ARM Interrupts

Started by Andrew Blackburn in comp.arch.embedded13 years ago 17 replies

Hi there Looking at several processors at the moment but ARM7 and Coldfire in particular. I like the popularity of ARM and associated tools,...

Hi there Looking at several processors at the moment but ARM7 and Coldfire in particular. I like the popularity of ARM and associated tools, but cant get over the fact that the interrupt structure within them (only two priority levels) is pants. Coldfire has 7 or 8 nestable levels. I would appreciate anyones view on this. Cheers Andrew


Rationale behind the Modebits

Started by Anonymous in comp.arch.embedded13 years ago

hi The mode bits of ARM7 in CPSR are of 5 bit width when the processor is capable of operating in one of the 7 modes. I would like to know what...

hi The mode bits of ARM7 in CPSR are of 5 bit width when the processor is capable of operating in one of the 7 modes. I would like to know what is the rationale behind using 2 additional bits instead of going only for 3 bits(that can represent max of 8 states). Has it got to do with anything related to simpler implementation logic or is it for any particular historic reasons associated with...


RTOS on ARM7

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

Dear Friends, I am very new to ARM family and right now working with lpc2214 and lpc2148 and EP9302 from cirrus logic. I can do basic...

Dear Friends, I am very new to ARM family and right now working with lpc2214 and lpc2148 and EP9302 from cirrus logic. I can do basic implementation and interfaces with them as I worked with 8051 long time. Now I want to do something with real time OS. I want to load Windows CE on ARM. I have never did this kind of work. So, can anybody tell me from where to start and from where I can get...


Best approach, LCD on ARM7

Started by Henr...@ work in comp.arch.embedded13 years ago 14 replies

Hello group, For a new project, we have almost decided on AT91SAM7X256 for a variety of reasons. Primarily due to its rich peripheral set and...

Hello group, For a new project, we have almost decided on AT91SAM7X256 for a variety of reasons. Primarily due to its rich peripheral set and previuos knowledge of Atmel Chips. But we need to implement a LCD display, preferably 320x240 pixels into our system and we would like some advice on the best way to do this. With respect to both hardware and software development. I.e how to get a ...


how to integrate OPTREX DMF50081 in arm board?

Started by LOVE_ME_TENDER in comp.arch.embedded15 years ago 13 replies

I will to learn from u and I wish to impress a friend with 3 of her pics ...rotating in color LCD at ARM7 board like Leon. because I have...

I will to learn from u and I wish to impress a 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? I got the OPTREX DMF 50081 now. I have been searching google to find driver. TIA.


AT91SAM9260 RTOS

Started by okalex in comp.arch.embedded13 years ago 7 replies

Hello again, We've decided to use the Atmel AT91SAM9260 for our project. The chip is probably a bit more powerful than we currently need, but...

Hello again, We've decided to use the Atmel AT91SAM9260 for our project. The chip is probably a bit more powerful than we currently need, but it's always nice to have room for future enhancements, and it's slightly more expensive than most of the ARM7 and Coldfire chips we were looking at. While waiting for my development kit, I'm trying to figure out what development tools and RTOS to u...


Newbie questions on ARM

Started by Anonymous in comp.arch.embedded11 years ago 8 replies

I've never used ARM microprocessors, so i have questions about. For now, i have only used 8 bit micropoccessors and i have programmed only in C...

I've never used ARM microprocessors, so i have questions about. For now, i have only used 8 bit micropoccessors and i have programmed only in C and asm language (i'm not expert in object oriented programming). I shoud use an ARM7 microprocessor. 1)What is the best ide for software development?Any site, reference , comparative table, suggestion? 2)Any book about this micro? I'm totally new, ...


Endianness of Data...

Started by julvr in comp.arch.embedded11 years ago 8 replies

Forgive me if this is a noob question, but this is my first chip bringup from scratch. I'm trying to bring up an ARM7 (ADuC7021), and am having...

Forgive me if this is a noob question, but this is my first chip bringup from scratch. I'm trying to bring up an ARM7 (ADuC7021), and am having a problem with the endianness of data, and I'm not sure how to fix it. My problem is this: if I call an internal function SD_OutputString("Bootloader.."), I get the following output on my serial port: "tooBdaol..re". In other words, it seems to...


Linux on ARM7TDMI

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

Hi All, I'm in my last year of Electronics Engineering, and am doing a project on VoIP using ARM. My group and I are currently looking for ARM...

Hi All, I'm in my last year of Electronics Engineering, and am doing a project on VoIP using ARM. My group and I are currently looking for ARM boards, and have recently shifted focus from ARM9 to ARM7 for want of money. Can I port RT- or Embedded Linux on ARM7TDMI(the one architecture easily available in India)? What're the requirements? Awaiting answers, Thanks.


Mystery Startup Failure

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

I'm using a Sharp LH79524 ARM7 microcontoller along with the IAR compiler and Segger's J-link. I was developing my program yesterday and it...

