RFC: "Comet" board with AT91RM9200

Started by Anonymous in comp.arch.embedded15 years ago 15 replies

Hello, we are designing a microcomputer named "Comet" based on the Atmel AT91RM9200 controller. All design files and software will be...

Hello, we are designing a microcomputer named "Comet" based on the Atmel AT91RM9200 controller. All design files and software will be licensed under the GPL. Currently the schematics is all what we have. We probably packed too much building blocks into the design. Before we cut down the design and start building the PCB it would be nice to hear what you think which optional building blo...


trouble interfacing 16MB SDRAM to AT91RM9200 :-(

Started by Mayank Kaushik in comp.arch.embedded14 years ago 5 replies

Hi everyone, ive been trying to interface a 16MB SDRAM (MT84LC8M16A2, 128Mbit, 2x16x4)with an AT91RM9200 con my custom board. As u might have...

Hi everyone, ive been trying to interface a 16MB SDRAM (MT84LC8M16A2, 128Mbit, 2x16x4)with an AT91RM9200 con my custom board. As u might have guessed, its not working. Ive checked and rechecked the continuity of all connections, they seem to be okay. The SDRAM and the uC are placed close to each other on the PCB (which me and my friend designed). The following is the list of connections, p...


AT91RM9200 SPI extrenal decoder problems

Started by pj0585 in comp.arch.embedded10 years ago

Hi, Has anyone tried using AT91RM9200 with external decoder for SPI? I'm trying to talk to 15 slaves through the SPI on my custom...

Hi, Has anyone tried using AT91RM9200 with external decoder for SPI? I'm trying to talk to 15 slaves through the SPI on my custom board. When I configure the SPI in the external decoder mode then the SPI peripheral is not giving chip select signals. If anyone has tried this and has come across the same problem please give me inputs on where I'm going wrong. Pj0585


AT91RM9200 bootloaders (to boot into u-boot)

Started by Darrell Harmon in comp.arch.embedded15 years ago 2 replies

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 ...


at91rm9200 startup code

Started by Jacek in comp.arch.embedded11 years ago

Hi, I have a simple startup code for a at91rm9200 processor. The idea was after the processor setup to restore the processor context saved in...

Hi, I have a simple startup code for a at91rm9200 processor. The idea was after the processor setup to restore the processor context saved in stack pointed by pCurrStack variable. I don't know where could be a problem becuase it sometimes works but more often it doesn't work. This code is downloaded by u-boot so some startup seuences are not necessary. I'll be gratefull for comme...


support for at91rm9200-ek in sam-ba

Started by pj0585 in comp.arch.embedded10 years ago 2 replies

Hi, Has anyone added new board support for AT91RM9200-EK to SAM-BA? If anyone has, then can you please send the files that were modified or...

Hi, Has anyone added new board support for AT91RM9200-EK to SAM-BA? If anyone has, then can you please send the files that were modified or give me indications on how to go about this. I'm surprised that atmel has not added support for this board in SAM-BA. pj0585 --------------------------------------- This message was sent using the comp.arch.embedded web interface on http:...


AT91RM9200: PIO: im getting two interrupts when i press the switch once :-(

Started by Mayank Kaushik in comp.arch.embedded14 years ago 6 replies

Hi, im learning how to use the AT91RM9200..right now im trying to tackle the AIC. iv set everyhting up, earmarking PIOA0 for an...

Hi, im learning how to use the AT91RM9200..right now im trying to tackle the AIC. iv set everyhting up, earmarking PIOA0 for an external interrupt through a switch connected to it, so that theoretically whenever the switch is pressed, an interrupt is generated that sends a string via the debug port to hyperterminal. everythings fine, but when i press the switch once, i get 2 interrupts....


How to write a GDB-STUB for AT91RM9200?

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

Hello,members! I want to add a debugging stub on AT91RM9200 target,I've looked at some information about it,but i don't know how to write...

Hello,members! I want to add a debugging stub on AT91RM9200 target,I've looked at some information about it,but i don't know how to write that AT91-stub.c? Introduction is: On the host, GDB already understands how to use this protocol; when everything else is set up, you can simply use the `target remote' command . On the target, you must link with your program a few special-purpos...


Interfacing any touch screen with AT91RM9200

Started by Tamilmaran S in comp.arch.embedded13 years ago 3 replies

Hi all, Now we are in study phase in analyzing to identify the microcontroller which is having in-build Ethernet port, memory interface...

Hi all, Now we are in study phase in analyzing to identify the microcontroller which is having in-build Ethernet port, memory interface (say CF) and USB port. Now we chose AT91RM9200 tha is the one which is having all these options. Could we interface any touch screen display with this microcontroller? If yes, how we have to interface it. My advance thanks to you. with regards mar...


at91rm9200 ek - ramdisk mounting issues

Started by linuxhgs16 in comp.arch.embedded10 years ago

Hi all, I used the buildroot to create the linux kernel and the root filesystem for the atmel at91rm9200-ek board. I configured the buildroot...

Hi all, I used the buildroot to create the linux kernel and the root filesystem for the atmel at91rm9200-ek board. I configured the buildroot to generate zImage. Also I did not change much of the configuration for busy box except that i disabled all options in the "Login/Password Management Utilities" list. Buildroot generated binary files zImage, rootfs.arm.ext2. Then using gzip i generate...


AT91RM9200: Errors in transferring file into SDRAM via HyperTerminal (xmodem protocol)

Started by Mayank Kaushik in comp.arch.embedded14 years ago 9 replies

Hi everyone, ive been trying to interface a 16MB SDRAM (MT84LC8M16A2, 128Mbit, 2x16x4)with an AT91RM9200 on my custom board. The SDRAM and the...

