Basic circuit

Started by eden in comp.arch.embedded14 years ago 10 replies

Hello I am not sure is this the right group to post this kind of question, I hope I am not too much out off topic. I am quite new to...

Hello I am not sure is this the right group to post this kind of question, I hope I am not too much out off topic. I am quite new to electronics, although I am programming software already for many years. I understand very basic circuit's schematics, but for this http://www.captain.at/electronics/atmel-programmer/atmega16-programmer.png particular one (I saw it on other places also), I ...


Looking for memory manufacturers

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

We're having trouble hunting down sources for the particular flash/sram parts we need. Rather than providing a full spec of the parts...

We're having trouble hunting down sources for the particular flash/sram parts we need. Rather than providing a full spec of the parts needed (and expect someone here to find a perfect match :p), I was wondering if anyone knows of any other semiconductor companies not on my list that are manufacturers of memory [of any sort] and I'll go check them out. AKM, Alliance, Atmel (Temic), Aved, B...


AVR bootloaders

Started by Martin Griffith in comp.arch.embedded11 years ago 3 replies

Just spent an hour googling I'm trying to find a reasonable BL for the enduser, preferably using USB/FTDI or the silicon labs...

Just spent an hour googling I'm trying to find a reasonable BL for the enduser, preferably using USB/FTDI or the silicon labs thingy/equivalent. Just to update their AVR, nothing special, apart from "simple" and probably a lot of Mac users Using GCC Winavr, Ponyprog and atmel Studio4 I'm just sort of (still) learning the AVR, so any suggestions, plus /minus points would be


WINCE booting using UBoot

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

Hello Friends, As a part of my school project I have to develop an application on WINCE but before that have to port wince on development kit...

Hello Friends, As a part of my school project I have to develop an application on WINCE but before that have to port wince on development kit has Atmel AT91SAM9261 microprocessor. can anyone suggest what are the changes I need to do in config.bib and on UBoot code to make wince image to load using uboot bootloader ? Thanks in advance. Ankur.


FRAM FM3808 interfacing

Started by Glenn in comp.arch.embedded15 years ago 1 reply

I'm trying to design a circuit with Ramtron's non-volatile parallel FRAM with built-in RTC - the FM3808. The datasheet states that the FRAM...

I'm trying to design a circuit with Ramtron's non-volatile parallel FRAM with built-in RTC - the FM3808. The datasheet states that the FRAM works differently than SRAM, in that it needs the chip enable CE/ to toggle between each access and not stay low. This is because it is needed for the necessary precharge period. I'm using an Atmel ATmega128's external memory bus, and will be ...


Starting Bootloader at AT91RM9200-EK

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

Hi Im new to ARM9 processors and have the following problem: i want to run any executable code (that i can change) on my plattform. So i...

Hi Im new to ARM9 processors and have the following problem: i want to run any executable code (that i can change) on my plattform. So i found the Denx u-boot and can compile it. Then i tried to download it as stated on the atmel page by setting the jumper to INT then load the DataflashBoot.bin then load the u-boot to the dataflash. So far OK, can see the u-boot image at position c0008000. Wh...


Programming AVRs with AVRISP when using the SPI bus at the same time?

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

Hi I would like to ask a question because i would like to make sure before i try. I currently using a AVRISP programmer from Atmel which uses...

Hi I would like to ask a question because i would like to make sure before i try. I currently using a AVRISP programmer from Atmel which uses the SPI to program the AVR. And i want to also use the SPI for communication with a SD Card. I am wondering if there could be an issue. Because one of my friends that have the same programmer was using the programmer and EEPROM through the SPI and so...


Problem with interfacing LCD with AT89c51

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

Hello All, We are trying to interface 16*2 character LCD with Atmel AT89c51. We are using ACM1602A. the connection to the 8051 is port 1 is...

Hello All, We are trying to interface 16*2 character LCD with Atmel AT89c51. We are using ACM1602A. the connection to the 8051 is port 1 is used for data i.e. DB0-DB7 of LCD and the RS,R/W,E pins to P2.0,P2.1,P2.2 respectively. and the A and K pins to VCC and Ground respectively.The code for interfacing is as follows. ------------------------------------------------------------------------- O...


Code security on modern 32bit embedded processors

Started by tns1 in comp.arch.embedded11 years ago 3 replies

Wondered what the state of the art is on keeping embedded code secret. Who does it better these days? I see some secure processors from Atmel...

Wondered what the state of the art is on keeping embedded code secret. Who does it better these days? I see some secure processors from Atmel and a few others, but they seem more oriented to securing comms and data than in securing their own code.


Extra port?

Started by Anonymous in comp.arch.embedded14 years ago 6 replies

Hi, I am using an Atmel AT91RM9200 (ARM9) processor which has a single MAC built-in. I also have software drivers which support Ethernet...

Hi, I am using an Atmel AT91RM9200 (ARM9) processor which has a single MAC built-in. I also have software drivers which support Ethernet through this MAC. I have a reference design which uses the RMII interface to a PHY chip (Davicom DM9161). So far so good. However, I want to be able to change the reference design so that I can simultaneously attach two 10/100Base-T devices to this sing...


Booting ATMEGA2560

Started by ratemonotonic in comp.arch.embedded12 years ago 3 replies

Hi all , I have just designed a board with a JTAG interface and ISP interface ( with some good advice from past discussions on this forum)and...

