ARM9 boot up

Started by Roman Mashak in comp.arch.embedded14 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.embedded14 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.embedded18 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.embedded16 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.embedded16 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.embedded12 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.embedded19 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.embedded16 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.embedded17 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.embedded17 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.embedded19 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.embedded16 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.embedded18 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.embedded18 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.embedded19 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.embedded18 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.embedded18 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...


8051 to ARM - code size differences?

Started by Anonymous in comp.arch.embedded18 years ago 14 replies

A move from 8051 to ARM7 (with Thumb) is being contemplated. This move would also incorporate a move from asm to C. Has anyone published metrics...

A move from 8051 to ARM7 (with Thumb) is being contemplated. This move would also incorporate a move from asm to C. Has anyone published metrics for code space increases in such a migration? I'm imagining a 40% size increase (wider instructions vs. optimize-friendly architecture) but this is basically a guess. I'd prefer a documented case study rather than simply anecdotes, but I'll take a...


"Embeddable" PLC Functionality

Started by James Dabbs in comp.arch.embedded17 years ago 4 replies

We have a hardware platform with 8 dry contact closures and 8 intput lines, among other things, controlled by an ARM7 uC running a proprietary...

We have a hardware platform with 8 dry contact closures and 8 intput lines, among other things, controlled by an ARM7 uC running a proprietary kernel. We now have an RFP to add PLC functionality to the box, to make this I/O available to the end user. We think we may be able to manage adding sequencing capability to the box, but we don't want to create user tools for building PLC prog...


Sed1335 with LPC2294

Started by bugfixer in comp.arch.embedded17 years ago 2 replies

Hello to you all. Has anybody used successfully the SED1335 device in bus mode with LPC 2294 (the ARM7 from Philips)? I'm using a Phytec...

Hello to you all. Has anybody used successfully the SED1335 device in bus mode with LPC 2294 (the ARM7 from Philips)? I'm using a Phytec development board, which uses the A2 address bus as the lowest bit for the addresses. The register BCFG3 seem to correctly set: BCFG3 --> 0x0000FBEF bit memory access, RBLE = 0, IDCY=15, WST1=31, WST2=31. I have also set PINSEL2 to 0x0E6149E4,