From: batt <batt@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Thu, 3 Jun 2010 15:58:51 +0000 (+0000)
Subject: Better HD44780 lcd display initialization.
X-Git-Tag: 2.5.0~24
X-Git-Url: https://codewiz.org/gitweb?a=commitdiff_plain;h=13535b4d8636ee22a2dd737e0fa4433d5f785a8b;p=bertos.git

Better HD44780 lcd display initialization.

If the display is already in 4bit mode, reset to 8 bit
mode first, otherwise commands are misunderstood.


git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3893 38d2e660-2303-0410-9eaa-f027e97ec537
---

diff --git a/bertos/drv/lcd_hd44.c b/bertos/drv/lcd_hd44.c
index 78df78d5..5bce8c6d 100644
--- a/bertos/drv/lcd_hd44.c
+++ b/bertos/drv/lcd_hd44.c
@@ -405,6 +405,7 @@ void lcd_hw_init(void)
 	timer_delay(50);
 
 #if CONFIG_LCD_4BIT
+	lcd_regWrite(LCD_CMD_SET8BIT);
 	lcd_mode4Bit();
 	timer_delay(2);
 #endif /* CONFIG_LCD_4BIT */
diff --git a/bertos/drv/lcd_hd44.h b/bertos/drv/lcd_hd44.h
index 0616d31c..b2ff8f0c 100644
--- a/bertos/drv/lcd_hd44.h
+++ b/bertos/drv/lcd_hd44.h
@@ -79,6 +79,7 @@
 	#define LCD_CMD_SETFUNC  0x38   /**< 8 bits, 2 lines, 5x7 dots */
 #endif
 
+#define LCD_CMD_SET8BIT          0x30
 #define LCD_CMD_DISPLAY_ON       0x0F   /**< Switch on display */
 #define LCD_CMD_DISPLAY_OFF      0x08   /**< Switch off display */
 #define LCD_CMD_CLEAR            0x01   /**< Clear display */