lcd done

Microcontrollers/opdracht 2.5/main.c

@@ -12,23 +12,32 @@
 #include <util/delay.h>
 #include <avr/interrupt.h>
 
-#define LCD_E 	3
-#define LCD_RS	2
+#define LCD_E 	6
+#define LCD_RS	4
 
 void _delay_ms(double __ms);
 void lcd_strobe_lcd_e(void);
 void sbi_portc(int index);
 void cbi_portc(int index);
+void sbi_porta(int index);
+void cbi_porta(int index);
 void init_4bits_mode(void);
 void lcd_write_string(const char *str);
-void lcd_add_character(unsigned char byte);
-void lcd_add_command(unsigned char byte);
+void lcd_write_character(unsigned char byte);
+void lcd_write_command(unsigned char byte);
+void lcd_clear();
 
 int main(void)
 {
+	
 	init_4bits_mode();
 	
+		
+	_delay_ms(10);
 	
+	lcd_clear();
+		
+	lcd_write_string("Pintebaas");
 	
     while(1)
     {
@@ -37,26 +46,51 @@ int main(void)
     }
 }
 
+void lcd_clear() {
+	lcd_write_command (0x01);						//Leeg display
+	_delay_ms(2);
+	lcd_write_command (0x80);						//Cursor terug naar start
+}
+
 void lcd_strobe_lcd_e(void) {
-	sbi_portc(LCD_E);	// E high
+	
+	sbi_porta(LCD_E);	// E high
 	_delay_ms(1);
-	cbi_portc(LCD_E);  	// E low
+	cbi_porta(LCD_E);  	// E low
 	_delay_ms(1);
+	
 }
 
 void sbi_portc(int index){
 	PORTC |= (1<<index);
 }
 
+
 void cbi_portc(int index){
 	PORTC &= ~(1<<index);
 }
 
+void sbi_porta(int index){
+	PORTA |= (1<<index);
+}
+
+
+void cbi_porta(int index){
+	PORTA &= ~(1<<index);
+}
+
 void init_4bits_mode(void) {
 	
 	// PORTC output mode and all low (also E and RS pin)
-	DDRC = 0xFF;
+	
+	// Init I/O
+	DDRC = 0xFF;			// PORTD(7) output, PORTD(6:0) input
+	PORTC = 0xFF;
+	
+	DDRD = 0xFF;
+	DDRA = 0xFF;
 	PORTC = 0x00;
+	PORTA = 0x00;
 	
 	PORTC = 0x20;	// function for 4-bit 1 row
 	lcd_strobe_lcd_e();
@@ -76,43 +110,48 @@ void init_4bits_mode(void) {
 	PORTC = 0x60;	// Entry mode set low nibble
 	lcd_strobe_lcd_e();
 	
-	lcd_write_string("Pintebaas");
+	// return home
+	lcd_write_command(0x02);
+	lcd_strobe_lcd_e();
 }
 
-void lcd_add_character(unsigned char byte){
+void lcd_write_character(unsigned char byte){
+	
 	
 	//upper nibble
 	PORTC = byte;
-	sbi_portc(LCD_RS);
+	sbi_porta(LCD_RS);
 	lcd_strobe_lcd_e();
 	
 	//lower nibble
 	PORTC = (byte<<4);
-	sbi_portc(LCD_RS);
+	sbi_porta(LCD_RS);
 	lcd_strobe_lcd_e();
+	
 }
 
-void lcd_add_command(unsigned char byte){
+void lcd_write_command(unsigned char byte){
 	
 	//upper nibble
 	PORTC = byte;
-	cbi_portc(LCD_RS);
+	cbi_porta(LCD_RS);
 	lcd_strobe_lcd_e();
 	
 	//lower nibble
 	PORTC = (byte<<4);
-	cbi_portc(LCD_RS);
+	cbi_porta(LCD_RS);
 	lcd_strobe_lcd_e();
+
 }
 
 void lcd_write_string(const char *str) {
 	
 	for(;*str; str++){
-		lcd_add_character(*str);
+		lcd_write_character(*str);
 	}
 }
 
 void lcd_move_right(void){
 	
-	lcd_add_command(0x1E);
+	lcd_write_command(0x1E);
 }