I recently bought TM4C123GXL evaluation kit (Texas Instruments). I found 2 microcontrollers on that board. I heard that it is something related to JTAG. But I didn't understand what it is even after browsing about it.

Hi All,

I am using UART to receive values and then write those values to SRAM. I am using the Texas Instruments Stellaris LM4F120 board.

For this purpose, I am using the memcpy() function to write the received values over UART to my SRAM base address defined…

Hello community members.

I have recently started working with SD card using Microchip ARM based uC SAM4. So far I have managed to initialize the HSMCI interface of SAM4 and SD card is also initialized and has responded with the card capacity and the RCA…

HI,

i'm an ICT professional (so also with an IT background) and very much interested in embedded development (IoT solutions). Until now I mainly did embedded development (mainly ARM m3, m4 microprocessors based development boards: eg Spark Core, TI CC3200…

How to compile in gcc 4.9.3 for CCM SRAM usage?

I don't want to setup the vector table for all my external interrupts. For instance I only need the timer4 IRQhandler at IRQn 30. How can I make an offset in the table? Is this necessary?

Sir,

I am working on Cortex-M4 over serial wire debug protocol, i am able to read IDCODE(0x2ba01477) which is correct as per arm cortex m4 technical reference manual, and i am writing 0x50000000 to CTRLSTAT register to enable CSYSPWRUPREQ and CDBGPWRREQ…

HI,currently i am working on project based on stm32f407 chip.my development work has been stopped since two days as i have stuck in hard fault handler. Please  guide me how to trace the fault ???i tried every possible way i could.but result in nothing…

Hi all,

I am looking for developing an IP camera based system based on STMicroelectronics STM32. The way it is supposed to work is:

STM32F4 will have few IP cameras connected to it. It may have a web server running so it can be accessed from outside…

Greetings,,

what happens if FAULTMASK is set in cortex-m3/m4 and one or more serious fault happened like bus fault, MPU violation, invalid instruction, stack corruption.. etc will the processor enter a lockup? if not what would be the status of the processor…

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…

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…

Now we are thinking of using cortex M4 based MCU in custom board design, can I know is there any opensource IDE/Toolchain available?

Is there any other opensource cross compilation tool chain available for  cortex M4 ?

thanks and regards,

Jeevan

Hello,

         I have been using CMSIS library for implementation of DSP functions in ARM, however, CMSIS have very limited DSP functions. Although GNU has many DSP functions which CMSIS do not, It only have floating point implementation. I am trying…

Hi

I'm using a kinetis K64 cortex M4 with FreeRTOS and I need to compress files on a SD card. I have 100-150ko free Ram.

Do you know a library for this ? I found only solutions with 1Mo minimum RAM requirement.

It's csv files. I have a lot of time available…

Hello everybody,

im using the Math.h file to do a rfft with 1024 points und q15 datatype.

So far everything works fine, and I get good results. It needs a computation time of ~720us on my CortexM4 @100Mhz.

This is very Impressive, but to long for my application…

I am looking for some alternative of J-Link Segger for Cortex-M3/4 , the cheapest one is J-Link Base as J-Link Lite can be used only with evaluation boards, 

Any suggestion ?

I am using GNU arm gcc as toolchain and debugger and Eclipse as IDE, I…