A53開發板——WIFI（ESP8266）的應用例子
阿新 • • 發佈：2018-12-18
首先你得需要ESP8266得詳細資料，瞭解模式和AT指令
其餘程式碼中有詳細得註釋
#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;//用來儲存對映首地址 int lcd_fd;//螢幕的檔案描述符 int flag_music=0;//音樂開關描述符 0是暫停狀態 1是播放狀態 int flag_yaolan=0;//搖籃開關描述符 0是暫停狀態 1是開啟狀態 char Buf3[80]; char Buf2[80]; char Buf1[80]; /*初始化lcd屏*/ int lcd_init() { /*1、開啟螢幕檔案*/ lcd_fd = open("/dev/fb0",O_RDWR); if(lcd_fd == -1) { perror("oepn lcd error"); return -1; } /*2、對映*/ plcd = mmap(NULL, //對映地址，NULL表示讓系統自行選擇 800*480*4, //對映地址大小 PROT_READ|PROT_WRITE, //對映地址的許可權 MAP_SHARED, //對映標識位 lcd_fd, //檔案描述符，表示要對映的檔案 0); //檔案偏移量，0表示不偏移 } /*解除lcd*/ void lcd_uninit() { /*解除對映*/ munmap(plcd,800*480*4); close(lcd_fd); } /* 畫點函式 x/y 座標點的值 colour 顏色 */ void lcd_draw_point(int x,int y,int colour) { *(plcd + x + y*800) = colour; } /* 清屏函式 x0,y0 清屏的起始座標 w 清屏寬度 h 清屏高度 colour 顏色 */ 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); } } } /* 顯示影象 x0/y0 影象從哪開始顯示 w/h 影象的寬和高 file 要顯示的圖片名 */ int image_show(int x0,int y0,int w,int h,char *file) { int fd = open(file,O_RDONLY); //開啟圖片檔案 if(fd == -1) { printf("open failed!\n"); return -1; } char *buf = malloc(w*h*24/8); //去掉bmp前54位元組資訊頭 lseek(fd,54,SEEK_SET); read(fd, buf, w*h*24/8); //讀取畫素陣列 //組合顏色值，呼叫畫點函式顯示 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); //開啟圖片檔案 if(fd == -1) { printf("open failed!\n"); return -1; } char *buf = malloc(w*h*24/8); //去掉bmp前54位元組資訊頭 lseek(fd,54,SEEK_SET); read(fd, buf, w*h*24/8); //讀取畫素陣列 //組合顏色值，呼叫畫點函式顯示 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; //用來儲存輸入事件的結構體變數 int x,y,value; int x1,y1; while(1) { read(fd,&ev,sizeof(ev)); //獲取輸入事件 if(ev.type == EV_KEY ) { if(ev.code == BTN_TOUCH) { value = ev.value; //獲取壓力值 } } if(ev.type == EV_ABS) //判斷是不是觸控式螢幕事件 { if(ev.code == ABS_X) { x = ev.value; //x軸座標值 } if(ev.code == ABS_Y) { y = ev.value; // y軸座標值 } } 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) //表示手指離開時，xy座標在音樂區域 { 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) //表示手指離開時，xy座標在搖籃區域 { 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*/ } /* 初始化串列埠函式 file：表示要開啟的串列埠 bt：表示要設定的波特率 */ int serial_init(char *file,int bt) { int fd = open(file,O_RDWR); if(fd == -1) { perror("open serial error"); return -1; } /*設定串列埠屬性*/ struct termios myserial; memset(&myserial,0,sizeof(myserial)); //清空地址 myserial.c_cflag |= CLOCAL | CREAD; //設定本地連線，接受使能 myserial.c_cflag &= ~CSIZE; //清空資料位 myserial.c_cflag |= CS8; //設定資料位 8 myserial.c_cflag &= ~CSTOPB; //停止位1 myserial.c_cflag &= ~PARENB; //不要校驗位 myserial.c_cflag &= ~CRTSCTS; //不要硬體控制流 /*設定波特率*/ 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; } /*清空快取佇列*/ tcflush(fd,TCIOFLUSH); /*設定生效*/ tcsetattr(fd,TCSANOW,&myserial); return fd; } /* WIFI模組初始化函式 */ 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連線路由 char order3[]="AT+CIPSTART=\"TCP\",\"192.168.4.1\",6666\r\n";//連線伺服器 char ack[200]={0};//回覆資料包 int ff; while(1) { ff = tcflush(fd,TCIOFLUSH); printf("ff1 :%d\n",ff); while(1) { /*傳送命令*/ 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));//清空字元陣列 /*接收回複數據*/ 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); /*傳送命令*/ write(fd,order2,strlen(order2)); ff = tcflush(fd,TCIOFLUSH); memset(ack,0,sizeof(ack));//清空字元陣列 sleep(1); /*接收回複數據*/ 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); /*傳送命令*/ write(fd,order3,strlen(order3)); ff = tcflush(fd,TCIOFLUSH); memset(ack,0,sizeof(ack));//清空字元陣列 /*接收回複數據*/ 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); //開啟WIFI模組通訊串列埠 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傳送指令 char yaolan_open[7] = {0x3A,0x00,0x01,0x0A,0x00,0x31,0x23}; //搖籃 開啟命令 char yaolan_close[7] = {0x3A,0x00,0x01,0x0A,0x01,0x30,0x23}; //搖籃 關閉命令 char music_open[7] = {0x3A,0x00,0x01,0x0A,0x10,0x21,0x23}; //音樂 開啟命令 char music_close[7] = {0x3A,0x00,0x01,0x0A,0x11,0x20,0x23}; //音樂 關閉命令 char ack[200] = {0};//回覆資料包 char *pAddr1; char *pAddr2; char *pAddr3; unsigned char len1; unsigned char len2; unsigned char len3; while(1) { memset(ack,0,sizeof(ack));//清空字元陣列 /*接收回複數據*/ 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;//讀取資料的長度 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;//讀取資料的長度 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;//讀取資料的長度 pAddr1++; memcpy(Buf1,pAddr1,len1); printf("Buf1 : %s\n\n",Buf1); } } printf("flag_music : %d\n\n",flag_music); //音樂開關 if(flag_music == 1) { while(1) { //ff = tcflush(fd,TCIOFLUSH); /*傳送命令*/ write(fd,wifi_order1,strlen(wifi_order1)); //ff = tcflush(fd,TCIOFLUSH); //memset(ack,0,sizeof(ack));//清空字元陣列 sleep(1); /*接收回複數據*/ 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); /*傳送命令*/ write(fd,wifi_order1,strlen(wifi_order1)); //ff = tcflush(fd,TCIOFLUSH); //memset(ack,0,sizeof(ack));//清空字元陣列 sleep(1); /*接收回複數據*/ 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; } } } //搖籃開關 if(flag_yaolan == 1) { while(1) { //ff = tcflush(fd,TCIOFLUSH); /*傳送命令*/ write(fd,wifi_order1,strlen(wifi_order1)); //ff = tcflush(fd,TCIOFLUSH); // memset(ack,0,sizeof(ack));//清空字元陣列 sleep(1); /*接收回複數據*/ 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); /*傳送命令*/ write(fd,wifi_order1,strlen(wifi_order1)); //ff = tcflush(fd,TCIOFLUSH); // memset(ack,0,sizeof(ack));//清空字元陣列 sleep(1); /*接收回複數據*/ 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);//執行緒跑WIFI模組並接受資料 /*1、初始化lcd屏*/ lcd_init(); /*顯示初始化介面*/ 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(); /*解除對映*/ lcd_uninit(); return 0; }