题解 | 使用函数实现数据大小端转换

`timescale 1ns/1ns
module function_mod(
	input [3:0]a,
	input [3:0]b,
	
	output [3:0]c,
	output [3:0]d
);

turn turn_a(a,c);
turn turn_b(b,d);
endmodule

module turn(
	input [3:0] a,
	output [3:0] c
);
 
genvar  i;
generate
for (i = 0; i < 4; i = i + 1) begin: reverse
	assign c[i] = a[3-i];
end
endgenerate 
endmodule

`timescale 1ns/1ns
module function_mod(
	input [3:0]a,
	input [3:0]b,
	
	output [3:0]c,
	output [3:0]d
);

function [3:0] rev;
	input [3:0] in;
	integer i;
		for (i=0; i<4;i=i+1) begin
			rev[i] = in[3-i];
		end
endfunction


assign c=rev(a);
assign d=rev(b);


endmodule