A53开发板——WIFI（ESP8266）的应用例子
程序员文章站
2024-03-23 09:44:52
...
首先你得需要ESP8266得详细资料，了解模式和AT指令
其余代码中有详细得注释
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <stdio.h>
#include <sys/mman.h>
#include <termios.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <math.h>
#include <linux/input.h>
int *plcd = NULL;//用来保存映射首地址
int lcd_fd;//屏幕的文件描述符
int flag_music=0;//音乐开关描述符 0是暂停状态 1是播放状态
int flag_yaolan=0;//摇篮开关描述符 0是暂停状态 1是开启状态
char Buf3[80];
char Buf2[80];
char Buf1[80];
/*初始化lcd屏*/
int lcd_init()
{
/*1、打开屏幕文件*/
lcd_fd = open("/dev/fb0",O_RDWR);
if(lcd_fd == -1)
{
perror("oepn lcd error");
return -1;
}
/*2、映射*/
plcd = mmap(NULL, //映射地址，NULL表示让系统自行选择
800*480*4, //映射地址大小
PROT_READ|PROT_WRITE, //映射地址的权限
MAP_SHARED, //映射标识位
lcd_fd, //文件描述符，表示要映射的文件
0); //文件偏移量，0表示不偏移
}
/*解除lcd*/
void lcd_uninit()
{
/*解除映射*/
munmap(plcd,800*480*4);
close(lcd_fd);
}
/*
画点函数
x/y 坐标点的值
colour 颜色
*/
void lcd_draw_point(int x,int y,int colour)
{
*(plcd + x + y*800) = colour;
}
/*
清屏函数
x0,y0 清屏的起始坐标
w 清屏宽度
h 清屏高度
colour 颜色
*/
void lcd_draw_clear(int x0,int y0,int w,int h,unsigned int colour)
{
int x,y;
for(y=0;y<h;y++)
{
for(x=0;x<w;x++)
{
lcd_draw_point(x0+x,y0+y,colour);
}
}
}
/*
显示图像
x0/y0 图像从哪开始显示
w/h 图像的宽和高
file 要显示的图片名
*/
int image_show(int x0,int y0,int w,int h,char *file)
{
int fd = open(file,O_RDONLY); //打开图片文件
if(fd == -1)
{
printf("open failed!\n");
return -1;
}
char *buf = malloc(w*h*24/8);
//去掉bmp前54字节信息头
lseek(fd,54,SEEK_SET);
read(fd, buf, w*h*24/8);
//读取像素数组
//组合颜色值，调用画点函数显示
int colour;
char a, r, g, b;
int x, y;
for(y=0;y<h;y++)
{
for(x=0;x<w;x++)
{
a = 0;
b = *buf++;
g = *buf++;
r = *buf++;
colour = a << 24 | r << 16 | g << 8 | b;
lcd_draw_point(x+x0,h-1-y+y0,colour);
}
}
close(fd);
return 0;
}
int image_show1(int l,int x0,int y0,int w,int h,char *file)
{
int fd = open(file,O_RDONLY); //打开图片文件
if(fd == -1)
{
printf("open failed!\n");
return -1;
}
char *buf = malloc(w*h*24/8);
//去掉bmp前54字节信息头
lseek(fd,54,SEEK_SET);
read(fd, buf, w*h*24/8);
//读取像素数组
//组合颜色值，调用画点函数显示
int colour;
char a, r, g, b;
int x, y;
int d;
for(y=0;y<h;y++)
{
for(x=0;x<w;x++)
{
a = 0;
b = *buf++;
g = *buf++;
r = *buf++;
colour = a << 24 | r << 16 | g << 8 | b;
if((l*l) >= (abs(x-l)*abs(x-l)+abs(y-l)*abs(y-l)))
{
lcd_draw_point(x+x0,h-1-y+y0,colour);
}
}
}
close(fd);
return 0;
}
int input(void)
{
printf("input come in!\n\n");
/*1.open the file,input file is /dev/event0*/
int fd = open("/dev/input/event0",O_RDWR);
if(fd == -1)
{
perror("open event0 error");
return -1;
}
/*2.read the file get input event*/
