树莓派_字母板的使用

来源：互联网发布：淘宝拍卖字画是真的吗编辑：程序博客网时间：2024/05/16 19:42

一、实验目的

熟悉字母板

二、实验内容

用LED矩阵实现一个字母板，由RPi程序显示不同的字母和符号。PS：又采购了一批小字母板，每个人可以有一个，找你们的TA去拿

三、主要仪器设备

1. RPI

2. 移动电源

3. Win7 PC机一台

4. 面包板

5. 面包线、杜邦线

6. 字母板

四、操作方法和实验步骤

1.安装wiringPi库

使用git工具下载wiringPi

查询当前目录下的wiringPi，并进入该目录，使用build命令安装

验证，已安装！

2.电路设计

实际上电路是按顺序接的：

电路接线

3.实验代码

输出设计为：

程序中各写操作对应：

列的0值表示亮，1值表示暗。

行的0值表示暗，1值表示亮。

欲控制某行某列点亮，必须该行值为1和该列值为0。

以下是全暗的例子：

digitalWrite(0, 0); 行8

digitalWrite(1, 1); 列5

digitalWrite(2, 1); 列3

digitalWrite(3, 0); 行5

digitalWrite(4, 1); 列8

digitalWrite(5, 0); 行7

digitalWrite(6, 1); 列2

digitalWrite(7, 1); 列1

digitalWrite(8, 0); 行6

digitalWrite(9, 0); 行3

digitalWrite(10, 1); 列4

digitalWrite(11, 0); 行1

digitalWrite(12, 1); 列6

digitalWrite(13, 1); C7

digitalWrite(14, 0); 行2

digitalWrite(15, 0); 行4

#include <stdio.h>

#include <wiringPi.h>

#include <stdlib.h>

int main(int argc,char * argv[]){

struct timeval t_start,t_end;

int pin, flag, i;

long percent, time, cost_time;

wiringPiSetup ();//³õÊ¼»¯Ð´¿Ú

for (pin = 0 ; pin < 16; ++pin) {

pinMode (pin, OUTPUT) ;

}

while(1)//Ñ»·Êä³ö

{

i=0;

while(i < 250) //Ñ»·Êä³öM

{

if(i % 5 == 0) //Êä³öµÚÒ»ÁÐ

{

digitalWrite(0, 0);

digitalWrite(1, 1);

digitalWrite(2, 1);

digitalWrite(3, 1);

digitalWrite(4, 1);

digitalWrite(5, 1);

digitalWrite(6, 0);

digitalWrite(7, 1);

digitalWrite(8, 1);

digitalWrite(9, 1);

digitalWrite(10, 1);

digitalWrite(11, 0);

digitalWrite(12, 1);

digitalWrite(13, 1);

digitalWrite(14, 1);

digitalWrite(15, 1);

}

if(i % 5 == 1) //Êä³öµÚ¶þÁÐ

{

digitalWrite(0, 0);

digitalWrite(1, 1);

digitalWrite(2, 0);

digitalWrite(3, 0);

digitalWrite(4, 1);

digitalWrite(5, 0);

digitalWrite(6, 1);

digitalWrite(7, 1);

digitalWrite(8, 0);

digitalWrite(9, 0);

digitalWrite(10, 1);

digitalWrite(11, 0);

digitalWrite(12, 1);

digitalWrite(13, 1);

digitalWrite(14, 1);

digitalWrite(15, 0);

}

if(i % 5 == 2)

{

digitalWrite(0, 0);

digitalWrite(1, 1);

digitalWrite(2, 1);

digitalWrite(3, 1);

digitalWrite(4, 1);

digitalWrite(5, 1);

digitalWrite(6, 1);

digitalWrite(7, 1);

digitalWrite(8, 1);

digitalWrite(9, 1);

digitalWrite(10, 0);

digitalWrite(11, 0);

digitalWrite(12, 1);

digitalWrite(13, 1);

digitalWrite(14, 1);

digitalWrite(15, 1);

}

if(i % 5 == 3)

{

digitalWrite(0, 0);

digitalWrite(1, 0);

digitalWrite(2, 1);

digitalWrite(3, 0);

digitalWrite(4, 1);

digitalWrite(5, 0);

digitalWrite(6, 1);

digitalWrite(7, 1);

digitalWrite(8, 0);

digitalWrite(9, 0);

digitalWrite(10, 1);

digitalWrite(11, 0);

digitalWrite(12, 1);

digitalWrite(13, 1);

digitalWrite(14, 1);

digitalWrite(15, 0);

