linux串列埠傳輸檔案
阿新 • • 發佈:2018-12-31
#include <stdlib.h> #include <stdio.h> #include <unistd.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <termios.h> #include <errno.h> #include <sys/time.h> #include <time.h> #define BUFFER_SIZE 16 #define FALSE -1 #define TRUE 1 int speed_arr[] = { B38400, B19200, B9600, B4800, B2400, B1200, B300, B38400, B19200, B9600, B4800, B2400, B1200, B300, }; int name_arr[] = {38400, 19200, 9600, 4800, 2400, 1200, 300, 38400, 19200, 9600, 4800, 2400, 1200, 300, }; void set_speed(int fd, int speed); int set_Parity(int fd,int databits,int stopbits,int parity); int main(int argc,char *argv[]) { char *interface = NULL,*filename = NULL; if (argc < 2) { interface = "/dev/ttyUSB0"; filename = "hello.txt" ; } else { interface = argv[1]; filename = argv[2]; } int fd=open(interface,O_RDWR|O_NOCTTY|O_NDELAY); if(fd == -1) { printf("%s Open Error!\n",interface); return -1; } printf("open %s successfully !",interface); set_speed(fd,19200); if (set_Parity(fd,8,1,'N')== FALSE) { printf("Set Parity Error\n"); exit(1); } int fp = open(filename,O_RDWR); if ( fp == -1 ) { printf("open %s failured\n",filename); return -1; } int nread = 1; char buffer[BUFFER_SIZE] = {'\0'}; int sum = 0; while(nread > 0) { int nwrite = 0; int tmp = 0,pos=0; nread = read(fp,buffer,BUFFER_SIZE); //一次要寫進去的位元組數 printf("讀取位元組數 : %d bytes \n",nread); int size_write = nread; //size_write是要本次要寫入的總位元組數 while (size_write > 0) { // int pos = 0>=nwrite?0:nwrite ; //偏移 // printf("pos = %d\n",pos); tmp = (nwrite > tmp)? nwrite : tmp; // pos = tmp ; //printf("tmp = %d,pos %d \n",tmp,pos); nwrite = write(fd,buffer + pos,size_write); //nwrite一次寫進去的位元組數 if (nwrite == -1) { sleep (2); continue; } sum = sum + nwrite; //nwrite 8 printf("寫入位元組數 : %d,剩餘位元組數 : %d \n",sum,size_write); size_write = size_write-nwrite; //剩下要寫進去的位元組數 } } printf("sussfully write %s\n",filename); close(fp); close(fd); return 0; } void set_speed(int fd, int speed) { int i; int status; struct termios Opt; tcgetattr(fd, &Opt); for ( i= 0; i < sizeof(speed_arr) / sizeof(int); i++) { if (speed == name_arr[i]) { tcflush(fd, TCIOFLUSH); cfsetispeed(&Opt, speed_arr[i]); cfsetospeed(&Opt, speed_arr[i]); status = tcsetattr(fd, TCSANOW, &Opt); if (status != 0) { perror("tcsetattr fd1"); return; } } tcflush(fd,TCIOFLUSH); } } int set_Parity(int fd,int databits,int stopbits,int parity) { struct termios options; if (tcgetattr( fd,&options) != 0) { perror("SetupSerial 1"); return(FALSE); } options.c_cflag &= ~CSIZE; switch (databits) /*設定資料位數*/ { case 7: options.c_cflag |= CS7; break; case 8: options.c_cflag |= CS8; break; default: fprintf(stderr,"Unsupported data size\n"); return (FALSE); } switch (parity) { case 'n': case 'N': options.c_cflag &= ~PARENB; /* Clear parity enable */ options.c_iflag &= ~INPCK; /* Enable parity checking */ break; case 'o': case 'O': options.c_cflag |= (PARODD | PARENB); /* 設定為奇效驗*/ options.c_iflag |= INPCK; /* Disnable parity checking */ break; case 'e': case 'E': options.c_cflag |= PARENB; /* Enable parity */ options.c_cflag &= ~PARODD; /* 轉換為偶效驗*/ options.c_iflag |= INPCK; /* Disnable parity checking */ break; case 'S': case 's': /*as no parity*/ options.c_cflag &= ~PARENB; options.c_cflag &= ~CSTOPB; break; default: fprintf(stderr,"Unsupported parity\n"); return (FALSE); } /* 設定停止位*/ switch (stopbits) { case 1: options.c_cflag &= ~CSTOPB; break; case 2: options.c_cflag |= CSTOPB; break; default: fprintf(stderr,"Unsupported stop bits\n"); return (FALSE); } /* Set input parity option */ if (parity != 'n') options.c_iflag |= INPCK; options.c_cc[VTIME] = 150; // 15 seconds options.c_cc[VMIN] = 0; tcflush(fd,TCIFLUSH); /* Update the options and do it NOW */ if (tcsetattr(fd,TCSANOW,&options) != 0) { perror("SetupSerial 3"); return (FALSE); } return (TRUE); }