struct input_event ev; //用来保存输入事件的结构体变量
int x,y,value;
int x1,y1;
while(1)
{
read(fd,&ev,sizeof(ev)); //获取输入事件
if(ev.type == EV_KEY )
{
if(ev.code == BTN_TOUCH)
{
value = ev.value; //获取压力值
}
}
if(ev.type == EV_ABS) //判断是不是触摸屏事件
{
if(ev.code == ABS_X)
{
x = ev.value; //x轴坐标值
}
if(ev.code == ABS_Y)
{
y = ev.value; // y轴坐标值
}
}
printf("111 x : %d y : %d value : %d \n\n",x,y,value);
if(ev.type == EV_KEY )
{
if(ev.code == BTN_TOUCH)
{
printf("shijian : touch\n\n");
if(value == 1 && x>220 && x<300 && y>350 && y<430) //表示手指离开时，xy坐标在音乐区域
{
if(flag_music == 0)
{
image_show1(40,220,350,80,80,"./pause1.bmp");
flag_music = 1;
}
else if(flag_music == 1)
{
image_show1(40,220,350,80,80,"./play.bmp");
flag_music =0;
}
}
else if(value == 1 && x>470 && x<550 && y>350 && y<430) //表示手指离开时，xy坐标在摇篮区域
{
if(flag_yaolan == 0)
{
image_show1(40,470,350,80,80,"./pause1.bmp");
flag_yaolan = 1;
}
else if(flag_yaolan == 1)
{
image_show1(40,470,350,80,80,"./play.bmp");
flag_yaolan =0;
}
}
}
}
}
/*3.close the file*/
}
/*
初始化串口函数
file：表示要打开的串口
bt：表示要设置的波特率
*/
int serial_init(char *file,int bt)
{
int fd = open(file,O_RDWR);
if(fd == -1)
{
perror("open serial error");
return -1;
}
/*设置串口属性*/
struct termios myserial;
memset(&myserial,0,sizeof(myserial)); //清空地址
myserial.c_cflag |= CLOCAL | CREAD; //设置本地连接，接受使能
myserial.c_cflag &= ~CSIZE; //清空数据位
myserial.c_cflag |= CS8; //设置数据位 8
myserial.c_cflag &= ~CSTOPB; //停止位1
myserial.c_cflag &= ~PARENB; //不要校验位
myserial.c_cflag &= ~CRTSCTS; //不要硬件控制流
/*设置波特率*/
switch(bt)
{
case 9600:
cfsetispeed(&myserial,B9600);
cfsetospeed(&myserial,B9600);
break;
case 57600:
cfsetispeed(&myserial,B57600);
cfsetospeed(&myserial,B57600);
break;
case 115200:
cfsetispeed(&myserial,B115200);
cfsetospeed(&myserial,B115200);
break;
}
/*清空缓存队列*/
tcflush(fd,TCIOFLUSH);
/*设置生效*/
tcsetattr(fd,TCSANOW,&myserial);
return fd;
}
/*
WIFI模块初始化函数
*/
int wifi_init(int fd)
{
printf("come in !!\n");
char order1[]="AT+CWMODE=1\r\n";//WIFI初始化指令
char order2[]="AT+CWJAP=\"WIFI-ESP8266\",\"66666666\"\r\n";//WIFI连接路由
char order3[]="AT+CIPSTART=\"TCP\",\"192.168.4.1\",6666\r\n";//连接服务器
char ack[200]={0};//回复数据包
int ff;
while(1)
{
ff = tcflush(fd,TCIOFLUSH);
printf("ff1 :%d\n",ff);
while(1)
{
/*发送命令*/
int ret0 = write(fd,order1,strlen(order1));
ff = tcflush(fd,TCIOFLUSH);
printf("order1:%s\n",order1);
sleep(1);
if(ret0 > 0)
{
break;
}
}
memset(ack,0,sizeof(ack));//清空字符数组
/*接收回复数据*/
while (1)
{
int ret;
ret = read(fd,ack,200);
sleep(1);
if (ret > 0)
break;
}
ff = tcflush(fd,TCIOFLUSH);
sleep(1);
