📄 main_c.mht
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Date: Wed, 11 Jul 2007 21:19:58 +0800
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<BODY><PRE>#include <stdio.h> =
/*=B1=EA=D7=BC=CA=E4=C8=EB=CA=E4=B3=F6=B6=A8=D2=E5*/
#include <stdlib.h> =
/*=B1=EA=D7=BC=BA=AF=CA=FD=BF=E2=B6=A8=D2=E5*/
#include <unistd.h> =
/*Unix=B1=EA=D7=BC=BA=AF=CA=FD=B6=A8=D2=E5*/
#include <sys/types.h> /**/
#include <sys/stat.h> /**/
#include <fcntl.h> =
/*=CE=C4=BC=FE=BF=D8=D6=C6=B6=A8=D2=E5*/
#include <termios.h> =
/*PPSIX=D6=D5=B6=CB=BF=D8=D6=C6=B6=A8=D2=E5*/
#include <errno.h> /*=B4=ED=CE=F3=BA=C5=B6=A8=D2=E5*/
/***@brief =C9=E8=D6=C3=B4=AE=BF=DA=CD=A8=D0=C5=CB=D9=C2=CA
*@param fd =C0=E0=D0=CD int =
=B4=F2=BF=AA=B4=AE=BF=DA=B5=C4=CE=C4=BC=FE=BE=E4=B1=FA
*@param speed =C0=E0=D0=CD int =B4=AE=BF=DA=CB=D9=B6=C8
*@return void*/
int speed_arr[] =3D { B38400, B19200, B9600, B4800, B2400, B1200, B300,
B38400, B19200, B9600, B4800, B2400, B1200, B300, };
int name_arr[] =3D {38400, 19200, 9600, 4800, 2400, 1200, 300,
38400, 19200, 9600, 4800, 2400, 1200, 300, };
void set_speed(int fd, int speed)
{
int i;
int status;
struct termios Opt;
tcgetattr(fd, &Opt);
for ( i=3D 0; i < sizeof(speed_arr) / sizeof(int); i++)
{
if (speed =3D=3D name_arr[i])
{
tcflush(fd, TCIOFLUSH);
cfsetispeed(&Opt, speed_arr[i]);
cfsetospeed(&Opt, speed_arr[i]);
status =3D tcsetattr(fd, TCSANOW, &Opt);
if (status !=3D 0)
perror("tcsetattr fd1");
return;
}
tcflush(fd,TCIOFLUSH);
}
}
/**
*@brief =
=C9=E8=D6=C3=B4=AE=BF=DA=CA=FD=BE=DD=CE=BB=A3=AC=CD=A3=D6=B9=CE=BB=BA=CD=D0=
=A7=D1=E9=CE=BB
*@param fd =C0=E0=D0=CD int =
=B4=F2=BF=AA=B5=C4=B4=AE=BF=DA=CE=C4=BC=FE=BE=E4=B1=FA*
*@param databits =C0=E0=D0=CD int =CA=FD=BE=DD=CE=BB =C8=A1=D6=B5 =
=CE=AA 7 =BB=F2=D5=DF8*
*@param stopbits =C0=E0=D0=CD int =CD=A3=D6=B9=CE=BB =
=C8=A1=D6=B5=CE=AA 1 =BB=F2=D5=DF2*
*@param parity =C0=E0=D0=CD int =D0=A7=D1=E9=C0=E0=D0=CD =
=C8=A1=D6=B5=CE=AAN,E,O,,S
*/
int set_Parity(int fd,int databits,int stopbits,int parity)
{
struct termios options;
if ( tcgetattr( fd,&options) !=3D 0)
{
perror("SetupSerial 1");
return(FALSE);
}
options.c_cflag &=3D ~CSIZE;
switch (databits) /*=C9=E8=D6=C3=CA=FD=BE=DD=CE=BB=CA=FD*/
{
case 7:
options.c_cflag |=3D CS7;
break;
case 8:
options.c_cflag |=3D CS8;
break;
default:
fprintf(stderr,"Unsupported data size\n");
return (FALSE);
}
switch (parity)
{
case 'n':
case 'N':
options.c_cflag &=3D ~PARENB; /* Clear parity enable */
options.c_iflag &=3D ~INPCK; /* Enable parity checking */
break;
case 'o':
case 'O':
options.c_cflag |=3D (PARODD | PARENB); /* =
=C9=E8=D6=C3=CE=AA=C6=E6=D0=A7=D1=E9*/=20
options.c_iflag |=3D INPCK; /* Disnable parity checking */
break;
case 'e':
case 'E':
options.c_cflag |=3D PARENB; /* Enable parity */
options.c_cflag &=3D ~PARODD; /* =
=D7=AA=BB=BB=CE=AA=C5=BC=D0=A7=D1=E9*/ =20
options.c_iflag |=3D INPCK; /* Disnable parity checking */
break;
case 'S':
case 's': /*as no parity*/
options.c_cflag &=3D ~PARENB;
options.c_cflag &=3D ~CSTOPB;
break;
default:
fprintf(stderr,"Unsupported parity\n");
return (FALSE);
}
/* =C9=E8=D6=C3=CD=A3=D6=B9=CE=BB*/ =20
switch (stopbits)
{
case 1:
options.c_cflag &=3D ~CSTOPB;
break;
case 2:
options.c_cflag |=3D CSTOPB;
break;
default:
fprintf(stderr,"Unsupported stop bits\n");
return (FALSE);
}
/* Set input parity option */
if (parity !=3D 'n')
options.c_iflag |=3D INPCK;
options.c_cc[VTIME] =3D 150; // 15 seconds
options.c_cc[VMIN] =3D 0;
tcflush(fd,TCIFLUSH); /* Update the options and do it NOW */
if (tcsetattr(fd,TCSANOW,&options) !=3D 0)
{
perror("SetupSerial 3");
return (FALSE);
}
return (TRUE);
}
/**
*@breif =B4=F2=BF=AA=B4=AE=BF=DA
*/
int OpenDev(char *Dev)
{
int fd =3D open( Dev, O_RDWR ); //| O_NOCTTY | O_NDELAY
if (-1 =3D=3D fd)
{ /*=C9=E8=D6=C3=CA=FD=BE=DD=CE=BB=CA=FD*/
perror("Can't Open Serial Port");
return -1;
}
else
return fd;
}
/**
*@breif main()
*/
int main(int argc, char **argv)
{
int fd;
int nread;
char buff[512];
char *dev =3D"/dev/ttyS1";
fd =3D OpenDev(dev);
if (fd>0)
set_speed(fd,19200);
else
{
printf("Can't Open Serial Port!\n");
exit(0);
}
if (set_Parity(fd,8,1,'N')=3D=3D FALSE)
{
printf("Set Parity Error\n");
exit(1);
}
while(1)
{
while((nread =3D read(fd,buff,512))>0)
{
printf("\nLen %d\n",nread);
buff[nread+1]=3D'\0';
printf("\n%s",buff);
}
}
//close(fd);
//exit(0);
}
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