Function for O over a serial.

[Metalgod4eva]

I am a happy computer programmer and well never played around with a robot before. Being a computer programmer I am use to the computer standard ways of doing things. I wrote this for the robot

 #include <stdio.h>
#define AMOUNT_OF_LINES 1
int reprint(void)
{
int i,x,r;
int farray[200],*fa;
FILE *fp;
fp = fopen("c:\\text3.txt", "r");
fa = &farray[0];

for(x=0;x<123;x++) 
{                 
                  
    *(fa+x) = (fgetc( fp ));
     printf("%s",fa+x);
}
fclose(fp);
}
int write(void)
{
 	  int c,x,i,y,n, *sp, string[200];  
      sp = &string[0];
 	  FILE *fp;
 	  fp=fopen("c:\\text3.txt", "w");
    
    for(x=0;x<3;x++){
      scanf("%s",sp+x); }
      for(n=0;n<3;n++) {
      fprintf(fp,"%s",sp+n); } 
      fclose(fp);
}
int main() {
   int x;
   write(); 
    reprint();
    scanf("%d",x);
    /* by metalgod4eva team 870 */
}
/*for loops not complete, still need to make another function */

Well as you can read its a nice file IO, I am looking to use the serial to O back to the computers hard drive and save and in looking in the source for the serial I found no O function back over its device. Maybe I just over looked it and its there or I will have to write it. If anyone has an idea or solution let me know. Also I think I might have to use fwrite instead of fprintf but no issues there. Dont complain if you do run it and find the garbage data I have not finished the fuction for the for loops yet. Thanks for your time and have a nice day!

[bear24rw]

The code for the robot isnt exactly like standard C for a computer, you might want to look at the default code

www.kevin.org/frc

And read the programming ref guide from IFI

http://www.ifirobotics.com/docs/lega...2-apr-2004.pdf

[chris31]

If I understand this is what you want. Just Printf all you info like you normally would. But write a custom app that reads those values and logs them to a text file. Is that what you want?

[Matt Krass]

Even simpler, forget a custom App, depending on the kind of data you're using a properly formatted printf(), Hyperterm and Excel are your best friend.

I had to monitor the PID response for last years robot and a bunch of numbers wasn't doing it for me, so I had a printf like this:

printf("%d,%d,%d,%d,%d",kp, ki, kd, error, output); // This is a loose guess at what it was

Then I told HyperTerm to save to a file, and let the robot run, then using Notepad++ (it handles large text files better than notepad does) I trimmed out the section I needed and imported to Excel as a CSV (Comma Separated Values) file. Then I re-saved to .xls and started graphing, thanks to Mark McLeod for that awesome tip.