[FreeRTOS for ARM7]: asm macro reference problem

Started by non_...@diremo.mai in comp.arch.embedded14 years ago 7 replies

Hi, I'm experimenting an odd problem with a FreeRTOS asm/C mixed macro as my code grows bigger: I'm using an ATMEL EB40A ev. board and GCC...

Hi, I'm experimenting an odd problem with a FreeRTOS asm/C mixed macro as my code grows bigger: I'm using an ATMEL EB40A ev. board and GCC 4.02 WinARM dev. environment, and my application runs fairly good. The problem is that now my code is large (.text is about 0x12000 bytes long) and some macros (like portSAVE_CONTEXT() and restore()) macros stopped working: the compiler stops repo...


Data to fill into unused program space on ARM7.

Started by DanishGuy in comp.arch.embedded11 years ago 20 replies

Greetings. I'm trying to find some genious data to fill into the unused FLASH space in my project, so that a stray program counter would get...

Greetings. I'm trying to find some genious data to fill into the unused FLASH space in my project, so that a stray program counter would get caught and my system would reset. I'm thinking one of multiple solutions: :o) Loop to current position and get caught by the watchdog :o) Jump to reset vector :o) An illegal opcode, that will generate an interrupt :o) A software interrupt inst...


problem in thumb mode

Started by AnandPavaskar in comp.arch.embedded14 years ago 1 reply

Hi, I are facing performance related issues in my ARM project, I am using th ATMEL AT94M55800 ARM7 chip, I planned to go for the thumb mode...

Hi, I are facing performance related issues in my ARM project, I am using th ATMEL AT94M55800 ARM7 chip, I planned to go for the thumb mode but it GCC (3.3.2) dose not seem to compile properly in thumb mode. I have tried with -mthumb -mthumb-interwork option as some code need to b in arm mode. Do you guys know how to do this. Secondly dose gcc have any linker option that can load an ...


Instructions for installing Gnu Arm with Eclipse IDE

Started by Anonymous in comp.arch.embedded13 years ago

For those of you interested in the ARM7 Microcontroller you can find instructions for installing the open source GCC, Gnu ARM, Eclipse...

For those of you interested in the ARM7 Microcontroller you can find instructions for installing the open source GCC, Gnu ARM, Eclipse IDE development environment at: http://www.uchobby.com/Projects/InstallingARM7DevTools.htm David ----------------------------------------- uC Hobby - Microcontrollers for Hobbyist www.uCHobby.com info@uchobby.com ----------------------------------...


How to Interface Touch Screen with Microcontroller

Started by Nirav in comp.arch.embedded12 years ago 3 replies

Hi., I have Lampex LG322402 Touch Screen with SED 1335 controller, I want to interface this Touch Screen with Any Microcontroller... Can...

Hi., I have Lampex LG322402 Touch Screen with SED 1335 controller, I want to interface this Touch Screen with Any Microcontroller... Can anybody suggest me How to interface this Touch Screen?? And Which micro controller is best suited? Is there any need for ARM7 core controller or i can interface with simple 8-bit microcontrollers aslo????


LPC2292 Burst ROM Details

Started by Gary Pace in comp.arch.embedded12 years ago

Howdy : I have a Philips LPC2292 ARM7 and am connecting it to a Spansion Mirrorbit FLASH device with fast page mode. I was wondering if the...

Howdy : I have a Philips LPC2292 ARM7 and am connecting it to a Spansion Mirrorbit FLASH device with fast page mode. I was wondering if the page mode capability of the FLASH was in any way compatible with the BurstROM mode of the EBC in the ARM I can find no details about the BurstROM mode anywhere. What constitutes a burst ? Is it similar to page access in the FLASH (i.e. the bottom N ...


Minimal hardware requirement for uClinux

Started by Anonymous in comp.arch.embedded14 years ago 2 replies

Hi, I plan to make a router application using a Coldfire, a Blackfin or an ARM7 running uCLinux. I can not find any information on the...

Hi, I plan to make a router application using a Coldfire, a Blackfin or an ARM7 running uCLinux. I can not find any information on the minimal Flash/Ram required to run uCLinux. My application will take about 256 kbytes Flash and 32ko RAM. Does anyone have experience on running uClinux on small configuration ? Will I have any problem if my hardware has 2Mbytes Flash and 256kbytes of RAM ?...


I will to learn from u and Iwish to impress my girl friend with 3 of her pics ...

