<![CDATA[
#!/bin/ch
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/time.h>
#include <cgi.h>
#include <chplot.h>
#include "DIO96.h"
#include "control.h"
#define DATABUF 2
int main()
{
unsigned char
buf[DATABUF],
data_ready;
struct
timeval tv;
fd_set
rfds;
int
retval,
fd0,
fd1,
ctl,
sem,
n,
i,
NumPoints,
ViewSignal;
struct msg_struct
msg;
class CRequest
Request;
class CResponse
Response;
chchar
*DataPoints,
*SigNumber;
class CPlot plot;
/* GET THE REQUESTED NUMBER OF DATA POINTS */
DataPoints = Request.getForm("DataPoints");
NumPoints = strtod(DataPoints, NULL);
SigNumber = Request.getForm("SigNumber");
ViewSignal = strtod(SigNumber, NULL);
if(ViewSignal < 0 || ViewSignal > 15)
{
fprintf(stderr, "Incorrect Signal chosen\n");
exit(-1);
}
/* OPEN THE FIFOS */
if ((fd0 = open("/dev/rtf0", O_RDONLY)) == NULL)
{
fprintf(stderr, "Error opening /dev/rtf0\n");
exit(-1);
}
if ((fd1 = open("/dev/rtf1", O_RDONLY)) == NULL)
{
fprintf(stderr, "Error opening /dev/rtf1\n");
close(fd0);
exit(-1);
}
if ((ctl = open("/dev/rtf2", O_WRONLY)) == NULL)
{
fprintf(stderr, "Error opening /dev/rtf2\n");
close(fd0);
close(fd1);
exit(-1);
}
if ((sem = open("/dev/rtf4", O_RDONLY)) == NULL)
{
fprintf(stderr, "Error opening /dev/rtf4\n");
close(fd0);
close(fd1);
close(ctl);
exit(-1);
}
/* SETUP THE START MESSAGE */
msg.command = START_TASK;
msg.period = TICK_RESOLUTION; /* 1ns per tick */
msg.conf = DIO96_CONF;
msg.buffer_size = DATABUF;
msg.dataPts = NumPoints;
/* SEND THE MESSAGE */
if (write(ctl, &msg, sizeof(msg)) < 0)
{
fprintf(stderr, "Can't send a command to RT-task\n");
close(fd0);
close(fd1);
close(ctl);
close(sem);
exit(-1);
}
/* CREATE BUFFER TO STORE THE DATA */
unsigned char
Signal[NumPoints];
int
x[NumPoints];
for(i=0; i<NumPoints; i++)
{
Signal[i]=0;
x[i]=0;
}
/* ACQUIRE THE DATA */
for(i=0; i<NumPoints; i++)
{
FD_ZERO(&rfds);
FD_SET(sem, &rfds);
tv.tv_sec = 2;
tv.tv_usec = 0;
retval = select(sem+1, &rfds, NULL, NULL, &tv);
if (retval > 0)
{
n = read(sem, &data_ready, 1);
if(data_ready==0x00)
read(fd0, buf, DATABUF);
if(data_ready==0x01)
read(fd1, buf, DATABUF);
// printf("%8b %8b\n", buf[0], buf[1]);
//printf("%04d %04d\n", buf[0], buf[1]);
if(ViewSignal > 7)
Signal[i] = (buf[1] & 1<<(ViewSignal-8)) >> (ViewSignal-8);
else
Signal[i] = (buf[0] & 1<<ViewSignal) >> ViewSignal;
// printf("%d\n", Signal[i]);
x[i] = i;
}
}
string_t filename = stradd(tmpnam(NULL), ".png");
/* PLOT INFO TO TEMPORARY FILE */
plot.data2D(x, Signal);
plot.plotType(PLOT_PLOTTYPE_STEPS, 0, 1, 1);
plot.outputType(PLOT_OUTPUTTYPE_FILE, "png color",
stradd("../../htdocs", filename));
plot.title("Signal Output");
plot.label(PLOT_AXIS_Y, "Signal");
plot.label(PLOT_AXIS_X, "Data Point");
plot.axisRange(PLOT_AXIS_Y, -0.1, 1.1);
plot.plotting();
/* START HTML RESPONSE */
Response.begin();
Response.title("Web-based Real-Time Data Acquisition");
printf(
"<HTML>\n"
" <HEAD>\n"
" <TITLE>Web-based Real-Time Data Acquisition</TITLE>\n"
" </HEAD>\n"
" <BODY BGCOLOR=\"#FFFFFF\" TEXT=\"#000000\" VLINK=\"#FF0000\">\n"
" <P ALIGN=\"CENTER\">\n"
" <IMG SRC=\"%s\">\n"
" <BR><BR>\n"
" <A HREF=\"../../realtime/form.html\">RESTART</A>\n"
" </BODY>\n"
"</HTML>\n", filename);
Response.end();
/* CLOSE THE OPENED FIFOS */
close(fd0);
close(fd1);
close(ctl);
close(sem);
/* REMOVE PLOT */
// rm -rf $(stradd("../../htdocs", filename))
return 0;
}
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