[资料分享] [共享]发一个LCD1602驱动程序（四位数据线）

songbo 2008-7-1 09:14 楼主

经过多次优化，得到比较精简的程序。
可以用Proteus仿真，硬件上也可用
编译器：ICC-AVR v6.31A
目标芯片 : M16
时钟: 8.0000Mhz

下面是AVR与LCD连接信息
PA2 ->RS
PA3 ->EN
地 ->RW
PA4 ->D4
PA5 ->D5
PA6 ->D6
PA7 ->D7

armok0190428.rar (2008-7-1 09:14 上传)

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沙发 songbo

[共享]发一个LCD1602驱动程序（四位数据线）

//编译器：ICC-AVR v6.31A 日期: 2005-11-24 20:29:57
//目标芯片 : M16
//时钟: 8.0000Mhz
/*-------------------------------------------------------------
LCD引脚定义
1---GND
2---VCC
3---VO
4---RS
5---RW
6---EN
7到14--D0-D7
15--背景灯+
16--背景灯-
-----------------------------------------------------------------*/
#include
#include

/*---------------------------------------------------------------
下面是AVR与LCD连接信息
PA2 ->RS
PA3 ->EN
地  ->RW
PA4 ->D4
PA5 ->D5
PA6 ->D6
PA7 ->D7
要使用本驱动，改变下面配置信息即可
-----------------------------------------------------------------*/
#define LCD_EN_PORT PORTA //以下2个要设为同一个口
#define LCD_EN_DDR    DDRA
#define LCD_RS_PORT PORTA //以下2个要设为同一个口
#define LCD_RS_DDR    DDRA
#define LCD_DATA_PORT  PORTA //以下3个要设为同一个口
#define LCD_DATA_DDR DDRA //一定要用高4位
#define LCD_DATA_PIN PINA
#define LCD_RS       (1< #define LCD_EN       (1< #define LCD_DATA    ((1< /*------------------------------------------------------------------------------
函数说明
------------------------------------------------------------------------------*/
void LCD_init(void);
void LCD_en_write(void);
void LCD_write_command(unsigned  char command) ;
void LCD_write_data(unsigned char data);
void LCD_set_xy (unsigned char x, unsigned char y);
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s);
void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data);
void delay_nus(unsigned int n);
void delay_nms(unsigned int n);
==============================================================================

#include "LCD.h"

void LCD_init(void)       //液晶初始化
{
  LCD_DATA_DDR|=LCD_DATA; //数据口方向为输出
  LCD_EN_DDR|=LCD_EN;    //设置EN方向为输出
  LCD_RS_DDR|=LCD_RS;    //设置RS方向为输出
  LCD_write_command(0x28);
  LCD_en_write();
  delay_nus(40);
  LCD_write_command(0x28);  //4位显示
  LCD_write_command(0x0c);  //显示开
  LCD_write_command(0x01);  //清屏
  delay_nms(2);
}

void LCD_en_write(void)  //液晶使能
{
  LCD_EN_PORT|=LCD_EN;
  delay_nus(1);
  LCD_EN_PORT&=~LCD_EN;
}

void LCD_write_command(unsigned char command) //写指令
{
  delay_nus(16);
  LCD_RS_PORT&=~LCD_RS;       //RS=0
  LCD_DATA_PORT&=0X0f;       //清高四位
  LCD_DATA_PORT|=command&0xf0; //写高四位
  LCD_en_write();
  command=command<<4;       //低四位移到高四位
  LCD_DATA_PORT&=0x0f;       //清高四位
  LCD_DATA_PORT|=command&0xf0; //写低四位
  LCD_en_write();

}

void LCD_write_data(unsigned char data) //写数据
{
  delay_nus(16);
  LCD_RS_PORT|=LCD_RS;    //RS=1
  LCD_DATA_PORT&=0X0f;    //清高四位
  LCD_DATA_PORT|=data&0xf0;  //写高四位
  LCD_en_write();
  data=data<<4;             //低四位移到高四位
  LCD_DATA_PORT&=0X0f;       //清高四位
  LCD_DATA_PORT|=data&0xf0; //写低四位
  LCD_en_write();
}

