Structures with variable length array known at compile time

Started by aravind in comp.arch.embedded11 years ago 4 replies

Hi, I need to develop a menu system for a project of mine. The menu will be displayed on a character LCD display driven by ARM7 Microcontroller....

Hi, I need to develop a menu system for a project of mine. The menu will be displayed on a character LCD display driven by ARM7 Microcontroller. For this purpose i wish to construct a structure in C which will contain a the following - struct menu { int n (no. of elements in menu); char menu_items[20][q]; (This will contains the strings to be displayed on the LCD, 20 characters a...


But ARM9 has a bootloader , why do it need mo !!!

Started by werty in comp.arch.embedded12 years ago 6 replies

No low cost MCU has a better boot loader ! So which Luddite Linux nerd forced U-Boot on us !!! Smells of govt pork barrel...

No low cost MCU has a better boot loader ! So which Luddite Linux nerd forced U-Boot on us !!! Smells of govt pork barrel legislation .... Linux image needs nothing, it can be loaded into RAM and run ,, but Linux Nerds forced the fs to be RO , so it could be tested and .... Say what !!?? Stay tuned for free ARM7 OpSys , totally intrgrated solution to your s...


Required memory estimation.

Started by JY Kim in comp.arch.embedded12 years ago 2 replies

I need to pre-estimate required memory of our project I have experience in device driver programming of PocketPC but I have never done things...

I need to pre-estimate required memory of our project I have experience in device driver programming of PocketPC but I have never done things like this before I am using ST STR7 32bit arm7 mcu without OS, but our final goal is using OS my company has developed. I think currently only method by which I can assume required memory is just counting byte. Then what I add to estimate required mem...


ARM9 boot up

Started by Roman Mashak in comp.arch.embedded11 years ago 18 replies

Hello, I'm in for a porting U-Boot on the ARM926EJ-S based system-on-chip. I worked before with ARM7, arm9 is my first experience --...

Hello, I'm in for a porting U-Boot on the ARM926EJ-S based system-on-chip. I worked before with ARM7, arm9 is my first experience -- therefore I'm looking for a description of boot-up process. Tried to find some on http://infocenter.arm.com but with no luck so far. Probably this is chip specific information? I've checked ARM9 realated parts in U-Boot source tree, and found hat upon ...


ARM processors and remap

Started by Mark in comp.arch.embedded10 years ago 4 replies

Hello I'm going to port bootloader U-Boot on a ARM based platform (arm926ej-s specifically), my final goal is to lauch Linux on my board. I...

Hello I'm going to port bootloader U-Boot on a ARM based platform (arm926ej-s specifically), my final goal is to lauch Linux on my board. I worked with arm7 CPU before, although this is my first experience with U-Boot. Now I'm gathering information on it. Many MCUs built on arm7tdmi core (for example, SAM7 family from Atmel) involve remapping, i.e. 0x0 address points on ROM at reset ...


JTAG emulators

Started by Andy Chan in comp.arch.embedded14 years ago 2 replies

Hi, I am trying to find a JTAG emulator for a new project which uses a ARM7 processor. I am considering several vendors, such as...

Hi, I am trying to find a JTAG emulator for a new project which uses a ARM7 processor. I am considering several vendors, such as Lauterbach (Trace32 ICD), Macraigor (Wiggler, Raven, usbDemon, mpDemon), Emutec (DebugJet), Hitex (Tantino), Embest, Nohau, EPI, SigNum, ...etc. The emulator has to support multi-core. If anyone has use the JTAG emulator from these vendors, can you pleas...


soft reset doesn't work

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

Hi, can I please have some debug tips on this problem? I'm using an ARM7 microcontroller (TI TMS470). My program seems to run bug free when...

Hi, can I please have some debug tips on this problem? I'm using an ARM7 microcontroller (TI TMS470). My program seems to run bug free when it's being loaded by the IDE to flash. When I press the reset button on the development board, it stop running. I've tried loading an example code to flash and testing it with the reset. It runs from the beginning of the program after reset. Tha...


