Hi everybody I have linux 2.6.15 on AT91SAM9261 that has AT45DB321D as dataflash. I need to write an application that erases the content of...

Hi everybody I have linux 2.6.15 on AT91SAM9261 that has AT45DB321D as dataflash. I need to write an application that erases the content of dataflash not at boot-time but while the system is running. Is this possible? I'd like to have suggestions on how to proceed Thankyou all

Hi, Does anybody tell me how can I delete completly an atmel dataflash wit U-Boot. I try this first: 1. I unprotect the areas of the...

Hi, Does anybody tell me how can I delete completly an atmel dataflash wit U-Boot. I try this first: 1. I unprotect the areas of the dataflash. 2 then i want to erase but i become follow messages: start and/or end adres not on sector boundary. I look at the atmel site datasheet of th dataflash, but i can't find there anything else sector boundaries. Thanks for your answers. ...

Hi I have a AT91RM9200 evaluation kit (AT91RM9200_EK). I want to know how could I use any devices other than DataFlash card for booting the...

Hi I have a AT91RM9200 evaluation kit (AT91RM9200_EK). I want to know how could I use any devices other than DataFlash card for booting the board and downloading the Win CE image? when I say "any devices other than DataFlash card" I mean onboard parallel flash or the MMC,SDcard and so on. thanks

Despite scouring the datasheet, I cannot find the answer to this question: Can you safely apply 5V inputs to Atmel Dataflash devices?...

Despite scouring the datasheet, I cannot find the answer to this question: Can you safely apply 5V inputs to Atmel Dataflash devices? (vcc=2.7V) It quotes the "Absolute Max input voltage" as 6.25V, so presumably it won't blow up, but will it work? I'm using a 5V processor and would rather like to not get involved in lots of level shifting. -- Tim Mitchell

hi, I have designed board with AT91RM9200 microcontroller and I've got some problems with programming it... I wanted to program any bootloader...

hi, I have designed board with AT91RM9200 microcontroller and I've got some problems with programming it... I wanted to program any bootloader into connected AT45DB041D dataflash. Right now I can't send data via DBGU - I thought it is MAX3232's fault but I replaced it and still nothing. However sending data from ARM to PC works ok. Instead of programming dataflash with xmodem I tried to do it th...

Hi all I wrote a flash file system for an 8051 project using a 2MB dataflash over the last 3 years. I tried to stay as close to stdio from dos...

Hi all I wrote a flash file system for an 8051 project using a 2MB dataflash over the last 3 years. I tried to stay as close to stdio from dos (fopen, etc) as possible. I had to shape and change it a few times as hind sight makes us cleverer. I needed some special functionality like shrinking the file from the front like a FIFO that caused me to veer of a bit (programmer?s creative license).

I have a number of boards with processors that communicate to about 10 different SPI connected devices, all on the same bus. 1 of these happens...

I have a number of boards with processors that communicate to about 10 different SPI connected devices, all on the same bus. 1 of these happens to be an Atmel DataFlash. The DataFlash appears to be experiencing a corrupted memory problem. These boards exist in fairly noisy environments and the PCB track length of the SPI bus can be about 20cm in total length. (1) Are there any "rule o...

Hello all, I have built a board that contains (besides a lot of other stuff) an AT91RM9200 and an AT45DB642 dataflash chip. Now I'm trying to...

Hello all, I have built a board that contains (besides a lot of other stuff) an AT91RM9200 and an AT45DB642 dataflash chip. Now I'm trying to code a homebrew boot loader. For a number of reasons, I cannot use U-boot. The boot loader works fine when loaded using a JTAG debugger (J-link), but it won't work when I try to load it using the boot ROM code that's built into the MCU. The MCU actuall...

Hi, Ive been developing a board based on the AT91rm9200 (arm920t). I have added 16 MB ram to this board, and am looking to add some...

Hi, Ive been developing a board based on the AT91rm9200 (arm920t). I have added 16 MB ram to this board, and am looking to add some flash. I want Linux installed on this board. (this is basically an educational project) My question is, do i HAVE to add a parallel flash? will such a system be capable of running Linux if i just add an 8MB SPI dataflash? As far as i know, a parallel flas...

Just been to uk.farnell.com to check for serial flash memory and almost all are Awaiting Delivery / Out of Stock / No Longer Manufactured. Is...