read.c
#include <stdlib.h> #include <stdio.h> #include <unistd.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <termios.h> #include <errno.h> #include <sys/time.h> #include <time.h> #define BUFFER_SIZE 16 #define MAX 1024 #define FALSE -1 #define TRUE 1 int speed_arr[] = { B38400, B19200, B9600, B4800, B2400, B1200, B300, B38400, B19200, B9600, B4800, B2400, B1200, B300, }; int name_arr[] = {38400, 19200, 9600, 4800, 2400, 1200, 300, 38400, 19200, 9600, 4800, 2400, 1200, 300, }; void set_speed(int fd, int speed); int set_Parity(int fd,int databits,int stopbits,int parity); int main(int argc,char *argv[]) { char *interface = NULL,*filename = NULL; if (argc < 2) { interface = "/dev/ttyACM0"; filename = "hello.txt" ; } else { interface = argv[1]; filename = argv[2]; } int fd=open(interface,O_RDWR|O_NOCTTY|O_NDELAY); if(fd == -1) { printf("%s Open Error!\n",interface); return -1; } printf("open %s successfully !",interface); set_speed(fd,19200); if (set_Parity(fd,8,1,'N')== FALSE) { printf("Set Parity Error\n"); exit(1); } int fp = open(filename,O_RDWR|O_CREAT); if ( fp == -1 ) { printf("open %s failured\n",filename); return -1; } int nread = 1,nwrite = 0; char buffer[BUFFER_SIZE] = {'\0'}; while(1) { nread = read(fd,buffer,BUFFER_SIZE); if (nread > 0) { // printf("讀取 %d bytes \n",nread); nwrite = write(fp,buffer,nread); // printf("寫入 %d bytes \n",nwrite); if (nwrite <= 0) { printf("write into file finished n"); break; } } } printf("sussfully get %s\n",filename); return 0; } void set_speed(int fd, int speed) { int i; int status; struct termios Opt; tcgetattr(fd, &Opt); for ( i= 0; i < sizeof(speed_arr) / sizeof(int); i++) { if (speed == name_arr[i]) { tcflush(fd, TCIOFLUSH); cfsetispeed(&Opt, speed_arr[i]); cfsetospeed(&Opt, speed_arr[i]); status = tcsetattr(fd, TCSANOW, &Opt); if (status != 0) { perror("tcsetattr fd1"); return; } } tcflush(fd,TCIOFLUSH); } } int set_Parity(int fd,int databits,int stopbits,int parity) { struct termios options; if (tcgetattr( fd,&options) != 0) { perror("SetupSerial 1"); return(FALSE); } options.c_cflag &= ~CSIZE; switch (databits) /*設定資料位數*/ { case 7: options.c_cflag |= CS7; break; case 8: options.c_cflag |= CS8; break; default: fprintf(stderr,"Unsupported data size\n"); return (FALSE); } switch (parity) { case 'n': case 'N': options.c_cflag &= ~PARENB; /* Clear parity enable */ options.c_iflag &= ~INPCK; /* Enable parity checking */ break; case 'o': case 'O': options.c_cflag |= (PARODD | PARENB); /* 設定為奇效驗*/ options.c_iflag |= INPCK; /* Disnable parity checking */ break; case 'e': case 'E': options.c_cflag |= PARENB; /* Enable parity */ options.c_cflag &= ~PARODD; /* 轉換為偶效驗*/ options.c_iflag |= INPCK; /* Disnable parity checking */ break; case 'S': case 's': /*as no parity*/ options.c_cflag &= ~PARENB; options.c_cflag &= ~CSTOPB; break; default: fprintf(stderr,"Unsupported parity\n"); return (FALSE); } /* 設定停止位*/ switch (stopbits) { case 1: options.c_cflag &= ~CSTOPB; break; case 2: options.c_cflag |= CSTOPB; break; default: fprintf(stderr,"Unsupported stop bits\n"); return (FALSE); } /* Set input parity option */ if (parity != 'n') options.c_iflag |= INPCK; options.c_cc[VTIME] = 150; // 15 seconds options.c_cc[VMIN] = 0; tcflush(fd,TCIFLUSH); /* Update the options and do it NOW */ if (tcsetattr(fd,TCSANOW,&options) != 0) { perror("SetupSerial 3"); return (FALSE); } return (TRUE); }