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EEPROM
Comp.Arch.Embedded is a worldwide Usenet news group that is used to discuss various aspects of Embedded Systems development.
We found 420 threads matching "eeprom"
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The most relevant threads are listed first
Accessing external I2C EEPROM with Cypress EZ-USB dev kit
galapogos - 22:55 07-10-07
Hi,
I have the Cypress FX2LP development kit, and according to the manual,
I can select either large EEPROM(Microchip 24LC128) for simulation or
small EEPROM(Microchip 24LC00) for debugging. Since I'm still in my
development stage, I'm debugging the firmware, so I'm choosing small
EEPROM. The...
Re: Problems reading data EEprom on Pic 16F88
Gary Kato - 05:57 14-11-04
I think you are confusing EEPROM with the File Registers. Their adresses
overlap each other. When you do this:
movlw h'BB'
movwf count1
You are moving BB into the File Register at location 20. This is not altering
EEPROM which can only be addressed using the EEADR register.
When y...Internal eeprom acces with Atmega16
Yannick - 12:33 14-03-06
I have a problem with using the internal eeprom of the atmega16. I am
using codevision C and in the help file they say to do something like
this :
//declare global
eeprom a=0;
then then you can write the eeprom with changing the value for a , the
eeprom adress is the adress the compiler h...CRC calculation for variables stored in eeprom
ssubbarayan - 01:50 12-06-07
Dear all,
I have posted a couple of months back about eeprom corruption and
some experts here adviced me to stored a CRC value for the memory
contents to determine corruption.Regarding this I have got a query:
In our case,the contents in the eeprom change dynamically in run
time.Does that ...Cypress FX2 EEPROM image won't run
LeftSpin - 18:55 22-03-06
Cypress technical support has been really horrible, I hope someone here can
help.
I have a program for the FX2LP part. It runs fine when loaded with the Keil
debug monitor, but does not
run when loaded via CyConsole, or loaded into EEPROM.
For the EEPROM, I'm using this command line:
h...PIC16F628: what's the addr of EEPROM?
Michael - 10:51 17-06-04
Where in the docs is the starting address of EEPROM defined?? A program
I wrote a year or so ago has EEPROM data ORG'd and DEFINED at 0x1200,
but I have no idea were I got that address!
Having a senior moment, I guess.
Michael
...AVR EEPROM writing
01:01 14-01-05
Hi,
I have a problem when using gcc-avr to write internal eeprom. I used
library calls eeprom_write_word, eeprom_write_byte, eeprom_write_block
to write the content. However, I found that when I reset the device by
powering off and on again, the eeprom reading is refill to be all 0xff.
Have I...AVR (AT90S2313) EEPROM
Tony Smith - 18:10 24-01-04
I have been doing a lot of searching and reading, but haven't found what I
need. I would like to store values at a specific EEPROM address and to have
an initial value. I know how to declare a varible that will compile to be
programmed in the EEPROM starting at address 0.... But I want to spec...ATMega128 -- Difference between flash/eeprom
Ben Nguyen - 02:18 14-01-04
Im trying to learn microprocessors, and Im a bit confused about
flash vs eeprom.
1. Does my program that I download (via ISP ribbon cable) go into the EEPROM
or the FLASH?
2. Can my user program use the EEPROM at run-time or must it be programmed
ahead of time?
3. How does a bootloader ...question on ARM comparing to AVR
cutemonster - 15:01 03-11-06
I have experience developing 8051 but I'm very new to ARM comparing to
AVR.
My question is how ARM save data since it doesn't have built in eeprom
like AVR? I checked many ARM eval board but they all don't have external
eeprom.
I found a ARM board that completely suit my needs but it doesn't ...Re: Initializing RTL8019AS in C
Trespasser - 21:45 04-01-08
Resolved
"Trespasser" wrote in message
news:477c8dd7$0$25529$5a62ac22@per-qv1-newsreader-01.iinet.net.au...
> Hi,
>
> I can start a RealTek 8019AS network interface controller IC when it has
> the 9346 EEPROM attached, but can't get it going without the EEPROM. I
> know it can be...Re: Problems reading data EEprom on Pic 16F88
Gary Kato - 21:49 13-11-04
> I was unsuccessful getting my program to work writing Eeprom, so
> decided to start at the beginning and try to get the simpler process
> of reading Eeprom to work first then I'd move onto writing.
If your write was unsuccessful, why do you expect to read BB from that EEPROM
location? If the...refreshing RAM from EPROM
GG - 09:12 11-11-04
I'm working on a project where they implemented a data store in EEPROM and a
copy of it in RAM. The RAM copy is updated all the time and a low priority
task writes it back to EEPROM.