Hi all , I have just designed a board with a JTAG interface and ISP interface ( with some good advice from past discussions on this forum)and have also bought the JTAG programmer. Now before I send the board for layout , I am looking at the nitty gritty of bootloading a hello world programme ( flashing leds!) on it. Does the ATMEL parts come preprogrammed with a standard bootloader in the...


Is the 8051 architecture public domain?

Started by Jean Nicolle in comp.arch.embedded15 years ago 6 replies

Lots of companies have 8051 compatible chips... Atmel, Dallas, Philips, Siemens... Is the 8051 CPU public domain, which could explain why so...

Lots of companies have 8051 compatible chips... Atmel, Dallas, Philips, Siemens... Is the 8051 CPU public domain, which could explain why so many guys chose to use it? Or do these guys still have to pay royalties to Intel? Thanks.


USB Host

Started by Martin in comp.arch.embedded15 years ago 33 replies

What's the least painful way to implement simple (as in a strictly limited set of connecting devices) USB Host support on a C8051-based design? ...

What's the least painful way to implement simple (as in a strictly limited set of connecting devices) USB Host support on a C8051-based design? USB Peripheral mode is easily handled with something like FTDI's chips. Atmel's AT43USB380 looks interesting. However, not sure if their API's support the 8051. Thanks, -Martin


Which is the most popular ARM-based microcontroller?

Started by Mayank Kaushik in comp.arch.embedded15 years ago 21 replies

Hi everyone, Ive only worked with the Atmel ARM variants, but im curious about knowing your views on which ARM-based microcontroller is the...

Hi everyone, Ive only worked with the Atmel ARM variants, but im curious about knowing your views on which ARM-based microcontroller is the most popular..Plz enlighten me! Regards Mayank


ST ARM versus Atmel ARM?

Started by John-Smith in comp.arch.embedded5 years ago 24 replies

This is a bit of a simplistic Q and I am in the early stages of deciding... My background is a huge amount of assembler on Z80, Z180, Z280,...

This is a bit of a simplistic Q and I am in the early stages of deciding... My background is a huge amount of assembler on Z80, Z180, Z280, 80x86, 8031, 8051, AT90S1200, H8/300, etc. Plus a bit of C. No C++. Now I am starting on a new product which will need about 1MB of *data* storage (factory initialised so can be on chip FLASH) plus some floating point maths, and will be done mostly i...


How to compare computing power of microcontrollers?

Started by Michael J. Noone in comp.arch.embedded14 years ago 7 replies

Hi - I'm trying to choose a microcontroller for a project I'm working on. Originally I had been thinking about using a 20Mhz Atmel AVR, such as...

Hi - I'm trying to choose a microcontroller for a project I'm working on. Originally I had been thinking about using a 20Mhz Atmel AVR, such as an ATMEGA168, but I became worried about the raw computing power of the AVR, as one of the main roles of this chip will be to do alot of 16 bit multiplication and trig at a fairly high speed. So I've been looking at using an ARM - specifically the Atm...


Atmel ATmega2561 is no better than PIC16F84

Started by John B in comp.arch.embedded14 years ago 24 replies

So I've finally got my precious samples of ATmega2561. With 256Kbytes of Flash I should be able to store massive look-up tables, but wait...

So I've finally got my precious samples of ATmega2561. With 256Kbytes of Flash I should be able to store massive look-up tables, but wait a minute the Flash memory is segmented into 64Kbyte lumps. The data sheet states: "For ELPM/SPM instructions, the Z-pointer is a concatenation of RAMPZ, ZH, and ZL" But is that really true? I find that I have the following instruction: ELPM Rd,Z+ ...


ADS1256 analog to digital converter

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

I'm having a real heck of a time with this chip, the TI ADS1256 A to D converter. Has anyone else here programmed this device before with a uC ....

I'm having a real heck of a time with this chip, the TI ADS1256 A to D converter. Has anyone else here programmed this device before with a uC . I am using an atmel atmega 162 . All of my outputs look alive and well, and the ADC sends back semi random data when I attempt to just read a configuration register. If anyone here has example code (pseudo code, assembler, c, any processor) I would b...


ADS1256 analog to digital converter

Started by Anonymous in comp.arch.embedded14 years ago 4 replies

I'm having a real heck of a time with this chip, the TI ADS1256 A to D converter. Has anyone else here programmed this device before with a uC ....

I'm having a real heck of a time with this chip, the TI ADS1256 A to D converter. Has anyone else here programmed this device before with a uC . I am using an atmel atmega 162 . All of my outputs look alive and well, and the ADC sends back semi random data when I attempt to just read a configuration register. If anyone here has example code (pseudo code, assembler, c, any processor) I would b...


Next generation products - microprocessor family

Started by Gian in comp.arch.embedded13 years ago 21 replies

Hi all, we're trying to solve a complicated task. We have to choose uP' family for our next generation's products. Since now we disperse a...

Hi all, we're trying to solve a complicated task. We have to choose uP' family for our next generation's products. Since now we disperse a lot of energy (and money of course) in different system equipped with: - infineon C167CRLM - fujitsu MB90545 - various microchip - some atmel (AVR) - some TI (don't remember partname) Mine product are something like PLC. To be more precise, produ...