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  • Linux例子程序

    #include<stdio.h> #include<stdlib.h> #include<string.h> #include<sys/types.h> #include<sys/stat.h> #include<fcntl.h> #include<unistd.h> #include<termios.h> #include<string.h> int set_opt(int fd,int nSpeed, int nBits, char nEvent, int nStop) { struct termios newtio,oldtio; if ( tcgetattr( fd,&oldtio) != 0) { perror("SetupSerial 1"); return -1; } bzero( &newtio, sizeof( newtio ) ); newtio.c_cflag |= CLOCAL | CREAD; newtio.c_cflag &= ~CSIZE; switch( nBits ) { case 7: newtio.c_cflag |= CS7; break; case 8: newtio.c_cflag |= CS8; break; } switch( nEvent ) { case 'O': newtio.c_cflag |= PARENB; newtio.c_cflag |= PARODD; newtio.c_iflag |= (INPCK | ISTRIP); break; case 'E': newtio.c_iflag |= (INPCK | ISTRIP); newtio.c_cflag |= PARENB; newtio.c_cflag &= ~PARODD; break; case 'N': newtio.c_cflag &= ~PARENB; break; } switch( nSpeed ) { case 2400: cfsetispeed(&newtio, B2400); cfsetospeed(&newtio, B2400); break; case 4800: cfsetispeed(&newtio, B4800); cfsetospeed(&newtio, B4800); break; case 9600: cfsetispeed(&newtio, B9600); cfsetospeed(&newtio, B9600); break; case 115200: cfsetispeed(&newtio, B115200); cfsetospeed(&newtio, B115200); break; case 460800: cfsetispeed(&newtio, B460800); cfsetospeed(&newtio, B460800); break; default: cfsetispeed(&newtio, B9600); cfsetospeed(&newtio, B9600); break; } if( nStop == 1 ) newtio.c_cflag &= ~CSTOPB; else if ( nStop == 2 ) newtio.c_cflag |= CSTOPB; newtio.c_cc[VTIME] = 0; newtio.c_cc[VMIN] = 0; tcflush(fd,TCIFLUSH); if((tcsetattr(fd,TCSANOW,&newtio))!=0) { perror("com set error"); return -1; } // printf("set done!\n\r"); return 0; } int main(void) { int fd1,fd2,nset1,nset2,nread; char buf[100]; char buf1[1]; char *buff = "Hello\n\r"; fd1 = open( "/dev/ttySAC0", O_RDWR); if (fd1 == -1) exit(1); fd2 = open( "/dev/ttySAC1", O_RDWR); if (fd2 == -1) exit(1); nset1 = set_opt(fd1, 115200, 8, 'N', 1); if (nset2 == -1) exit(1); nset2 = set_opt(fd2, 4800, 8, 'N', 1); if (nset2 == -1) exit(1); while (1) { nread = read(fd2, buf, 1); if (nread > 0) write(fd1, buf, 1); nread = read(fd1, buf1,1); if(buf1[0] == 'q') break; } close(fd1); close(fd2); return 0; }

    2015-07-17
    2
  • appweb-2.4.2-2M-src

    web服务器搭建源码,嵌入式移植源码。支持arm,pc

    2015-01-18
    5
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