TI DM642 NDK web server question

Stephenier Joe

TI give a demo of creating a web server :

//
// Main Thread
//
// We changed our CDB file to point call this private init
// function. Here we initialize our board and read in our
// MAC address.
//
void dm642_init()
{

    // Init cache mode manually
    CSL_init();
    CACHE_clean(CACHE_L2ALL, 0, 0);
    CACHE_setL2Mode(CACHE_128KCACHE);
    CACHE_enableCaching(CACHE_EMIFA_CE00);
    CACHE_enableCaching(CACHE_EMIFA_CE01);

bMacAddr[0]='D'; bMacAddr[1]=4;
bMacAddr[2]='A'; bMacAddr[3]=1;
bMacAddr[4]='Z'; bMacAddr[5]=1;

memcpy(IP_MAC,bMacAddr,6);

}

every time start the system, the code run.

TI gives DM642 a MAC adress of "D:4:A:1:Z:1",can we change this MAC address?

if we can , how we can change this?

over 12 years ago

0 Shankari G over 12 years ago

TI__Mastermind 43955 points

Hi Stephenier,

Moving your post to BIOS forum as it is about NDK.

Regards,

Shankari.

0 Steven Connell over 12 years ago

TI__Mastermind 45025 points

Which version of the NDK are you using?

You should be able to change the MAC address to one that matches your board and rebuild (assuming that the above code is in your application).

Steve

0 Stephenier Joe over 12 years ago in reply to Steven Connell

Prodigy 60 points

I use NDK 2.20.

but I think it doesn't matter with the version of NDK.

I tried to change the MAC address D-4-A-1-Z-2，and it works.

the MAC address is stored by an array called bMacAddr, as I mentioned above.

but if I change it to any other MAC address, the DM642 web server can't connect to the net.

why?

0 Steven Connell over 12 years ago in reply to Stephenier Joe

TI__Mastermind 45025 points

It looks like the MAC address is flashed into ROM. I took a quick look at the standard NDK client example for the DM642 and see this:

// Read in EMAC MAC Address
EVMDM642_EEPROM_read(0x00007F00, (Uint32)bMacAddr, 8);

So I'm not sure that just assigning bMacAddr[] to have a different address will work. The EMAC h/w most likely does filtering that compares the address in ROM with the destination address of incoming frames and drops any frames that don't match.

Have you been able to get the client example to work without changing the MAC address as you described?

Steve

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TI DM642 NDK web server question