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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30 views

STM32L1 USART interrupt problem

I am trying to use stm32l152 discovery kit to communicate by using usart. Although I can send data on tx (I check this via pc), I couldn't get in interrupt function when data come (I send via pc and ...
0
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1answer
52 views

Connecting ARM cortex m4 to the internet [on hold]

So I would like to connect my arm cortex M4 Microcontroller from TI to the internet through the home network. The purpose is so that i can remotely control something, lets just say an LED. Where ...
1
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1answer
51 views

Does the LPC1343 MCU need an external clock for USB operation?

I am trying to design a board using the LPC1343: http://www.nxp.com/documents/data_sheet/LPC1311_13_42_43.pdf I would like to be able to use its on-board USB bootloader to program it. My question is ...
4
votes
3answers
172 views

Calculating time spent by a function in Microcontroller Applications

I would like to write a simple profiler for my STM32F100VE microcontroller. I have seen that I can include time.h and based on the c standard functions I can use it, but I was confused about ...
0
votes
3answers
92 views

Lossless FFT on audio data

I have an application where I'll be receiving an audio stream, much like using headphones, into my processor. I would like to run FFT and various DSP algorithms on the sampled audio and then spit the ...
1
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0answers
62 views

Float calculations hangs on Kinetis K20 (arm-m4-no-fpu) when PWM interrupt is on

I will use this ARM to control Induction Motor with three-phase inverter. When the program encounters any float operations, like simple plus operation, the system hangs but the pause of debug works ...
0
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1answer
29 views

Startup sequence for lpc1343

I'm exploring my first arm device the lpc1343, I'm using VIM and ARM GCC, I have managed to light an LED but to blink it, I will need to startup the clock and pll, right now I can't find the right ...
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3answers
148 views

Microcontroller programming: do I need vendor's IDE?

I am very interested in the following ARM Cortex-M0 microcontroller: http://www.nxp.com/products/microcontrollers/cortex_m0_m0/lpc1100/LPC11U24FBD48.html#overview However I'm turned off at the ...
1
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1answer
54 views

How to use an interrupt on Cortex - M3

I am trying to set up the chip so it will detect a rising edge on a pin then start outputting a square wave on the next pin over after that. I have the interrupt turned on but I don't know how to say ...
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1answer
72 views

What's the basic difference between ARM, AVR and 8051 microcontroller? [closed]

I've been trying to do a project using Arduino, I need your help to know the basic differences between these. Thank you
0
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1answer
43 views

Writting Joystick drivers for ARM Cortex [closed]

I need to write a driver for Xbox360 joystick controller, using its module and everything. The idea isn't just take the code, I'm really interesting in the theory behind it. Does anyone have any ...
4
votes
3answers
399 views

Is there any difference between the assembly instructions of ARM MCUs from two different corporations?

I'm curious to know, are there any differences between the assembly instructions of ARM MCUs from two different corporation? For example between an Cortex-M3/4 of NXP and TI or ST or other ...
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2answers
81 views

Using FFmpeg or other libraries on an ARM SoC without OS layer?

I would like to use FFmpeg on an ARM SoC to perform some decoding. Now, as I understand conventionally everybody uses it within an OS environment. However, I was wondering whether it is possible to ...
0
votes
1answer
84 views

CAN communication with the SM470R1B1M-HT microcontroller

I bought the IAR Kickstarter kit to work with the SM470R1B1M-HT (Texas Instruments) microcontroller. I would like to implement CAN communication between the microcontroller and a PC. I need to send ...
2
votes
1answer
51 views

More info about J-link v8

I have a J-link v8 and want to use it, but I can't find its name in Segger homepage, I want to know what ARM core it support and is it support BeagleBone or RPi.
0
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1answer
99 views

How to understand initialization and stack checking of ARM assembly language [closed]

I am trying to understand How bad a 'void main(void)' is from the following link: tech notes. But I have difficulties in understanding two assembly languages examples, the first one is shown below: ...
1
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1answer
68 views

How to daisy chain SWD Debug port

I have multiple mcu's that are configured to communicate with bus topology. I have 10 pins (4 of them is occupied by now) I need to debug (update firmware online, etc) all of these mcu's. I read this ...
1
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1answer
147 views

