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標(biāo)題: 單片機(jī)LCD1602液晶屏驅(qū)動(dòng) [打印本頁]

作者: qzp740120 時(shí)間: 2020-4-29 17:12
標(biāo)題: 單片機(jī)LCD1602液晶屏驅(qū)動(dòng)
/*
LCD1602液晶屏驅(qū)動(dòng)模塊
1、可直接嵌入到項(xiàng)目中使用
2、晶振頻率：1M
3、如晶振提高低層驅(qū)動(dòng)延時(shí)要作相應(yīng)修改
AVR_AFA
程序編寫過程中參照了peak的4線顯示程序
peak：AVR論壇技術(shù)版版主
*/
/**********************************************/
/*  RS---PD3 RW---PD4 EN--PD6 DATA--PB*/
/*********************************************/
#include <iom16v.h>
#define RS_CLR PORTD &= ~(1 << PD3)
#define RS_SET PORTD |= (1 << PD3)
#define RW_CLR PORTD &= ~(1 << PD4)
#define RW_SET PORTD |= (1 << PD4)
#define EN_CLR PORTD &= ~(1 << PD6)
#define EN_SET PORTD |= (1 << PD6)
/*延時(shí)函數(shù)*/
void delay_us(unsigned int n) {
if (n == 0) {
  return ;
  }
while (--n);
}
/*延時(shí)函數(shù)*/
void delay_ms(unsigned char i) {
unsigned char a, b;
for (a = 1; a < i; a++) {
  for (b = 1; b; b++) {
;
}
  }
}
/*顯示屏命令寫入函數(shù)*/
void LCD_write_com(unsigned char com) {

RS_CLR;
RW_CLR;
EN_SET;
PORTB = com;
delay_us(5);
EN_CLR;
}
/*顯示屏數(shù)據(jù)寫入函數(shù)*/
void LCD_write_data(unsigned char data) {
RS_SET;
RW_CLR;
EN_SET;
PORTB = data;
delay_us(5);
EN_CLR;
}
/*顯示屏清空顯示*/
void LCD_clear(void) {
LCD_write_com(0x01);
delay_ms(5);
}
/*顯示屏字符串寫入函數(shù)*/
void LCD_write_str(unsigned char x,unsigned char y,unsigned char *s) {

if (y == 0) {
   LCD_write_com(0x80 + x);
   }
else {
   LCD_write_com(0xC0 + x);
   }

while (*s) {
   LCD_write_data( *s);
   s ++;
   }
}
/*顯示屏單字符寫入函數(shù)*/
void LCD_write_char(unsigned char x,unsigned char y,unsigned char data) {

if (y == 0) {
   LCD_write_com(0x80 + x);
   }
else {
   LCD_write_com(0xC0 + x);
   }

LCD_write_data( data);
}
/*顯示屏初始化函數(shù)*/
void LCD_init(void) {

DDRB = 0xFF;    /*I/O口方向設(shè)置*/
DDRD |= (1 << PD3) | (1 << PD4) | (1 << PD6);
LCD_write_com(0x38); /*顯示模式設(shè)置*/
delay_ms(5);
LCD_write_com(0x38);
delay_ms(5);
LCD_write_com(0x38);
delay_ms(5);
LCD_write_com(0x38);

LCD_write_com(0x08); /*顯示關(guān)閉*/
LCD_write_com(0x01); /*顯示清屏*/
LCD_write_com(0x06); /*顯示光標(biāo)移動(dòng)設(shè)置*/
delay_ms(5);
LCD_write_com(0x0C); /*顯示開及光標(biāo)設(shè)置*/
}

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