I'm using a Sharp LH79524 ARM7 microcontoller along with the IAR compiler and Segger's J-link. I was developing my program yesterday and it downloaded to the target and ran fine but this morning I have downloaded it and it gets stuck on the data abort exception. This happened with the project I did on Wednesday and I never managed to get it to load again. Both projects are based on a sma...


Motorola 68k platform availability

Started by Christian Walter in comp.arch.embedded13 years ago 1 reply

Hello, I am currently using a 68331 CPU in a existing design and I am thinking about it if it is really necessary to change the CPU....

Hello, I am currently using a 68331 CPU in a existing design and I am thinking about it if it is really necessary to change the CPU. Possible successor are Coldfire or ARM7. The reason why I want to stay is that I could cut down on development time and focus on application requirements. Reasons for upgrades are computational resources, power requirements and price. All of them are solvab...


ARM966E-S

Started by Gustavo Vargas in comp.arch.embedded10 years ago 6 replies

Hi all, Sorry about my newbe question, but I'm lost trying to figure out how to do that.... I'm expert in ARM7 design but aways using...

Hi all, Sorry about my newbe question, but I'm lost trying to figure out how to do that.... I'm expert in ARM7 design but aways using comential IDEs (not so expert). Now I'm working in a new project using an ARM966E-S core. And my intention is to use the GCC to generate de code (I never use it before). First of all: is it good or should I run from it (gcc)? Second: in the GCC docum...


new members coming in AT91 family

Started by Fred* in comp.arch.embedded15 years ago 25 replies

hello, just found this info about new family members in the Atmel ARM7 microcontrollers.. the AT91SAM7S look really great...

hello, just found this info about new family members in the Atmel ARM7 microcontrollers.. the AT91SAM7S look really great : http://www.at91.com/www/products/flyer/smart_flyer.pdf


Mindstorms NXT

Started by Dave in comp.arch.embedded13 years ago 6 replies

There is a review of the new Mindstorms NXT at http://arstechnica.com/reviews/hardware/mindstorms.ars Short summary: 32-bit ARM7 micro,...

There is a review of the new Mindstorms NXT at http://arstechnica.com/reviews/hardware/mindstorms.ars Short summary: 32-bit ARM7 micro, USB 2.0, Bluetooth, 4 input ports, 3 output ports, only (!) $250 USD for the kit. ~Dave~


ARM9 choices

Started by kert in comp.arch.embedded12 years ago 5 replies

hi, Heres a completely novel question : which ARM9 chip ? ;) Ok, just kidding. What i am really looking for is a bit of advice amongst my...

hi, Heres a completely novel question : which ARM9 chip ? ;) Ok, just kidding. What i am really looking for is a bit of advice amongst my fairly limited choices. First, i need a chip for an application, that is as integrated as possible ( who doesnt ? ) and the app needs Ethernet, ARM9 > 100mhz ( i really wish i could run on ARM7 but i cant ) and an LCD. Seems like an easy task, but a


Stack Trace

Started by Anonymous in comp.arch.embedded14 years ago 3 replies

Hi, Please guide me to the right group(s) if the post isn't on topic here. My program is running on a ARM7 h/w on top of an RTOS. I want to...

Hi, Please guide me to the right group(s) if the post isn't on topic here. My program is running on a ARM7 h/w on top of an RTOS. I want to dump the names of the functions that were called in the sequence they were called (stack) onto a file as part of the assert routine. Something like a core dump in *nix. How to implement something like this? Where do I need to look? Regards Sukrit...


[ARM7] MAC7100 and JTAG

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

Hi, Where can I find a schematic of JTAG interface for MAC7100 (ARM7DMI)? I would like to programming this uC, but I can't find free...

Hi, Where can I find a schematic of JTAG interface for MAC7100 (ARM7DMI)? I would like to programming this uC, but I can't find free programming tools. Thanks in advance. -- Piotr Piwko


Any low cost / free ARM simulators?

Started by Richard F. Man in comp.arch.embedded15 years ago 9 replies

As we mentioned previously, we are working on a version of our C compiler for the ARM chips, initially for the ARM7 microcontrollers (more...

As we mentioned previously, we are working on a version of our C compiler for the ARM chips, initially for the ARM7 microcontrollers (more devices supported later). Anyway, our assembler / linker and even the code generator are progressing well, and we are at the stage where we can use a good simulator or debugger to start debugging our tools. Currently, we are using evaluation version ...


difference bitween ARM 7 and ARM9

Started by Stan in comp.arch.embedded12 years ago 16 replies

Hi, Does anyone can explain me the difference bitween ARM7 and ARM9 ? -- -Stan

Hi, Does anyone can explain me the difference bitween ARM7 and ARM9 ? -- -Stan


Powering a LPC2114 ARM7

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

I am designing a board using a Philips LPC2114 (nice chip). It uses 1.8v for the core, 3.3v for I/O, and I also need 5v for some other circuits...

I am designing a board using a Philips LPC2114 (nice chip). It uses 1.8v for the core, 3.3v for I/O, and I also need 5v for some other circuits on the board. None of them use much current. The power supply is a 12v battery. What is the best way to get these voltages, without running down the battery? Is there a single device, such as a DC/DC converter that can produce these voltages? ...