目录

6818输入设备

输入设备

输入设备在头文件中定义的结构体

练习：获取手指触摸的指标，并且触摸后切换图片

操作一个触摸屏

五子棋游戏开发

实现功能

实现代码

main.c

pm.h

pm.c

ev.h

ev.c

6818输入设备

输入设备

输入设备在头文件中定义的结构体

键盘、鼠标、触摸屏、麦克风.....

Linux下面这些输入设备也是一个文件，都包含一个头文件 #include <linux/input.h>

在头文件中定义了一个结构体

struct input_event

{

struct timeval time;//输入时间产生的时间

__u16 type;//输入事件的类型

#define EV_SYN 0x00 同步事件，用来同步数据

#define EV_KEY 0x01 按键事件，如键盘，触摸屏的接触与离开

#define EV_REL 0x02 相对事件，如鼠标的移动

#define EV_ABS 0x03 绝对事件，如触摸屏的坐标

__u16 code;//编码，为了区分同一事件类型下，不同的输入事件

#define BTN_TOUCH 0x14a(330) 接触触摸屏或者离开触摸屏

#define ABS_X 0x00 触摸屏坐标的X轴

#define ABS_Y 0x01 触摸屏的Y轴

#define ABS_PRESSURE 0x18 触摸屏的压力值事件

__s32 value;//值，根据type，code的不同，有不同的含义

如：type = 按键类型

code = BTN_TOUCH

value = 按键的状态

type = EV_ABS

code = ABS_X

value = x坐标

}

练习：获取手指触摸的指标，并且触摸后切换图片

/*获取触摸点的位置判断触摸动作（点击，右滑等）*/int Get_ev(int *x,int *y){int fd = open("/dev/input/event0",O_RDONLY);if(-1 == fd){perror("open error");return -1;}struct input_event ev;int x1,y1;while(1){read(fd,&ev,sizeof(ev));printf("ev_type = %d code = %d value = %d\n",ev.type,ev.code,ev.value);if(ev.type == EV_ABS)//输入事件的类型为绝对事件，如触摸屏的坐标{if(ev.code == 0) //触摸屏坐标的X轴{x1 = ev.value;//6818开发板如果是黑底，x1 = ev.value * 800 / 1024。我这里是蓝底的}else //触摸屏坐标的X轴{y1 = ev.value ;//6818开发板如果是黑底y1 = ev.value * 480 / 600}}if(ev.type == EV_KEY && ev.code == 330 && ev.value == 1)//保存初始坐标{*x = x1;*y = y1;}if(ev.type == EV_KEY && ev.code == 330 && ev.value == 0){if(*x == x1 && *y == y1)//点击{printf("dianji\n");}if(x1 >= *x) //右滑{printf("zouhua\n");}break;}}}

//写入BMP格式的图片int Dis_pic(char *pic){int fd = open(pic,O_RDONLY);if(-1 == fd){perror("open error");return -1;}int width,heigh;short depth;lseek(fd,0x12,SEEK_SET);read(fd,&width,4);read(fd,&heigh,4);lseek(fd,0x1c,SEEK_SET);read(fd,&depth,2);printf(" %d %d %d\n",width,heigh,depth);int laizi =(4 - (width * depth / 8) % 4) % 4;//要加的点unsigned char color_buf[heigh * (width * depth / 8 + laizi)];//32 24 char color_a = 0,color_r,color_g,color_b; //颜色分量unsigned int color;//像素点的颜色unsigned char *p = color_buf;lseek(fd,0x36,SEEK_SET);for(int i = heigh - 1;i >= 0;i--){for(int j = 0;j < width;j++){color_b = *p++;//b颜色color_g = *p++;color_r = *p++;if(32 == depth){color_a = *p++;}//0000 0000 0000 0000 0000 0000 1111 1111// 0000 0000 0000 0000 1111 1111 0000 0000//color 1111 1111 1111 1111 1111 1111 1111 1111color = color_a << 24 | color_r << 16 | color_g << 8 | color_b;//屏幕需要的颜色a r g bDisplay(color, j, i);}p += laizi;}}

操作一个触摸屏

打开触摸屏文件(/dev/input/event0)

创建一个结构体，保存数据

循环读取触摸屏的数据

关闭文件

运行上述代码后，点击屏幕会返回以下运行日志

ev_type = 3 code = 0 value = 561ev_type = 3 code = 1 value = 333(561,333)//最开始坐标ev_type = 1 code = 330 value = 1//第一次接触触摸屏ev_type = 0 code = 0 value = 0ev_type = 1 code = 330 value = 0//离开触摸屏ev_type = 0 code = 0 value = 0

