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| #include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <termios.h>
#include <unistd.h>
#include <sys/ioctl.h>
#define RX_MSG_MAX_LEN 512
#define RX_DATA_FILE_MAX_LEN 512
#define RX_LOCK_FILE_MAX_LEN 512
static void CreateRxDataFile(char *FileName, char *Data);
static int LockFileExists(char *FileName);
static void CreateLockFile(char *FileName);
int main(int argc,char** argv)
{
struct termios tio;
struct termios stdio;
struct termios old_stdio;
int tty_fd, Idx = 0, Ret, ExitVal = 1;
char RxMsg[RX_MSG_MAX_LEN + 1];
char RxDataFile[RX_DATA_FILE_MAX_LEN + 1];
char RxLockFile[RX_DATA_FILE_MAX_LEN + 1];
unsigned char c = 'D';
if(argc < 5)
{
printf("Please start with %s /dev/ttyS1 19200 rxdata.txt lock.txt (for example)\n", argv[0]);
}
else
{
strncpy(RxDataFile, argv[3], RX_DATA_FILE_MAX_LEN);
printf("RxDataFile=%s\n", RxDataFile);
strncpy(RxLockFile, argv[4], RX_LOCK_FILE_MAX_LEN);
printf("RxLockFile=%s\n", RxLockFile);
tcgetattr(STDOUT_FILENO, &old_stdio);
memset(&stdio, 0, sizeof(stdio));
stdio.c_iflag = 0;
stdio.c_oflag = 0;
stdio.c_cflag = 0;
stdio.c_lflag = 0;
stdio.c_cc[VMIN] = 1;
stdio.c_cc[VTIME] = 0;
tcsetattr(STDOUT_FILENO, TCSANOW, &stdio);
tcsetattr(STDOUT_FILENO, TCSAFLUSH, &stdio);
fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK); /* make the reads non-blocking */
memset(&tio, 0, sizeof(tio));
tio.c_iflag = 0;
tio.c_oflag = 0;
tio.c_cflag = CS8 | CREAD | CLOCAL; /* 8n1, see termios.h for more information */
tio.c_lflag = 0;
tio.c_cc[VMIN] = 1;
tio.c_cc[VTIME] = 5;
tty_fd=open(argv[1], O_RDWR | O_NONBLOCK);
if(!strcmp(argv[2], "115200"))
{
cfsetospeed(&tio, B115200); /* 115200 baud */
cfsetispeed(&tio, B115200); /* 115200 baud */
}
else if(!strcmp(argv[2], "57600"))
{
cfsetospeed(&tio, B57600); /* 57600 baud */
cfsetispeed(&tio, B57600); /* 57600 baud */
}
else if(!strcmp(argv[2], "38400"))
{
cfsetospeed(&tio, B38400); /* 38400 baud */
cfsetispeed(&tio, B38400); /* 38400 baud */
}
else if(!strcmp(argv[2], "19200"))
{
cfsetospeed(&tio, B19200); /* 19200 baud */
cfsetispeed(&tio, B19200); /* 19200 baud */
}
else if(!strcmp(argv[2], "9600"))
{
cfsetospeed(&tio, B9600); /* 9600 baud */
cfsetispeed(&tio, B9600); /* 9600 baud */
}
else if(!strcmp(argv[2], "4800"))
{
cfsetospeed(&tio, B4800); /* 4800 baud */
cfsetispeed(&tio, B4800); /* 4800 baud */
}
else if(!strcmp(argv[2], "2400"))
{
cfsetospeed(&tio, B2400); /* 2400 baud */
cfsetispeed(&tio, B2400); /* 2400 baud */
}
else if(!strcmp(argv[2], "1200"))
{
cfsetospeed(&tio, B1200); /* 1200 baud */
cfsetispeed(&tio, B1200); /* 1200 baud */
}
else
{
/* default is 115200 */
cfsetospeed(&tio, B115200); /* 115200 baud */
cfsetispeed(&tio, B115200); /* 115200 baud */
}
tcsetattr(tty_fd, TCSANOW, &tio);
while (c != 'q')
{
/* if (read(tty_fd,&c,1)>0) write(STDOUT_FILENO,&c,1); if new data is available on the serial port, print it out */
Ret = 0;
if (read(tty_fd, &c, 1) > 0)
{
if( ((c == 10) && Idx) || ((c == 13) && Idx) || (Idx >= RX_MSG_MAX_LEN))
{
RxMsg[Idx] = 0;
Idx = 0;
Ret = 1;
}
else
{
if((c != 10) && (c != 13))
{
RxMsg[Idx] = c;
Idx++;
}
}
}
if(Ret)
{
Ret = 0;
printf("Rx: '%s'\n\r", RxMsg);
while(LockFileExists(RxLockFile))
{
usleep(5);/* Wait until calc reads the data.txt file and removes the lock.txt file. */
#if 1
if(read(STDIN_FILENO, &c, 1) > 0) /* Allow to quit with q in the console */
{
if(c == '&') break;
}
#endif
}
CreateRxDataFile(RxDataFile, RxMsg);
CreateLockFile(RxLockFile);
}
usleep(5);
if (read(STDIN_FILENO, &c, 1) > 0) Ret = write(tty_fd,&c,1); /* if new data is available on the console, send it to the serial port */
}
close(tty_fd);
tcsetattr(STDOUT_FILENO, TCSANOW, &old_stdio);
ExitVal = 0;
}
return ExitVal;/* EXIT_SUCCESS; */
}
static void CreateRxDataFile(char *FileName, char *Data)
{
FILE *f;
f = fopen(FileName, "w");
if (f == NULL)
{
printf("Error opening file!\n");
return;
}
/* print some text */
fprintf(f, "%s\n", Data);
/* Do not forget to close the file */
fclose(f);
}
static void CreateLockFile(char *FileName)
{
FILE *f;
f = fopen(FileName, "w");
if (f == NULL)
{
printf("Error opening lock file!\n");
return;
}
/* print some text */
fprintf(f, "%s\n", "DataAvailable");
/* Do not forget to clode the file */
fclose(f);
}
static int LockFileExists(char *FileName)
{
FILE *fp;
int Exists = 1;
fp = fopen(FileName, "r");
if (fp == NULL) {
Exists = 0;
}
else
fclose(fp);
return(Exists);
} |
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