32-bit microcontroller IP. The ARM company which designs the ARM cores doesn't make controllers itself, but licences the IP to other manufacturers. ARM is the leading 32-bit controller and is available from tens of suppliers.

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LPC ADC Freezing on manual conversion

I'm using MDK-ARM V5.10 with an ARM Cortex-M0+ LPC1114 from NXP. I have this code below to read the ADC module: ...
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24 views

IAR ARM Workbench vs Atmel Studio?

I'm developing firmware for ARM Cortex M4. I've used Atmel Studio extensively as it is free but have never used IAR ARM Workbench. Can someone with experience on both IDEs tell me some of the ...
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56 views

Moving from Arduino to ARM - what should I be considering? [duplicate]

I have a ton of experience working with the Arduino, and I'll say I'm an intermediate in straight C++ AVR and PIC applications. I'm now working on a project on top of an Atmega1284P that is running ...
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1answer
85 views

ARM Processor or FPGA to video signal processing? [closed]

I want to design a PCB where a video camera will take images and they will be shown in a display HD. So I have several questions in order to achieve it: I would like to know what is the best option ...
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1answer
28 views

How choose MPU for image streaming and transmission

I want to ask how to choose and how much processing power are required to be able to stream video using a wifi module. I'll explain better; I have a camera sensor of 5Mpx, i want to elaborate video ...
3
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0answers
47 views

How to implement critical sections on ARM Cortex A9 for GCC, no OS? [duplicate]

I am porting some legacy code from an ARM926 core to CortexA9. This code is baremetal and does not include an OS or standard libraries, all custom. I am having a failure that appears to be related ...
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1answer
31 views

onewire emulation in Software

Is there any full software implementation of onewire protocol ? I mean : can we have a SW that is manipulating a PIO to emulate fully the onewire protocol ? (for instance : ARM-M4 running @150MHz).
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5answers
389 views

What is the place of 8- and 16-bit microcontrollers? Why hasn't 32-bit taken over?

What is the real cutoff point in terms of the trade-off between cost and performance for selecting 32-bit microcontrollers? In other words, with the rise and domination of ARM architectures, why are ...
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45 views

Hardening Raspberry Pi performance for reliable 24x7x365 use [migrated]

I am working on a project, which currently is a pet project and am using Raspberry Pi model B+ for it. But, while working this prototype a few questions have started coming up, so my question is in ...
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2answers
40 views

How to configure Coide to use DSP library for STM32f3?

I am struggling to use the DSP library provided by ST for my STM32f3 discovery board. I am using Coide. I started by including arm_math.h since all the DSP library files refer to it. I am getting ...
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1answer
50 views

Is it possible for a Teensy 3.1 microcontroller to receive USB keyboard input?

As I've read, it is possible to have the teensy act as a keyboard for a computer. I would like to know if the opposite is possible - can I collect keystrokes through the USB port on the teensy. If ...
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1answer
36 views

STM32F4xx - Can EXTI_GenerateSWInterrupt() Wake Up Processor from Stop Mode

As the title states, can the function EXTI_GenerateSWInterrupt() wake up the processor after it is put into a low-power mode using the PWR_EnterSTOPMode() function? The documentation says that an ...
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0answers
13 views

how to get SWV working with Atollic TrueSTUDIO Lite and stm32f100 Discovery

I need to get some processing info from my stm32f100. I followed the instructions included in the quickstart guide for using the SWV ...
3
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1answer
90 views

Moving to ARM from 8 bit AVR - how to take the 1st step?

I write code for AVRs for several years now and it seems like my needs are calling for a more powerful processor. Since Atmel Studio is the IDE I'm already using and my debugger also works with ARM ...
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0answers
36 views

STM32F4xx WFI unable to sleep due to SysTick Interrupt

I am trying to add some power conservation to our STM32F4xx powered device using its WFI sleep function. However, whenever I call the WFI function, the system is not being put to sleep (or rather, it ...
0
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1answer
40 views

How to attach/interface an ARM Cortex SoC with an stm32 processor

I'm trying to work out the best way to attach / interface an stm32f processor with a Linux based ARM SoC? Is it possible for the stm32 to communicate with the ARM SoC via I2C ...are there any ...
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1answer
64 views

New PowerVR Support Introduced to ARM Cortex-A Embeded Processors [closed]

I understand that ARM Cortex-A and their graphics processing is a highly problematic section in GNU/Linux world I have heard due to the fact that Open-GL is not so much developed to the extent it is ...
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0answers
61 views

NXP LPC2138 does not start up. Electronic problem?

