lcd.c

TG12864A引脚资料

#include "config.h"
#include <avr/io.h>
#include <util/delay.h>
#include <stdint.h>
#include <stdlib.h>
#include <avr/pgmspace.h>

#define LCD_BUSY_STAT (1<<7)
#define LCD_ONOFF_STAT (1<<5)

/*unsigned char lcd_read_stat(void)
{
    unsigned char ret;
    clr_LCD_E;
    set_LCD_RW;
    clr_LCD_DI;
    set_LCD_E;
    _delay_us(1);
    ret = LCD_DATA;
    clr_LCD_E;
    _delay_us(1);
    return ret;
}
*/
void lcd_read_stat(void)
{
	LCD_DATA_DDR = 0x00;
	clr_LCD_E;
	set_LCD_RW;
	clr_LCD_DI;
	set_LCD_E;
	_delay_us(0.5);
	while(LCD_DATA_PIN&0X80);
	clr_LCD_E;
	LCD_DATA_DDR = 0Xff;
}
void lcd_write_cmd(unsigned char cmd)
{
	lcd_read_stat();
    clr_LCD_E;
    clr_LCD_RW;
    clr_LCD_DI;
    LCD_DATA = cmd;
    set_LCD_E;
    _delay_us(0.5);
    clr_LCD_E;
    _delay_us(0.5);
}

void lcd_write_data(unsigned char x, unsigned char y, 
                                unsigned char *buf, unsigned char lenth)
{
    lcd_write_cmd(0xb8+(x%8));
    lcd_write_cmd(0x40+(y%64));
    while (lenth--)
    {
		lcd_read_stat();
        clr_LCD_RW;
        set_LCD_DI;
        LCD_DATA =*buf++;
        set_LCD_E;
        _delay_us(0.5);
        clr_LCD_E;
        _delay_us(0.5);
   }
}
uint8_t *read_rom(const prog_uchar *__data, uint16_t __size)
{
    uint8_t  *__p, *__tmp;
    
    __p = (uint8_t *) malloc(__size);
    __tmp = __p;
    while (__size--)
        *__tmp++ = pgm_read_byte(__data++);

    return __p;
}

void write(uint8_t __x, uint8_t __y, 
                const prog_uchar *__data, uint16_t __size)
{
    uint8_t *__p = read_rom(__data, __size);
    lcd_write_data(__x, __y, __p, __size);
    free(__p);
}