module beep_circuit(
    input           sys_clk     ,
    input           sys_rst_n   ,
    input   [1: 0]  dev_id      ,
    input   [3: 0]  opcode      ,
    input   [3: 0]  data        ,

    output          beep
);
wire  pwm;

freq_select freq_select_inst(
.sys_clk        (sys_clk),
.sys_rst_n      (sys_rst_n),
.dev_id         (dev_id),
.opcode         (opcode),  
.data           (data),
.pwm            (pwm)
);

pwm_beep    pwm_beep_inst(
.sys_clk        (sys_clk),
.sys_rst_n      (sys_rst_n),
.pwm            (pwm),

.beep           (beep)
);
endmodule