I have a problem with LPC board and I cant figure out what is wrong. It manifests like this: I can connect board via jtag and Keil sw recognise the processor. I can program it (at least I guess that ...
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2answers
65 views

Same Priority Interrupt on ARM Cortex M0

I have two two interrupts of the same priority; each has its own interrupt service routine: ISR_A and ISR_B. When interrupt A occurs, ISR_A executes... what happens if interrupt B occurs while ISR_A ...
5
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1answer
195 views

NOP instruction after branch on ARMv7 Cortex M3

I'm interested, why for Cortex M3 microcontroller (stm32f103) compiler sometimes generates a NOP instruction after branch. And why it sometimes doesn't. For example: ...
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1answer
93 views

Value for feedback resistor in pierce crystal oscillator configuration

This question is partially an "understanding english" question and partially and "understanding the pierce oscillator configuration" question. Backstory I'm currently looking at using a Freescale ...
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1answer
67 views

Trouble holding MCLR line low for PIC ICSP, ICD3 works, hardware defect?

I have an ARM Cortex-M3 that talks to a dsPic33F. I am attempting to do ICSP programming of the attached PIC. I have an analyzer and can see that I cannot control the MCLR line the same way the ICD3 ...
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1answer
58 views

MCU Performance: running with emulator vs running without emulator

If I connect to my MCU with its SWD emulator/debugger, is there ANY difference in performance/behavior as compared to when I run the MCU without the emulator? EDIT: I am using a freescale KL25z ...
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2answers
159 views

Assembler coding for ARM (Cortex-M0 and M3): is it possible/practical?

Unfortunately there are no questions on Stack regarding ARM and assembler at all. My concern -- is time critical devices. Let's take for an example one of my AVR-based device (program compiled with ...
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1answer
63 views

Will the ADC work with resistive inputs in LPC1796

I'm working with LPC1796 and I have to do data acquisition for my project somebody told me that LPC1796 microcontroller won't work with resistive inputs. What is a resistive input? Is there any way ...
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1answer
87 views

Will ARM replace that older processor architecture? [closed]

I know that those processors with ARM architecture have their advantages, but will it replace those old kind of ones? Or they just will be dealing with different kinds of applications and continue to ...
2
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2answers
579 views

Sublime Text editor to develop ARM-based software

Until this moment I used Atmel Studio to develop software for AVR-based devices. Now I'd like to go to ARM Cortext M. Additionally I'd like to try codesign and version control (I still not experienced ...
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3answers
101 views

Do I need OS for ARM Cortex-M0(3)?

I'm a developer of control devices for switch mode power supplies which need to generate a PWM signal(s) with a frequencies about 100 kHz, measure analog signals, communicate vie USART, make ...
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1answer
150 views

Best microcontroller for industrial applications [closed]

I have an industrial project requirement to build a device having this functionality: Store Data Send Data to Web Server Device to be placed under scorching sun Sensors - around 5 A Graphical ...
0
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1answer
88 views

SD Card Access Library

I am accessing my SD card using SPI. But I've found this to be slow and I am also sad that when there is a faster protocol already supported by my SD card I am using a slower version. Is there a C ...
0
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1answer
85 views

Change display orientation on ILI9325

I've started to play with a cheap TFT display, called HY28B. It's pretty well known, I guess... Anyway, I want to change the orientation of the display to landscape mode, but somehow it doesn't do ...
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2answers
43 views

Why doesn't the MCU's pin go high on time?

I have a STM32F103 and I downloaded this program to it(a simple blink program): ...
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1answer
81 views

Code Security of ARM Cortex M4 MCU

What are the main methods the code inside a certain ARM Cortex M4 MCU (TI LM4F120H5QR etc) can be extracted after deployment? Is it possible to completely stop a third party from stealing the code ...
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2answers
78 views

Uploading C program to the ARM core for execution through ethernet!