五子棋游戏开发

实现功能

有游戏开始界面，点击后进入游戏界面，判断五子连珠后弹出游戏结束界面(有部分冗余代码是做其他测试用的）

mian.c//主函数，初始化输入设备，运行 游戏函数

pm.c//画棋盘以及白字黑字的落子，还有图片写入等屏幕写入函数

ev.c//落子的具体坐标，判断五子连珠

实现代码

main.c

#include "pm.h"#include "ev.h"#include <stdio.h>int main(){int x,y;Lcd_Init();Dis_pic("kaishi.bmp"); //写入游戏开始界面Get_ev(&x,&y);return 0;}

pm.h

#ifndef __LCD_H__#define __LCD_H__#include <stdio.h>#include <sys/stat.h>#include <fcntl.h>#include <sys/types.h>#include <unistd.h>#include <sys/mman.h>#include <math.h>void se();int Lcd_Init();void Dis_wh();void Display( int color,int x,int y);int Dis_pic(char *pic);void Dis_pan();void Dis_xian();void Dis_baizi(int x,int y);void Dis_heizi(int x,int y);#endif

pm.c

#include <stdio.h>#include "pm.h"unsigned int *plcd =NULL;void Display( int color,int x,int y){if(x >= 0 && x <=800 && y >= 0 && y <= 480){*(plcd + y * 800 + x) = color;}}void se(){int fd = open("/dev/fb0",O_RDWR);if(fd == -1){perror("open error");}int color[10] = {0x10900,0xff00ff,0xf0394f,0xf009ba9f,0xf066f3,0x856fa,0x9392c83b};int j=0;while(1){for(int i=0;i<384000;i++){int w = write(fd,&color[j],4);if(-1 == w){perror("write error");}}sleep(2);j++;if(j==7) j=0;lseek(fd,0,SEEK_SET);//定位光标在文件头}}int Lcd_Init(){int fd = open("/dev/fb0",O_RDWR);if(fd == -1){perror("open error");return -2;}plcd = mmap(NULL,800*480*4,PROT_READ | PROT_WRITE,MAP_SHARED,fd,0);}void Dis_wh(){//int color[10] = {0x190f0,0xff00ff,0xff,0xff0000ff,0xf0f083,0x8596fa,0x298c83b};//int q=0;//while(1){for (int i = 0;i <= 880;i++){for(int j = 0;j < 480;j++){//int p = if(((i-400)*(i-400) + (j-240)*(j-240) - 1)*((i-400)*(i-400) + (j-240)*(j-240) - 1)*((i-400)*(i-400) + (j-240)*(j-240) - 1)< (i-400)*(i-400) - (j-240)*(j-240)){Display(0xf0f083, i, j);}}//}//sleep(2);//q++;//if(q==7) q=0;}}//画图片int Dis_pic(char *pic){int fd = open(pic,O_RDONLY);if(-1 == fd){perror("open error");return -1;}int width,heigh;short depth;lseek(fd,0x12,SEEK_SET);read(fd,&width,4);read(fd,&heigh,4);lseek(fd,0x1c,SEEK_SET);read(fd,&depth,2);printf(" %d %d %d\n",width,heigh,depth);int laizi;unsigned char color_buf[width * heigh * depth / 8];//32 24 char color_a = 0,color_r,color_g,color_b; //颜色分量unsigned int color;//像素点的颜色char *p = color_buf;lseek(fd,0x36,SEEK_SET);read(fd,color_buf,width * heigh * depth / 8);for(int i = heigh - 1;i >= 0;i--){for(int j = 0;j < width;j++){color_b = *p++;//b颜色color_g = *p++;color_r = *p++;if(32 == depth){color_a = *p++;}color = color_a << 24 | color_r << 16 | color_g << 8 | color_b;//屏幕需要的颜色a r g bDisplay(color, j, i);}}}void Dis_pan(){for(int i = 0;i < 800;i++){for(int j = 0;j < 480;j++){Display(0xf0f00f, i, j);}}}void Dis_xian(){for(int i = 50;i <= 650;i+=50){for(int j = 20;j < 460;j++){Display(0x0, i, j);}}for(int i = 20;i <= 460;i+=40){for(int j = 50;j < 650;j++){Display(0x0, j, i);}}}void Dis_baizi(int x,int y){for(int i = 0;i < 480;i++){for(int j = 0;j < 800;j++){if((i-x)*(i-x) + (j-y)*(j-y)<170){Display(0xffffff, j, i);}}}}void Dis_heizi(int x,int y){for(int i = 0;i < 480;i++){for(int j = 0;j < 800;j++){if((i-x)*(i-x) + (j-y)*(j-y)<170){Display(0x0, j, i);}}}}

