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auto_player.v
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// Auto Player Top Module
`include "const.v"
module auto_player(
input clk, pause, // clock, pause
input [2:0] mode, // 011: auto
input [1:0] song_num, // 00: song1, 01: song2, 10: song3
output speaker, // pwm signal
output reg [7:0] led1 // control led
);
reg [1:0] last_song_num; // Last song number, used to reset cnt_note when song changes
reg [15:0] cnt_note, note_num; // Counter for notes in a song
reg [28:0] duration; // Duration Counter
reg [4:0] note, current; // Note and current note
reg [3:0] note_len; // Note length
reg [7:0] led;
parameter period = `CLK_FREQ; // Note period
parameter note_div = 9 * period / 10; // Note duration
buzzer buzzer(.clk(clk), .note(note), .speaker(speaker));
initial begin
cnt_note = 0;
note = 0;
duration = 0;
note_len = 1;
end
// Get the number of notes in a song when song changes
always @(posedge clk) begin
if(mode != `MODEAUTO) begin
note_num <= 0;
end else begin
case(song_num)
2'b00: note_num <= 48; // Little Star
2'b01: note_num <= 93; // Haruhigake
2'b10: note_num <= 62; // Ode to Joy
2'b11: note_num <= 76; // Jingle bell
endcase
end
end
// Count the number of notes played
always @(posedge clk) begin
if(pause) begin
cnt_note <= cnt_note;
duration <= 0;
end else if(mode != `MODEAUTO | song_num != last_song_num) begin
duration <= 0;
cnt_note <= 0;
last_song_num <= song_num;
end else begin
if(duration == period / note_len) begin
if(cnt_note == note_num) cnt_note <= 1;
else cnt_note <= cnt_note + 1;
duration <= 0;
end else begin
duration <= duration + 1;
end
end
end
// Play the note
always @(posedge clk) begin
if(pause) begin
note <= 0;
end else if(duration < note_div / note_len) begin
note <= current;
led1 <= led;
end else begin
note <= 0;
led1 <= 0;
end
end
// Song Sheet and control led
always @(song_num, cnt_note) begin
case(song_num)
2'b00: case(cnt_note) // Song 1: Twinkle Twinkle Little Star
'd1: begin current = 8; led = `LED0; note_len = 1; end
'd2: begin current = 8; led = `LED0; note_len = 1; end
'd3: begin current = 12; led = `LED4; note_len = 1; end
'd4: begin current = 12; led = `LED4; note_len = 1; end
'd5: begin current = 13; led = `LED5; note_len = 1; end
'd6: begin current = 13; led = `LED5; note_len = 1; end
'd7: begin current = 12; led = `LED4; note_len = 1; end
'd8: begin current = 0; led = `LEDM; note_len = 1; end
'd9: begin current = 11; led = `LED3; note_len = 1; end
'd10: begin current = 11; led = `LED3; note_len = 1; end
'd11: begin current = 10; led = `LED2; note_len = 1; end
'd12: begin current = 10; led = `LED2; note_len = 1; end
'd13: begin current = 9; led = `LED1; note_len = 1; end
'd14: begin current = 9; led = `LED1; note_len = 1; end
'd15: begin current = 8; led = `LED0; note_len = 1; end
'd16: begin current = 0; led = `LEDM; note_len = 1; end
'd17: begin current = 12; led = `LED4; note_len = 1; end
'd18: begin current = 12; led = `LED4; note_len = 1; end
'd19: begin current = 11; led = `LED3; note_len = 1; end
'd20: begin current = 11; led = `LED3; note_len = 1; end
'd21: begin current = 10; led = `LED2; note_len = 1; end
'd22: begin current = 10; led = `LED2; note_len = 1; end
'd23: begin current = 9; led = `LED1; note_len = 1; end
'd24: begin current = 0; led = `LEDM; note_len = 1; end
'd25: begin current = 12; led = `LED4; note_len = 1; end
'd26: begin current = 12; led = `LED4; note_len = 1; end
'd27: begin current = 11; led = `LED3; note_len = 1; end
'd28: begin current = 11; led = `LED3; note_len = 1; end
'd29: begin current = 10; led = `LED2; note_len = 1; end
