Spliting i2s transceiver in to two modules

i2s sender and i2s receiver.
Also add JXADC_controler for logic analizer.

i2s_sender.v

@@ -0,0 +1,96 @@
+// This I2S Playback design uses the common 44.1 kHz 
+// sampling frequency.  
+// From Figure 2 in Section 4.1.1 of the CS5343 
+// Datasheet, it is appropriate to use an SCLK/LRCK 
+// ratio of 64 and a MCLK/LRCK ratio of 256.  
+// Therefore, the I2S Transceiver’s generic 
+// parameter sclk_ws_ratio is set to 64.  
+// (LRCK, e.g. left-right clock, and ws, 
+// e.g. word select, are synonymous.)  
+// The generic parameter mclk_sclk_ratio is set to 4, 
+// since MCLK/SCLK = (MCLK/LRCK) / (SCLK/LRCK) = 256/64 = 4.
+//
+// As such, the word select (or left-right clock) frequency 
+// is 44.1 kHz, the serial clock frequency is 44.1 kHz * 64 = 2.82 MHz, 
+// and the master clock frequency is 2.82 MHz * 4 = 11.29 MHz.  
+// Table 1, Section 4.1 of the CS4344 Datasheet confirms this 
+// selection, listing 11.29 MHz as a common frequency 
+// for the master clock when the LRCK is 44.1 kHz.
+//
+//  Module is created from sample provided by 
+//  Digilent
+//
+
+
+module i2s_sender #( parameter
+    sclk_ws_ratio = 64,         // number of sclk periods per word select period
+    mclk_sclk_ratio = 4,        // number of mclk periods per sclk period
+    d_width = 24                // data width
+)(
+    input  reset_n,                             //asynchronous active low reset
+    input  mclk,                                //master clock
+    output sclk,                                //serial clock (or bit clock)
+    output ws,                                  //word select (or left-right clock)
+    output reg sd_tx,                               //serial data transmit
+    input signed [d_width-1: 0] l_data_tx,            //left channel data to transmit
+    input signed [d_width-1: 0] r_data_tx            //right channel data to transmit
+    );
+
+reg sclk_int = 0;                       //internal serial clock wire
+reg ws_int = 0;                         //internal word select wire
+reg signed [d_width-1: 0] l_data_tx_int = 'sb0;   //internal left channel tx data buffer
+reg signed [d_width-1: 0] r_data_tx_int = 'sb0;   //internal right channel tx data buffer
+
+reg r_sd_tx = 0;                        //internal register 
+
+
+reg [2: 0] sclk_cnt = 0;  //counter of master clocks during half period of serial clock
+reg [7: 0] ws_cnt   = 0;  //counter of serial clock toggles during half period of word select
+
+
+
+always@(posedge mclk, posedge reset_n) begin
+
+    if (reset_n == 1) begin
+        sclk_cnt <= 'b0;                 //clear mclk/sclk counter
+        ws_cnt <= 'b0;                   //clear sclk/ws counter
+        sclk_int <= 0;                   //clear serial clock signal
+        ws_int <= 0;                     //clear word select signal
+        l_data_tx_int <= 'sb0;           //clear internal left channel tx data buffer
+        r_data_tx_int <= 'sb0;           //clear internal right channel tx data buffer
+        r_sd_tx <= 0;                    //clear serial data transmit output
+    end
+    else begin                          //master clock rising edge
+        if (sclk_cnt < mclk_sclk_ratio/2-1) begin   //less than half period of sclk
+            sclk_cnt <= sclk_cnt + 1;               //increment mclk/sclk counter
+        end
+        else begin                                  //half period of sclk
+            sclk_cnt <= 0;                          //reset mclk/sclk counter
+            sclk_int <= ~sclk_int;                  //toggle serial clock
+            if (ws_cnt < sclk_ws_ratio - 1) begin   //less than half period of ws
+                ws_cnt <= ws_cnt + 1;               //increment sclk/ws counter
+                
+                if (sclk_int == 1 && ws_cnt > 1 && ws_cnt < d_width*2+3) begin      //falling edge of sclk during data word
+                    if (ws_int == 1) begin                                          //right channel
+                        sd_tx <= r_data_tx_int[d_width-1];                        //transmit serial data bit
+                        r_data_tx_int <= {r_data_tx_int[d_width-2 : 0] , 1'b0};     //shift data of right channel tx data buffer
+                    end else begin                                                  //left channel
+                        sd_tx <= l_data_tx_int[d_width-1];                        //ransmit serial data bit
+                        l_data_tx_int <= {l_data_tx_int[d_width-2 : 0] , 1'b0};     //shift data of left channel tx data buffer
+                    end
+                end 
+            end else begin                          //half period of ws
+                ws_cnt <= 0;                        //reset sclk/ws counter
+                ws_int <= ~ws_int;                  //toggle word select
+                r_data_tx_int <= r_data_tx;
+                l_data_tx_int <= l_data_tx;
+            end
+        end
+    end
+end
+
+assign sclk = sclk_int;             //output serial clock
+assign ws = ws_int;                 //output word select
+//assign sd_tx = r_sd_tx;             //assign sd_tx
+
+endmodule