From fd6a511934ca2799a5887243e777a13bc9873f58 Mon Sep 17 00:00:00 2001
From: Anton Tetov <anton@tetov.se>
Date: Thu, 3 Mar 2022 14:16:22 +0100
Subject: [PATCH] upload of basic example
---
c_example/Makefile | 14 ++++++
c_example/test_jr3_comedi.c | 85 +++++++++++++++++++++++++++++++++++++
2 files changed, 99 insertions(+)
create mode 100755 c_example/Makefile
create mode 100755 c_example/test_jr3_comedi.c
diff --git a/c_example/Makefile b/c_example/Makefile
new file mode 100755
index 0000000..d899451
--- /dev/null
+++ b/c_example/Makefile
@@ -0,0 +1,14 @@
+LIBS=-lcomedi -lm
+BINS=test_jr3_comedi.c
+
+all: $(BINS)
+
+clean:
+ \rm -rf *.o $(BINS)
+
+%: %.c
+ $(CC) -o $@ $(CFLAGS) $^ $(LIBS)
+
+%.o: %.c
+ $(CC) -c -o $@ $(CFLAGS) $<
+
diff --git a/c_example/test_jr3_comedi.c b/c_example/test_jr3_comedi.c
new file mode 100755
index 0000000..5174ee0
--- /dev/null
+++ b/c_example/test_jr3_comedi.c
@@ -0,0 +1,85 @@
+// ./test_JR3_comedi /dev/comedi1 0
+// see /etc/comedi.conf for device, subdevices and channel
+// Example
+// configure /dev/comedi1 jr3_pci
+// ain 100 /dev/comedi1 0:0
+// (port 0:1-6 filter 0 fx..mz(order OK?))
+// port 0:7-12 filter 1 fx..mz(??)
+// Available: port 0 & 1, but not yet 3 & 4 of receiver card
+//
+
+
+#define CF_JR3 "/dev/comedi1"
+#define JR3_PORT 0
+#define NBR_CHAN 6
+#define _POSIX_C_SOURCE 199309
+#include <time.h>
+#include <comedilib.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+typedef struct {
+ float a[NBR_CHAN];
+} jr3_data_t;
+
+typedef struct {
+ double min;
+ double max;
+ double delta;
+ double maxdata;
+} info_t;
+
+int main(int argc, char *argv[])
+{
+ comedi_t *cf_jr3;
+ int subdev;
+ if (argc>1){
+ cf_jr3 = comedi_open(argv[1]);
+ subdev = atoi(argv[2]);
+ }
+ else{
+ cf_jr3 = comedi_open(CF_JR3);
+ subdev = JR3_PORT;
+ }
+ if (cf_jr3) {
+ int n, chan;
+ comedi_range *range;
+ lsampl_t maxdata;
+ info_t info[NBR_CHAN];
+ jr3_data_t jr3data; // [fx,fy,fz,mx,my,mx] ????
+
+ for (chan = 0 ; chan < NBR_CHAN ; chan++) {
+ range = comedi_get_range(cf_jr3, subdev, chan, 0);
+ maxdata = comedi_get_maxdata(cf_jr3, subdev, chan);
+ info[chan].min = range->min;
+ info[chan].max = range->max;
+ info[chan].maxdata = maxdata;
+ info[chan].delta = (range->max - range->min) / maxdata;
+ printf("channel maxdata min max delta %d %d %f %f %f \n", chan, maxdata, range->min, range->max, info[chan].delta);
+ }
+ while (1) {
+ struct timespec delay;
+ lsampl_t data;
+
+ delay.tv_sec = 0;
+ delay.tv_nsec = 500000000;
+ for (chan = 0 ; chan < NBR_CHAN ; chan++) {
+ int err = comedi_data_read(cf_jr3, subdev, chan, 0, 0, &data);
+ if (err < 0) {
+ printf("comedi_data_read error: err=%d subdev=%d %d %d\n",
+ err, subdev, chan, data);
+ } else {
+ jr3data.a[chan] = info[chan].min + (double)data * info[chan].delta;
+ }
+ }
+ for (chan = 0 ; chan < NBR_CHAN ; chan++) {
+ printf(" %f ", 1000.0*jr3data.a[chan]);
+ }
+ printf("\n");
+ nanosleep(&delay, 0);
+ }
+ }
+ else{
+ printf("Failed to open device!\n");
+ }
+}
--
GitLab