From: David Schleef <ds@schleef.org>
Date: Wed, 25 Sep 2002 01:11:47 +0000 (+0000)
Subject: add some error checking
X-Git-Tag: r0_7_21~305
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=5dae30af2fc097b5b18334c9de38d07354134a60;p=comedilib.git

add some error checking
---

diff --git a/demo/ao_waveform.c b/demo/ao_waveform.c
index b78db77..364d762 100644
--- a/demo/ao_waveform.c
+++ b/demo/ao_waveform.c
@@ -117,7 +117,7 @@ int main(int argc, char *argv[])
 	parse_options(argc,argv);
 
 	/* Force n_chan to be 1 */
-	n_chan = 2;
+	n_chan = 1;
 
 	if(value){
 		waveform_frequency = value;
@@ -163,6 +163,18 @@ int main(int argc, char *argv[])
 
 	dump_cmd(stdout,&cmd);
 
+	err = comedi_command_test(dev, &cmd);
+	if (err < 0) {
+		comedi_perror("comedi_command_test");
+		exit(1);
+	}
+
+	err = comedi_command_test(dev, &cmd);
+	if (err < 0) {
+		comedi_perror("comedi_command_test");
+		exit(1);
+	}
+
 	if ((err = comedi_command(dev, &cmd)) < 0) {
 		comedi_perror("comedi_command");
 		exit(1);