LabWindows/CVI
How to view the curve of the past on Strip Chart ?
Hi !
Thank you very much for your guidance!
Unfortunately.there is no
ATTR_STRIP_CHART_PAUSED
in my CVI.When I put this in my programm,it occurs error.
I used to read all datas and plot them on graph.But it's always crashing.When the .txt file is more than 400kb,the whole programm could crash.
This is my code beloe:
static char buf[1024];
static struct tm ti;
double *wj = NULL, *mv = NULL, *ma = NULL, *et= NULL ;
double *c1 = NULL, *c2 = NULL, *c3 = NULL,*c4 = NULL, *c5 = NULL;
int CVICALLBACK FhCallbck (int panel, int control, int event,
void *callbackData, int eventData1, int eventData2)
{
int cnt = 0, aSize = 30000,fH = 0;
int r = 0;
switch (event)
{
case EVENT_COMMIT:
// Initial array dimensioning
c1 = malloc (aSize * sizeof (double));
c2 = malloc (aSize * sizeof (double));
c3 = malloc (aSize * sizeof (double));
c4 = malloc (aSize * sizeof (double));
c5 = malloc (aSize * sizeof (double));
et = malloc (aSize * sizeof (double));
fH = OpenFile ("yb.txt", VAL_READ_ONLY, VAL_OPEN_AS_IS, VAL_ASCII);
while (1) {
r = ReadLine (fH, buf, 511);
if (r == -2) break;
if (!strlen (buf)) goto loop; // Do not scan empty lines
// Parse line read and fill the array
Scan (buf, "%d[x]%d[x]%d[x]%d[x]%d[x]%d[x]%s[dt#]%f[x]%s[dt#]%f[x]%s[dt#]%f[x]%s[dt#]%f[x]%s[dt#]%f",
&ti.tm_mon, &ti.tm_mday, &ti.tm_year, &ti.tm_hour, &ti.tm_min, &ti.tm_sec, &c1[cnt], &c2[cnt], &c3[cnt], &c4[cnt], &c5[cnt]);
// Adjust fields for tm struct correct format
ti.tm_mon--; ti.tm_year -= 1900;
// Calculate timestamp
et[cnt] = mktime (&ti);
// Check array size and increase if needed
if (++cnt > aSize) {
aSize += 500; // Increase array size
// Further memory allocation
c1 = realloc (wj, aSize * sizeof (double));
c2 = realloc (mv, aSize * sizeof (double));
c3 = realloc (ma, aSize * sizeof (double));
c4 = realloc (mv, aSize * sizeof (double));
c5 = realloc (ma, aSize * sizeof (double));
et = realloc (ma, aSize * sizeof (double));
}
loop: ;
}
CloseFile (fH);
PlotXY (ybppanelHandle, PANEL_YBP_GRAPH_CO2, et, c1, cnt, VAL_DOUBLE, VAL_DOUBLE, VAL_THIN_LINE, VAL_EMPTY_SQUARE, VAL_SOLID, 1, VAL_RED);
PlotXY (ybppanelHandle, PANEL_YBP_GRAPH_O2, et, c2, cnt, VAL_DOUBLE, VAL_DOUBLE, VAL_THIN_LINE, VAL_EMPTY_SQUARE, VAL_SOLID, 1, VAL_RED);
PlotXY (ybppanelHandle, PANEL_YBP_GRAPH_CO, et, c3, cnt, VAL_DOUBLE, VAL_DOUBLE, VAL_THIN_LINE, VAL_EMPTY_SQUARE, VAL_SOLID, 1, VAL_RED);
PlotXY (ybppanelHandle, PANEL_YBP_GRAPH_H2S, et, c4, cnt, VAL_DOUBLE, VAL_DOUBLE, VAL_THIN_LINE, VAL_EMPTY_SQUARE, VAL_SOLID, 1, VAL_RED);
PlotXY (ybppanelHandle, PANEL_YBP_GRAPH_CH4, et, c5, cnt, VAL_DOUBLE, VAL_DOUBLE, VAL_THIN_LINE, VAL_EMPTY_SQUARE, VAL_SOLID, 1, VAL_RED);
// Free dynamic memory
if (c1) free (c1);
if (c2) free (c2);
if (c3) free (c3);
if (c4) free (c4);
if (c5) free (c5);
if (et) free (et);
break;
}
return 0;
}
This is the .uir panel:
Besides,our customers want to use scroll bar to see the datas of the past.I need to solve these two problems. I used to download CVI8.5,CVI9.0,CVI2010 and set it up,but high version CVI would cover low version.At last,I had to reinstall system. I think I should download CVI2010 and find a crak.
