VerilogHDL流水灯设计讲课稿

V e r i l o g H D L流水灯

设计

大规模数字逻辑题目：流水灯控制

专业电子信息科学与技术

班级

学号

学生姓名

设计时间

教师评分

2013年 12 月 10 日

目录

一、概述 0

二、设计目的 0

三、设计内容 0

四、设计原理图 (1)

五、引脚分配情况 (1)

六、源程序代码 (1)

VerilogHDL 程序： (1)

分频器部分： (4)

七、心得体会 (5)

八、参考文献 (6)

一、概述

流水灯是一串按一定的规律像流水一样连续闪亮，流水灯控制是可编程控制器的一个应用，其控制思想在工业控制技术领域也同样适用。流水灯控制可用多种方法实现，但对现代可编程控制器而言，基于EDA技术的流水灯设计也是很普遍的。

二、设计目的

1、熟悉利用Quartus II 开发数字电路的基本流程和Quartus II 软件的相关操作。

2、掌握基本的设计思路，软件环境参数配置，仿真，管脚分配，利用JTAG/AS进行下载等基本操作。

3、了解VerilogHDL 语言设计或原理图设计方法。

4、通过本此设计，了解流水灯的工作原理，掌握其逻辑功能及设计方法。

三、设计内容

1、用VerilogHDL语言设计一个流水灯，输入0的时候led~led7，1Hz正向流水3次，然后全亮；然后2Hz逆向流水5次全亮；循环。输入1的时候led0~led7,0.5Hz奇数流水2次，全亮，1Hz偶数流水4次，全亮，然后循环。

2、用QuartusII 软件进行编译，仿真，下载到实验平台进行验证。

四、设计原理图

en为可调输入，输出为8位数据，为流水灯实验，试用8个LED指示灯来表示，具体引脚分配见下。

五、引脚分配情况

六、源程序代码

VerilogHDL 程序：

module LED( clk,led,en );

input clk;

input en;

output [7:0]led;// 输出端口定义为寄存器型

reg [7:0] led;

reg [8:0] state1;

reg [8:0] state2;

always @(posedge clk )// always语句，表示每当CLK的上升沿到来时，完成begin-end之间语句的操作

if(!en)

begin state2 = 0;

state1 = state1 + 1; // one clk,one state

case(state1)

1,2: led <= 8'b00000001; //1-7 zhengxu,3bian

3,4: led <= 8'b00000010;

5,6: led <= 8'b00000100;

7,8: led <= 8'b00001000;

9,10: led <= 8'b00010000;

11,12: led <= 8'b00100000;

13,14: led <= 8'b01000000;

15,16: led <= 8'b10000000;

17,18: led <= 8'b00000001;

19,20: led <= 8'b00000010;

21,22: led <= 8'b00000100;

23,24: led <= 8'b00001000;

25,26: led <= 8'b00010000;

27,28: led <= 8'b00100000;

29,30: led <= 8'b01000000;

31,32: led <= 8'b10000000;

33,34: led <= 8'b00000001;

35,36: led <= 8'b00000010;

37,38: led <= 8'b00000100;

39,40: led <= 8'b00001000;

41,42: led <= 8'b00010000;

43,44: led <= 8'b00100000;

45,46: led <= 8'b01000000;

47,48: led <= 8'b10000000;

49: led <= 8'b11111111; //quanliang

50: led <= 8'b10000000;

51: led <= 8'b01000000;

52: led <= 8'b00100000;

53: led <= 8'b00010000;

54: led <= 8'b00001000;

55: led <= 8'b00000100;

56: led <= 8'b00000010;

57: led <= 8'b00000001;

58: led <= 8'b10000000;

59: led <= 8'b01000000;

60: led <= 8'b00100000;

61: led <= 8'b00010000;

62: led <= 8'b00001000;

63: led <= 8'b00000100;

64: led <= 8'b00000010;

65: led <= 8'b00000001;

66: led <= 8'b10000000;

67: led <= 8'b01000000;

68: led <= 8'b00100000;

69: led <= 8'b00010000;

70: led <= 8'b00001000;

71: led <= 8'b00000100;

72: led <= 8'b00000010;

73: led <= 8'b00000001;

74: led <= 8'b10000000;

75: led <= 8'b01000000;

76: led <= 8'b00100000;

77: led <= 8'b00010000;

78: led <= 8'b00001000;

79: led <= 8'b00000100;

80: led <= 8'b00000010;

81: led <= 8'b00000001;

82: led <= 8'b10000000;

83: led <= 8'b01000000;

84: led <= 8'b00100000;

85: led <= 8'b00010000;

86: led <= 8'b00001000;

87: led <= 8'b00000100;

88: led <= 8'b00000010;

89: led <= 8'b00000001;

90: led <= 8'b11111111;

91: begin led <= 8'b00000000;state1=0;end default: state1 = 0;

endcase

end

else

begin state1 = 0;

state2 = state2 + 1; // one clk,one state