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floating point calculations.

Started by knightslancer in comp.arch.embedded15 years ago 45 replies

Hi Friends, I have tried a lot about this. I donno if my mind is not good at this. I am trying to do an arithmetic calculations that involve...

Hi Friends, I have tried a lot about this. I donno if my mind is not good at this. I am trying to do an arithmetic calculations that involve multiplying a 32 bit integer with a floating point numbers. For example: 200 * 5.25. How can I write an assembly code for this on ARM7 LPC2292 boards. Please help me out with this. I am a started in assembly language programming. Thanks knight...


Embedded SQL implementations

Started by Raddix in comp.arch.embedded13 years ago 3 replies

Is there an SQL implementation that works well on lower end embedded projects? ARM7/Cortex type devices are primary what I am looking at. These...

Is there an SQL implementation that works well on lower end embedded projects? ARM7/Cortex type devices are primary what I am looking at. These chips can barely run a version of uCLinux, so SQLite isn't exactly an options. Was curious what, if any options are available for something like this. I am guessing most implementations will require too much memory to be of use here. ...


Philips LPC210x cheap & quick start?

Started by Tilmann Reh in comp.arch.embedded20 years ago 17 replies

Hello, we are looking for development tools (IDE and simple In-Circuit Debugger) for the Philips LPC210x (ARM7) controller...

Hello, we are looking for development tools (IDE and simple In-Circuit Debugger) for the Philips LPC210x (ARM7) controller family, particularly at the lower priced end. At the Philips homepage, several systems are listed (mainly from the greater vendors like Keil, Nohau, IAR, Ashling etc.). Can someone recommend a good package to look at? Maybe there are some more makers of "smaller" de...


LPC2103 reset when disabling interrupt in VIC

Started by Jon in comp.arch.embedded16 years ago 4 replies

Hi, I'm using: - NXP LPC2103FBD48 with ARM7 core. - Rowley Associates CrossStudio for ARM v1.7 build 4. Sometimes, when I disable the...

Hi, I'm using: - NXP LPC2103FBD48 with ARM7 core. - Rowley Associates CrossStudio for ARM v1.7 build 4. Sometimes, when I disable the interrupt corresponding to TIMER0, doing VICIntEnClr =1 <


EMI: which controller is 'immune'

Started by Herbert Demmel in comp.arch.embedded18 years ago 6 replies

Hello everbody, I used ST6 microcontrollers in some projects without any problems regarding ElectroMagnetic Inference. ST6 family was...

Hello everbody, I used ST6 microcontrollers in some projects without any problems regarding ElectroMagnetic Inference. ST6 family was designed to operate properly in bad environment (like car) Now I have to switch to another micro (ST7, AVRmega, PIC, ARM7) My customer told me of problems (hanging software, reset, latch-up or similar) in an application with some electrostatic dischar...


Help.....DSP on ARM9 or ARM7!!!!

Started by jagdish.dsp in comp.arch.embedded18 years ago 13 replies

Dear Friends, In my design I need to develope a DSP algorithm on one DSP processor and then to interface same with ARM which is handling all...

Dear Friends, In my design I need to develope a DSP algorithm on one DSP processor and then to interface same with ARM which is handling all the peripherals. I am thinking if my DSP algorithm can be implemented on ARM or not...so need you help. Right now I am using evaluation board of Texas DSK, so taking the input from microphone is given to CODEC(A to D conversion) whose sampling freq is 3...


Idle time of a processor

Started by vivek in comp.arch.embedded16 years ago 8 replies

How do i measure the idle time of a processor? I use RTX and ARM7.

How do i measure the idle time of a processor? I use RTX and ARM7.


Easy In-System Programming for Atmel ARM7 ?

Started by Mel in comp.arch.embedded15 years ago 6 replies

I have a client who needs to write program hex files to flash in installed AT91SAM2S256 chips. The board is fitted with the standard ARM 20-pin...

I have a client who needs to write program hex files to flash in installed AT91SAM2S256 chips. The board is fitted with the standard ARM 20-pin JTAG connector. I'm getting my head around OpenOCD and gdb, but they seem too complicated for a civilian. Would anyone like to share experiences with simpler software, possibly Windows-based? Recommendations for interface hardware, software p...


New ARM7 development board with Atmel AT91SAM7X256

Started by David Fowler in comp.arch.embedded18 years ago 6 replies

Does anyone have information on the Make Controller Kit board? Is $150 a good price? According to www.uCHobby.com it has the new Atmel...

Does anyone have information on the Make Controller Kit board? Is $150 a good price? According to www.uCHobby.com it has the new Atmel AT91SAM7X256 with everything except the kitchen sink; 256K Flash, 64K SRAM, JTAG, Ethernet, CAN, USB, 3 UART, 10 A/D, 4 PWM, 2 SPI, Watch Dog Timer, POR and Brownout etc...


will Parallax's Propeller IC be successful

Started by Anonymous in comp.arch.embedded18 years ago 5 replies

Over time most embedded design people reach familiarity with a controller and mostly C language. And with time we do get better performance and...

Over time most embedded design people reach familiarity with a controller and mostly C language. And with time we do get better performance and more functionality from the silicon suppliers. I work mostly with the LPC (ARM7) family and I am happy with it. I spend 3 hours reading a short article and looking at the tools of the new Propeller Chip. Parallax designed a simple 32 bit CPU and li...


Looking for embedded Module with a VGA port

Started by Thomas Reinzer in comp.arch.embedded19 years ago 4 replies

Hello, I am looking to buy an embedded microcontroller board with the following features: 1) Small (something like PC104 or smaller) 2)...

Hello, I am looking to buy an embedded microcontroller board with the following features: 1) Small (something like PC104 or smaller) 2) Direct connection for VGA monitors with graphic mode of at least 640x480 pixel, with at least 16, preferably 256 colors. 3) CPU power needed ist something in the ARM7/ARM9 or 80486 range 4) Relatively low powered (~3-4 Watt max.) 5) Pc compatibility ...


Good document on ARM cache policies w.r.t. timing?

Started by larwe in comp.arch.embedded17 years ago 4 replies

Once I finish preparing the materials, I'm giving a short lunchtime presentation at work about estimating CPU loading and latency. I'd like to...

Once I finish preparing the materials, I'm giving a short lunchtime presentation at work about estimating CPU loading and latency. I'd like to add some discussion about the difficulty of doing a simple count-the-cycles analysis on multi-cached, pipelined RISC architectures, where things start to get nondeterministic. I'm particularly keen to describe how this might affect ARM7[xxx] and ARM9...


Structures with variable length array known at compile time

Started by aravind in comp.arch.embedded15 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.embedded17 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.embedded17 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.embedded15 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.embedded15 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.embedded19 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.embedded17 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.embedded17 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...



The 2024 Embedded Online Conference