From 642e75ad30b6577a9be3a60dc6804f5903168be7 Mon Sep 17 00:00:00 2001
From: Cruiser79 <der.tim@gmx.de>
Date: Tue, 21 Feb 2017 08:07:53 +0100
Subject: [PATCH] Update hd44780.go

Add method CreateChar.
---
 controller/hd44780/hd44780.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/controller/hd44780/hd44780.go b/controller/hd44780/hd44780.go
index 88032d5..e046240 100644
--- a/controller/hd44780/hd44780.go
+++ b/controller/hd44780/hd44780.go
@@ -646,3 +646,14 @@ func (conn *I2CConnection) Close() error {
 	glog.V(2).Info("hd44780: closing I2C bus")
 	return conn.I2C.Close()
 }
+
+// Allows us to fill the first 8 CGRAM locations
+// with custom characters, we can then print with writeChar(0-7)
+func (hd *HD44780) CreateChar(location byte, charmap []byte) error {
+	location &= 0x7;
+	err := hd.WriteInstruction(lcdSetCGRamAddr | (location << 3))
+	for i := 0; i < 8; i++ {
+		hd.WriteChar(charmap[i]);
+	}
+	return err
+}