Eclipse embedded development woes, req feedback

Started by John in comp.arch.embedded13 years ago 8 replies

Hi, If you use Eclipse (the IDE, especially for embedded use, I would really appreciate your responses. I now have Eclipse(Zylin Embedded...

Hi, If you use Eclipse (the IDE, especially for embedded use, I would really appreciate your responses. I now have Eclipse(Zylin Embedded CDT) + OpenOCD talking to my LPC2103 (ARM7-TDMI), but I'm experiencing what seems like shortcomings in Eclipse. Maybe others here who use Eclipse for embedded development can shed some light. 1. Is there an "easy" way to automate the build, co...


Programming LPC with Console DOS Commands.

Started by Mahkam in comp.arch.embedded9 years ago 1 reply

HI EmbeddedRelated members I have a subject about LPC2212 ARM7 micro-controller that i want that one could help me on it. I have a board...

HI EmbeddedRelated members I have a subject about LPC2212 ARM7 micro-controller that i want that one could help me on it. I have a board containing an LPC2212+S29AL016D-M02 Spansion Flash. I'm programming it by a LPT port wiggler interface (bought from H-Jtag), I used H-Flasher utility existant in H-Jtag 1.0 freeware obtained from H-JTAG. OS is Windows XP. After well writing the script .hf...


rtos features

Started by Sagar in comp.arch.embedded15 years ago 21 replies

hello, i am evaluating various rtos for on of our products based on arm7. i have been looking at Nucleus, embOS, Rtxc, Threadx and MicroC...

hello, i am evaluating various rtos for on of our products based on arm7. i have been looking at Nucleus, embOS, Rtxc, Threadx and MicroC os-ii. Of the lot Threadx and embOS seem to be good. Although i believe that the others are just as good. It seems hard to zero in one choice. I have been searching for reviews in the newsgroups. I have found some scattered info for nucleus and threadx (...


Prototyping surface mount microcontrollers

Started by Berk Birand in comp.arch.embedded12 years ago 4 replies

Hi, I am currently taking an embedded systems design class, where we are building a computer using an ARM7 microcontroller. The class used to...

Hi, I am currently taking an embedded systems design class, where we are building a computer using an ARM7 microcontroller. The class used to be based on the 8086 processor, which could easily be mounted on a breadboard for prototyping. After switching to the ARM, it was more difficult to do the prototyping since the AT91M42800A only comes in a 144 pin surface mount package. A special PCB ...


RF link to embedded system

Started by Marian Staw in comp.arch.embedded13 years ago 2 replies

Hello. I developing embedded system based on ARM7 core and i want to transfer lots of data(about 128 MB)from system to PC via RF link. ...

Hello. I developing embedded system based on ARM7 core and i want to transfer lots of data(about 128 MB)from system to PC via RF link. Do you know good RF module with min. 500kbps date rate and 10 m distans? I thing about RadioCraft RC2000 module and Bluegiga WT12 module. What do you think about them? Anybody use them? Marian Staw


Lowest power ARM MCU?

Started by ghazanhaider in comp.arch.embedded13 years ago 11 replies

I'm looking for the lowest power ARM7 MCU out there... one with the best mips/watt ratio. Its hard to compare the benchmarks used by various...

I'm looking for the lowest power ARM7 MCU out there... one with the best mips/watt ratio. Its hard to compare the benchmarks used by various manufacturers since they measure active Idd in various ways, but the process technology (130nm, 90nm etc) is almost never specified. I've been looking at the LPC2101 which I believe is built with a 90nm process, but Ive heard there are intel parts that...


Production programming of battery-backed SRAM

Started by Clive Wilson in comp.arch.embedded15 years ago 7 replies

Dear All, I'm not sure if what I'm about to propose is achievable, won't work, or just plain wacky. I'm attempting to design an ARM7-based...