'd30: begin current = 10; led = `LED2; note_len = 1; end
'd31: begin current = 9; led = `LED1; note_len = 1; end
'd32: begin current = 0; led = `LEDM; note_len = 1; end
'd33: begin current = 8; led = `LED0; note_len = 1; end
'd34: begin current = 8; led = `LED0; note_len = 1; end
'd35: begin current = 12; led = `LED4; note_len = 1; end
'd36: begin current = 12; led = `LED4; note_len = 1; end
'd37: begin current = 13; led = `LED5; note_len = 1; end
'd38: begin current = 13; led = `LED5; note_len = 1; end
'd39: begin current = 12; led = `LED4; note_len = 1; end
'd40: begin current = 0; led = `LEDM; note_len = 1; end
'd41: begin current = 11; led = `LED3; note_len = 1; end
'd42: begin current = 11; led = `LED3; note_len = 1; end
'd43: begin current = 10; led = `LED2; note_len = 1; end
'd44: begin current = 10; led = `LED2; note_len = 1; end
'd45: begin current = 9; led = `LED1; note_len = 1; end
'd46: begin current = 9; led = `LED1; note_len = 1; end
'd47: begin current = 8; led = `LED0; note_len = 1; end
'd48: begin current = 0; led = `LEDM; note_len = 1; end
default: begin current = 0; led = `LEDM; note_len = 1; end
endcase
2'b01: case(cnt_note) // Song 2: Haruhigake
'd1: begin current = 17; led = `LED2; note_len = 1; end
'd2: begin current = 16; led = `LED1; note_len = 2; end
'd3: begin current = 15; led = `LED0; note_len = 1; end
'd4: begin current = 16; led = `LED1; note_len = 2; end
'd5: begin current = 17; led = `LED2; note_len = 2; end
'd6: begin current = 18; led = `LED3; note_len = 4; end
'd7: begin current = 17; led = `LED2; note_len = 2; end
'd8: begin current = 16; led = `LED1; note_len = 1; end
'd9: begin current = 17; led = `LED2; note_len = 1; end
'd10: begin current = 16; led = `LED1; note_len = 2; end
'd11: begin current = 15; led = `LED0; note_len = 1; end
'd12: begin current = 16; led = `LED1; note_len = 2; end
'd13: begin current = 17; led = `LED2; note_len = 2; end
'd14: begin current = 18; led = `LED3; note_len = 4; end
'd15: begin current = 17; led = `LED2; note_len = 2; end
'd16: begin current = 16; led = `LED1; note_len = 1; end
'd17: begin current = 17; led = `LED2; note_len = 1; end
'd18: begin current = 16; led = `LED1; note_len = 2; end
'd19: begin current = 15; led = `LED0; note_len = 1; end
'd20: begin current = 16; led = `LED1; note_len = 2; end
'd21: begin current = 17; led = `LED2; note_len = 2; end
'd22: begin current = 18; led = `LED3; note_len = 4; end
'd23: begin current = 17; led = `LED2; note_len = 2; end
'd24: begin current = 16; led = `LED1; note_len = 1; end
'd25: begin current = 17; led = `LED2; note_len = 1; end
'd26: begin current = 16; led = `LED1; note_len = 2; end
'd27: begin current = 15; led = `LED0; note_len = 1; end
'd28: begin current = 16; led = `LED1; note_len = 2; end
'd29: begin current = 17; led = `LED2; note_len = 2; end
'd30: begin current = 18; led = `LED3; note_len = 4; end
'd31: begin current = 17; led = `LED2; note_len = 2; end
'd32: begin current = 16; led = `LED1; note_len = 1; end
'd33: begin current = 8; led = `LED0; note_len = 2; end
'd34: begin current = 8; led = `LED0; note_len = 2; end
'd35: begin current = 10; led = `LED2; note_len = 2; end
'd36: begin current = 10; led = `LED2; note_len = 2; end
'd37: begin current = 9; led = `LED1; note_len = 2; end
'd38: begin current = 11; led = `LED3; note_len = 2; end
'd39: begin current = 10; led = `LED2; note_len = 2; end
'd40: begin current = 9; led = `LED1; note_len = 2; end
'd41: begin current = 9; led = `LED1; note_len = 2; end
'd42: begin current = 9; led = `LED1; note_len = 2; end
'd43: begin current = 8; led = `LED0; note_len = 4; end
'd44: begin current = 8; led = `LED0; note_len = 4; end
