#### PCB焊接、调试

 * ADC板的焊接完成

{{ :adc焊接.jpg |}}

 * FPGA焊接完成

{{ :fpga焊接.jpg |}}


#### FPGA连接和Verilog编程

 * FPGA控制衰减放大电路



<code verilog>
module Range_selection (
/*input range1_5mv_200mv,
input range2_200mv_800mv,
input range3_800mv_3v,
input range4_3v_8v,
input range5_8v_10v,*/
output reg TMU_SEL1,
output reg TMU_SEL2,
output reg TSA_IN1,
output reg TSA_IN2,
output CH1_DC
);
assign CH1_DC = 1;
assign range1_5mv_200mv = 0;
assign range2_200mv_800mv = 0;
assign range3_800mv_3v = 0;
assign range4_3v_8v = 0;
assign range5_8v_10v = 1;

always @ (*) begin
		if (range1_5mv_200mv) begin    //不衰减且放大20倍
							TMU_SEL1 = 1'b1;
							TMU_SEL2 = 1'b0;
							TSA_IN1  = 1'b0;
							TSA_IN2  = 1'b0;
						end
		else	if (range2_200mv_800mv) begin  //衰减40倍且放大20倍
							TMU_SEL1 <= 1'b0;
							TMU_SEL2 <= 1'b1;
							TSA_IN1 <= 1'b0;
							TSA_IN2 <= 1'b0;
						  end
		else	if (range3_800mv_3v) begin     //衰减40倍且放大5倍
							TMU_SEL1 <= 1'b0;
							TMU_SEL2 <= 1'b1;
							TSA_IN1 <= 1'b1;
							TSA_IN2 <= 1'b0;	
					   end
		else	if (range4_3v_8v) begin    //衰减40倍且放大2倍
							TMU_SEL1 <= 1'b0;
							TMU_SEL2 <= 1'b1;
							TSA_IN1 <= 1'b0;
							TSA_IN2 <= 1'b1;
						end
		else	if(range5_8v_10v) begin    //衰减40倍且放大1.5倍
							TMU_SEL1 <= 1'b1;
							TMU_SEL2 <= 1'b0;
							TSA_IN1 <= 1'b1;
							TSA_IN2 <= 1'b1;
						end
end
endmodule
							
							
							
</code>



 * ADC采集

<code verilog>
module ceshiadc
(
	input  clk_in,
	//input rst_in,
	output  reg clkp,
	output reg clkm,
	input  [7:0] data_a,
	input dclka_in,
	//input dora,
	input  [7:0] data_b,
	input dclkb_in,
	//input dorb,
	output reg [7:0] display_a,
	output reg [7:0] display_b
);

	
	always @(*)
		begin
		clkp = clk_in;
	 clkm = ~clk_in;
	 end
	 
 always@(posedge dclka_in )
	begin
	//if(!rst_in)
	//begin
	//display_a <= 8'b0;
	//display_b <= 8'b0;
	//end
	//else 
	display_a <= data_a;
	end
	
 always@(posedge dclkb_in )
	begin
	//if(!rst_in)
	//display_b <= 8'b0;
	//else 
	display_b <= data_b;
	end
endmodule

</code>