Mac Address Problem

Fred
Hi,
I'm using mini6410 with Wince 6 and I need to change mac address because in
all boards I have it is the same -> so I can't use it in the same network.

I try to change Network address in
HKEY_LOCAL_MACHINE\Comm\DM9CE1\Parms\NetworkAddress in BSP without success.
I try also to change this value directly inside wince (via regedit) without
success.

In both case value is correctly saved, but MAC address used in network
protocol (what I can see in my DCHP server) is always the same.

Someone had solved this problem?

Thanks in advance.

Fred.

Tuxerito
?
?
?
http://www.friendlyarm.net/forum/topic/1664

Mehmet
Tuxerito, thanks for link,
I found it where in driver source code, it is in dm9isa.cpp.

--------------------------------------------  
  U16 eeprom[] = { 0xaae0,0dec8,0x5163};
  if( uWordAddress < sizeof( eeprom ) )
    return eeprom[uWordAddress];
  else
    return 0;

It is right. Run Time mac address is E0 AA C8 DE 51 63. 

I have changed "0xaae0,0dec8,0x5163" and build and installed to Mini6410,
but it is same, not changed. Mac Address is still E0 AA C8 DE 51 63.

I have searched in all driver files, but I don't find another where.
Please help me.
Thanks.

Mehmet
Problem is OK. I have changed Mac Address.
Thanks.

Mehmet...
www.armturkiye.com

domodom
Hello Mehmet, 
Can you explain us how you changed it ??
domodom

Tolun ARDAHANLI
I wrote an application for changing MAC address.

it gives Random adresses for last 3 octets.

vasanth
While i am booting xp sp3, 

CLIENT MAC ADDR: B8 B8 N8 B8 6F 6F
GUID: FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF
PXE-E51: No DCHP or proxyDCHP offers were receievd

PXE-M0F: Exiting PXE ROM.

error occurs and system does not bypass this error.

I cant able to boot the system.

Kindly help me to solve this problem.

Hakan
hi.. Mehmet can you help me ? i want to change mac address of mini2440, but
i can't.

dian
Hi..Mehmet, can you described again..how to change mac address??
thankyou for your valueable information.
Dian

mltk
Apologies for reviving a dead thread. This was a problem that also bothered
me for a bit. 

It appears that the driver attempts to load parameters from an EEPROM to
the DM9000 configuration registers on startup. However, there does not seem
to be such an EEPROM so the driver contained a "hack" that loaded a fixed
MAC address into the DM9000 register when that particular regsier address
was called. The code for this can be found in "dm9isa.cpp" under
"DeviceReadEeprom".

However, I would want to adjust the MAC address in the registry if
possible. I found that the driver does indeed access the registry and loads
the MAC address into the correct reegister on startup. This piece of caode
can be found in "driver.cpp" under the function "EDriverInitialize". The
actual line that seems to do this is:

m_pLower->DeviceRetriveConfigurations(hconfig);

However, a little after this, this line is executed:

m_pLower->EDeviceLoadEeprom();

where I believe the hardcoded MAC address is then written into the DM9000
registers overriding the previous value loaded from the windows registry.

To correct this, I modified the following code in "EDeviceLoadEeprom"
located in "device.cpp"

        for(n=0;n<(DIM(m_szEeprom)/sizeof(EEPROM_DATA_TYPE));n++,pcurr++)
  {
    *pcurr = DeviceReadEeprom(n);

  } // of for offset n

where I changed the for loop to:

        for(n=6;n<(DIM(m_szEeprom)/sizeof(EEPROM_DATA_TYPE));n++,pcurr++)
  {
    *pcurr = DeviceReadEeprom(n);

  } // of for offset n

I believe this skips the first 6 bytes that contain the MAC address in the
DM9000 so that it is not overwritten. Although the whole procedure seems
superflous as I dont think is an eeprom to read from in the first place.

This was after a lot of tinkering so I am unsure if I left anything out.

Please note that this will probably set the MAC address on bootup to
00:00:00:00:00:00 if there is nothing in the Windows registry.

Manoj
Hello Mltk,

I changed my code snippet as you suggested. But still no luck. MAC address
remains the same for all the devices. 

Can anybody suggest how can i change the MAC address for mini 2440 boards
in windows ce platform.

Durk
There is an app 'imac.exe' that should make it possible to change the MAC
for us. The app if from friendlyarm but I can't find it anywhere.

Would anyone be so kind to post this app online?

Thanks,
Durk

Miguel
In Windows CE 6.0 it's easy

Change in regristy HKEY_LOCAL_MACHINE->COMM->DM9CE1->PARAMS->
SoftwareMacAdress that you want. Be sure to set to 1 UseSoftwareMac in the
same Key.