边缘检测电路的(SOC)(Verilog)(10)

边缘检测电路的硬件实现,用的是Verilog语言,采用的是原理图输入,给出了源代码,对于采用FPGA做图像预处理有着很好的参考价值

1 /*

2 (C) OOMusou 2008

3

4 Filename : doubleedge_detection2.v

5 Compiler : Quartus II 7.2 SP3

6 Description : Demo how to design double edge detection circuit 7 Release : 07/06/2008 1.0

8 */

9

10 module doubleedge_detection2 (

11 input clk,

12 input rst_n,

13 input i_data_in,

14 output reg o_double_edge

15 );

16

17 reg r_data_in0;

18

19 always@(posedge clk, negedge rst_n) begin

20 if (!rst_n)

21 r_data_in0 <= 0;

22 else begin

23 r_data_in0 <= i_data_in;

24

25 if ({r_data_in0, i_data_in} == 2'b10)

26 o_double_edge <= 1;

27 else if ({r_data_in0, i_data_in} == 2'b01)

28 o_double_edge <= 1;

29 else

30 o_double_edge <= 0;

31

32 // another method

33 // o_double_edge <= r_data_in0 ^ i_data_in;

34 end

35 end

36

37 endmodule