Hi,
I read example projects of Tiva-C 1294. There are many similar uses ' GPIOPinWrite(GPIO_PORTH_BASE, GPIO_PIN_2, GPIO_PIN_2);'
The prototype is :
extern void GPIOPinWrite(uint32_t ui32Port, uint8_t ui8Pins, uint8_t ui8Val)…
Hi,
I read example projects of Tiva-C 1294. There are many similar uses ' GPIOPinWrite(GPIO_PORTH_BASE, GPIO_PIN_2, GPIO_PIN_2);'
The prototype is :
extern void GPIOPinWrite(uint32_t ui32Port, uint8_t ui8Pins, uint8_t ui8Val)…
Hi,
I'm currently an probetion for an electronics system development company and they gave me LPC1788 and Topway LMT057DCDFWU-NBA to work with. I don`t have mentor or any kind of help. I don`t have any example.
I'm also very new to programming therefore…
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…
Yes, my ARM cortex M3 is crashing, whats new?
Well, after 3 weeks of debug I am no closer to an answer, so I hope you will not mind if I list what I have tried and see if anybody has a flash of inspiration?
The setup:
Bare bones LPC1788 ARM Cortex…
I'm (again) facing a very strange problem in my project for ARM Cortex-M4 (STM32F301K8). The project requires some of the functions to be executed from RAM (it's actually a bootloader with encryption and option to self-update, but that doesn't matter…
Hello experts,
The Cortex-M7 Lecture is opened on APS (ARM Partner Success) Site.
Also, #4 and #5 are described the details of Cortex-M7 pipeline.
However, I cannot understand the following parts of the lecture.
Could anyone teach me them more clearly in…
The document
on page 8 says the least significant bit of the PC is used to distinguish between secure and non-secure state …
We are using ARM CM0+ in our embedded SoC design and I noticed that boot takes a long time. Specifically, I saw that it took ~18K cycles after the unreset before we executed an instruction that I recognize (which is inside __rt_entry). We are of course…
I am a beginner in using ARM LPC2148 MCU for project purpose. I searched for details about tutorials, example set, registers details of MCU but could not find much.
Please let me know site that would be useful for me to avail the datasheet, examples and…
Dear Guys,
In typical SoC product, the FLASH memory is initially empty after being shipped from factory, in which the data are all "0xFFFF_FFFF".
I am curious how Cortex-M0 deals with the undefined instruction data "0xFFFF_FFFF…
Hi,
We are interested in minimizing startup time from deep sleep mode.
Some of the older ARM cores implement a dormant mode whereby the CPU core context (state) is written to RAM prior powering it down, and then then restored after the CPU core is powered…
Hi everyone,
So I have a question.
I have a ARM-M4 and for what I can tell this has both ARM and Thumb assembly. Meaning sometimes it interprets a 32 bit instruction as 2 16bit ones, some of the times.
How does that work? How does it know how to go about…
Hi,
Please help me understand expected behavior of CM4 when CM4 is in debug mode and WFI is executed through single step.
Does CM4 enter sleep/sleepdeep in such case ?
Thanks,
Sandeep
The first entry of the vector-table is the initial value for the stack-pointer.
I'm asking me, will the stack-pointer be changed when VTOR was set?
Thanks for any help! :-)
Hi,
i am working on XMC4500. i want to Implement Self Flashing i.e., the Controller Flash itself, Till now the code is Running from Flash. To Achive this one approach is if i Execute code from RAM Then flash Remains Free So that i Could Download the…
When a interrupt occurs, ARM documentation(http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/3682.html) says interrupt is disabled till the very end of handlers. When the ARM documentation says that the processor automatically disables…
Where are the Technical Reference manuals located?
The processor has 64 registers (256 bytes) in the RTC power domain
I am using these registers to store temporary data which then gets committed to flash at the end of a transaction.
I can read / write data ok but am getting some odd reads at times.
The Datasheet…
I am working on one of TI's SOC using ARM M-4 processor. I was wondering if the ARM processors have any Power Good signal which can be used in software stack to control flow of application.
Or storing some data before power goes out completely.
I have only used assembler when working with MCU's. I can follow a C program but have not used it in any commercial product. Can anyone suggest a development platform to start off learning the ARM and C? I would probably work on a Cortex M4F as a start…
Dear all,
I am an engineer who is doing signal processing on xilinx FPGAs. I am familiar with C/VHDL/MATLAB. However I want to learn ARM based micro-processors. I know very little about processors and their architecture. Absolutely no practical experience…
I am trying to evaluate ways to protect my embedded code from being read and copy from outside world.
I wonder what are the popular ways used out there.
Pls note that you still need the option to upgrade the firmware later on.
Dear All,
I am new to Arm Processors, I don't know how to start Arm Programming and Application development, can anybody help me? I have working experience on DSP Processor, and Microcontroller, which is the best low cost Arm Processor for personal…
I have initialized stacks for various tasks with content as expected on SVC interrupts. I'm not able to dispatch an initial task via the "normal" dispatch function. On this first dispatch, the processor is not in an exception handler, but the LR is…
In the ARM Cortex M4, If the PSP stack pointer is configured, what address space does it point to? Is it the same address space as the MSP (main stack pointer)? Or do we create a new and separate stack for it? And how do we configure the TOP of stack…