verilog:wire iCEB=((BIST_i===1) ? CEBM_i : ((BIST_i===0)?CEB_i : 1’bx))
时间: 2024-05-25 09:12:07 浏览: 99
这是一段 Verilog 代码,定义了一个 wire 类型的信号 iCEB。这个信号的值根据 BIST_i 的值来确定:
- 如果 BIST_i 等于 1,则 iCEB 的值为 CEBM_i。
- 如果 BIST_i 等于 0,则 iCEB 的值为 CEB_i。
- 如果 BIST_i 不等于 0 或 1,则 iCEB 的值为 1’bx,表示未知。
这段代码使用了条件运算符 (?:) 来实现根据条件选择不同的值。其中,问号前面的表达式是条件,如果为真,则取冒号前面的值,否则取冒号后面的值。这种写法可以使代码更加简洁。
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module seg( input wire clk , //100MHz input wire rst_n , //low valid input wire [9:0] data_in , //待显示数据 output reg [6:0] hex1 , // -共阳极,低电平有效 output reg [6:0] hex2 , // - output reg [6:0] hex3 // - ); //parameter define localparam NUM_0 = 8'b1100_0000, NUM_1 = 8'b1111_1001, NUM_2 = 8'b1010_0100, NUM_3 = 8'b1011_0000, NUM_4 = 8'b1001_1001, NUM_5 = 8'b1001_0010, NUM_6 = 8'b1000_0010, NUM_7 = 8'b1111_1000, NUM_8 = 8'b1000_0000, NUM_9 = 8'b1001_0000, NUM_A = 8'b1000_1000, NUM_B = 8'b1000_0011, NUM_C = 8'b1100_0110, NUM_D = 8'b1010_0001, NUM_E = 8'b1000_0110, NUM_F = 8'b1000_1110, ALL_LIGHT = 8'b0000_0000, LIT_OUT = 8'b1111_1111; //reg 、wire define reg [3:0] cm_hund ;//100cm reg [3:0] cm_ten ;//10cm reg [3:0] cm_unit ;//1cm always @(posedge clk or negedge rst_n)begin if(!rst_n)begin cm_hund <= 'd0; cm_ten <= 'd0; cm_unit <= 'd0; end else begin cm_hund <= data_in / 10 ** 5; cm_ten <= data_in / 10 ** 4 % 10; cm_unit <= data_in / 10 ** 3 % 10; end end always @(posedge clk or negedge rst_n)begin if(!rst_n)begin hex1 <= ALL_LIGHT; hex2 <= ALL_LIGHT; hex3 <= ALL_LIGHT; end else begin hex1 <= hex_data(cm_unit); hex2 <= hex_data(cm_ten); hex3 <= hex_data(cm_hund); end end //always end function [6:0] hex_data; //函数不含时序逻辑相关 input [03:00] data_i;//至少一个输入 begin case(data_i) 'd0:hex_data = NUM_0; 'd1:hex_data = NUM_1; 'd2:hex_data = NUM_2; 'd3:hex_data = NUM_3; 'd4:hex_data = NUM_4; 'd5:hex_data = NUM_5; 'd6:hex_data = NUM_6; 'd7:hex_data = NUM_7; 'd8:hex_data = NUM_8; 'd9:hex_data = NUM_9; default:hex_data = ALL_LIGHT; endcase end endfunction endmodule
这是一个Verilog代码模块,用于将输入的十进制数字转换为三个七段数码管的显示,其中包括一个时序逻辑相关的always块和一个不含时序逻辑相关的函数hex_data。在时序逻辑相关的always块中,使用一个三位数字将输入数据进行分离,并将对应的七段数码管的显示码存储到对应的寄存器中。在函数hex_data中,使用case语句将输入的四位数字转换为对应的七段数码管的显示码。
module seg( input wire clk , //100MHz input wire rst_n , //low valid input wire [9:0] data_in , //待显示数据 output reg [6:0] hex1 , // -共阳极,低电平有效 output reg [6:0] hex2 , // - output reg [6:0] hex3 // - ); //parameter define localparam NUM_0 = 8'b1100_0000, NUM_1 = 8'b1111_1001, NUM_2 = 8'b1010_0100, NUM_3 = 8'b1011_0000, NUM_4 = 8'b1001_1001, NUM_5 = 8'b1001_0010, NUM_6 = 8'b1000_0010, NUM_7 = 8'b1111_1000, NUM_8 = 8'b1000_0000, NUM_9 = 8'b1001_0000, NUM_A = 8'b1000_1000, NUM_B = 8'b1000_0011, NUM_C = 8'b1100_0110, NUM_D = 8'b1010_0001, NUM_E = 8'b1000_0110, NUM_F = 8'b1000_1110, ALL_LIGHT = 8'b0000_0000, LIT_OUT = 8'b1111_1111; //reg 、wire define reg [3:0] cm_hund ;//100cm reg [3:0] cm_ten ;//10cm reg [3:0] cm_unit ;//1cm always @(posedge clk or negedge rst_n)begin if(!rst_n)begin cm_hund <= 'd0; cm_ten <= 'd0; cm_unit <= 'd0; end else begin cm_hund <= data_in / 10 ** 5; cm_ten <= data_in / 10 ** 4 % 10; cm_unit <= data_in / 10 ** 3 % 10; end end always @(posedge clk or negedge rst_n)begin if(!rst_n)begin hex1 <= ALL_LIGHT; hex2 <= ALL_LIGHT; hex3 <= ALL_LIGHT; end else begin hex1 <= hex_data(cm_unit); hex2 <= hex_data(cm_ten); hex3 <= hex_data(cm_hund); end end //always end function [6:0] hex_data; //函数不含时序逻辑相关 input [03:00] data_i;//至少一个输入 begin case(data_i) 'd0:hex_data = NUM_0; 'd1:hex_data = NUM_1; 'd2:hex_data = NUM_2; 'd3:hex_data = NUM_3; 'd4:hex_data = NUM_4; 'd5:hex_data = NUM_5; 'd6:hex_data = NUM_6; 'd7:hex_data = NUM_7; 'd8:hex_data = NUM_8; 'd9:hex_data = NUM_9; default:hex_data = ALL_LIGHT; endcase end endfunction endmodule
这段代码是一个 Verilog HDL 实现的模块,用于将输入的数据转换为数码管上的数字进行显示。模块输入包括时钟信号、复位信号和待显示的数据,输出则是三个七段数码管的数字。其中使用了一个函数 hex_data,用于将输入的十进制数字转换为对应的七段数码管控制信号。在 always 块中,根据输入的数据进行分解,得到百位、十位和个位的数字,并将它们分别转换为对应的七段数码管控制信号,输出到数码管上进行显示。这段代码的实现中,使用了 Verilog HDL 的模块化设计方法,将不同的功能模块划分到不同的 always 块中,便于后续的维护和调试。
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