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Altera_Forum's avatar
Altera_Forum
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14 years ago

MAC Address on altera de2 board

Helo,

i am using the altera de2 board and sending a packet via DM9000A ethernet controler .

i need the MAC address of the board , how knows in Which sector can i find it in the Flash memory.

thanks

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    Hope this can help you (it is a portion of the attached zip file): 

    
/*
* get_board_mac_addr
*
* Read the MAC address in a board specific way
*
*/
error_t get_board_mac_addr(unsigned char mac_addr)
{
  error_t error = 0;
  alt_u32 signature;
  alt_u32 mac_addr_ptr = EXT_FLASH_BASE + ETHERNET_OPTION_BITS;
  
/* This last_flash_sector region of flash is examined to see if 
 * valid network settings are present, indicated by a signature of 0x00005afe at 
 * the first address of the last flash sector.  This hex value is chosen as the 
 * signature since it looks like the english word "SAFE", meaning that it is 
 * safe to use these network address values.  
*/
  /* Get the flash sector with the MAC address. */
  signature = IORD_32DIRECT(mac_addr_ptr, 0);
    
  if (signature != 0x00005afe)
  {
    error = generate_and_store_mac_addr();
  }
  
  if (!error)
  {
    mac_addr = IORD_8DIRECT(mac_addr_ptr, 4);
    mac_addr = IORD_8DIRECT(mac_addr_ptr, 5);
    mac_addr = IORD_8DIRECT(mac_addr_ptr, 6);
    mac_addr = IORD_8DIRECT(mac_addr_ptr, 7);
    mac_addr = IORD_8DIRECT(mac_addr_ptr, 8);
    mac_addr = IORD_8DIRECT(mac_addr_ptr, 9);
    
    printf("Your Ethernet MAC address is %02x:%02x:%02x:%02x:%02x:%02x\n", 
            mac_addr,
            mac_addr,
            mac_addr,
            mac_addr,
            mac_addr,
            mac_addr);
  }
  return error;
}
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    Thenks for your help,

    i have another Question, so the address of the MAC is the first address of the last flash sector in the de2 board ( 0x00005AFE).

    so How can i know in this way the IP?

    tnx
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    I think the first address of the last flash sector is only a signature, the MAC address is found where mac_addr_ptr is pointing.

    The IP address is defined in simple_socket_server.h 

    
/* 
 * The IP, gateway, and subnet mask address below are used as a last resort
 * if no network settings can be found, and DHCP (if enabled) fails. You can
 * edit these as a quick-and-dirty way of changing network settings if desired.
 * 
 * Default IP addresses are set to all zeros so that DHCP server packets will
 * penetrate secure routers.  If DHCP will not be used, select valid static
 * IP addresses here, for example:
 *           IP: 192.168.1.234
 *      Gateway: 192.168.1.1
 *  Subnet Mask: 255.255.255.0
 */# define IPADDR0   192# define IPADDR1   168# define IPADDR2   1# define IPADDR3   234