#include "serial.h"


int serial_open(unsigned char* dev, unsigned int baud)
{
    int fd;
    fd = open(dev, O_RDWR|O_NOCTTY); 
    if (fd < 0) return fd;
    if(isatty(STDIN_FILENO)==0) 
      {
   	  printf("standard input is not a terminal device\n"); 
      }   
    else 
      {
	  printf("isatty success!\n"); 
      }

    struct termios newtio,oldtio; 
    if (tcgetattr( fd,&oldtio) != 0) 
      {  
          perror("SetupSerial 1");
	  printf("tcgetattr( fd,&oldtio) -> %d\n",tcgetattr( fd,&oldtio)); 
          return -1; 
      } 
    bzero( &newtio, sizeof( newtio ) ); 
    newtio.c_cflag  |=  CLOCAL | CREAD;  
    newtio.c_cflag |= CS8; 
    newtio.c_cflag &= ~PARENB; 

    switch( baud ) 
     { 
       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 230400: 
         cfsetispeed(&newtio, B230400); 
         cfsetospeed(&newtio, B230400); 
         break; 
       case 460800: 
         cfsetispeed(&newtio, B460800); 
         cfsetospeed(&newtio, B460800); 
         break; 
       default: 
         cfsetispeed(&newtio, B9600); 
         cfsetospeed(&newtio, B9600); 
         break; 
      } 
     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; 
       }
 
    return fd; 
}

void serial_close(int fd)
{
    close(fd);
}

int serial_read_data(int fd, unsigned char *val, int len)
{
    
	len=read(fd,val,len);
	return len;
    
}

int serial_write_data(int fd, unsigned char *val, int len)
{
	len=write(fd,val,len*sizeof(unsigned char));
	return len;
}