From 653b809a0ff852c5f5184fd46a5364dd16ac2133 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Sun, 22 Jan 2012 10:53:16 +0100
Subject: Added Pin::set_pull().

---
 hal/pin.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/hal/pin.h b/hal/pin.h
index 4102e6a..e2b0a62 100644
--- a/hal/pin.h
+++ b/hal/pin.h
@@ -23,6 +23,12 @@ class Pin {
 			OpenDrain,
 		};
 		
+		enum Pull {
+			PullNone,
+			PullUp,
+			PullDown,
+		};
+		
 		void set_mode(Mode m) {
 			g.MODER = (g.MODER & ~(3 << (n * 2))) | m << (n * 2);
 		}
@@ -35,6 +41,10 @@ class Pin {
 			}
 		}
 		
+		void set_pull(Pull p) {
+			g.PUPDR = (g.PUPDR & ~(3 << (n * 2))) | p << (n * 2);
+		}
+		
 		void set_af(int af) {
 			if(n < 8) {
 				g.AFRL = (g.AFRL & ~(0xf << (n * 4))) | af << (n * 4);
-- 
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