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add set position function for lcd

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This commit is contained in:
Eggert Jung
2021-05-21 02:45:25 +02:00
parent 1fc729f8ce
commit 5866c1f6f0
2 changed files with 48 additions and 30 deletions
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18
lcd.c
View File

@@ -44,6 +44,22 @@ void lcd_nibble_out(unsigned char c, unsigned char cd) {
lcd_out(out | rs ); 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 // clear LCD
void lcd_clear() { void lcd_clear() {
@@ -184,4 +200,4 @@ void lcd_write_P (const char *Buffer,...)
} }
} }
va_end(ap); va_end(ap);
} }

60
lcd.h
View File

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