'd45: begin current = 11; led = `LED3; note_len = 2; end
'd46: begin current = 10; led = `LED2; note_len = 2; end
'd47: begin current = 9; led = `LED1; note_len = 2; end
'd48: begin current = 9; led = `LED1; note_len = 1; end
'd49: begin current = 8; led = `LED0; note_len = 4; end
'd50: begin current = 9; led = `LED1; note_len = 4; end
'd51: begin current = 10; led = `LED2; note_len = 1; end
'd52: begin current = 0; led = `LEDM; note_len = 1; end
'd53: begin current = 10; led = `LED2; note_len = 2; end
'd54: begin current = 12; led = `LED4; note_len = 2; end
'd55: begin current = 15; led = `LED0; note_len = 2; end
'd56: begin current = 14; led = `LED6; note_len = 1; end
'd57: begin current = 15; led = `LED0; note_len = 2; end
'd58: begin current = 14; led = `LED6; note_len = 1; end
'd59: begin current = 15; led = `LED0; note_len = 2; end
'd60: begin current = 14; led = `LED6; note_len = 4; end
'd61: begin current = 13; led = `LED5; note_len = 4; end
'd62: begin current = 12; led = `LED4; note_len = 1; end
'd63: begin current = 12; led = `LED4; note_len = 2; end
'd64: begin current = 9; led = `LED1; note_len = 2; end
'd65: begin current = 11; led = `LED3; note_len = 2; end
'd66: begin current = 11; led = `LED3; note_len = 1; end
'd67: begin current = 10; led = `LED2; note_len = 2; end
'd68: begin current = 10; led = `LED2; note_len = 1; end
'd69: begin current = 5; led = `LED4; note_len = 2; end
'd70: begin current = 11; led = `LED3; note_len = 2; end
'd71: begin current = 10; led = `LED2; note_len = 2; end
'd72: begin current = 9; led = `LED1; note_len = 2; end
'd73: begin current = 10; led = `LED2; note_len = 1; end
'd74: begin current = 12; led = `LED4; note_len = 2; end
'd75: begin current = 8; led = `LED0; note_len = 1; end
'd76: begin current = 0; led = `LEDM; note_len = 1; end
'd77: begin current = 8; led = `LED0; note_len = 1; end
'd78: begin current = 9; led = `LED1; note_len = 2; end
'd79: begin current = 8; led = `LED0; note_len = 2; end
'd80: begin current = 7; led = `LED6; note_len = 4; end
'd81: begin current = 8; led = `LED1; note_len = 2; end
'd82: begin current = 12; led = `LED4; note_len = 2; end
'd83: begin current = 8; led = `LED1; note_len = 2; end
'd84: begin current = 11; led = `LED3; note_len = 1; end
'd85: begin current = 10; led = `LED2; note_len = 2; end
'd86: begin current = 9; led = `LED1; note_len = 2; end
'd87: begin current = 8; led = `LED0; note_len = 2; end
'd88: begin current = 8; led = `LED0; note_len = 2; end
'd89: begin current = 8; led = `LED0; note_len = 1; end
'd90: begin current = 8; led = `LED0; note_len = 1; end
'd91: begin current = 0; led = `LEDM; note_len = 2; end
'd92: begin current = 8; led = `LED0; note_len = 2; end
'd93: begin current = 9; led = `LED0; note_len = 2; end
default: begin current = 0; led = `LEDM; note_len = 1; end
endcase
2'b10: case(cnt_note) // Song 3: Ode to joy
'd1: begin current = 10; led = `LED2; note_len = 1; end
'd2: begin current = 10; led = `LED2; note_len = 1; end
'd3: begin current = 11; led = `LED3; note_len = 1; end
'd4: begin current = 12; led = `LED4; note_len = 1; end
'd5: begin current = 12; led = `LED4; note_len = 1; end
'd6: begin current = 11; led = `LED3; note_len = 1; end
'd7: begin current = 10; led = `LED2; note_len = 1; end
'd8: begin current = 9; led = `LED1; note_len = 1; end
'd9: begin current = 8; led = `LED0; note_len = 1; end
'd10: begin current = 8; led = `LED0; note_len = 1; end
'd11: begin current = 9; led = `LED1; note_len = 1; end
'd12: begin current = 10; led = `LED2; note_len = 1; end
'd13: begin current = 10; led = `LED2; note_len = 1; end
