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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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16
lcd.c
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@@ -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() {

4
lcd.h
View File

@@ -31,7 +31,7 @@
#define LCD_D6 (1<<6)
#define LCD_D7 (1<<7)
#define LCD_WIDTH 16
#define LCD_WIDTH 20
#define LCD_ADDR_LINE1 (0x80)
#define LCD_ADDR_LINE2 (0xC0)
@@ -41,6 +41,8 @@
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