From 838f04505c7da75fd053c2bcb8bd1f1dacbd0ec9 Mon Sep 17 00:00:00 2001
From: Stefan `Sec` Zehl <sec@42.org>
Date: Wed, 27 Jul 2011 17:19:29 +0200
Subject: [PATCH] Add small lcd documentation :)

---
 firmware/lcd/display.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/firmware/lcd/display.c b/firmware/lcd/display.c
index fbb6150..02a9eae 100644
--- a/firmware/lcd/display.c
+++ b/firmware/lcd/display.c
@@ -79,9 +79,23 @@ void lcdInit(void) {
 
     lcd_select();
 
+/* Small Nokia 1200 LCD docs:
+ *           clear/ set
+ *  on       0xae / 0xaf
+ *  invert   0xa6 / 0xa7
+ *  mirror-x 0xA0 / 0xA1
+ *  mirror-y 0xc7 / 0xc8
+ *
+ *  0x20+x contrast (0=black - 0x2e)
+ *  0x40+x offset in rows from top (-0x7f)
+ *  0x80+x contrast? (0=black -0x9f?)
+ *  0xd0+x black lines from top? (-0xdf?)
+ *
+ */
+
     lcdWrite(TYPE_CMD,0xE2);
     delayms(5);
-    lcdWrite(TYPE_CMD,0xAF);
+    lcdWrite(TYPE_CMD,0xAF); // Display ON
     lcdWrite(TYPE_CMD,0xA4);
     lcdWrite(TYPE_CMD,0x2F);
     lcdWrite(TYPE_CMD,0xB0);
@@ -252,3 +266,4 @@ void lcdShift(int x, int y, bool wrap) {
     while(y-->0)
 			lcdShiftV(dir, wrap);
 }
+