From 4c7a19d3d7049bcc9fb3185ce2bc91333a7ca9e1 Mon Sep 17 00:00:00 2001
From: Soeren Apel <soeren@apelpie.net>
Date: Sat, 10 Jun 2017 00:57:48 +0200
Subject: [PATCH] DeviceManager: Don't perform scans with DMM drivers

---
 pv/devicemanager.cpp | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/pv/devicemanager.cpp b/pv/devicemanager.cpp
index 58f507c9..540f8815 100644
--- a/pv/devicemanager.cpp
+++ b/pv/devicemanager.cpp
@@ -68,7 +68,20 @@ DeviceManager::DeviceManager(shared_ptr<Context> context) :
 		progress->setLabelText(QObject::tr("Scanning for %1...")
 			.arg(QString::fromStdString(entry.first)));
 
-		driver_scan(entry.second, map<const ConfigKey *, VariantBase>());
+		/**
+		 * We currently only support devices that can deliver
+		 * samples at a fixed samplerate i.e. oscilloscopes and
+		 * logic analysers.
+		 * @todo Add support for non-monotonic devices i.e. DMMs
+		 * and sensors.
+		 */
+		const auto keys = (entry.second)->config_keys();
+
+		bool supported_device = keys.count(ConfigKey::LOGIC_ANALYZER) |
+			keys.count(ConfigKey::OSCILLOSCOPE);
+
+		if (supported_device)
+			driver_scan(entry.second, map<const ConfigKey *, VariantBase>());
 
 		progress->setValue(entry_num++);
 		QApplication::processEvents();
-- 
2.30.2