MMC/rtl/demodulation/clk_fm_demodulation.v

module clk_fm_demo_sample_pwm #(
    parameter BPS_PARA = 10 )  //400Khz/BPS_PARA = audio samping rate. BPS_PARA=20: 20kHz
    (
    input FM_demod_en,
    input EOC,
    input RSTn,
    output reg clk_fm_demo_sampling
);

    reg [5:0] cnt = 0;
    always @ (posedge EOC or negedge RSTn) begin
        if(~RSTn) cnt <= 6'b0;
        else if (~FM_demod_en) begin
            if((cnt >= BPS_PARA-1)||(FM_demod_en)) begin
                cnt                  <= 6'b0;
                clk_fm_demo_sampling <= 1'b1;
            end
            else begin cnt <= cnt + 1'b1;clk_fm_demo_sampling <= 1'b0; end
        end
        else clk_fm_demo_sampling <= 1'b0;
    end

endmodule