module fifo_to_gpmc_async (input clk, input reset, input clear, input [17:0] data_i, input src_rdy_i, output dst_rdy_o, output [15:0] EM_D, input EM_NCS, input EM_NOE, input [15:0] frame_len); // Synchronize the async control signals reg [2:0] cs_del, oe_del; reg [15:0] counter; always @(posedge clk) if(reset) begin cs_del <= 3'b11; oe_del <= 3'b11; end else begin cs_del <= { cs_del[1:0], EM_NCS }; oe_del <= { oe_del[1:0], EM_NOE }; end wire do_read = ( (~cs_del[1] | ~cs_del[2]) & (oe_del[1:0] == 2'b01)); // change output on trailing edge wire first_read = (counter == 0); wire last_read = ((counter+1) == frame_len); assign EM_D = data_i[15:0]; assign dst_rdy_o = do_read; endmodule // fifo_to_gpmc_async