y que librería para manejo de LCD usas?
Saludos
esta libreria:
#include "lcd.h"
#include "lpc21xx.h"
//#include "lpc210x.h"
#define lcd_line_two 0x40
void lcd_wait(){
int loop=5000; //more than enough
//busy loop
while(loop--);
}
void lcd_out_data4(unsigned char val){
IOCLR0 |= (LCD_DATA);
IOSET0 |= (val<<4);
}
void lcd_write_nibbles(unsigned char val){
//higher-order byte
lcd_en_set();
lcd_out_data4((val>>4)&0x0F);
lcd_en_clr();
lcd_wait();
//lower-order byte
lcd_en_set();
lcd_out_data4((val)&0x0F);
lcd_en_clr();
lcd_wait();
}
void lcd_write_control(unsigned char val){
lcd_rs_clr();
lcd_write_nibbles(val);
}
void lcd_init(){
PINSEL0 &= (~LCD_GPIO_SEL0);
PINSEL1 &= (~LCD_GPIO_SEL1);
/* we only work on OUTPUT so far */
IODIR0 |= LCD_IOALL;
/* IO init complete, init LCD */
/* init 4-bit ops*/
lcd_rs_clr();
lcd_rw_clr();
lcd_en_clr();
//wait VDD raise > 4.5V
lcd_wait();
//dummy inst
lcd_write_nibbles(0x30);
lcd_write_nibbles(0x30);
lcd_write_nibbles(0x30);
//FUNCTION SET
//001DL N F XX
//DL=1: 8bit
//DL=0: 4bit
//N=0: 1 line display
//N=1: 2 line display
//F=0: 5x7 dots
//F=1: 5x10 dots
//our case:
//0010 1000
lcd_en_set();
lcd_out_data4(0x2);
lcd_en_clr();
lcd_wait();
lcd_write_nibbles(0x28);
//LCD ON
lcd_write_nibbles(0x0E);
//Clear Display
lcd_write_nibbles(0x01);
//Entry mode
lcd_write_nibbles(0x06);
}
void lcd_putchar(unsigned char c){
lcd_rs_set();
switch (c) {
case '\f' : lcd_write_control(0x01); //borra la pantalla
// delay_ms(2);
break;
case '\n' : lcd_gotoxy(1,2); break; // Salta al comienzo de la segunda línea.
case '\b' : lcd_write_control(0x10); break; // Retrocede una posición.
default : lcd_write_nibbles(c); break;
}
}
void lcd_print(unsigned char *str)
{
int i;
//limit 1 line display for prints
for (i=0;i<32 && str
!=0;i++){
lcd_putchar(str);
}
}
void lcd_gotoxy( unsigned char x, unsigned char y) {
char address;
if(y!=1)
address=lcd_line_two;
else
address=0;
address+=x-1;
lcd_write_control(0x80|address);
}
