Reading Serial Data From C (OSX /dev/tty)

Question

I am trying to read data from a bluetooth barcode scanner (KDC300) using C. Here is the code I have so far, and the program successfully establishes a bluetooth connection to th

Answer 1

@tommieb75, the strcat statement was from the first "go" at the program, I took a variable from argv[1] and appended it to the /dev/tty.* so you could select which device you wanted to monitor.

I am not sure why I had commented out buf, probably stems from looking at the code too much / trying different approaches and forgetting where I was (not much of a C programmer, which is how I can get lost in 30 LOC).

@caf, Good catch on the extra semi-colon after the while loop, unfortunately, even after correcting it, the program doesn't behave correctly.

I am researching the problem further. I can verify (with osx packetlogger) that the computer is getting the data, but the but the buffer never has any data placed in it.

-Jud

---------------Edit--------------

I solved the problem after a little trial and error. Adding the following code to setup the serial connection solved everything:

struct termios theTermios;

memset(&theTermios, 0, sizeof(struct termios));
cfmakeraw(&theTermios);
cfsetspeed(&theTermios, 115200);

theTermios.c_cflag = CREAD | CLOCAL;     // turn on READ
theTermios.c_cflag |= CS8;
theTermios.c_cc[VMIN] = 0;
theTermios.c_cc[VTIME] = 10;     // 1 sec timeout
ioctl(fileDescriptor, TIOCSETA, &theTermios);

Thanks to the other answers for getting me to this point.