串口备份

串口备份

#include <stdio.h>#include <stdlib.h>#include <string.h>#include <dlfcn.h>#include <mysql/mysql.h>#include "uart.h"#define BUF_SIZE 1024  int main(void)  {      int fd,res;      char buf[BUF_SIZE];      char buff[BUF_SIZE];      fd_set inset,tempset;      struct timeval tv;      FD_ZERO(&inset);      //1. 打开串口            if((fd = open_uart(1)) < 0)          {              perror("open port");              return -1;          }      if(set_uart_config(fd,115200,8,'N',1) < 0)          {              perror("set com_config");              return -1;          }      FD_SET(fd,&inset);      tv.tv_sec = 5;      tv.tv_usec = 0;      do{          tempset = inset;  #if 0        printf("Please input some data(quit to exit)\n");          memset(buf,0,BUF_SIZE);          if(fgets(buf,BUF_SIZE,stdin) == NULL)              {                  perror("input error");                  break;              }                 write(fd,buf,strlen(buf));  #endif        memset(buff,0,BUF_SIZE);          tv.tv_sec = 5;          tv.tv_usec = 0;          res = select(fd + 1,&tempset,NULL,NULL,&tv);           if(res == 0)             write(fd,"是收到水电费水电费\r\n",strlen("是收到水电费水电费\r\n"));            //printf("time out 怎么办 \n");          else if (res < 0)              printf("select error\n");          else          {              if(FD_ISSET(fd,&inset))            //if(1)            {                int rx_length = read(fd,buff,BUF_SIZE);                if(rx_length > 0){                  buff[rx_length] = '\0';                  //write(fd,buff,BUF_SIZE);                  printf("%d  from uart:%s\r\n",rx_length,buff);                 }              }         }      }while(1 );      close(fd);      return 0;     } #if 0#include <stdio.h>#include <unistd.h>#include <fcntl.h>#include <termios.h>int main(){    int fd = -1;    fd = open("/dev/ttyS1", O_RDWR | O_NOCTTY | O_NDELAY);    if (fd == -1)    {        perror("Open Serial Port Error!\n");        return -1;    }    struct termios options;    tcgetattr(fd, &options);    //115200, 8N1    options.c_cflag = B115200 | CS8 | CLOCAL | CREAD;    options.c_iflag = IGNPAR;    options.c_oflag = 0;    options.c_lflag = 0;    options.c_cc[VTIME]=0;    options.c_cc[VMIN]=1;    tcflush(fd, TCIFLUSH);    tcsetattr(fd, TCSANOW, &options);    unsigned char rx_buffer[256];    while(1){        int rx_length = read(fd, (void*)rx_buffer, 255);        if (rx_length > 0)        {            //Bytes received            rx_buffer[rx_length] = '\0';            printf("%i bytes read : %s\n", rx_length, rx_buffer);            write(fd,"是收到水电费水电费\r\n",strlen("是收到水电费水电费\r\n"));            //tcflush(fd, TCIFLUSH);           }    }    close(fd);    return 0;}#endif