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Internal eeprom acces with Atmega16
Yannick - 7 years ago
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...
Log runtime to EEPROM?
Bubb - 7 years ago
I want to log the total runtime of an application to an EEPROM. But I must
have a secure method to do that if the application get turned of at that
moment when I write the data to the EEPROM.
The runtime is going to be saved to the EEPROM about every 30 minutes or so.
Any suggestio...How to use the EEPROM on MC9S12XDP512?
jeasey - 4 years ago
Hi,Everyone,
NOW,I use XDP512.
I can not use the Internal EEPROM of XDP512 after serveral EEPROM
wrting,erasing and reading test.
Could anyone give me how to initialize the Internal EEPROM .
It is best if procedure,i can learn it.
Thinks!!
...Accessing external I2C EEPROM with Cypress EZ-USB dev kit
galapogos - 6 years ago
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...CRC calculation for variables stored in eeprom
Started by ssubbarayan 6 years ago
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 ...Initializing RTL8019AS in C
Trespasser - 5 years ago
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 done, though.
Anyone have a C code example of how to initialise the 8019AS NIC to start
without the serial EEPROM?
Regards...PIC16F628: what's the addr of EEPROM?
Started by Michael 9 years ago
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 (AT90S2313) EEPROM
Started by Tony Smith 9 years ago
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...Cypress FX2 EEPROM image won't run
LeftSpin - 7 years ago
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...ATMega128 -- Difference between flash/eeprom
Started by Ben Nguyen 9 years ago
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 ...AVR EEPROM writing
Started by Unknown 8 years ago
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...Example code in C for R/W data to EEPROM
Started by comus 8 years ago
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 w...24C02 and 24C64
Rohan - 6 years ago
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 ...Strange EEPROM related issue
cerr - 1 year ago
Hi,=20
We have a fully functional system but saw twice so far (in 100+ samples) th=
at the values in the EEPROM sometimes seem to be messed up. We suspect that=
this is happening after powering on & powering off the system a few times =
repeatedly but have been unable to reproduce the iss...PIC EEPROM EEIF flag polarity
Started by Unknown 7 years ago
Just wondering if someone could suggest a workaround for this snippet
of pseudo code:
if ( eeif == 1 ) {
eeif = 0
// write eeprom
}
This piece of code (written in assembly) goes into the main loop of my
program and allows the main loop to continue executing while the EEPROM
takes...eeprom problems
leilei - 4 years ago
Hi, is there any documents instruct how to read data from eeprom, like
93c46?
I have 93c46's datasheet and source code from linux rtl8139 driver,
but I still can not understand the detail.
...SPI-EEPROM read problem
techie.embedded@gmail.com - 6 years ago
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...Reading EEPROM data, ATMEGA16, with imagecraft c-compiler
Started by fabrizio 9 years ago
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
...
...
...refreshing RAM from EPROM
Started by GG 9 years ago
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 ...Read EEPROM Memory on a mc9s12dg256 from Motorola
Started by Unknown 8 years ago
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 !
...EEPROM cell failures
Started by antares 9 years ago
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
...MPC8260 - I2C - single channel 1-wire master (DS2482) - 1 wire EEPROM (DS2433)
Started by Unknown 8 years ago
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...i2c eeprom.c driver supports 2 address bytes?
Started by Unknown 6 years ago
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. Has anyone configured the eeprom driver
for devices that ne...Setting the RESET vector on a 68HC11A0
hjartar@googlemail.com - 6 years ago
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
witho...parallel eeproms and 8051
Started by funkymunky 8 years ago
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...question on ARM comparing to AVR
cutemonster - 7 years ago
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 ...CY7C68013 remove EEPROM
Started by ewaite 8 years ago
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
...custom VID/PID help
milappatel - 4 years ago
can anybody help me...?
I hv 1 FT232BM chip and EEprom 93lc46.
I am configuring my EEPROM using Eprog 3.0 software.
In that I do change with my own VID and PID both and downloading it to
EEPROM. and change the FTdibus.inf / Ftdiport.inf file with both VID and
PID.
but the problem is everyt...Xicor X28HC256 EEPROM
Started by Karl-Heinz 7 years ago
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...What is preferable for storing parameters FLASH or on-chip EEPROM ?
Started by yossi_sr 8 years ago
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...Please give solution there is problem while interfacing AT25010A(serial EEPROM) with LPC 2103
penchaljammula - 4 years ago
Helloo,
I'm interfacing LPC2103(SPI0) with Serial EEPROM AT25010A to write
data in to the EEPROM I have to sent 2 COmmands
WREN(0x06),WRITE(0x02),Address(Let 0x00) and data(let 0x41) i'm using Keil
debugger.
While i'm writing S0SPDR register(with out interfacing AT 25010A) with
these commands ...EEPROM guarantees after power loss during a write
John Devereux - 5 years ago
Hi,
I am wondering what guarantees are there for existing EEPROM data,
after power is lost during a write operation?
I am writing a datalogging routine that writes records to an
EEPROM. It's an Atmel 24C1024, although the question is probably
applicable to other devices too. This uses "...6802 - RS232
Started by Unknown 7 years ago
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.
...Cypress EZ-USB FX2 firmware downloading
galapogos - 5 years ago
Hi,
I have a Cypress EZ-USB FX2 USB mass storage device. AFAIK firmware is
only allowed to be downloaded to either the external EEPROM or
internal RAM when the device either
1) Does not have an EEPROM, or
2) Has an empty EEPROM without any existing firmware
When this happens, the host PC w...Serial Flash vs Serial EEPROM ( sorry of you see the message twice)
elil - 2 years ago
Dear,
I'd like to understand why ALL Serial Flash chips always come with SPI
vs Serial EEPROM chips that always come with I2C ? Why not vice versa
for example? For my current project I'd like to add a small external
memory, let's say 16 kBytes, as a backup for some case. Writing to
EEPROM is ...Sistema antimanomissione e Cancellazione Eeprom
Started by .::[ IchiGeki ]::. 9 years ago
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
canc...Anyone seen ATMega8515 lose eeprom data?
Started by Mike Harrison 9 years ago
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 ?
...Why Serial Flash has SPI, but Serial EEPROM - I2C ?
elil - 2 years ago
Dear,
I'd like to understand why ALL Serial Flash chips always come with SPI
vs Serial EEPROM chips that always come with I2C ? Why not vice versa
for example? For my current project I'd like to add a small external
memory, let's say 16 kBytes, as a backup for some case. Writing to
EEPROM is ...Programmer for AT24C64
Started by James254 9 years ago
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...FPGA configration Data/Firmware
Started by Unknown 8 years ago
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...