From 4b3ada594b2bd923d0a3b621197ebf199bb4b25a Mon Sep 17 00:00:00 2001
From: Silver Kits <silver.kits@eesti.ee>
Date: Tue, 4 Oct 2016 22:03:41 +0300
Subject: [PATCH] Add function to clear screen only starting from given
 position to given length

---
 lib/hd44780_111/hd44780.c | 14 ++++++++++++++
 lib/hd44780_111/hd44780.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/lib/hd44780_111/hd44780.c b/lib/hd44780_111/hd44780.c
index d00deae..0e1dda7 100755
--- a/lib/hd44780_111/hd44780.c
+++ b/lib/hd44780_111/hd44780.c
@@ -722,3 +722,17 @@ void lcd_use_display(int ADisplay)
   }
 #endif
 
+
+/*************************************************************************
+Clear characters at position until length
+Input:    start position and lentgh
+Returns:  none
+*************************************************************************/
+void lcd_clr(uint8_t pos, uint8_t len)
+  {
+    for (int i = 0; i < len; i++) {
+        lcd_goto(pos + i);
+        lcd_putc(' ');
+    }
+  }
+
diff --git a/lib/hd44780_111/hd44780.h b/lib/hd44780_111/hd44780.h
index 19b47de..f486b43 100755
--- a/lib/hd44780_111/hd44780.h
+++ b/lib/hd44780_111/hd44780.h
@@ -49,6 +49,7 @@ void lcd_init();
 void lcd_command(uint8_t cmd);
 
 void lcd_clrscr();
+void lcd_clr(uint8_t pos, uint8_t len);
 void lcd_home();
 void lcd_goto(uint8_t pos);