Hi everyone, ive been trying to interface a 16MB SDRAM (MT84LC8M16A2, 128Mbit, 2x16x4)with an AT91RM9200 on my custom board. The SDRAM and the uC are placed close to each other on the 2-layer PCB (which me and my friend designed). I wrote a small SDRAM test program that sends a unique *byte* to each location of the SDRAM, and then reads it back..it ran without any errors, all values mat...


boot.bin for AT91RM9200 problem

Started by Anonymous in comp.arch.embedded12 years ago 5 replies

Hi to all AT91RM9200 experts! As i am in deep trouble i kindly ask you for some help ... On my board, everything is running perfect...

Hi to all AT91RM9200 experts! As i am in deep trouble i kindly ask you for some help ... On my board, everything is running perfect (u-boot, linux, application on top of linux). The only thing that troubles me is the bootstrap code boot.bin that resides on the external flash (at 0x1000 0000). This boot.bin refuses to unzip and load any other u-boot exept the one that was delivered with ...


AT91RM9200/Davicom and Altima phy compability

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

Hello, We're having two ethernet problems with an Atmel AT91RM9200 CPU based construction. I'm interested if we are the only one having these...

Hello, We're having two ethernet problems with an Atmel AT91RM9200 CPU based construction. I'm interested if we are the only one having these problems... Our first attempt were to use a 16MHz crystal and the AT91 built-in PLL and programable clocks to generate the required 50Mhz and 25Mhz needed for a Davicom DM9161 PHY and a Davicom DM9000 10/100 ethernet controller (thus giving us two e...


at91rm9200 Board gets reset spontaneously

Started by Mayank Kaushik in comp.arch.embedded14 years ago 2 replies

Hi , Im trying to build a Development board for the AT91RM9200 and am using SDRAM in 16 bit mode , and 2 Mb Flash. I have managed to Store...

Hi , Im trying to build a Development board for the AT91RM9200 and am using SDRAM in 16 bit mode , and 2 Mb Flash. I have managed to Store U-boot in the Dataflash and to get it to boot from it. The Atmel Utility picks up U-boot from the Flash and runs it from SDRAM. The problem im having is that spontaneously while running , the System automatically Resets. This was not happening prior ...


AT91RM9200 problems to run from SDRam

Started by Reiner in comp.arch.embedded13 years ago 1 reply

Hi, We build own at91 board with an AT45DB642 and 64MB of SDRam. Above I'll describe some details. At45DB642 is attached to at91rm9200 on...

Hi, We build own at91 board with an AT45DB642 and 64MB of SDRam. Above I'll describe some details. At45DB642 is attached to at91rm9200 on CS0 and SDRam is using a 32bits of data path. We already tested both, and they are working without any kind of problem. We wrote data on At45DB642 and read it without errors, the same occured with SDRAM. What occurs is that when we run a program f...


AT91RM9200 synchronous serial to ethernet

Started by Sam Duncan in comp.arch.embedded15 years ago 2 replies

Hi I'm looking into a design to convert from synchronous serial interface (SSI) to ethernet. The ethernet connection will be a direct, point...

Hi I'm looking into a design to convert from synchronous serial interface (SSI) to ethernet. The ethernet connection will be a direct, point to point connection and will probably use UDP. I have looked at the data sheet for the AT91RM9200 and it seems as though it may work. I'm new to ARM devices and also to embedded ethernet and would greatly appreciate if anyone could answer the follo...


Buffers reqd for Flash??

Started by Mayank Kaushik in comp.arch.embedded14 years ago 1 reply

Hi, Im working on a prototype board for the AT91rm9200. I have been following the design of the AT91rm9200 EK. In using the same flash as...

Hi, Im working on a prototype board for the AT91rm9200. I have been following the design of the AT91rm9200 EK. In using the same flash as the obe used on the board, i have a small problem. Why have buffers been used between the chip`s lines and the lines of the flash? i have seen boards that use different flash chips and dont have buffers for the flash. What is the use of the buffer ...


AT91RM9200 SSC and I2S audio DAC

Started by Marcel-G in comp.arch.embedded15 years ago 1 reply

Is there anybody who has used the SSC of the atmel AT91RM9200 in master mode to control an audio DAC ? I used the settings as described in the...

Is there anybody who has used the SSC of the atmel AT91RM9200 in master mode to control an audio DAC ? I used the settings as described in the Atmel application note in my device driver, but when a data to the driver and watch output on a scope I see that left and right channels sometimes swap. After this I did a test by writing only one short ( 16bit ) into the SSC_THR and watch this da...


Ramdisk mounting issue-Pls help!! AT91rm9200-ek Board

Started by linuxhgs16 in comp.arch.embedded10 years ago

Hi all, I used the buildroot to create the linux kernel and the root filesystem for the atmel at91rm9200-ek board. I configured the buildroot...

Hi all, I used the buildroot to create the linux kernel and the root filesystem for the atmel at91rm9200-ek board. I configured the buildroot to generate zImage. Also I did not change much of the configuration for busy box except that i disabled all options in the "Login/Password Management Utilities" list. Buildroot generated binary files zImage, rootfs.arm.ext2. Then using gzip i generate...


AT91RM9200 Linux Board bootloader problems?

Started by Ethan in comp.arch.embedded7 years ago 1 reply

Hello, I am extremely new to this stuff and just got a AT91RM9200 Linux Board. I was going to download Python to it to make some programs....

Hello, I am extremely new to this stuff and just got a AT91RM9200 Linux Board. I was going to download Python to it to make some programs. After setting it up per the setup MANUAL, it seemed to lad fine. I proceeded to download Python but it just wouldn't work. I researched and found that i had an error when booting (Error bad CRC, continuing loading Linux environment). The best fix to this proble...