ATMega16驱动12864lcd-绘图-画点

tvn 2009-11-29 16:04 楼主

因为我在网上看了很久，12864绘图中的画点有些难度。因为可以液晶芯片不一样驱动会有差别。
所以把我写的贴出来大家分享，不明白的加我QQ：343700980一起交流！
我使用的环境是：
单片机：ATMega16
开发板：DDC-16B
液晶是：YJD12864C-1（可以参考《ST7920中文手册》）
硬件链接：
LCD MCU
RS    PA5
RW    PA6
EN    PA7
DB0-7  PD0-7

废话不说，源码：

回复评论（8）

2推荐 zxhnet

文件delay.h
/*
欢迎喜欢单片机的朋友一起交流
QQ:343700980
加时注明：“单片机”
*/
#ifndef __delay_h
#define __delay_h
void delay_1ms(void);
void delay_nus(unsigned char n);
void delay_nms(unsigned int n);
void s_ms(unsigned int ms);
/*******************************************************************
微秒级精确延时(ICC)
*******************************************************************/
void delay_nus(unsigned char tt)
{
asm("_L2: subi R16,1");
asm(" nop")
asm(" brne _L2");
asm(" nop");
asm(" ret");
}
/*************************************************************************
毫秒级精确延时(ICC)
*************************************************************************/
#define xtal 4 //以MHz为单位，不同的系统时钟要修改。
void delay_1ms(void)
{
unsigned int i;
for(i=0;i<(unsigned int)(xtal*143-2);i++);
}
void delay_nms(unsigned int num)
{
unsigned int i;
for(i=0;i
}
//自定义延时函数
void s_ms(unsigned int ms)
{
for(;ms>1;ms--);
}
#endif
文件lcd.h
/*
欢迎喜欢单片机的朋友一起交流
QQ:343700980
加时注明：“单片机”
*/
extern volatile unsigned char *LCD_DIR_PORT; //DDRD
extern volatile unsigned char *LCD_IP_PORT; //PIND
extern volatile unsigned char *LCD_OP_PORT; //PORTD
extern volatile unsigned char *LCD_DIR_CTL; //DDRA
extern volatile unsigned char *LCD_EN_PORT; //PORTA7
extern char LCD_EN_BIT; //BIT(7)
extern volatile unsigned char *LCD_RS_PORT; //PORTA5
extern char LCD_RS_BIT; //BIT(5)
extern volatile unsigned char *LCD_RW_PORT; //PORTA6
extern char LCD_RW_BIT; //BIT(6)
// *** LCD Function *** //
void Init_LCD(void);
void LCD_Display_Off(void);
void LCD_Display_On(void);
void LCD_Clear(void);
void LCD_Home(void);
void LCD_Cursor(char row, char column);
void LCD_Cursor_On(void);
void LCD_Cursor_Off(void);
void LCD_DisplayCharacter(char Char);
void LCD_DisplayString_F(char row, char column, const unsigned char *string);
void LCD_DisplayString(char row, char column, unsigned char *string);
主程序文件：
/*
欢迎喜欢单片机的朋友一起交流
QQ:343700980
加时注明：“单片机”
*/
#include
#include "LCD.h"
#include "delay.h"
#define uchar unsigned char
#define uint unsigned int
static void test(const char *s);
void main (void)
{
//DDRA=0x00;
unsigned char aa;
unsigned char bb;
unsigned char add_x=0x80; //GDRAM水平地址
unsigned char add_y=0x80; //GDRAM垂直地址
float temp = 0.0;
unsigned char x_low,x_hight; //定义列地址的高低位指令
unsigned char Dot_Mask_Buf=0x01;
int i=0;
uchar tem,key;
//LCD_Init();
//LCD_DisplayCharacter('A');
//LCD_Init_G();
//LCD_WriteControl(0x34);
//LCD_WriteControl(0x80|0x03);
//LCD_WriteControl(0x80|0x03);
//LCD_WriteData(0xff);
//LCD_WriteControl(0x34);
//lcd_draw_dot(11,11);
LCD_Fill(0xff);
//这里利用了开发板4键键盘做了下测试
DDRB=0x00;
PORTB=0xff;
while(1)
{
tem=PINB; //读取端口b
if(tem!=0xff) //判断是否有按键按下
{
s_ms(500); //排除按键抖动和抗干扰
key=PINB;
if(key==tem)
{LCD_Fill(0xff);
if(key==0x7f)
{aaaa(2);}
if(key==0xbf)
{aaaa(4);}
if(key==0xdf)
{aaaa(6);}
if(key==0xef)
{aaaa(8);}
}
}
}
//这里利用了开发板键盘做了下测试
}

