Flash erase time

Started by Dimiter_Popoff in comp.arch.embedded5 years ago 21 replies

I had to replace a flash chip yesterday because it would not read OK at times - and had a byte fail after programming about all the 2M of...

I had to replace a flash chip yesterday because it would not read OK at times - and had a byte fail after programming about all the 2M of it. Since I don't do large volumes this is my first ever experience of the kind and I want to ask the group for some insight. The part was an Atmel at49bv163d ; it was on a netmca board which came for repair (torn power cable...) after a few years at th...


Best way to get frequency of a signal on the Atmel AT91R4008?

Started by James Johnson in comp.arch.embedded15 years ago 2 replies

I need to know the frequency of a signal that varies from about 1 Hz to 20 Hz. I was thinking of setting up an external interrupt that...

I need to know the frequency of a signal that varies from about 1 Hz to 20 Hz. I was thinking of setting up an external interrupt that interrupts when the RPM magnet goes by and to read one of the 3 timers in the processor to compute the period of the signal. Does that sound like the correct way to do this? It seems that I could do something with interrupting the timer directly instead,...


LPC2114 - where to buy?

Started by Jukka Marin in comp.arch.embedded15 years ago 2 replies

We'd like to use the Philips LPC2114 in a new design (we need 8 capture channels, a serial port etc.), but all the dealers say the lead time...

We'd like to use the Philips LPC2114 in a new design (we need 8 capture channels, a serial port etc.), but all the dealers say the lead time is 24 weeks. We can't possibly wait this long to have a pilot series manufactured. Is there any place where we could buy, say 50 of these MCU's _now_ or do we need to use some other chip? I would consider using the new Atmel AT91SAM... chips, but the...


Newbe Crosscompile a ModuleDriver for arm

Started by Hans-Dominik in comp.arch.embedded15 years ago 3 replies

Hi there Sorry for this NewBe question, I?m try o get started in using Atmel AT91RM9200 Board. I've read a lots of how-to and so on. Now...

Hi there Sorry for this NewBe question, I?m try o get started in using Atmel AT91RM9200 Board. I've read a lots of how-to and so on. Now running a 2.6 Kernel on it :) I'd like to use a USB video board on it so i think i have to cross compile this driver. My problem i doesn?t find any example through the internet which told me how to do this. Maybe someone could give me some tips. ...


Opinions on Atmel Studio4 sw?

Started by Martin Griffith in comp.arch.embedded11 years ago 5 replies

I'm still trying to get away from the 8051 with the Raisonance C compiler, which is normally fine for the junk I do. I've got the latest...

I'm still trying to get away from the 8051 with the Raisonance C compiler, which is normally fine for the junk I do. I've got the latest Winavr/GCC and Studio 4 installed, but I getting a bit suspicious of the simulator in Studio 4 when doing stuff in C It's probably me doing it wrong. The simulator/debug seems to miss single stepping through procedures, like my "TwiddlePORTD" routine...


Getting started with AVR and C

Started by Robert Roland in comp.arch.embedded7 years ago 152 replies

I am quite used to playing with PICs and JAL v2. I use the PicKit3 for programming and debugging. Now I want to learn C and AVR. I thought it...

I am quite used to playing with PICs and JAL v2. I use the PicKit3 for programming and debugging. Now I want to learn C and AVR. I thought it may be a good idea to do both at the same time. I already have a device with an ATMEGA168 in it. I want to write my own firmware for this device. I have installed the Atmel Studio 6 and downloaded the data sheet for the '168. Now I need a progra...


Atmel Introduces World's smallest Microcontrollers?

Started by Bill Giovino in comp.arch.embedded9 years ago 24 replies

http://microcontroller.com/news/Atmel_smallest.asp Teeny tiny uDFN package that is only 2mm on each side. Bill Giovino Executive...

http://microcontroller.com/news/Atmel_smallest.asp Teeny tiny uDFN package that is only 2mm on each side. Bill Giovino Executive Editor http://Microcontroller.com Follow Me: http://twitter.com/BGiovino


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 ...


PWM Detection

Started by clark in comp.arch.embedded11 years ago 12 replies

Howdy Group, I'm currently working on a project which requires detecting a PWM train using a microcontroller. The pulse width must be between...

Howdy Group, I'm currently working on a project which requires detecting a PWM train using a microcontroller. The pulse width must be between 800ns and 35us to be considered valid, and the duty cycle must be 1% +/- 2%. Additional requirements are: 1) The uC be in as small a package as possible, something like an 8pin Atmel AVR uC or PIC may do the trick. 2) No external oscillators may b...


Help to choose a new MCU

Started by abrous in comp.arch.embedded9 years ago 10 replies

Hi to all, I work in POS and cash registers design industry since 1995. I use Atmel AVR ATMega128 for almost a decade for the most of my...

Hi to all, I work in POS and cash registers design industry since 1995. I use Atmel AVR ATMega128 for almost a decade for the most of my designs. Because of lack of features but mostly because of the rising prices and availability issues recently I decided to move to another MCU (preferably from different brand). I've spent some days looking around and now I am a little bit confused. So,I'd ...