ev.h

#ifndef __EV_H__#define __EV_H__#include <stdio.h>#include <sys/stat.h>#include <fcntl.h>#include <sys/types.h>#include <unistd.h>#include <sys/mman.h>#include <math.h>#include <linux/input.h>int Get_ev(int *x,int *y);int jud(int a,int b,int c);#endif

ev.c

#include "ev.h"#include "pm.h"int state[12][13]={0};int jud(int a,int b,int c){int num=0;if(state[a][b]==c){for(int i=0;i <= 12;i++) //判断横{if(state[a][i]==c){num++;if(num == 5){Dis_pic("t5.bmp");return 2;break;}}else num=0;}for(int i=0;i <= a+4;i++) //判断竖{if(state[i][b]==c){num++;if(num == 5){Dis_pic("t5.bmp");return 2;break;}}else num=0;}if(a<=b) //判断左上到右下{for(int i=0,j=b-a;i<12 && j<13;i++,j++){if(state[i][j]==c){num++;if(num == 5){Dis_pic("t5.bmp");return 2;break;}}else num=0;}}else if(a>b) //判断左上到右下{ for(int j=0,i=a-b;i<12 && j<13;i++,j++){if(state[i][j]==c){num++;if(num == 5){Dis_pic("t5.bmp");return 2;break;}}else num=0;}}if(a>=b)//判断右上到左下{for(int i=a+b,j=0;i>=0;i--,j++){if(state[i][j]==c){num++;if(num == 5){Dis_pic("t5.bmp");return 2;break;}}else num=0;}}if(b>a)//判断右上到左下{for(int i=11,j=b+a-11;j<=12;i--,j++){if(state[i][j]==c){num++;if(num == 5){Dis_pic("t5.bmp");return 2;break;}}else num=0;}}}}int Get_ev(int *x,int *y){int fd = open("/dev/input/event0",O_RDONLY);if(-1 == fd){perror("open error");return -1;}struct input_event ev;int x1,y1,q=0,w;while(1){read(fd,&ev,sizeof(ev));printf("ev_type = %d code = %d value = %d\n",ev.type,ev.code,ev.value);if(ev.type == EV_ABS){if(ev.code == 0)//x{x1 = ev.value;}else{y1 = ev.value;}}if(ev.type == EV_KEY && ev.code == 330 && ev.value == 1)//保存初始坐标{*x = x1;*y = y1;}//点击if(ev.type == EV_KEY && ev.code == 330 && ev.value == 0){if(*x == x1 && *y == y1)//点击{printf("dianji\n");Dis_pan();Dis_xian();break;}}}while(1){read(fd,&ev,sizeof(ev));printf("ev_type = %d code = %d value = %d\n",ev.type,ev.code,ev.value);if(ev.type == EV_ABS){if(ev.code == 0)//x{x1 = ev.value;// 1024}else{y1 = ev.value;}}if(ev.type == EV_KEY && ev.code == 330 && ev.value == 1)//保存初始坐标{*x = x1;*y = y1;}//点击if(ev.type == EV_KEY && ev.code == 330 && ev.value == 0){if(*x == x1 && *y == y1)//点击{printf("dianji\n");for(int i = 20;i <= 460;i+=40){for(int j = 50;j <= 650;j+=50){int a,b;a=(i-20)/40;b=(j-50)/50;if(q == 0 && (*x - j)*(*x - j) + (*y - i)*(*y - i) < 400 && state[a][b] == 0){Dis_heizi(i, j);state[a][b]=1;printf("%d--%d--%d",a,b,state[a][b]);w = jud(a,b,1);q++;break;}else if(q == 1 && (*x - j)*(*x - j) + (*y - i)*(*y - i) < 400 && state[a][b] == 0){Dis_baizi(i, j);state[a][b]=2;w = jud(a,b,2);q--;break;}}if(w == 2) break;}}}}}

如果觉得《ARM6818开发板输入设备（触摸屏）操作（开发五子棋游戏）》对你有帮助，请点赞、收藏，并留下你的观点哦！