8051驱动 LCD1602 例子程序

配套电路图

image.png

C程序代码

#include <8051.h>
#define true  1
#define false 0
#define HIGH  1
#define LOW   0

/**
 * LCD1602 的测试例子
 *
 * @author 鸿则
 * @Date 2018-02-11
 */

// LCD1602 define
#define LCD1602_E  P2_6
#define LCD1602_RS P2_4
#define LCD1602_RW P2_5

// length is 16
unsigned char line1[] = "  hello world!  ";
unsigned char line2[] = "~!@#$%^&*()_+[]?";

void delay(unsigned int multiple)
{
  unsigned int i;
  for(; multiple>0; multiple--)
    for(i=100; i>0; i--);
}

void writeCommand(unsigned char command)
{
  LCD1602_E  = LOW;
  LCD1602_RS = LOW;
  LCD1602_RW = LOW;
  P0 = command;
  delay(10);
  LCD1602_E = HIGH;
  delay(20);
  LCD1602_E = LOW;
}

void writeData(unsigned char data)
{
  LCD1602_E  = LOW;
  LCD1602_RS = HIGH;
  LCD1602_RW = LOW;
  P0 = data;
  delay(10);
  LCD1602_E = HIGH;
  delay(20);
  LCD1602_E = LOW;
}

void initLCD1602()
{
  delay(300);
  writeCommand(0x38);
  delay(100);
  writeCommand(0x38);
  delay(100);
  writeCommand(0x38);
  writeCommand(0x38);
  writeCommand(0x08);
  writeCommand(0x01);
  writeCommand(0x06);
  writeCommand(0x0C);
}

void setup()
{
  unsigned char i;
  initLCD1602();
  for(i=0; i<16; i++)
  {
    writeCommand(0x80 + i);
    writeData(line1[i]);
    delay(10);
  }
  for(i=0; i<16; i++)
  {
    writeCommand(0x80 + 0x40 + i);
    writeData(line2[i]);
    delay(10);
  }
}

void loop()
{
  
}

void main()
{
  setup();
  while(true) loop();
}