if(strstr((char const*)ack,"OK") != NULL)
{
printf("first if come!!! \n\n");
while(1)
{
ff = tcflush(fd,TCIOFLUSH);
/*发送命令*/
write(fd,order2,strlen(order2));
ff = tcflush(fd,TCIOFLUSH);
memset(ack,0,sizeof(ack));//清空字符数组
sleep(1);
/*接收回复数据*/
while (1)
{
int ret1;
ret1 = read(fd,ack,200);
if (ret1 > 0)
break;
}
if(strstr((char const*)ack,"OK") != NULL)
{
printf("2222 if come!!! \n\n");
while(1)
{
ff = tcflush(fd,TCIOFLUSH);
/*发送命令*/
write(fd,order3,strlen(order3));
ff = tcflush(fd,TCIOFLUSH);
memset(ack,0,sizeof(ack));//清空字符数组
/*接收回复数据*/
while (1)
{
int ret2;
ret2 = read(fd,ack,200);
sleep(1);
if (ret2 > 0)
break;
}
if(strstr((char const*)ack,"OK") != NULL)
{
break;
}
else
{
continue;
}
}
}
else
{
continue;
}
break;
}
}
else
{
continue;
}
break;
}
return 1;
}
void* wifi()
{
int fd = serial_init("/dev/ttySAC1",115200); //打开WIFI模块通信串口
int ok = wifi_init(fd);
if(ok == 1)
{
printf("wifi_init is ok!\n");
lcd_draw_clear(750,30,40,20,0x00EE00);
}
int ff;
ff = tcflush(fd,TCIOFLUSH);
sleep(1);
char wifi_order1[]="AT+CIPSEND=7\r\n";//wifi发送指令
char yaolan_open[7] = {0x3A,0x00,0x01,0x0A,0x00,0x31,0x23}; //摇篮 开启命令
char yaolan_close[7] = {0x3A,0x00,0x01,0x0A,0x01,0x30,0x23}; //摇篮 关闭命令
char music_open[7] = {0x3A,0x00,0x01,0x0A,0x10,0x21,0x23}; //音乐 开启命令
char music_close[7] = {0x3A,0x00,0x01,0x0A,0x11,0x20,0x23}; //音乐 关闭命令
char ack[200] = {0};//回复数据包
char *pAddr1;
char *pAddr2;
char *pAddr3;
unsigned char len1;
unsigned char len2;
unsigned char len3;
while(1)
{
memset(ack,0,sizeof(ack));//清空字符数组
/*接收回复数据*/
int ret = read(fd,ack,200);
printf("ret : %d ack : %s\n\n",ret,ack);
sleep(1);
if(strstr((char const*)ack,"+IPD") != NULL)
{
if(strstr((char const*)ack,"E3") != NULL)
{
pAddr3 = strstr((char const*)ack,":");
len3 = *(pAddr3 - 1) - 0x30;//读取数据的长度
pAddr3++;
memcpy(Buf3,pAddr3,len3);
printf("Buf3 : %c%c%c%c%c\n\n",Buf3[4],Buf3[5],Buf3[6],Buf3[7],Buf3[8]);
}
else if(strstr((char const*)ack,"E2") != NULL)
{
pAddr2 = strstr((char const*)ack,":");
len2 = *(pAddr2 - 1) - 0x30;//读取数据的长度
pAddr2++;
memcpy(Buf2,pAddr2,len2);
printf("Buf2 : %s\n\n",Buf2);
}
else if(strstr((char const*)ack,"E1") != NULL)
{
pAddr1 = strstr((char const*)ack,":");
len1 = *(pAddr1 - 1) - 0x30;//读取数据的长度
pAddr1++;
memcpy(Buf1,pAddr1,len1);
printf("Buf1 : %s\n\n",Buf1);
}
}
printf("flag_music : %d\n\n",flag_music);
//音乐开关
if(flag_music == 1)
{
while(1)
{
//ff = tcflush(fd,TCIOFLUSH);
/*发送命令*/
write(fd,wifi_order1,strlen(wifi_order1));
//ff = tcflush(fd,TCIOFLUSH);
//memset(ack,0,sizeof(ack));//清空字符数组
sleep(1);
/*接收回复数据*/