There is also a task that eery once in a while copies back from EEPROM to
it's RAM shadow. I can't understand ...Example code in C for R/W data to EEPROM
comus - 07:01 13-06-05
Hello all,
i'm trying to write data into the EEPROM of the PIC 16f877A.
I use the CCS-Compler Version 3.219 and an 16f877a with 368kb memory.
as i want to use the eeprom to store static data i want write into and
read from the eeprom. i used the "internal_eeprom.h" from ccs but with
no re...SPI-EEPROM read problem
techie.embedded@gmail.com - 02:57 29-03-07
hello members
I'm looking for some sample codes that interface TMS320F2812 with a
SPI-EEPROM.
The EEPROM I'm using is from Microchip and has a "1024 x 8-bit
organization " and "16 byte page "
I'm using some sample codes from TI themselves that actually implement
the read and write func...24C02 and 24C64
Rohan - 03:18 23-04-07
Hi All,
I have a routine for 24c02 which works very well. Now on the same PCB
I mounted a 24c64 in place of 24c02 EEPROM. The old Read/Write routine
didn't work on this.
I am unable to find what could be the possible problem. What are the
changes which have to be made when migrating a code ...Re: i2c eeprom.c driver supports 2 address bytes?
Boudewijn Dijkstra - 10:18 18-09-07
Op Tue, 18 Sep 2007 04:21:33 +0200 schreef :
> I have a i2c eeprom device (Microchip 24LC65) that has 2 bytes for the
> device address (this is the 2 bytes that come right after the control
> byte). The eeprom.c driver seems to handle devices that has only 1
> byte for the device address. ...Setting the RESET vector on a 68HC11A0
hjartar@googlemail.com - 09:56 15-02-07
Hello all,
I am trying to "reverse engineer" some older 68HC11 based equipment. I
got a hold of some nice circuit boards with general purpose I/O and
since I liked working with 68HC11's some 10 years back I got
nostalgic. Only thing is that these are 68HC11A0FN's and therefore
without any pro...Programming EEPROM for LLC 1394b TSB822AA2
awa - 03:09 07-08-07
Hi,
I couldn't find any thread that discuss this matter. Hence, I come to
the conclusion that this must be an easy problem except for me. I
would be happy if anyone could guide me on how to program an EEPROM.
Cheers!
...Reading EEPROM data, ATMEGA16, with imagecraft c-compiler
fabrizio - 19:21 11-12-04
Hei all,
The intension is to read out a table located in EEPROM using the imagecraft
C-compiler version 6.31A
Definition in C
---------------
#pragma data:eeprom
char Output_Ports_Table[] = { 0x38, 0x02};
#pragma data:data
..
..
In the program i write following code
...
...
...MPC8260 - I2C - single channel 1-wire master (DS2482) - 1 wire EEPROM (DS2433)
00:54 31-12-04
Hi,
I'm writing an I2C driver for the MPC8260 that needs to read/write to a
1-wire EEPROM via a single channel 1-wire master. Since I'm new to the
embedded world, I was wondering, if I want to send a READ ROM command
to the 1 wire EEPROM, how must I go about doing that via software? How
mus...parallel eeproms and 8051
funkymunky - 10:54 29-12-04
Hi..
Im new to embedded systems, iv started with the 89c51 uC. Ive never
used a parallel eeprom with the 89c51, thought iv used a serial one
with the i2c protocol (and had a tough time in getting the thing to
work, using sdcc :-( ).
My question is..can only a parallel eeprom be used to exte...EEPROM cell failures
antares - 07:56 03-09-04
Hello,
does anybody know when an EEPROM cell failure caused by too many
writings is detect? when I write a value and immediately after the
writng I read it or after some time?
thank you
...Sistema antimanomissione e Cancellazione Eeprom
.::[ IchiGeki ]::. - 07:32 15-11-04
Salve,
ho la necessità di realizzare un piccolo circuito con una eeprom che
dovrebbe essere utilizzato come sistema antimanomissione.
In pratica verrebbe collegato ad un miniPC inserito all'interno di un
contenitore metallico che se aperto dovrebbe far scattare un interruttore e
cancellare ...Read EEPROM Memory on a mc9s12dg256 from Motorola
06:13 31-01-05
Hi !
I have to write an EEPROM driver for an mc9s12dg256 from Motorola.
Everything is fine, but i cant find a command ro read from the eeprom
memory. There are commands for Writing and erasing, but no Command for
reading the memory. The Documentation from Motorola is real bad. Please
help !
...CY7C68013 remove EEPROM
ewaite - 09:47 12-08-05
Is there an easy software way to remove the vid/pid from the EEPROM and ge
back to the initial Cypress one?