I want to write a c code on my local PC and upload it to ARM core on Zed-board for execution. I know we can do it using JTAG, but for obvious reason I want to use Ethernet interface. I will be glad ...
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2answers
67 views

SRAM vs MicroSD

I have very little SRAM in my datalogger (10 kb), so I have to flush my buffer to MicroSD every 0.5 seconds. Would it make any difference in power usage if I added more SRAM (which is very difficult ...
0
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1answer
114 views

ARM Cores Benchmark

I am taking some deep interest lately in the ARM architecture and there are many flavors of ARM out there....ARM7, ARM9, ARM11, ARM Cortex-A, ARM Cortex-M and etc. Are there any benchmarks of all the ...
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2answers
118 views

What would be a good language interpreter to implement into a Microcontroller [closed]

For beginners it is always a problem getting started with microcontrollers. The biggest problem is getting the whole system running and then programming it with C. C is a great language but it has its ...
0
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1answer
85 views

Simple delay functions for TI Launchpad?

In Atmel Microcontrollers, there are simple delay functions such as __delay_ms() and __delay_us() found in ...
2
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2answers
327 views

STM32F103, Having trouble nesting interrupts

I'm trying to interrupt into a USART handler from inside an RTC_Alarm handler, but it doesn't work. I have set the NVIC: ...
2
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1answer
83 views

Basic idea of color look up table

I'm driving an ILI9230 LCD 320*240 16bit interface, with a framebuffer of 250*200 and I want to drive it as 4bit. so I built a loook up color table like that: ...
0
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1answer
86 views

Selecting external RAM for an ARM static memory controller

So I'm going through the datasheet for a device by Atmel (AT91SAM) and it shows the followings: This SMC is capable of handling several types of external memory and peripheral devices, such as ...
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2answers
120 views

Getting an 8-bit LCD display interface to work

I have a LCD which this controller is used with: LCD Single Chip Driver. I am trying to get it to work with an 8-bit interface, but in my kit I can't find the three pins that are mentioned in the ...
2
votes
1answer
159 views

STM32F10x SPI - No Clock

I'm trying to get basic SPI operation working on an STM32F107VC chip using the WaveShare Port107 development board. I'm trying to initialise SPI1 which resides on PA4-PA7. I'm attempting a simple ...
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votes
4answers
175 views

ARM Development tools [closed]

I want to start developing embedded applications on ARM and I am looking into the tools options and honestly it's quite confusing. I am trying to decide on which IDE and debugger I will be using and ...
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2answers
97 views

ARM cancel execution of pre-empted interrupts

I can't seem to find an answer to this in google or the Definitive guide... Is it possible to from one interrupt, cancel the return to any pre-empted interrupts? For example, I have an ISR which is ...
1
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1answer
47 views

What is the danger of using interrupt pre-emption in ARM

I am working on a system which uses about 4 interrupts. I can clearly define a priority from one to the other. For example, I feed SPI transfers with DMA requests and operate a USB interface which ...
0
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0answers
31 views

ROM functions through CMSIS on LPC15xx

I'm playing with LPC1549 uC. I'm using CMSIS library, and I'd like to ask how could I use the ROM functions through CMSIS? Maybe it is a silly question but I'm not sure about it.
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1answer
277 views

USB interface with STM32

I'm experimenting with native USB in STM32. I've not found any "step by step", or a little more well structured tutorial, how to implement CDC or mass storage for example. I've found some examples, ...
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0answers
58 views

Differences between ARM, Cortex-Mx, MCU Manufacturer, Dev Board?

I trying to find out ways to send HTTP requests from a development board (EK-TM4C1294XL) and trying to find libraries and code samples and what not (note: this is not my actual question). I want to ...
1
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1answer
109 views

STM32F102 USB Programming

I am currently designing a board for a STM32F102 chip which needs to be able to use the USB bus to transfer data while the chip is running. However I also want to be able to program the chip through ...