From 556f4384a39d5359dd398d9d8630db2f23683e6d Mon Sep 17 00:00:00 2001
From: Steffen Vogel <post@steffenvogel.de>
Date: Tue, 25 Sep 2018 12:09:04 +0200
Subject: [PATCH] uldaq: check that signal definitions are correct.

---
 etc/uldaq.conf    | 4 ++--
 lib/nodes/uldaq.c | 9 +++++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/etc/uldaq.conf b/etc/uldaq.conf
index b04d8ba76..436315139 100644
--- a/etc/uldaq.conf
+++ b/etc/uldaq.conf
@@ -4,11 +4,11 @@ nodes = {
 
         in = {
             signals = (
-                { name = "ch0", channel = 0, range = "bipolar-10" }
+                { name = "ch0", type = "float", channel = 0, range = "bipolar-10" }
             )
 
             sample_rate = 1000,
             vectorize = 100
         }
     }
-}
\ No newline at end of file
+}
diff --git a/lib/nodes/uldaq.c b/lib/nodes/uldaq.c
index 3612d1b68..afb831dc1 100644
--- a/lib/nodes/uldaq.c
+++ b/lib/nodes/uldaq.c
@@ -191,6 +191,15 @@ int uldaq_check(struct node *n)
 		return -1;
 	}
 
+	for (size_t i = 0; i < list_length(&n->signals); i++) {
+		struct signal *s = (struct signal *) list_at(&n->signals, i);
+
+		if (s->type != SIGNAL_TYPE_FLOAT) {
+			warn("Node '%s' only supports signals of type = float!", node_name(n));
+			return -1;
+		}
+	}
+
 	return 0;
 }