点赞 2008-7-1 09:14

板凳 songbo

回复沙发的帖子

void LCD_set_xy( unsigned char x, unsigned char y )  //写地址函数
{
unsigned char address;
if (y == 0) address = 0x80 + x;
else address = 0xc0 + x;
LCD_write_command( address);
}

void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s) //列x=0~15,行y=0,1
{
LCD_set_xy( X, Y ); //写地址
while (*s)  // 写显示字符
{
   LCD_write_data( *s );
   s ++;
}

}

void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data) //列x=0~15,行y=0,1
{
  LCD_set_xy( X, Y ); //写地址
  LCD_write_data( data);

}
=======================================================================

void delay_1us(void)                //1us延时函数
  {
asm("nop");
  }

void delay_nus(unsigned int n)    //N us延时函数
  {
unsigned int i=0;
for (i=0;i delay_1us();
  }

void delay_1ms(void)                //1ms延时函数
  {
unsigned int i;
for (i=0;i<1140;i++);
  }

void delay_nms(unsigned int n)    //N ms延时函数
  {
unsigned int i=0;
for (i=0;i delay_1ms();
  }

=========================================================================
#include "LCD.h"

void init_devices(void)
{
  CLI(); //disable all interrupts
  LCD_init();
  MCUCR = 0x00;
  GICR  = 0x00;
  TIMSK = 0x00; //timer interrupt sources
  SEI(); //re-enable interrupts
}

void main(void)
{
init_devices();
LCD_write_string(1,0,"Hi!!");
for(;;)
{
LCD_write_string(0,1,"archeng504");
LCD_write_char(6,0,'8');
}

}

点赞 2008-7-1 09:15

4楼 songbo

回复板凳的帖子

来一个自定义图案的程序。
1602中还可以自定义8个字符图案
图案规格5*8
下面是一个向上的箭头↑
0 0 0| 0 0 1 0 0 // 0x04
   |
0 0 0| 0 1 1 1 0 // 0x0e
   |
0 0 0| 1 0 1 0 1 // 0x15
   |
0 0 0| 0 0 1 0 0 // 0x04
   |
0 0 0| 0 0 1 0 0 // 0x04
   |
0 0 0| 0 0 1 0 0 //0x04
   |
0 0 0| 0 0 1 0 0 // 0x04
   |
0 0 0| 0 0 0 0 0 // 0x00

unsigned char data[8]={0x04,0x0e,0x15,0x04,0x04,0x04,0x04,0x00};//↑
unsigned char data1[8]={0x04,0x04,0x04,0x04,0x15,0x0e,0x04,0x00};//↓

void my_signs(unsigned char ascii,unsigned char *z)//0x00
{
  unsigned char address=0,i,temp=0;    //ascii为与要定义的图案对应的ascii码值（0x00到
  temp=(ascii&0x07)<<3;             //0x007间任选）
for(i=0;i<8;i++)
{
   address = 0x40 +temp+ i;
   LCD_write_command( address );
   delay_nus(1);
   LCD_write_data ( *(z++));
   delay_nus(1);
}
}

//建立图案
void LCD_init(void)    //液晶初始化
{
LCD_DATA_DDR|=LCD_DATA; // 数据为输出
LCD_EN_DDR|=LCD_EN; //设置RS.EN方向
LCD_RS_DDR|=LCD_RS;
LCD_write_command(0x28);  //4位显示
LCD_en_write();
delay_nms(15);
LCD_write_command(0x28);  //4位显示
LCD_write_command(0x0c);  //显示开
my_signs(0x00,data);//↑  //建立图案
my_signs(0x01,data1);//↓
LCD_write_command(0x01);  //清屏
}

显示自定义图案
LCD_write_char(9,0,0x00);//↑
LCD_write_char(9,0,0x01);//↓

点赞 2008-7-1 09:15