#include "myuart.h"

int speed_arr[] = { B115200, B38400, B19200, B9600, B4800, B2400, B1200, B300 };
int name_arr[]  = {  115200,  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= 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("SetSpeed");  
				return;     
			}    
			tcflush(fd,TCIOFLUSH); 
			printf("set %s speed as %d\n",UARTPORT,name_arr[i]);  
		}  
	}
}

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_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
	options.c_cflag &= ~CSIZE;
	options.c_oflag  &= ~OPOST;

	switch (databits) /*设置数据位数*/
	{   
	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); /* 设置为奇效验*/  
			options.c_iflag |= INPCK;             /* Disnable parity checking */ 
			break;  
		case 'e':  
		case 'E':   
			options.c_cflag |= PARENB;     /* Enable parity */    
			options.c_cflag &= ~PARODD;   /* 转换为偶效验*/     
			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);  
		}  
	/* 设置停止位*/  
	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; 		 
	tcflush(fd,TCIFLUSH);
	options.c_cc[VTIME] = 150; //设置超时 
	options.c_cc[VMIN] = 0; 
	if (tcsetattr(fd,TCSANOW,&options) != 0)   
	{ 
		perror("SetupSerial 2");   
		return (FALSE);  
	} 
	printf("set %s as databits:%d parity:%d stopbits:%d\n",UARTPORT,databits,parity,stopbits);
	return (TRUE); 
}

int open_port(void)
{
  int fd; 
  fd = open(UARTPORT, O_RDWR | O_NOCTTY | O_NDELAY);
  if (fd == -1)
  {
    printf("open_port: Unable to open %s\n",UARTPORT);
	return (-1);
  }
  else
    //fcntl(fd, F_SETFL, 0);
	printf("open %s success\n",UARTPORT);
    return (fd);
}

//*************port-->fd=open(...)********************
//****************************************************