/****************************************************************************
* *
* Copyright (c) 2004 - 2006 Winbond Electronics Corp. All rights reserved. *
* *
****************************************************************************/
/****************************************************************************
*
* FILENAME
* uart_test.c
*
* VERSION
* 1.0
*
* DESCRIPTION
* This is the test program used to test the UARTs on POS-TAX Board
*
* DATA STRUCTURES
* None
*
* FUNCTIONS
* None
*
* HISTORY
* 09/05/2005 Ver 1.0 Created by PC34 MCLi
*
* REMARK
* None
****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#include <errno.h>
#define FALSE 0
#define TRUE 1
/***@brief set serial com baudrate
*@param fd type int the file handle of the opened serial port
*@param speed type int the serial port speed
*@return void*/
int speed_arr[] = { B38400, B19200, B9600, B4800, B2400, B1200, B300,
B38400, B19200, B9600, B4800, B2400, B1200, B300,B115200 };
int name_arr[] = {38400, 19200, 9600, 4800, 2400, 1200, 300,
38400, 19200, 9600, 4800, 2400, 1200, 300,115200 };
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);
}
}
/**
*@brief Set data bit,stop bit and parity bit
*@param fd type int the file handle of the opened serial port
*@param databits type int data bits value: 7 or 8
*@param stopbits type int stop bit value: 1 or 2
*@param parity type int check bit value:N,E,O,,S
*/
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) /*Set the bits of the data*/
{
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); /* Set the parity bit*/
options.c_iflag |= INPCK; /* Disnable parity checking */
break;
case 'e':
case 'E':
options.c_cflag |= PARENB; /* Enable parity */
options.c_cflag &= ~PARODD; /* change to EVEN parity*/
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);
}
/* Set stop bit*/
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;
options.c_lflag &= ~(ICANON | ECHO) ;
tcflush(fd,TCIFLUSH); /* Update the options and do it NOW */
if (tcsetattr(fd,TCSANOW,&options) != 0)
{
perror("SetupSerial 3");
return (FALSE);
}
return (TRUE);
}
/**
*@breif Open the serial port
*/
int OpenDev(char *Dev)
{
int fd = open( Dev, O_RDWR ); //| O_NOCTTY | O_NDELAY
if (-1 == fd)
{ /*Set the Data bits*/
perror("Can't Open Serial Port");
return -1;
}
else
return fd;
}
/**
*@breif main()
*/
int main(int argc, char **argv)
{
int fd,i;
int nwrite;
char buff[512];
char rcv[32];
char *dev1 ="/dev/ttyS1";
fd = OpenDev(dev1);
if (fd>0)
set_speed(fd,115200);
else
{
printf("Can't Open Serial Port 1!\n");
exit(0);
}
if (set_Parity(fd,8,1,'N')== FALSE)
{
printf("Set Parity Error\n");
exit(1);
}
for(i=0;i<20;i++)
{
write(fd,"Hello World!",13);
sleep(1);
}
for(i=0;i<5;i++)
{
read(fd,rcv,8);
printf("\n");
write(fd,rcv,8);
printf("\n");
}
// nwrite = write(fd,buff,512);
// printf("Sent %d Bytes\n\n",nwrite);
close(fd);
return 0;
}
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