Dear All, I'm not sure if what I'm about to propose is achievable, won't work, or just plain wacky. I'm attempting to design an ARM7-based system which has no Flash, on-chip or off. There is a requirement to have NVRAM, i.e. battery-backed. So I'm thinking, can I manage with only the NVRAM? One major concern of mine is how to initially insert the run-time code in the NVRAM in the firs...


[Q]Strange behavior in reading Compact Flash card

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

Dear all, I am having a problem when I try to read CF card. I am using an ARM7 and the CF card is in Memory Mapping mode with 16-bit data bus...

Dear all, I am having a problem when I try to read CF card. I am using an ARM7 and the CF card is in Memory Mapping mode with 16-bit data bus width. > From the CF specification 4.0, it said that to access the data register in CF card, pull down -CE1 and -CE2, and the 512 bytes can be read out consecutively. But when I tried to do this, every second read is the same as its previous read such


how to program a flash with the wiggler? (for free)

Started by Erol in comp.arch.embedded15 years ago 21 replies

I bought a wiggler probe for ARM7 and was very disappointed when I didn't receive a Flash Programmer Utility with it! Apparently they sell the...

I bought a wiggler probe for ARM7 and was very disappointed when I didn't receive a Flash Programmer Utility with it! Apparently they sell the Flash Programmer SW for 500 extra bucks! I am not eager to pay any additional dollars to this company, so I would like to know if the wiggler can be used with any other Flash Programmer software. Thanks, Erol P.S. I heard that the OCD Comman...


Learning about uCs (ARM7)

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

Hi, I am looking to start learning about ARM uc. I have chosen as a developer platform this...

Hi, I am looking to start learning about ARM uc. I have chosen as a developer platform this board. http://embedinfo.com/English/Product/ax4510.asp The board has a flash loader software on CD and also a bootloader (w/o any Monitor, the bootloader is simple). The board has a 20 pin JTAG connector. Also, I would be using gnu tools. 1. Please suggest any JTAG ICE that is cheap and supp...


eCos and ucOS memory footprint

Started by Ozone Hole near South Pole in comp.arch.embedded15 years ago 3 replies

Hi, I am thinking about putting either eCos or ucOS into the just released Philips ARM7 LPC21xx chip. It has something like 16kB of RAM,...

Hi, I am thinking about putting either eCos or ucOS into the just released Philips ARM7 LPC21xx chip. It has something like 16kB of RAM, 128kB (or 256kB depending on the part) of FLASH on-chip, with no external memory bus. Before going ahead, I would like to have a sanity check: can the porting of eCos or ucOS be done with the resources? It aims to be my hobby project. Just want to try...


ARM development board

Started by Bartlomiej Swiercz in comp.arch.embedded14 years ago 5 replies

Hello, I'm looking for ARM development boards for students laboratory. The board should be based on ARM7 or ARM9 core and has features:...

Hello, I'm looking for ARM development boards for students laboratory. The board should be based on ARM7 or ARM9 core and has features: simple keyboards (4x4 or similar), LCD display, ADC, EIA232. It should be working with GNU GDB debugger. Can someone recommend me a board which may be useful for students laboratory? Of course, it should not be expensive. Best regards, -- Bartlomiej ...


ARM7/LPC21xx debugging capabilities

Started by Oliver Betz in comp.arch.embedded15 years ago 4 replies

Hello All, reading some of the specs I'm still not completely sure about the debugging capabilities of a LPC21xx. Can I access memory "non...

Hello All, reading some of the specs I'm still not completely sure about the debugging capabilities of a LPC21xx. Can I access memory "non intrusive" while the program is executing (like BDM in the 68HC(S)12 or the HCS08?)? Or does a memory read always interrupt program execution for some cycles? If "non intrusive" is possible: is this a standard feature of debuggers? Any genera...