add set position function for lcd

lcd.c

@@ -44,6 +44,22 @@ void lcd_nibble_out(unsigned char c, unsigned char cd) {
 	lcd_out(out | rs );
 }
 
+void lcd_set_position(uint8_t row, uint8_t col){
+    if(col >= LCD_WIDTH)
+        return;
+
+    if(row==0)
+        lcd_nibble_out(0x80|col, 0);
+    if(row==1)
+        lcd_nibble_out(0xC0|col, 0);
+    if(row==2)
+        lcd_nibble_out(0x80|(col+LCD_WIDTH), 0);
+    if(row==3)
+        lcd_nibble_out(0xC0|(col+LCD_WIDTH), 0);
+
+    char_counter = (row * LCD_WIDTH) + col;
+}
+
 //***************************************************************************************
 // clear LCD
 void lcd_clear() {
@@ -184,4 +200,4 @@ void lcd_write_P (const char *Buffer,...)
 		}
 	}
 	va_end(ap);
-}
+}

lcd.h

@@ -6,41 +6,43 @@
  */ 
 
 #ifndef __LCD_H__
-	#define __LCD_H__
-
-	#include <inttypes.h>
-	#include <avr/io.h>
-	#include <avr/pgmspace.h>
-	#include <stdlib.h>
-	#include <stdarg.h>
-	#include <ctype.h>
-	#include <string.h>
-	#include <util/delay.h>
-	#include "i2c.h"
-
-	#define LCD_I2C_ADDR	0x4E
-
-	//Port Belegung am PCF8574 (1<<PORT)
-	#define LCD_RS			(1<<0)
-	#define LCD_RW			(1<<1)
-	#define LCD_E			(1<<2)
-	#define LCD_BACKLIGHT	(1<<3)
-
-	#define LCD_D4			(1<<4)
-	#define LCD_D5			(1<<5)
-	#define LCD_D6			(1<<6)
-	#define LCD_D7			(1<<7)
-
-	#define LCD_WIDTH 16
-	#define LCD_ADDR_LINE1	(0x80)
-	#define LCD_ADDR_LINE2	(0xC0)
-
-	void lcd_init(void);
-	void lcd_clear(void);
-	void lcd_home(void);
-	void lcd_print_str (char *str);
-	void lcd_write_P (const char *Buffer,...);
-
-	#define lcd_write(format, args...)   lcd_write_P(PSTR(format) , ## args)
+#define __LCD_H__
+
+#include <inttypes.h>
+#include <avr/io.h>
+#include <avr/pgmspace.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <string.h>
+#include <util/delay.h>
+#include "i2c.h"
+
+#define LCD_I2C_ADDR	0x4E
+
+//Port Belegung am PCF8574 (1<<PORT)
+#define LCD_RS			(1<<0)
+#define LCD_RW			(1<<1)
+#define LCD_E			(1<<2)
+#define LCD_BACKLIGHT	(1<<3)
+
+#define LCD_D4			(1<<4)
+#define LCD_D5			(1<<5)
+#define LCD_D6			(1<<6)
+#define LCD_D7			(1<<7)
+
+#define LCD_WIDTH 20
+#define LCD_ADDR_LINE1	(0x80)
+#define LCD_ADDR_LINE2	(0xC0)
+
+void lcd_init(void);
+void lcd_clear(void);
+void lcd_home(void);
+void lcd_print_str (char *str);
+void lcd_write_P (const char *Buffer,...);
+
+void lcd_set_position(uint8_t row, uint8_t col);
+
+#define lcd_write(format, args...)   lcd_write_P(PSTR(format) , ## args)
 
 #endif