1.5.18: get strange characters from rs232-port on a Windows XP machine

[Moritz Herrmann <MoritzHerrmann05 at gmx dot de>]

Hi guys

I'm working on a little c program to receive and save strings from the 
serial-port into a local file on a Windows XP/2003 Server machine.
The program is working very well on a linux machine but if I try to run it 
under windows I just get stupid characters like:

0x11 â
0x6 â
0x7
0x1f â
0x7f â

what I really wanted to get is this:

0x2 â
0x4a J
0x55 U
0x53 S
0x54 T
0x49 I
0x4e N
0x20
0x54 T
0x49 I
0x4d M
0x42 B
0x45 E
0x52 R
0x4c L
0x41 A
0x4b K
0x45 E
0x20
0x2f /
0x20
0x52 R
0x6f o
0x63 c
0x6b k
0x20
0x79 y
0x6f o
0x75 u
0x72 r
0x20
0x62 b
0x6f o
0x64 d
0x79 y
0x3 â

but I only get the right chars when I open a windows Hyperterminal and close 
it before I start my program. 
After a week of searching around the internet you are my last hope.

the rs232.c file Is my program-code:

and cygcheck.out is the output of "cygcheck -s -v -r"

thank you for help

moe

Attachment: cygcheck.out
Description: Text document

// transportation of the playing Title of the "digitalen Campusradio bit eXpress" to the Internet

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#include <termios.h>
#include <stdio.h>
#include <unistd.h>

#include <time.h> 

// modem
#define MODEMDEVICE "com2"
//#define MODEMDEVICE "/dev/ttyS0"

// output-files
#define PLAY "aktuell.txt"
#define HISTORY "older.txt"

int main()
{
	// global variables
	int fd, result, start, pos;
	FILE *fd2, *fd3;
	char str[2], title[200];
	struct termios termios_p;
	time_t t;
	struct tm tm;

	// Modem 
	fd = open(MODEMDEVICE, O_RDWR | O_NOCTTY | O_NDELAY);
	if (fd == -1) {printf("could not open serialport"); return -1;};
	fcntl(fd, F_SETFL, 0);
	
	//get the current options
	tcgetattr(fd, &termios_p);

	cfsetispeed(&termios_p, B9600);
	cfsetospeed(&termios_p, B9600);
	termios_p.c_cflag |= (CLOCAL | CREAD);
	termios_p.c_cflag &= ~PARENB;	// parity no
	termios_p.c_cflag &= ~CSTOPB;	// stop bit 1
	termios_p.c_cflag &= ~CSIZE;	// Mask the character size bits
	termios_p.c_cflag |= CS8;	// Select 8 data bits
	termios_p.c_cflag &= ~CRTSCTS;	// disable hardware flow control
	termios_p.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);	// RAW Input
	termios_p.c_oflag &= ~OPOST;	// RAW output

	//set the options
	tcsetattr(fd, TCSANOW, &termios_p);
	tcflush(fd,TCIOFLUSH);
	
	start = 0;
	pos = 0;
	
	while(1) {
		result = read(fd, str, 1);
		if(result != -1) {
			printf("0x%x %c\n", str[0], str[0]);
			
			if(str[0] == 0x02) {start = 1; pos = 0;}
			
			else if (str[0] == 0x03) {start = 0;
				title[pos] = '\0';	
		
				// write to file fd2 (now playing title)
				fd2 = fopen(PLAY, "w");
				if (fd2 < 0) {printf("error open file %d\n"), PLAY; return -1;}
				fprintf(fd2, "%s", &title[2]);
				fclose(fd2);
				
				// write to file fd3 (history file)
				fd3 = fopen(HISTORY, "a");
				if (fd3 < 0) {printf("error open file %d\n"), HISTORY; return -1;}
				time(&t);
				localtime_r(&t, &tm);
				fprintf(fd3, "%d-%02d-%02d %02d:%02d:%02d %s\n", 1900 + tm.tm_year, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, &title[2]);
				fclose(fd3);
				
			} 
			else {if (start = 1) {title[pos++] = str[0];}}
		}
	}
}



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