proc ad_dacfifo_create {dac_fifo_name dac_data_width dac_dma_data_width dac_fifo_address_width} {

  upvar ad_hdl_dir ad_hdl_dir

  create_bd_intf_port -mode Slave -vlnv xilinx.com:interface:diff_clock_rtl:1.0 sys_clk_c1
  set_property -dict [list CONFIG.FREQ_HZ {250000000}] [get_bd_intf_ports sys_clk_c1]

  create_bd_intf_port -mode Master -vlnv xilinx.com:interface:ddr4_rtl:1.0 ddr4_c1

  # instance: ddr4
  ad_ip_instance proc_sys_reset axi_rstgen_2
  ad_ip_instance ip:ddr4 axi_ddr_cntrl_c1
  ad_ip_parameter axi_ddr_cntrl_c1 CONFIG.C0_CLOCK_BOARD_INTERFACE default_250mhz_clk2
  ad_ip_parameter axi_ddr_cntrl_c1 CONFIG.C0_DDR4_BOARD_INTERFACE ddr4_sdram_c1
  ad_ip_parameter axi_ddr_cntrl_c1 CONFIG.RESET_BOARD_INTERFACE reset

  ad_connect sys_rst axi_ddr_cntrl_c1/sys_rst
  ad_connect sys_clk_c1 axi_ddr_cntrl_c1/C0_SYS_CLK
  ad_connect ddr4_c1 axi_ddr_cntrl_c1/C0_DDR4

  ad_ip_instance axi_dacfifo $dac_fifo_name
  ad_ip_parameter $dac_fifo_name CONFIG.DAC_DATA_WIDTH $dac_data_width
  ad_ip_parameter $dac_fifo_name CONFIG.DMA_DATA_WIDTH $dac_dma_data_width
  ad_ip_parameter $dac_fifo_name CONFIG.AXI_DATA_WIDTH 512
  ad_ip_parameter $dac_fifo_name CONFIG.AXI_SIZE 6
  ad_ip_parameter $dac_fifo_name CONFIG.AXI_LENGTH 255
  ad_ip_parameter $dac_fifo_name CONFIG.AXI_ADDRESS 0x80000000
  ad_ip_parameter $dac_fifo_name CONFIG.AXI_ADDRESS_LIMIT 0xbfffffff

  ad_connect  axi_ddr_cntrl_c1/C0_DDR4_S_AXI $dac_fifo_name/axi
  ad_connect  axi_ddr_cntrl_c1/c0_ddr4_ui_clk $dac_fifo_name/axi_clk
  ad_connect  axi_ddr_cntrl_c1/c0_ddr4_ui_clk axi_rstgen_2/slowest_sync_clk
  ad_connect  sys_cpu_resetn axi_rstgen_2/ext_reset_in
  ad_connect  axi_rstgen_2/peripheral_aresetn $dac_fifo_name/axi_resetn
  ad_connect  axi_rstgen_2/peripheral_aresetn axi_ddr_cntrl_c1/c0_ddr4_aresetn

  assign_bd_address [get_bd_addr_segs -of_objects [get_bd_cells axi_ddr_cntrl_c1]]
}