157 lines
2.6 KiB
C
157 lines
2.6 KiB
C
/*
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* main.c
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*
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* Created: 11-Feb-21 11:01:07 PM
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* Author: lemms
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*/
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#define F_CPU 10e6
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#include <xc.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#define LCD_E 6
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#define LCD_RS 4
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void _delay_ms(double __ms);
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void lcd_strobe_lcd_e(void);
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void sbi_portc(int index);
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void cbi_portc(int index);
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void sbi_porta(int index);
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void cbi_porta(int index);
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void init_4bits_mode(void);
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void lcd_write_string(const char *str);
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void lcd_write_character(unsigned char byte);
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void lcd_write_command(unsigned char byte);
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void lcd_clear();
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int main(void)
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{
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init_4bits_mode();
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_delay_ms(10);
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lcd_clear();
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lcd_write_string("Pintebaas");
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while(1)
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{
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//TODO:: Please write your application code
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}
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}
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void lcd_clear() {
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lcd_write_command (0x01); //Leeg display
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_delay_ms(2);
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lcd_write_command (0x80); //Cursor terug naar start
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}
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void lcd_strobe_lcd_e(void) {
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sbi_porta(LCD_E); // E high
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_delay_ms(1);
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cbi_porta(LCD_E); // E low
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_delay_ms(1);
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}
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void sbi_portc(int index){
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PORTC |= (1<<index);
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}
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void cbi_portc(int index){
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PORTC &= ~(1<<index);
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}
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void sbi_porta(int index){
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PORTA |= (1<<index);
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}
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void cbi_porta(int index){
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PORTA &= ~(1<<index);
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}
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void init_4bits_mode(void) {
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// PORTC output mode and all low (also E and RS pin)
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// Init I/O
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DDRC = 0xFF; // PORTD(7) output, PORTD(6:0) input
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PORTC = 0xFF;
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DDRD = 0xFF;
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DDRA = 0xFF;
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PORTC = 0x00;
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PORTA = 0x00;
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PORTC = 0x20; // function for 4-bit 1 row
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lcd_strobe_lcd_e();
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PORTC = 0x20; // function high nibble 4-bit 2 row
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lcd_strobe_lcd_e();
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PORTC = 0x80; // function low nibble 4-bit 2 row
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lcd_strobe_lcd_e();
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PORTC = 0x00; // function high nibble turn on visible blinking-block cursor
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lcd_strobe_lcd_e();
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PORTC = 0xF0; // function low nibble turn on visible blinking-block cursor
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lcd_strobe_lcd_e();
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PORTC = 0x00; // Entry mode set high nibble
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lcd_strobe_lcd_e();
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PORTC = 0x60; // Entry mode set low nibble
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lcd_strobe_lcd_e();
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// return home
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lcd_write_command(0x02);
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lcd_strobe_lcd_e();
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}
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void lcd_write_character(unsigned char byte){
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//upper nibble
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PORTC = byte;
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sbi_porta(LCD_RS);
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lcd_strobe_lcd_e();
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//lower nibble
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PORTC = (byte<<4);
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sbi_porta(LCD_RS);
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lcd_strobe_lcd_e();
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}
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void lcd_write_command(unsigned char byte){
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//upper nibble
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PORTC = byte;
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cbi_porta(LCD_RS);
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lcd_strobe_lcd_e();
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//lower nibble
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PORTC = (byte<<4);
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cbi_porta(LCD_RS);
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lcd_strobe_lcd_e();
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}
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void lcd_write_string(const char *str) {
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for(;*str; str++){
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lcd_write_character(*str);
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}
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}
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void lcd_move_right(void){
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lcd_write_command(0x1E);
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} |