'd14: begin current = 9; led = `LED1; note_len = 2; end
'd15: begin current = 9; led = `LED1; note_len = 1; end
'd16: begin current = 10; led = `LED2; note_len = 1; end
'd17: begin current = 10; led = `LED2; note_len = 1; end
'd18: begin current = 11; led = `LED3; note_len = 1; end
'd19: begin current = 12; led = `LED4; note_len = 1; end
'd20: begin current = 12; led = `LED4; note_len = 1; end
'd21: begin current = 11; led = `LED3; note_len = 1; end
'd22: begin current = 10; led = `LED2; note_len = 1; end
'd23: begin current = 9; led = `LED1; note_len = 1; end
'd24: begin current = 8; led = `LED0; note_len = 1; end
'd25: begin current = 8; led = `LED0; note_len = 1; end
'd26: begin current = 9; led = `LED1; note_len = 1; end
'd27: begin current = 10; led = `LED2; note_len = 1; end
'd28: begin current = 9; led = `LED1; note_len = 1; end
'd29: begin current = 8; led = `LED0; note_len = 2; end
'd30: begin current = 8; led = `LED0; note_len = 1; end
'd31: begin current = 9; led = `LED1; note_len = 1; end
'd32: begin current = 9; led = `LED1; note_len = 1; end
'd33: begin current = 10; led = `LED2; note_len = 1; end
'd34: begin current = 8; led = `LED0; note_len = 1; end
'd35: begin current = 9; led = `LED1; note_len = 1; end
'd36: begin current = 10; led = `LED2; note_len = 2; end
'd37: begin current = 11; led = `LED3; note_len = 2; end
'd38: begin current = 10; led = `LED2; note_len = 1; end
'd39: begin current = 8; led = `LED0; note_len = 1; end
'd40: begin current = 9; led = `LED1; note_len = 1; end
'd41: begin current = 10; led = `LED2; note_len = 2; end
'd42: begin current = 11; led = `LED3; note_len = 2; end
'd43: begin current = 10; led = `LED2; note_len = 1; end
'd44: begin current = 9; led = `LED1; note_len = 1; end
'd45: begin current = 8; led = `LED0; note_len = 1; end
'd46: begin current = 9; led = `LED1; note_len = 1; end
'd47: begin current = 5; led = `LED4; note_len = 1; end
'd48: begin current = 10; led = `LED2; note_len = 1; end
'd49: begin current = 10; led = `LED2; note_len = 1; end
'd50: begin current = 11; led = `LED3; note_len = 1; end
'd51: begin current = 12; led = `LED4; note_len = 1; end
'd52: begin current = 12; led = `LED4; note_len = 1; end
'd53: begin current = 11; led = `LED3; note_len = 1; end
'd54: begin current = 10; led = `LED2; note_len = 1; end
'd55: begin current = 9; led = `LED1; note_len = 1; end
'd56: begin current = 8; led = `LED0; note_len = 1; end
'd57: begin current = 8; led = `LED0; note_len = 1; end
'd58: begin current = 9; led = `LED1; note_len = 1; end
'd59: begin current = 10; led = `LED2; note_len = 1; end
'd60: begin current = 9; led = `LED1; note_len = 1; end
'd61: begin current = 8; led = `LED0; note_len = 2; end
'd62: begin current = 8; led = `LED0; note_len = 1; end
default: begin current = 0; led = `LEDM; note_len = 1; end
endcase
2'b11: case(cnt_note)
'd1: begin current = 10; led = `LED2; note_len = 2; end
'd2: begin current = 10; led = `LED2; note_len = 2; end
'd3: begin current = 10; led = `LED2; note_len = 1; end
'd4: begin current = 10; led = `LED2; note_len = 2; end
'd5: begin current = 10; led = `LED2; note_len = 2; end
'd6: begin current = 10; led = `LED2; note_len = 1; end
'd7: begin current = 10; led = `LED0; note_len = 2; end
'd8: begin current = 12; led = `LED0; note_len = 2; end
'd9: begin current = 8; led = `LED0; note_len = 2; end
'd10: begin current = 9; led = `LED0; note_len = 4; end
'd11: begin current = 10; led = `LED0; note_len = 1; end
'd12: begin current = 11; led = `LED3; note_len = 2; end
'd13: begin current = 11; led = `LED3; note_len = 2; end
'd14: begin current = 11; led = `LED3; note_len = 2; end