Thanks
Eric
This message was sent using the comp.arch.embedded web interface o
www.EmbeddedRelated.com
...What is preferable for storing parameters FLASH or on-chip EEPROM ?
yossi_sr - 02:45 12-07-05
Hi All,
Where it is preferable to store log/history parameters:
in FLASH or in on-chip EEPROM ?
I am using AT89C51ED2 8-bit MCU from Atmel.
It has 2k EEPROM on-chip and 64kB Flash.
EEPROM programming features:
1) On-chip 2048 Bytes EEPROM.
2) Supports only Byte programming ( no page program...Selection of a microcontroller for Childs Toy...
00:15 30-06-05
Hi,
We are designing a simple childs toy with the following features:
* Must Respond to up to 5 buttons
* Output up to 2 minutes of preprogrammed sounds through a speaker
* Must be programmable to respond in different ways according to the
order of the button pressed
It is preferred that...Problems Booting TMS320VC5509A from serial EEPROM
Felix Collins - 00:48 06-04-04
Hi All,
I am having difficulties getting my TMS320VC5509A to boot from serial
eeprom. I can successfully boot from USB. I can write and read the
EEPROM and it appears that the data is being stored in it correctly. I
can use the same boot table to boot from USB.
When I try to boot from the ...Xicor X28HC256 EEPROM
Karl-Heinz - 02:55 24-01-06
Hi,
can anybody tell me where to find more internal information about the
Xicor X28HC256 EEPROM than in the normal product data sheet?
I'm especially interested in the page write operation.
Is there an internal RAM in this EEPROM which stores the incoming data
until the page write operation s...Programmer for AT24C64
James254 - 00:19 02-05-04
Hi All,
I support a product that's been manufactured with a bug in the flash memory
of the microcontroller. The factory has come up with a solution and the
design allows the update to be loaded via the products RS232 connector, so
this part is simple.
When the update is done I need to go in...Help new bie in TMS320LF2407A DSP programming
nasif4003@gmail.com - 03:06 05-08-07
Hello ALL
I am new DSP programming & Code composer. I have to build a windows
application which communicates with TI DSP by RS 232 PORT. TI DSP is
connected with a EEPROM 25LC050 through SPI. Windows application
sends data to DSP and ask it to save some data to EEPROM. Windows
application ca...6802 - RS232
03:18 08-06-06
hi everyone,
I am working on a project which has a 6802 processor and standard ram
and eeprom (not decided which bands yet). I wonder If I can write
sofware for 6802 in PC and can send it with rs232 port to eeprom.
...Anyone seen ATMega8515 lose eeprom data?
Mike Harrison - 08:00 20-10-04
A customer of mine recently changed from using AT90S8515 to ATMega8515 as the former is obsolete.
We've had a couple of units in the field lose eeprom data - we're still waiting to get them back to
look further but has anyone else seen anything like this ?
...Re: Continuous eeprom checksum microcontroller
Paul Keinanen - 15:02 16-07-04
On Fri, 16 Jul 2004 00:54:44 -0700, Guy Macon
wrote:
> Paul Keinanen says...
>
> > These circuits are exercised each time any program executes, not just
> > when the checker routine is executed
>
> You think that a eeprom checksum task exercises the same circuits
> (registers, RA...Continous eeprom checksum microcontroller
Vishal - 00:34 03-07-04
Hi, Anybody come across continous background checksum tests on
eeprom?? Is it worth doing ??
...Its NOT rocket science , only computers ..
werty - 14:21 06-03-07
PSRAM needs a 17th bit in the data path .
It SBZ , but when the end of the low
level code comes along , the clk
to the PSRAM unknowningly clocks
a different address !
The CPU need not waste time "RETURNING"
subroutine ! Its transparent RETURN .
---------------------...Q: Best Microcontroller for this job
--|-- - 18:33 26-01-04
Hello i was looking at using a atmel 8515 or a pic (not sure which variant
yet) for a project.
The microcontroller will be connected to a max186 for analog aquisitions
which will be stored in an eeprom, also looking at a keypad ,lcd,x10 and
serial pc interface to configure the unit and downlo...FPGA configration Data/Firmware
16:16 31-01-05
Hi all
I have no idea regarding low level hardware.
I should firgure out something about ALTERA ACEX.
Question is like following.
1.Are the FPGA configuration data and the firmware different?
2.How can I extract FPGA configuration data from ALTERA ACEX to my PC?
3.How can I extract firmwar...AVR EEPROM Endurance
Greg Schaefer - 11:25 06-05-04
I was wondering if anyone has experience with EEPROM endurence on Atmel
AVR parts. I have a controller project that requires a real-time clock
that I originally planned to implement via a DS1320+supercap. However, I
recently found a prebuilt board that does 90% of what I want but does
not includ...