ADC081S101_dirver
作者:互联网
module ADC081S101_dirver ( input clk, //系统时钟 input rst_n, //系统复位,低有效 output reg adc_cs, //SPI总线CS output reg adc_clk, //SPI总线SCK input adc_dat, //SPI总线SDA output reg adc_done, //ADC采样完成标志 output reg [7:0] adc_data //ADC采样数据 ); localparam HIGH = 1'b1; localparam LOW = 1'b0; reg [7:0] cnt; //采样计数器 always@(posedge clk or negedge rst_n) if(!rst_n) cnt <= 8'd0; else if(cnt >= 8'd34) cnt <= 8'd0; else cnt <= cnt + 8'd1; reg [7:0] data;//数据缓存 always@(posedge clk or negedge rst_n) if(!rst_n) begin adc_cs <= HIGH; adc_clk <= HIGH; end else case(cnt) 8'd0 : begin adc_cs <= HIGH; adc_clk <= HIGH; end 8'd1 : begin adc_cs <= LOW ; adc_clk <= HIGH; end 8'd2,8'd4,8'd6,8'd8,8'd10,8'd12,8'd14,8'd16, 8'd18,8'd20,8'd22,8'd24,8'd26,8'd28,8'd30,8'd32: begin adc_cs <= LOW; adc_clk <= LOW; end 8'd3 : begin adc_cs <= LOW; adc_clk <= HIGH; end //0 8'd5 : begin adc_cs <= LOW; adc_clk <= HIGH; end //1 8'd7 : begin adc_cs <= LOW; adc_clk <= HIGH; end //2 8'd9 : begin adc_cs <= LOW; adc_clk <= HIGH; data[7] <= adc_dat; end //3 8'd11 : begin adc_cs <= LOW; adc_clk <= HIGH; data[6] <= adc_dat; end //4 8'd13 : begin adc_cs <= LOW; adc_clk <= HIGH; data[5] <= adc_dat; end //5 8'd15 : begin adc_cs <= LOW; adc_clk <= HIGH; data[4] <= adc_dat; end //6 8'd17 : begin adc_cs <= LOW; adc_clk <= HIGH; data[3] <= adc_dat; end //7 8'd19 : begin adc_cs <= LOW; adc_clk <= HIGH; data[2] <= adc_dat; end //8 8'd21 : begin adc_cs <= LOW; adc_clk <= HIGH; data[1] <= adc_dat; end //9 8'd23 : begin adc_cs <= LOW; adc_clk <= HIGH; data[0] <= adc_dat; end //10 8'd25 : begin adc_cs <= LOW; adc_clk <= HIGH; adc_data <= data; end //11 8'd27 : begin adc_cs <= LOW; adc_clk <= HIGH; adc_done <= HIGH; end //12 8'd29 : begin adc_cs <= LOW; adc_clk <= HIGH; adc_done <= LOW ; end //13 8'd31 : begin adc_cs <= LOW; adc_clk <= HIGH; end //14 8'd33 : begin adc_cs <= LOW; adc_clk <= HIGH; end //15 8'd34 : begin adc_cs <= HIGH; adc_clk <= HIGH; end default: begin adc_cs <= HIGH; adc_clk <= HIGH; end endcase endmodule
标签:cnt,ADC081S101,dirver,clk,adc,rst,output,reg 来源: https://www.cnblogs.com/54programer/p/16696205.html