From 3e9ce063dbdf250f11a119f739105b5536b1abef Mon Sep 17 00:00:00 2001
From: SjB <steve@sagacity.ca>
Date: Fri, 11 Apr 2014 22:51:03 -0400
Subject: [PATCH] Force digitalpin direction to be embd.IN when Watching

Only Input pin can generate interrupt.
---
 host/generic/digitalpin.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/host/generic/digitalpin.go b/host/generic/digitalpin.go
index 955e30f..5ad1729 100644
--- a/host/generic/digitalpin.go
+++ b/host/generic/digitalpin.go
@@ -127,6 +127,10 @@ func (p *digitalPin) setEdge(edge embd.Edge) error {
 }
 
 func (p *digitalPin) Watch(edge embd.Edge, callback embd.IRQEvent) error {
+	if err := p.SetDirection(embd.In); err != nil {
+		return err
+	}
+
 	if err := p.setEdge(edge); err != nil {
 		return err
 	}