while (1)
{
int ret1;
ret1 = read(fd,ack,200);
printf("ret1 : %d\n\n");
if (ret1 > 0)
break;
}
printf("111music ack : %s\n\n",ack);
if(strstr((char const*)ack,">") != NULL)
{
//ff = tcflush(fd,TCIOFLUSH);
write(fd,music_open,7);
// ff = tcflush(fd,TCIOFLUSH);
while (1)
{
int ret2;
ret2 = read(fd,ack,200);
if (ret2 > 0)
break;
}
printf("222music ack : %s\n\n",ack);
if(strstr((char const*)ack,"SEND OK") != NULL)
{
printf("music ok !!!\n\n");
break;
}
}
}
}
else if(flag_music == 0)
{
//ff = tcflush(fd,TCIOFLUSH);
/*发送命令*/
write(fd,wifi_order1,strlen(wifi_order1));
//ff = tcflush(fd,TCIOFLUSH);
//memset(ack,0,sizeof(ack));//清空字符数组
sleep(1);
/*接收回复数据*/
while (1)
{
int ret3;
ret3 = read(fd,ack,200);
if (ret3 > 0)
break;
}
if(strstr((char const*)ack,">") != NULL)
{
//ff = tcflush(fd,TCIOFLUSH);
write(fd,music_close,7);
//ff = tcflush(fd,TCIOFLUSH);
while (1)
{
int ret4;
ret4 = read(fd,ack,200);
if (ret4 > 0)
break;
}
if(strstr((char const*)ack,"SEND OK") != NULL)
{
printf("music close !!!\n\n");
break;
}
}
}
//摇篮开关
if(flag_yaolan == 1)
{
while(1)
{
//ff = tcflush(fd,TCIOFLUSH);
/*发送命令*/
write(fd,wifi_order1,strlen(wifi_order1));
//ff = tcflush(fd,TCIOFLUSH);
// memset(ack,0,sizeof(ack));//清空字符数组
sleep(1);
/*接收回复数据*/
while (1)
{
int ret5;
ret5 = read(fd,ack,200);
if (ret5 > 0)
break;
}
if(strstr((char const*)ack,">") != NULL)
{
//ff = tcflush(fd,TCIOFLUSH);
write(fd,yaolan_open,7);
///ff = tcflush(fd,TCIOFLUSH);
while (1)
{
int ret6;
ret6 = read(fd,ack,200);
if (ret6 > 0)
break;
}
if(strstr((char const*)ack,"SEND OK") != NULL)
{
printf("yaolan ok !!!\n\n");
break;
}
}
}
}
else if(flag_yaolan == 0)
{
//ff = tcflush(fd,TCIOFLUSH);
/*发送命令*/
write(fd,wifi_order1,strlen(wifi_order1));
//ff = tcflush(fd,TCIOFLUSH);
// memset(ack,0,sizeof(ack));//清空字符数组
sleep(1);
/*接收回复数据*/
while (1)
{
int ret7;
ret7 = read(fd,ack,200);
if (ret7 > 0)
break;
}
if(strstr((char const*)ack,">") != NULL)
{
//ff = tcflush(fd,TCIOFLUSH);
write(fd,yaolan_close,7);
//sff = tcflush(fd,TCIOFLUSH);
while (1)
{
int ret8;
ret8 = read(fd,ack,200);
if (ret8 > 0)
break;
}
if(strstr((char const*)ack,"SEND OK") != NULL)
{
printf("yaolan close !!!\n\n");
break;
}
}
}
}
close(fd);
return NULL;
}
int main(void)
{
pthread_t tid;
pthread_create(&tid,NULL,wifi,NULL);//线程跑WIFI模块并接受数据
/*1、初始化lcd屏*/
lcd_init();
/*显示初始化界面*/
image_show(0,0,800,480,"./baby.bmp");
image_show1(40,220,350,80,80,"./play.bmp");
image_show1(40,470,350,80,78,"./play.bmp");
input();
/*解除映射*/
lcd_uninit();
return 0;
}
上一篇： java多客户端TCP连接应用
下一篇： sumo笔记（一）