added apply_cal demo

demo/Makefile

@@ -8,7 +8,8 @@ LIBS += ../lib/libcomedi.a -lm
 
 BINS=tut1 tut2 # sv
 MBINS=inp inpn eeprom_dump info outp insn antialias ao_waveform \
-	dio mmap ledclock receiver sigio select sender cmd poll
+	dio mmap ledclock receiver sigio select sender cmd poll \
+	apply_cal
 
 all: $(BINS) $(MBINS)
 

demo/apply_cal.c

@@ -0,0 +1,55 @@
+/*
+ * demo for changing between different calibrations
+ * Part of Comedilib
+ *
+ * Copyright (c) 1999,2000 David A. Schleef <ds@schleef.org>
+ *
+ * This file may be freely modified, distributed, and combined with
+ * other software, as long as proper attribution is given in the
+ * source code.
+ */
+/*
+ * A little output demo
+ */
+
+#include <stdio.h>
+#include <comedilib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <getopt.h>
+#include <ctype.h>
+#include "examples.h"
+
+comedi_t *device;
+
+
+int main(int argc, char *argv[])
+{
+	lsampl_t data;
+	int ret;
+
+	parse_options(argc,argv);
+
+	device=comedi_open(filename);
+	if(!device){
+		comedi_perror(filename);
+		exit(0);
+	}
+
+	data = value; 
+	if(verbose){
+		printf("writing %d to device=%s subdevice=%d channel=%d range=%d analog reference=%d\n",
+			data,filename,subdevice,channel,range,aref);
+	}
+
+	ret=comedi_apply_calibration(device,subdevice,channel,range,aref,NULL);
+	if(ret<0){
+		comedi_perror(filename);
+		exit(0);
+	}
+
+	return 0;
+}
+