?? music_note_a_440hz.v
字號:
// music_note_A_440HZ.v
/*8**********************************************************************
"A" note (440Hz)
Ok, better than a random frequency, why not try to get a 440Hz signal. That's
the frequency of the "A" note.
Instead of dividing 25MHz by 65536, we need to divide by 56818. Here we go.
***************************************************************************/
module music_note_A_440HZ(
clk,
speaker
);
input clk;
output speaker;
reg [15:0] counter;
always @(posedge clk) if(counter==56817) counter <= 0; else counter <= counter+1;
assign speaker = counter[15];
endmodule
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