}

if(i % 5 == 4)

{

digitalWrite(0, 0);

digitalWrite(1, 1);

digitalWrite(2, 1);

digitalWrite(3, 1);

digitalWrite(4, 1);

digitalWrite(5, 1);

digitalWrite(6, 1);

digitalWrite(7, 1);

digitalWrite(8, 1);

digitalWrite(9, 1);

digitalWrite(10, 1);

digitalWrite(11, 0);

digitalWrite(12, 0);

digitalWrite(13, 1);

digitalWrite(14, 1);

digitalWrite(15, 1);

}

i++;

delay(3);

}

//È«°µ£¬Çø·ÖÁ½¸ö×ÖÄ¸

digitalWrite(0, 0);

digitalWrite(1, 1);

digitalWrite(2, 1);

digitalWrite(3, 0);

digitalWrite(4, 1);

digitalWrite(5, 0);

digitalWrite(6, 1);

digitalWrite(7, 1);

digitalWrite(8, 0);

digitalWrite(9, 0);

digitalWrite(10, 1);

digitalWrite(11, 0);

digitalWrite(12, 1);

digitalWrite(13, 1);

digitalWrite(14, 0);

digitalWrite(15, 0);

delay(100);

i = 0;

while(i < 250){

if(i % 5 == 0) //Êä³öµÚÒ»ÁÐ

{

digitalWrite(0, 0);

digitalWrite(1, 1);

digitalWrite(2, 1);

digitalWrite(3, 0);

digitalWrite(4, 1);

digitalWrite(5, 1);

digitalWrite(6, 0);

digitalWrite(7, 1);

digitalWrite(8, 1);

digitalWrite(9, 0);

digitalWrite(10, 1);

digitalWrite(11, 0);

digitalWrite(12, 1);

digitalWrite(13, 1);

digitalWrite(14, 1);

digitalWrite(15, 0);

}

if(i % 5 == 1) //Êä³öµÚ¶þÁÐ

{

digitalWrite(0, 0);

digitalWrite(1, 1);

digitalWrite(2, 0);

digitalWrite(3, 0);

digitalWrite(4, 1);

digitalWrite(5, 1);

digitalWrite(6, 1);

digitalWrite(7, 1);

digitalWrite(8, 0);

digitalWrite(9, 0);

digitalWrite(10, 1);

digitalWrite(11, 0);

digitalWrite(12, 1);

digitalWrite(13, 1);

digitalWrite(14, 1);

digitalWrite(15, 0);

}

if(i % 5 == 2)

{

digitalWrite(0, 0);

digitalWrite(1, 1);

digitalWrite(2, 1);

digitalWrite(3, 1);

digitalWrite(4, 1);

digitalWrite(5, 1);

digitalWrite(6, 1);

digitalWrite(7, 1);

digitalWrite(8, 1);

digitalWrite(9, 1);

digitalWrite(10, 0);

digitalWrite(11, 0);

digitalWrite(12, 1);

digitalWrite(13, 1);

digitalWrite(14, 1);

digitalWrite(15, 1);

}

if(i % 5 == 3)

{

digitalWrite(0, 0);

digitalWrite(1, 0);

digitalWrite(2, 1);

digitalWrite(3, 0);

digitalWrite(4, 1);

digitalWrite(5, 0);

digitalWrite(6, 1);

digitalWrite(7, 1);

digitalWrite(8, 0);

digitalWrite(9, 0);

digitalWrite(10, 1);

digitalWrite(11, 0);

digitalWrite(12, 1);

digitalWrite(13, 1);

digitalWrite(14, 1);

digitalWrite(15, 0);

}

if(i % 5 == 4)

{

digitalWrite(0, 0);

digitalWrite(1, 1);

digitalWrite(2, 1);

digitalWrite(3, 0);

digitalWrite(4, 1);

digitalWrite(5, 0);

digitalWrite(6, 1);

digitalWrite(7, 1);

digitalWrite(8, 0);

digitalWrite(9, 0);

digitalWrite(10, 1);

digitalWrite(11, 0);

digitalWrite(12, 0);

digitalWrite(13, 1);

digitalWrite(14, 1);

digitalWrite(15, 0);

}

i++;

delay(3);

}

return 0;

}

4.实验结果

复制代码至树莓派，ls查看

编译代码

运行后效果如下

实际上屏幕一直在M和J来回跳动，MJ即满绩。。。。

具体效果请看下面一段视频:

http://v.youku.com/v_show/id_XNTc0MzYyOTE2.html