XMEGA EBI Base Address

#define CONFIG_HAVE_HUGEMEM

//! Base address of SDRAM on board

#define BOARD_EBI_SDRAM_BASE    0x800000UL

//! Size of SDRAM on board, given in bytes.

#define BOARD_EBI_SDRAM_SIZE    0x800000UL

static void InitSDRAM(void) {

  /*

   * Configure the EBI port with 12 address lines, no address latches or

   * low pin count, and set it in SDRAM mode with 3-port EBI port.

   */

  ebi_setup_port(12, 0, 0, EBI_PORT_3PORT | EBI_PORT_SDRAM);

  /*

   * Configure the EBI chip select for an 8 MB SDRAM located at

   * \ref BOARD_EBI_SDRAM_BASE.

   */

  ebi_cs_set_mode(&cs_config, EBI_CS_MODE_SDRAM_gc);

  ebi_cs_set_address_size(&cs_config, EBI_CS_ASIZE_8MB_gc);

  ebi_cs_set_base_address(&cs_config, BOARD_EBI_SDRAM_BASE);

  /* Configure the EBI chip select to be in SDRAM mode. */

  ebi_sdram_set_mode(&cs_config, EBI_CS_SDMODE_NORMAL_gc);

  /* Setup the number of SDRAM rows and columns. */

  ebi_sdram_set_row_bits(&sdram_config, 12);

  ebi_sdram_set_col_bits(&sdram_config, 10);

  /* Further, setup the SDRAM timing. */

  ebi_sdram_set_cas_latency(&sdram_config, 3);

  ebi_sdram_set_mode_delay(&sdram_config, EBI_MRDLY_2CLK_gc);

  ebi_sdram_set_row_cycle_delay(&sdram_config, EBI_ROWCYCDLY_7CLK_gc);

  ebi_sdram_set_row_to_precharge_delay(&sdram_config, EBI_RPDLY_7CLK_gc);

  ebi_sdram_set_write_recovery_delay(&sdram_config, EBI_WRDLY_1CLK_gc);

  ebi_sdram_set_self_refresh_to_active_delay(&sdram_config,

      EBI_ESRDLY_7CLK_gc);

  ebi_sdram_set_row_to_col_delay(&sdram_config, EBI_ROWCOLDLY_7CLK_gc);

  ebi_sdram_set_refresh_period(&sdram_config, BOARD_EBI_SDRAM_REFRESH);

  ebi_sdram_set_initialization_delay(&sdram_config,

      BOARD_EBI_SDRAM_INITDLY);

  /* Write SDRAM configuration into the EBI registers. */

  ebi_sdram_write_config(&sdram_config);

  /* Write the chip select configuration into the EBI registers. */

  ebi_cs_write_config(EBI_SDRAM_CS, &cs_config);

  ebi_enable_cs(EBI_SDRAM_CS, &cs_config);

  do {

    // Wait for SDRAM to initialize.

  } while (!ebi_sdram_is_ready());

  /* Debug: Enable LED1: SDRAM is ready. */

  LED_PORT.OUTCLR = OLED1;

    _delay_ms(100);

  LED_PORT.OUTSET = OLED1;

}