Thread: Reading values from text file

So Im trying to read some variables from a text file - stored like this:

2.503, 0.500, 1.200, 2.693, 4.325, 6.131, 8.125, 5.000, 21.000
2.503, 0.500, 1.200, 2.693, 4.325, 6.131, 8.125, 4.938, 21.000

The second last value has varied, see?
Here is my code

Code:

if ( &file1 != NULL )
   {
	while(f_gets(buffer, sizeof(buffer), &file1)!= NULL)
    {
     res = sscanf(buffer, "%lf, %lf, %lf, %lf, %lf, %lf, %lf, %lf, %lf\n", &data[0],&data[1],&data[2],&data[3],&data[4],&data[5],&data[6],&data[7],&data[8]); 

        printf_P(PSTR("data: "));
		printf("%.3f, %.3f, %.3f, %.3f, %.3f, %.3f, %.3f, %.3f, %.3f\n", data[0],data[1],data[2],data[3],data[4],data[5],data[6],data[7],data[8]); 
    } 
    f_close(&file1);

I know its not quite how it would be done on C on a pc - im programming a microcontroller, so the filesystem commands are very slightly different.
It works to a certain degree - I get this back

data: 2.503, 0.500, 1.200, 2.693, 4.325, 6.131, 8.125, 4.938, 21.000
data: 2.503, 0.500, 1.200, 2.693, 4.325, 6.131, 8.125, 4.938, 21.000

In other words, its reading the last line fine, but doesnt get the first. Any idea what tells the code to grab each line, rather than only the last one?

Originally Posted by a.mlw.walker

Oh yep. res = 0.

This result implies it is printing the last line twice.

The result should be the number of items the scanf read.

Tim S.