Controlling 16 RC servo motors simultaneously

Started by RC servo in comp.arch.embedded15 years ago 10 replies

Is there any C code for ATMEL's AVR micro controllers to read servo motor position data from a serialport and control 16 RC servo...

Is there any C code for ATMEL's AVR micro controllers to read servo motor position data from a serialport and control 16 RC servo motors simultaneously?


ready to run 32bit controller

Started by Paul Geisler in comp.arch.embedded9 years ago 14 replies

Hello, does anybody know a more powerful Atmel AVR pendant? Is there any 32bit controller that can make a LED blink with only controller,...

Hello, does anybody know a more powerful Atmel AVR pendant? Is there any 32bit controller that can make a LED blink with only controller, battery, resistor, LED? thanks very much Paul


25LC1024 SEEPROM

Started by Gary Peek in comp.arch.embedded14 years ago 5 replies

So I was looking through the DigiKey catalog to see how large a serial EEPROM I could get, and found the Microchop 25LC1024, a 128K by 8. I try...

So I was looking through the DigiKey catalog to see how large a serial EEPROM I could get, and found the Microchop 25LC1024, a 128K by 8. I try to order one and was told "August". ??? Damn! So then I try the similar Atmel part, with no luck, then the 32K by 8 chip from both manufacturers too. So who is sucking up all these parts? Or has DigiKey just jumped the gun putting them in their ...


Spec Int figures for ARM and Xscale.

Started by ghazanhaider in comp.arch.embedded13 years ago 2 replies

I've seen plenty of MIPS numbers for ARM, but I'm looking for SpecInt95 SpecFP95 and SpecInt2000 for ARM7TDMI ARM9xxx MPUs, especially for...

I've seen plenty of MIPS numbers for ARM, but I'm looking for SpecInt95 SpecFP95 and SpecInt2000 for ARM7TDMI ARM9xxx MPUs, especially for the LPC2000 and atmel microcontrollers. Information for the Xscale chips would be good too. Google hasnt yielded much except a few confusing student papers. Where can I look?


qwerty keyboard

Started by Giri Nirkondar in comp.arch.embedded16 years ago 3 replies

I am looking to add a small qwerty keyboard to my project (has an Atmel MCU and LCD). Do not want to use PS2 keyboards. Where can I get a small...

I am looking to add a small qwerty keyboard to my project (has an Atmel MCU and LCD). Do not want to use PS2 keyboards. Where can I get a small keyboard (like the one used in handheld organizers/PDAs/databanks)? Hope someone could give me some pointers. Thanks!!


How to brownout op amp

Started by Henry Parr in comp.arch.embedded15 years ago 7 replies

I am designing an Atmel-based circuit with an associated single supply op amp. I do not want the op amp Iq to deplete batteries any further than...

I am designing an Atmel-based circuit with an associated single supply op amp. I do not want the op amp Iq to deplete batteries any further than down to about 1V after the programmed micro brownout. Note that the batteries are not to be manually switched off. What is the simplest way of doing this? Thank you, Henry


small uCs with CAN?

Started by Michael Noone in comp.arch.embedded14 years ago 9 replies

Hello - I'm looking for a small microcontroller that has an onboard CAN controller. If it also had an onboard CAN transciever that would be...

Hello - I'm looking for a small microcontroller that has an onboard CAN controller. If it also had an onboard CAN transciever that would be great - but I've yet to see that in any microcontroller so I'm not getting my hopes up. The problem I've run into is that I'm working on a very small board that needs a CAN interface. Right now I'm planning on using an Atmel AT90CAN128 but I'm early ...


Next logical step after 8bit uCs?

Started by Michael Noone in comp.arch.embedded15 years ago 39 replies

Hi - so I've gotten to the point where I feel fairly competent with Atmel AVRs (8 bit microcontrollers) - but I'd like to find something with a...

Hi - so I've gotten to the point where I feel fairly competent with Atmel AVRs (8 bit microcontrollers) - but I'd like to find something with a bit more power. Specifically, I really need a chip that is capable of doing more sophisticated math, ie 16 or 32 bit calculations, multiplication, division, powers, etc. I know some of this can kind of be done on AVRs, but it can't be done well, ...


Atmel and GCC

Started by mc in comp.arch.embedded13 years ago 2 replies

Ulf, while we have you "on the line," let me ask another thing... Over the weekend I tried out both ImageCraft C and GCC. (With a small...

Ulf, while we have you "on the line," let me ask another thing... Over the weekend I tried out both ImageCraft C and GCC. (With a small program I got very similar results; I didn't try anything big enough to really bring out a difference.) What impressed me is that AVR Studio comes preconfigured for GCC, and once I installed WinAVR (even though I didn't install it in the usual place),...


computer-driven fans II

Started by Ron Ford in comp.arch.embedded11 years ago 27 replies

I intend to use WINAVR from Atmel to give instructions to a fan. My computer is fifteen feet from the fan. The target device, a...

I intend to use WINAVR from Atmel to give instructions to a fan. My computer is fifteen feet from the fan. The target device, a RISC-8 controller, is between. If the fan is to be the one that I've salvaged for this purpose, it has two hot wires and would be governed by either being on or off. Given that I have a hundred bucks to get necessary "software-hardware," what do I need to ...