fundamental here with CMSIS functionality, or perhaps just DSP.I...
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Please explain to Grandma: What’s the SAM D20 Xplained Dev Board?
For those of you who enjoyed James Langbridge blog on How I explained the IoT to my parents from Christmas, then be sure to check out his latest Please explain to Grandma: What’s the SAM D20 Xplained...
View ArticleCortex-A8 : instruction fetch for dual-issue
Hi, We experiment the following loop code (runs 4096 iterations) and we get CPI=0.66 (in other words, loop initiation interval (II) is about 6 machine cycles). We are trying really hard to reason why...
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Re: DS-5 streamline analysis of kernel process for app.
Selecting a process in the Heat Map area will filter most of the charts to show only that process' activity (the charts highlighted in blue are those that are filtered). Double-clicking on an...
View ArticleRe: Where do I find libraries and sample code ?
Hi Jens - We have a driver library package on our FRDM-KE04Z webpage. This package includes the sample code and library for the Kinetis KE04 MCU family. The direct link is:Freescale Freedom Development...
View ArticleCortex-A5 'TLB Data Read operation registers' and virtual address calculation.
I have a system running with MMU enabled in both the secure and normal worlds. I am using the TLB Data Read operation registers with the Data Registers to read out the TLB values. Some of the...
View ArticleARMv8 hypervisor switching between two OS
Hello, I need to run two OS, Linux with 64-bit and RTOS with 32-bit, in the Cortex A53 which is armv8 architecture. It is not clear to me while reading the ARMv8 reference manual as how can we use EL2...
View ArticleRe: Enable Floating Point Unit on Cortex-M4
The ARM Cortex-M4 does not have an VFPv4 -- it has an optional FPv4. Try selecting "FPv4" from the "FPU" drop-down box in the Target configuration.
View ArticleRe: 请问，发生Synchronous External Abort可能是什么原因导致？
确定是data abort哈，代码没有对flash的数据，指令操作么。检查下mpu和堆栈的设置。应该是 cpu 对axi的访问引起的。
View Articlearmv8 - error enabling Stage 2 translations for EL1/0 address space
Hi all,I am trying to enable Stage 2 translations for EL1&0 inside EL2. I have an ARMv8 board (64-bit). We are running EL2 in Aarch32, so I'll be using Aarch32 terminology henceforth (PL1, PL2,...
View Article可以使用Streamline的Android设备
hello， 大家好。 我是一位手游开发者，我正在面向ios和android开发游戏。一开始，我发现android跟ios比，缺乏强力的gpu debug/profile工具。后来我看了arm streamline的介绍，觉得很强大。但是我发现要获得一台能够streamline ready的设备还是挺困难的，要修改内核、还要构建kernel...
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Re: Cortem-M3 disabling branch forwarding or speculative branching
Thanks for information Chris. Code is simple string copy routine which internally calls memset. Branch is not conditional. Code is of the sort of following:----------------------------------------mov...
View ArticleRe: ARM: 743626—An imprecise external abort, received while the processor...
Hi Chris, Could you please help me how to configure the MMU settings to protect from external aborts.I'm unable to figure out the configurations settings/registers to be used using the MCR instruction...
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Re: ARM communicaiton with UART
Hi Julie, The best way to learn about UART/USART on STM32L1 is to download theSTM32L1 Standard Peripherals Library. Inside are examples for each peripheral (including USART) that are ready to run in...
View ArticleAfter boot from ROM, I need to execute code in another memory. How can I do...
Hi, I'm a biginner with ARM. In my Cortex-M0 design I have a boot ROM and another memory. After boot from ROM,I need to execute code in another memory. How can I do it in the boot code for ROM, which...
View ArticleIs it possible to use 10 " TFT ?
Hi friends,Is it possible to use 10 " TFT without using horizontal front porch, back porch value and pulse width value?
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