From 6c83886a51d32260ad49695aebd4ab7c6407c440 Mon Sep 17 00:00:00 2001
From: Henry Bruce <henry.bruce@intel.com>
Date: Tue, 1 Mar 2016 13:40:14 -0800
Subject: [PATCH] examples: gpio-tool.js now catches exception if invalid pin
 is specified

Signed-off-by: Henry Bruce <henry.bruce@intel.com>
---
 examples/javascript/gpio-tool.js | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/examples/javascript/gpio-tool.js b/examples/javascript/gpio-tool.js
index c900252..c5fb792 100644
--- a/examples/javascript/gpio-tool.js
+++ b/examples/javascript/gpio-tool.js
@@ -62,13 +62,17 @@ function onPinLevelChange() {
 
 function monitorPin() {
     var pinNumber = arguments[0];
-    var pin = new mraa.Gpio(pinNumber);
-    pin.dir(mraa.DIR_IN);
-    pin.isr(mraa.EDGE_BOTH, onPinLevelChange);
-    rl.question('Press ENTER to stop', function(answer) {
-        rl.close();
-        pin.isrExit();
-    });
+    try {
+        var pin = new mraa.Gpio(pinNumber);
+        pin.dir(mraa.DIR_IN);
+        pin.isr(mraa.EDGE_BOTH, onPinLevelChange);
+        rl.question('Press ENTER to stop', function(answer) {
+            rl.close();
+            pin.isrExit();
+        });
+    } catch (err) {
+     console.log(err.message);
+    }
 }
 
 const args = process.argv;