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load data from file
Posted: Tue May 02, 2023 8:14 am
by IvanSiberia
I have a code that requests data from a file on drive C.
Code: Select all
double Scan_file_ProbeXYZ(void)
{
FILE *f;
char s[256];
double cnt = 0;
f = fopen("C:\\temp\\kflopProbeXYZ.txt", "rt");
if (!f)
{
printf("Unable to open file\n");
return;
}
while (!feof(f))
{
fgets(s, 100, f);
if (!feof(f))
{
cnt++;
}
}
fclose(f);
return cnt;
}
As I understand it, the program each time loads a new line from the KMotion. How can this process be accelerated?
Re: load data from file
Posted: Tue May 02, 2023 10:50 pm
by TomKerekes
Hi Ivan,
That method was not designed to work with large amounts of data. File data is mixed between status requests which occurs only a few times per second. So only a few lines of data per second.
Lines can be up to 1024 characters long so using a format with long lines with increase throughput correspondingly.
Otherwise you might create a PC Program to download the file to the KFLOP Gather Buffer. This will have a much higher rate. See the Download Waveform Example.
HTH
Re: load data from file
Posted: Mon Jul 10, 2023 4:21 pm
by IvanSiberia
Hi Tom! I tried using buffer. As far as I understand it is used inside kmotion to pass parameters to kflop. gather_buffer[0] is losing my values. From what address can I correctly use the buffer?
Re: load data from file
Posted: Mon Jul 10, 2023 4:32 pm
by TomKerekes
Hi Ivan,
KMotion should only use the gather_buffer if a Step Response Plot is made. The gather_buffer is one million doubles long. If you limit any Step Response Plots to 1.5 seconds or less the last half of the gather_buffer should not be used.
HTH
Re: load data from file
Posted: Tue Jul 11, 2023 2:16 am
by IvanSiberia
Strange, but my Step Response Plot is not enabled, and the data has changed. Could this be related to the m100 commands?
Re: load data from file
Posted: Tue Jul 11, 2023 11:15 pm
by TomKerekes
Hi Ivan,
Not unless your M100 Program changes it.
Do you do realize the memory will be lost if KFLOP looses power?