Started by LOVE_ME_TENDER in comp.arch.embedded15 years ago 31 replies

I will to learn from u and Iwish to impress my girl friend with 3 of her pics ... greeting, I will to learn from u and I wish to impress...

I will to learn from u and Iwish to impress my girl friend with 3 of her pics ... greeting, I will to learn from u and I wish to impress my girl friend with 3 of her pics ...rotating in color LCD at ARM7 board like Leon. because I have been thinking of her since I met her. can u help me with some circuit diagram and programming?


Querry code density About ARM7 (Newbie)

Started by Anonymous in comp.arch.embedded14 years ago 13 replies

Dear All I am reading ARM7TDMI processor. Those who are familiar with ARM7TDMI processor are aware of the "Thumb" instruction set. The...

Dear All I am reading ARM7TDMI processor. Those who are familiar with ARM7TDMI processor are aware of the "Thumb" instruction set. The native ARM instruction set is 32 bit, but the latest generation such as ARM7TDMI has a mode bit which you can flip to execute a 16-bit subset of the instruction set. Both instruction sets operate on 32-bit data, but it's claimed that the Thumb ins...


New free Programmer for many controllers! (OpenOCD ARM7/9, AVRISP mk2 Klon, usbserial)!

Started by sauterbe in comp.arch.embedded12 years ago 2 replies

Hello, This year I started a new project which I called usbprog, because I was fed up to the back teeth with buying another programming...

Hello, This year I started a new project which I called usbprog, because I was fed up to the back teeth with buying another programming adapter. http://www.embedded-projects.net/index.php?page_id=165 usbprog is a free programming adapter. You can easily install different firmware versions from an "online pool" over USB. In my little firmware-pool I have already: - AVRISP mk2 Clon...


[ANN] Atmel DIOPSiS ARM+DSP Design Contest 2005 for Universities

Started by Ulf Samuelsson in comp.arch.embedded15 years ago 4 replies

Atmel has launched the DIOPSiS DSP Design Contest 2005 http://www.atmelroma.it/contest/index.php First price is 6000Euro. Atmel will...

Atmel has launched the DIOPSiS DSP Design Contest 2005 http://www.atmelroma.it/contest/index.php First price is 6000Euro. Atmel will be happy to have Universities andd Colleges participating in the contest. By combining a floating-point VLIW digital signal processor core with an ARM7 microcontroller on the same chip, Atmel Corp. adds a new wrinkle in an already intensely com...


STR75x and TFT display

Started by djordj in comp.arch.embedded13 years ago 4 replies

I have to drive a TFT display with an ARM7 ST MCU (STR750 family). The application must show some color images (8 bit per color) on a 320x240...

I have to drive a TFT display with an ARM7 ST MCU (STR750 family). The application must show some color images (8 bit per color) on a 320x240 QVGA. The choosen MCU has up to 256KB internal flash and 16KB internal RAM. I plan to add one external serial flash (ST serial flash connected to the MCU's SMI interface) and maybe an external RAM (always ST product). The TFT is a 12 bit-depth co...


How implement alfa channel

Started by Anonymous in comp.arch.embedded10 years ago 5 replies

I want to implement a 32 bit bitmap with alfa channel in an arm7 micro....the function...

I want to implement a 32 bit bitmap with alfa channel in an arm7 micro....the function is new_pixel=alfa*pixel_foreground+(1-alfa)*pixel_background alfa is an 8 bit value from zero to one (from zero to 255). This function can be done in this way: 1)float cast of alfa and pixel_foreground 2)alfa1=alfa/255 3)new_value1=alfa1*pixel_foreground 3)new_pixel=new_value1+new_value2 3)int cast af n...


Anwenderprogramm für Flash ins eb40a mit Tantino (Hitex)

Started by Anonymous in comp.arch.embedded14 years ago 2 replies

Hallo, ich unternehme gerade die ersten Schritte mit dem ARM7 at91r40008. Ich benutze das Entwicklungsboard eb40a und die Entwicklungsumgebung...

Hallo, ich unternehme gerade die ersten Schritte mit dem ARM7 at91r40008. Ich benutze das Entwicklungsboard eb40a und die Entwicklungsumgebung von Hitex, Debugging mit Tantino. Bevor man ein Beispielprogramm =FCber die JTAG-Schnittstelle (Tantino) auf den Controller laden kann muss man die Sektoren den Flashs l=F6schen, in denen das auf dem Controller standardm=E4=DFig installierte Prog...