module PF1(
			clk,rst_n,
			S_PF,
			SCLK,
			SEN,
			SDATA,	
		);

input clk;		//50MHz
input rst_n;	//低电平复位信号
input SCLK;
input SEN;
input SDATA;

output[47:0] S_PF;     

reg[21:0] cnt;
reg[5:0] timer;
reg[47:0] S_PFr;
reg[6:0] i;
reg[47:0] S_PFr2;

//always @ (posedge clk or negedge rst_n)
//	if(!rst_n) cnt <= 18'd0;
//	else 
//	begin
//     cnt <= cnt+1'b1;
//     if(cnt == 5001) cnt <= 0;
//	end

reg r_data_in0;
reg o_rising_edge;

 always@(posedge clk or negedge rst_n) 
begin
  if (!rst_n) 
    r_data_in0 <= 0;
  else begin
    r_data_in0 <= SCLK;
   if ({r_data_in0, SCLK} == 2'b01)
     o_rising_edge <= 1;    
   else
     o_rising_edge <= 0;
  end   
end



always @ (posedge clk)
  if(cnt<20'hfffff)
       begin
         cnt <= cnt + 1'b1;
       end
  else if (timer<60)
     begin
       cnt <= 0;
       timer <= timer + 1'b1; 
       S_PFr2 <= 48'hffffffffffff;
       end
  else
       begin
       S_PFr2 <= S_PFr;
       end
      				
always @ (posedge SCLK)
    if (!SEN)
    begin
       i <= 0;
    end   
	else 
    if(timer==60)
       begin
         i <= i+1'b1; 
         S_PFr[i] <= SDATA;  
   /*      case(i)
         6'd0:  S_PFr[0] <= SDATA;
         6'd1:  S_PFr[1] <= SDATA; 
         6'd2:  S_PFr[2] <= SDATA;
         6'd3:  S_PFr[3] <= SDATA;
         6'd4:  S_PFr[4] <= SDATA;
         6'd5:  S_PFr[5] <= SDATA;
         6'd6:  S_PFr[6] <= SDATA;
         6'd7:  S_PFr[7] <= SDATA;
         6'd8:  S_PFr[8] <= SDATA;
         6'd9:  S_PFr[9] <= SDATA;
         6'd10: S_PFr[10] <= SDATA;
         6'd11: S_PFr[11] <= SDATA;
         6'd12: S_PFr[12] <= SDATA;
         6'd13: S_PFr[13] <= SDATA;
         6'd14: S_PFr[14] <= SDATA;
         6'd15: S_PFr[15] <= SDATA;
         6'd16: S_PFr[16] <= SDATA;
         6'd17: S_PFr[17] <= SDATA;
         6'd18: S_PFr[18] <= SDATA;
         6'd19: S_PFr[19] <= SDATA;
         6'd20: S_PFr[20] <= SDATA;
         6'd21: S_PFr[21] <= SDATA;
         6'd22: S_PFr[22] <= SDATA;
         6'd23: S_PFr[23] <= SDATA;
         6'd24: S_PFr[24] <= SDATA;
         6'd25: S_PFr[25] <= SDATA;
         6'd26: S_PFr[26] <= SDATA;
         6'd27: S_PFr[27] <= SDATA;
         6'd28: S_PFr[28] <= SDATA;
         6'd29: S_PFr[29] <= SDATA; 
         6'd30: S_PFr[30] <= SDATA;
         6'd31: S_PFr[31] <= SDATA;
         6'd32: S_PFr[32] <= SDATA;
         6'd33: S_PFr[33] <= SDATA; 
         6'd34: S_PFr[34] <= SDATA;
         6'd35: S_PFr[35] <= SDATA;
         6'd36: S_PFr[36] <= SDATA;
         6'd37: S_PFr[37] <= SDATA;
         6'd38: S_PFr[38] <= SDATA; 
         6'd39: S_PFr[39] <= SDATA;
         6'd40: S_PFr[40] <= SDATA;
         6'd41: S_PFr[41] <= SDATA; 
         6'd42: S_PFr[42] <= SDATA;
         6'd43: S_PFr[43] <= SDATA;
         6'd44: S_PFr[44] <= SDATA;
         6'd45: S_PFr[45] <= SDATA;
         6'd46: S_PFr[46] <= SDATA; 
         6'd47: S_PFr[47] <= SDATA;
         default: ; 
         endcase*/
         end   
      
        
    
/*always @ (negedge SEN or negedge rst_n)
   if(!rst_n) S_PFr2 <= 48'hffffffffffff;
   else if(!SEN)
    begin   
    S_PFr2 <= S_PFr;
    end 
   */     
//	else if(cnt == 5000)
//	begin
//	  timer <= timer+1'b1;	//每0.1ms增一
//      if(!SEN) 
//      begin
//        case(timer)
//               1: S_PFr2 <= S_PFr; 
//               17: timer <= 1'b0;
//          default: ;
//        endcase		
//      end
//    end  
    
assign S_PF = S_PFr2;
    
endmodule