Minimal ARM circuit is not working

I have developed an application by using STM32F4-Discovery development kit. Now code is mature and I need to build a custom circuit. In order to test that the bare circuit (according to my ...
0
votes
1answer
50 views

ARM microcontrollers for robotics [closed]

I have been working on ARM9 microcontroller LPC3141 until recently, but I am wondering if there are any better and newer ARM microcontrollers more suitable for robotics. ADD: Are there any general ...
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votes
2answers
83 views

Programming with ARM without microcontroller context [closed]

I want to make an application that will use ARM CPU. Am I bound to using microcontrollers? The thing is the microcontrollers that have ARM as a base are really big in physical size. Can I create a ...
0
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1answer
84 views

STM32F3Discovery & LSM303DLHC magnetic field data not updating

I'm having trouble reading the 6 magnetic field data registers from the LSM303DLHC on my STM32F3Discovery board. (OUT_X_H_M, OUT_X_L_M, etc) I used the STM32F3Discovery demo as an example for how to ...
0
votes
1answer
69 views

UART Modulation Using STM32

I'm trying to generate a modulated UART signal from the standard Tx coming out of my microcontroller. What I'm trying to accomplish is to have a 100us wide pulse generated on every edge ...
0
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3answers
181 views

How fast can ARM Cortex M0s/M3s bit bang?

I have not yet used ARM Cortex uCs, only AVRs Firstly, how fast can they: a) stream 1024+ bits (serially, from bytes in RAM) out of a pin, with no pauses/jitter b) stream 1024+ bytes (parallel, ...
3
votes
1answer
106 views

Can Tiva C run code from SRAM?

All I know is that although Cortex-M3/4 micros are Harvard architecture, they can run code from RAM, at least some implementations can (like STM32F4). Can Tiva C series microcontrollers execute from ...
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0answers
65 views

EMblocks IDE upload to flash

I can only load code to the chip by launching debug for ARM STM32F4 Discovery board and STLink. Is there no way within the IDE to upload hex or .elf file to device without launching the debugger?
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1answer
49 views

Does SAM4S have FPU onboard?

While trying to use Atmel's ASF library, they say __FPU_PRESENT: Initialize macro __FPU_PRESENT = 1 when building on FPU supported Targets. Enable this macro for M4bf and M4lf libraries ...
1
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1answer
146 views

ARM9 vs ARM11 performance? [closed]

This may be a loaded question, but is there a general understanding of the performance increase per clock between ARM9 and ARM11? Say, for a math-heavy function (FFT)? Thanks!
0
votes
1answer
104 views

Choosing the right controller family: AVR? DSP? ARM? [closed]

I'm a developer of the "brain" part of the switch-mode power-supplies. Now I'm on AVRs, but I'd like to develop my self to more advanced processors. Switch-mode power supplies are the devices with ...
3
votes
1answer
128 views

Should I define default register values in start up code?

It has come to my attention that some ARM programmers set some CPU registers with values that are the same default values of the register on microcontroller reset. For example: the default value of ...
2
votes
1answer
79 views

How to do a DIY LCD output from a busted android tablet?

I have a cheap android tablet with a busted screen. Replacement screens cost more than a new tablet and I hate to waste it since it's only a few weeks old. I took it apart and it runs on a Allwinner ...
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votes
1answer
105 views

What retail outlets exist for the Allwinner A20 [closed]

Does anyone know if it is possible to purchase an Allwinner A20 SoC and if so, where? I just can't find any of it. I have tried a couple of common suppliers, a major online auction outlet, searching ...
1
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0answers
68 views

Good (modern) sources on ARM Cortex hardware design [closed]

I am looking for some good resources on getting started in embedded hardware design with the ARM Cortex series. I'm primarily interested in the Cortex-M, Cortex-A, and Cortex-A50 series of chips. ...
0
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0answers
125 views

ARM SWDIO only works when touching 3V and SWCLK with fingers

I made a new STM32F2 prototype board and SWDIO debugging only works when I connect the Vinputref and SWCLK with my fingers. It was working fine on previous boards: it's the same circuit but different ...
1
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1answer
116 views

Cortex M3 clock configuration

I've just started working with the Stellaris LM3S9B92 (Cortex M3). I have some problems understanding the SysCtlClockSet() function. On the Driverlib page 350 they ...
2
votes
1answer
97 views

Reducing chip count for an ARM embedded system

It seems like a lot of devices use an ARM SoC + a RAM chip + a flash storage chip. In applications that are very space-constrained, such as ChromeCast dongles, micro drones, or wristbands, it would be ...
3
votes
2answers
62 views

Task switching on Cortext-M3 crashes after IRQ

I've used an exokernel model for my ARM OS. When a task wants to read from a UART it calls a library function, which, if there's no data, makes a SVC call to block the task (which causes the kernel to ...
3
votes
2answers
123 views

Why can't I find SOCs with integrated memory?