'd15: begin current = 11; led = `LED3; note_len = 2; end
'd16: begin current = 11; led = `LED3; note_len = 2; end
'd17: begin current = 10; led = `LED2; note_len = 2; end
'd18: begin current = 10; led = `LED2; note_len = 2; end
'd19: begin current = 10; led = `LED2; note_len = 2; end
'd20: begin current = 12; led = `LED4; note_len = 2; end
'd21: begin current = 12; led = `LED4; note_len = 2; end
'd22: begin current = 11; led = `LED3; note_len = 2; end
'd23: begin current = 9; led = `LED1; note_len = 2; end
'd24: begin current = 8; led = `LED0; note_len = 1; end
'd25: begin current = 1; led = `LED0; note_len = 1; end
'd26: begin current = 5; led = `LED4; note_len = 2; end
'd27: begin current = 10; led = `LED2; note_len = 2; end
'd28: begin current = 9; led = `LED1; note_len = 2; end
'd29: begin current = 8; led = `LED0; note_len = 2; end
'd30: begin current = 5; led = `LED4; note_len = 1; end
'd31: begin current = 5; led = `LED4; note_len = 4; end
'd32: begin current = 5; led = `LED4; note_len = 4; end
'd33: begin current = 5; led = `LED4; note_len = 2; end
'd34: begin current = 10; led = `LED2; note_len = 2; end
'd35: begin current = 9; led = `LED1; note_len = 2; end
'd36: begin current = 8; led = `LED0; note_len = 2; end
'd37: begin current = 6; led = `LED5; note_len = 1; end
'd38: begin current = 6; led = `LED5; note_len = 1; end
'd39: begin current = 6; led = `LED5; note_len = 2; end
'd40: begin current = 11; led = `LED3; note_len = 2; end
'd41: begin current = 10; led = `LED2; note_len = 2; end
'd42: begin current = 9; led = `LED1; note_len = 2; end
'd43: begin current = 7; led = `LED6; note_len = 1; end
'd44: begin current = 5; led = `LED4; note_len = 1; end
'd45: begin current = 12; led = `LED4; note_len = 1; end
'd46: begin current = 11; led = `LED3; note_len = 2; end
'd47: begin current = 9; led = `LED1; note_len = 2; end
'd48: begin current = 10; led = `LED2; note_len = 1; end
'd49: begin current = 8; led = `LED0; note_len = 2; end
'd50: begin current = 5; led = `LED4; note_len = 2; end
'd51: begin current = 5; led = `LED4; note_len = 2; end
'd52: begin current = 10; led = `LED2; note_len = 2; end
'd53: begin current = 9; led = `LED1; note_len = 2; end
'd54: begin current = 8; led = `LED0; note_len = 2; end
'd55: begin current = 5; led = `LED4; note_len = 1; end
'd56: begin current = 5; led = `LED4; note_len = 2; end
'd57: begin current = 5; led = `LED4; note_len = 2; end
'd58: begin current = 10; led = `LED2; note_len = 2; end
'd59: begin current = 9; led = `LED1; note_len = 2; end
'd60: begin current = 8; led = `LED0; note_len = 2; end
'd61: begin current = 6; led = `LED5; note_len = 1; end
'd62: begin current = 6; led = `LED5; note_len = 2; end
'd63: begin current = 5; led = `LED4; note_len = 2; end
'd64: begin current = 11; led = `LED3; note_len = 2; end
'd65: begin current = 10; led = `LED2; note_len = 2; end
'd66: begin current = 9; led = `LED1; note_len = 2; end
'd67: begin current = 12; led = `LED4; note_len = 2; end
'd68: begin current = 12; led = `LED4; note_len = 2; end
'd69: begin current = 12; led = `LED4; note_len = 2; end
'd70: begin current = 12; led = `LED4; note_len = 2; end
'd71: begin current = 13; led = `LED5; note_len = 2; end
'd72: begin current = 12; led = `LED4; note_len = 2; end
'd73: begin current = 11; led = `LED3; note_len = 2; end
'd74: begin current = 9; led = `LED1; note_len = 2; end
'd75: begin current = 8; led = `LED0; note_len = 1; end
'd76: begin current = 0; led = `LEDM; note_len = 1; end
default: begin current = 0; led = `LEDM; note_len = 1; end
endcase
default: begin current = 0; led = `LEDM; end
endcase
end
endmodule