Just been to uk.farnell.com to check for serial flash memory and almost all are Awaiting Delivery / Out of Stock / No Longer Manufactured. Is there something else that is supposed to replace the serial flash or what?

Hello all Im trying to get linux up and running on my system. I have 16MB of SDRAM at 0x20000000 and 2MB of dataflash. I've started with the...

Hello all Im trying to get linux up and running on my system. I have 16MB of SDRAM at 0x20000000 and 2MB of dataflash. I've started with the at91rm9200dk files in the kernel as my start point, and I can get it to boot if and only if I disable my dCache. Im imaging there is a setting somewhere Im over looking that is still trying to map the caches with 32MB of ram (which the dk has) but I ha...

Since I'm doing a port for an architecture using also SPI flash for booting u-boot I need to remove the existing CFG_DATAFLASH configuration...

Since I'm doing a port for an architecture using also SPI flash for booting u-boot I need to remove the existing CFG_DATAFLASH configuration which should be portable as the name says but it is hardcoded only for the AT91RM9200DK platform. Don't know which one came to this idea also naming the AT45DB driver to dataflash.c. Asking here if someone could test the my changes so not only AT91...

Hello experts, I am using ARM7 for a project that needs to handle about 1 MB of systemdata and 1MB of logdata stored in a dataflash. I have...

Hello experts, I am using ARM7 for a project that needs to handle about 1 MB of systemdata and 1MB of logdata stored in a dataflash. I have been used to the database API in Windows CE, and have always found it very useful for smaller systems. Could someone advice on what I could do in my ARM7 project? How do you handle data? Is there any good embedded databases around for this purpose? ...

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...

Hi, Im a newb to working at this level with the kernel. (mainly a hardware guy) Anyways im trying to get 2.6.14 to run on my custom board. Ive...

Hi, Im a newb to working at this level with the kernel. (mainly a hardware guy) Anyways im trying to get 2.6.14 to run on my custom board. Ive got 16MB of SDRAM and 2MB of Dataflash, it enters the kernel but page faults, below is the whole nitty gritty, any suggestions on what could cause this/ were to look for a solution? U-Boot 1.1.2 (May 17 2006 - 15:46:16) U-Boot code: 20F00000 ->

I have been using the 8MB, AT45DB642, from Atmel for a number of years now. It has become apparent that some of the chips we use have stuck...

I have been using the 8MB, AT45DB642, from Atmel for a number of years now. It has become apparent that some of the chips we use have stuck bits at various locations. So far this has exhibited itself in two forms. (1) a consistent pattern that occurs through every one of the 8192 pages. (2) a random scattering throughout a portion of the memory. Anyone experienced something like this ...

I have a custom SAM9260 board, several of these will be installed in customer locations. Once installed they will not be...

I have a custom SAM9260 board, several of these will be installed in customer locations. Once installed they will not be physically accessible. I currently have a 2.6.20 kernel and a ext2 gzipped rootfs running from dataflash. I need suggestions on how to remotely upgrade the software in the future for this device from the network. I guess I can have a NFS or tftp server on a customer net...

I am trying to design a new board based on the AT91SAM9260 processor and had a few questions : - Any idea if the DP83848CVV Phyter from...

I am trying to design a new board based on the AT91SAM9260 processor and had a few questions : - Any idea if the DP83848CVV Phyter from National Semi would work with this proc. (it supports both RMII and MII) - I am not clear as to point of having both 16-bit NAND flash and serial DataFlash as shown in the AT91SAM9260-EK. It seems like one could use either flash chips for running linux, ...

I tried posting this once before but I think it was rejected because of inline images, i'll try posting it again with links to the images: I...

I tried posting this once before but I think it was rejected because of inline images, i'll try posting it again with links to the images: I have a 6 layered sam9260 board and I'm seeing something strange on the 18Mhz clock. This is a scan from the SAM9260-EK (reference) board, when there's any data written to the dataflash, a probe on the crystal shows this pattern. (notice the slight...

I have a board based on the AT91RM9200, and want to boot from SPI dataflash. The loader will proceed to boot u-boot (Which is too big for the...

I have a board based on the AT91RM9200, and want to boot from SPI dataflash. The loader will proceed to boot u-boot (Which is too big for the ROM bootloader to handle). I have read the atmel appnote on that, but boot program will need to be changed. My SDRAM is configured differently than the DK. The program with the appnote includes source, but it is missing quite a bit to be able to be ...