I am trying to transmit a square wave in I2S for the CS4334 DAC, but I do not understand the timing behind it. The code I have so far doze not work.
Music.v
module Music(input wire clk, output reg SDATA, output reg SCLK, output reg LRCK, output reg MCLK, output reg[7:0] debugs);
reg[23:0] PCM[0:4];
initial begin
$readmemh ("pcm.mem", PCM);
end
reg[31:0] Mcounter; //Master Clock Counter
reg[31:0] Scounter; //Serial Clock Counter
reg[31:0] Lcounter; //Channel Counter
always @ (posedge clk ) begin //50000000 hertz
//Create MCLK
if(Mcounter == 195) begin
Mcounter <= 0;
MCLK <= !MCLK;
end else begin
Mcounter <= Mcounter + 1;
end
//Create SCLK
if(Scounter == 2083) begin
Scounter <= 0;
SCLK <= ~SCLK;
end else begin
Scounter <= Scounter + 1;
end
//Create LCLK
if(Lcounter == 50000) begin
Lcounter <= 0;
LRCK <= ~LRCK;
end else begin
Lcounter <= Lcounter + 1;
end
end
reg[31:0] byte;
reg[7:0] serialBit;
reg[23:0] tmp;
//Serial Signal Generator
always @ (negedge SCLK) begin
if(serialBit == 23) begin
serialBit <= 0;
if(byte == 4) begin
byte <= 0;
end else begin
byte <= byte + 1;
end
end else begin
serialBit <= serialBit;
end
SDATA <= ((tmp & (1 << serialBit)) >> serialBit);
end
always @ (*) begin
tmp = PCM[byte];
end
endmodulepcm.mem
FFFFFF FFFFFF 000000 000000Is there any documentation about I2S.
Sorry if this question is posted in the incorrect spot because I did not know where to post it.