I am looking for SOCs with integrated memory to avoid having to worry about design of a memory bus for, what is supposed to be, a pretty low power application. I'm looking for something like the ...
0
votes
1answer
69 views

RAM and MMU requirement in ARM 11

ARM 11 is based on Powerful ARMv6 instruction set architecture. But I am not able to figure out if it has; 1-MMU 2-Sufficient RAM for porting Linux Can someone enlighten me?
1
vote
1answer
106 views

What is the ARM 32 bit MCU with the fastest ADC? [closed]

I have been trying to find and answer, but it is remarkably tedious and difficult trawling through manufacturers data sheets. The best so far is 12 bit at 2MSPS
2
votes
2answers
269 views

The GCC Ride7 STM32 startup script does not jump into SystemInit function

We are a robotics association from ENSEIRB-MATMECA (Bordeaux, France). We are developping some boards and a template project for STM32 devices. One of our boards embed a STM32F103C4 microcontroller. ...
1
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1answer
108 views

Olimex ARM-USB-OCD-H with LPC-P1114 and LPC-P1227 boards questions

I'm having a big headache with ARM-USB-OCD-H with LPC-P1114 and LPC-P1227 Olimex boards. After reading the Manual IAR I figured out that I need to configure my OpenOCD Server to use the ARM-USB-OCD-H ...
1
vote
1answer
235 views

ARM Development [closed]

I an new to using micro controllers .Recently, I have seen the ARM being talked about. How different is ARM -Cortex development than normal Arduinos? I have used a PSOC recently, which does use an ...
0
votes
0answers
48 views

Power conusmption equation paramaters for modern ARM processors

I have been looking through the ARM Cortex (A, R and M series) eElectrical and technical datahseets (those from ST and TI) to find the power consumption parameteres for such uP. I want to know P_idle ...
0
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0answers
42 views

What is the alternate for Data Watchpoint and Trace Unit (DWT) in ARM Cortex A9 ?

I understand there is no Data Watchpoint and Trace Unit in an ARM Cortex A9 processor. So what is the substitute in A9? My intention of using it is to know how many cycles a specific function is ...
1
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1answer
363 views

Connect Marsboard with Touch Panel and access GPIO pins

I am thinking about using a MarsBoard A10 and LCD Touch Panel for low volume commercial product but I have to confirm some capabilities first. Firstly, what would it entail to get the Marsboard A10 ...
1
vote
2answers
385 views

ARM microcontroller, where to begin [closed]

I had previously worked on Arduino but I think it was very simplified for the users. Now, I want to learn properly. I decided to begin learning ARM microcontroller. So, I bought LPC1114 DIP because I ...
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1answer
200 views

Use the same pin as digital output and analog input with an ARM (sam3x / Arduino Due)

I have an application where I need to use one pin as a digital output and analog input. I switch between input and output at a "high" frequency (>1 kHz) and it takes to much time to disable and enable ...
3
votes
1answer
133 views

How to add memory to an ARM Cortex Microcontroller

I am looking into a design that would use the ARM Cortex M4F core but am just the software engineer for the project. The EE tells me that there will be an 64 MByte sdram memory module connected to the ...
1
vote
2answers
118 views

What book or website should i refer for stm32f0 development from scratch (Ihave worked on AVR microcontrollers ) [closed]

What book or website should I refer to for STM32F0 development from scratch (I have worked on AVR microcontrollers)? I am searching on net for good resources but unable to do either they are very ...
1
vote
1answer
494 views

DIY AVR JTAG programmer using AVR

I have an AVR Dragon and several AVR MCUs. I recently purchased a BeagleBone Black (Cortex-A8). I'm trying to write my own bootloader. However, this would require a programmer. Can I use an AVR MCU ...