基于FGGA设计的音频录音与播放实验例程Verilog逻辑源码Quartus工程文件+文档说明,音频编解码芯片选用WOLFSON 公司的 WM8731 芯，FPGA型号Cyclone4E系列中的EP4CE6F17C8，Quartus版本17.1。 `timescale 1ps/1ps module top ( input clk, //clock input input rst_n, //reset input input key, //record play button input wm8731_bclk, //audio bit clock input wm8731_daclrc, //DAC sample rate left right clock output wm8731_dacdat, //DAC audio data output input wm8731_adclrc, //ADC sample rate left right clock input wm8731_adcdat, //ADC audio data input inout wm8731_scl, //I2C clock inout wm8731_sda, //I2C data output sdram_clk, //sdram clock output sdram_cke, //sdram clock enable output sdram_cs_n, //sdram chip select output sdram_we_n, //sdram write enable output sdram_cas_n, //sdram column address strobe output sdram_ras_n, //sdram row address strobe output[1:0] sdram_dqm, //sdram data enable output[1:0] sdram_ba, //sdram bank address output[12:0] sdram_addr, //sdram address inout[15:0] sdram_dq //sdram data ); parameter MEM_DATA_BITS = 16 ; //external memory user interface data width parameter ADDR_BITS = 24 ; //external memory user interface address width parameter BUSRT_BITS = 10 ; //external memory user interface burst width wire wr_burst_data_req; wire