点赞 2009-11-29 16:06

沙发 niux

文件lcd.c

#include "LCD.h"
#include
#include
#include
/**IO定义**/
#define BIT7 0x80
#define BIT6 0x40
#define BIT5 0x20
#define BIT4 0x10
#define BIT3 0x08
#define BIT2 0x04
#define BIT1 0x02
#define BIT0 0x01

volatile unsigned char *LCD_EN_PORT = &PORTA;
volatile unsigned char *LCD_DIR_PORT = &DDRD; //DDRD  0输入  1输出
volatile unsigned char *LCD_DIR_CTL = &DDRA; //DDRA  0输入  1输出
volatile unsigned char *LCD_IP_PORT = &PIND;
volatile unsigned char *LCD_OP_PORT = &PORTD;
volatile unsigned char *LCD_RS_PORT = &PORTA;
volatile unsigned char *LCD_RW_PORT = &PORTA;
char LCD_EN_BIT = BIT(7);
char LCD_RS_BIT = BIT(5);
char LCD_RW_BIT = BIT(6);

//宏设置
#define SET_LCD_E          *LCD_EN_PORT |= LCD_EN_BIT  //EN=1
#define CLEAR_LCD_E    *LCD_EN_PORT &= ~LCD_EN_BIT //EN=0
#define SET_EN_1       *LCD_EN_PORT |= LCD_EN_BIT  //EN=1
#define SET_EN_0       *LCD_EN_PORT &= ~LCD_EN_BIT //EN=0

#define SET_LCD_DATA    *LCD_RS_PORT |= LCD_RS_BIT  //RS=1
#define SET_LCD_CMD    *LCD_RS_PORT &= ~LCD_RS_BIT //RS=0
#define SET_RS_1       *LCD_RS_PORT |= LCD_RS_BIT  //RS=1
#define SET_RS_0       *LCD_RS_PORT &= ~LCD_RS_BIT //RS=0

#define SET_LCD_READ    *LCD_RW_PORT |= LCD_RW_BIT  //RW=1
#define SET_LCD_WRITE    *LCD_RW_PORT &= ~LCD_RW_BIT //RW=0
#define SET_RW_1       *LCD_RW_PORT |= LCD_RW_BIT  //RW=1
#define SET_RW_0       *LCD_RW_PORT &= ~LCD_RW_BIT //RW=0

//LCD指令宏定义
#define LCD_ON 0x0C
#define LCD_CURS_ON 0x0D
#define LCD_OFF 0x08
#define LCD_HOME 0x02
#define LCD_CLEAR 0x01
#define LCD_NEW_LINE 0xC0
#define LCD_FUNCTION_SET 0x38
#define LCD_MODE_SET 0x06

#define LCD_EXTOFF 0x34    // 扩充指令集，关闭绘图显示
#define LCD_EXTON 0x36    // 扩充指令集，打开绘图显示

//888888888888888888硬件底层接口88888888888888888888888//
//忙检测
unsigned char LCD_Busy ( void )
{
unsigned char temp;

CLEAR_LCD_E;

*LCD_DIR_PORT = 0x00;
*LCD_DIR_CTL |= LCD_RS_BIT|LCD_RW_BIT|LCD_EN_BIT; //控制端口方向设定

SET_LCD_READ;
SET_LCD_CMD;

SET_LCD_E;

asm("nop");

temp = *LCD_IP_PORT;

CLEAR_LCD_E;

return temp;
}

//写指令
void LCD_WriteControl (unsigned char CMD)
{
while (LCD_Busy()& 0X80);

CLEAR_LCD_E;

SET_LCD_WRITE ;
SET_LCD_CMD;

*LCD_DIR_PORT = 0xFF;

  asm("nop");

SET_LCD_E;

asm("nop");

*LCD_OP_PORT = CMD;

asm("nop");
asm("nop");

CLEAR_LCD_E;
}

//写数据
void LCD_WriteData (unsigned char Data)
{

while (LCD_Busy() & 0X80); // Test if LCD Busy

CLEAR_LCD_E;    // Disable LCD

SET_LCD_WRITE ; // Set LCD to write
SET_LCD_DATA; // Set LCD to data

*LCD_DIR_PORT = 0xFF; // LCD port output

  asm("nop");

SET_LCD_E;         // Write data to LCD

asm("nop");

*LCD_OP_PORT = Data; // Load data to port

asm("nop");
asm("nop");

CLEAR_LCD_E;       // Disable LCD
}
//读数据
unsigned char LCD_ReadData(void)
{
  unsigned char Read_Data;
  *LCD_DIR_PORT = 0x00;                //的端口想要输入前，要先给端口全置1
  *LCD_OP_PORT = 0xff;
  SET_LCD_DATA;                   //A0置高，示意进行显存数据操作
  SET_LCD_READ;                   //RW置高，示意进行读出操作
  s_ms(10);
  CLEAR_LCD_E;                   //EP先置低，以便后面产生跳变沿
  SET_LCD_E;                   //产生有效的跳变沿
  s_ms(10);
  Read_Data = *LCD_IP_PORT;          //读出数据
  s_ms(10);
  CLEAR_LCD_E;
  return Read_Data;                //返回读到的数据
}

////////8888888888888888字符操作88888888888888888//////////
//初始化LCD
void LCD_Init(void)
{
LCD_WriteControl (LCD_FUNCTION_SET); //0x38 0011 1000
asm("nop");
LCD_WriteControl (LCD_OFF);          //0x08 0000 1000
LCD_WriteControl (LCD_CLEAR);       //0x01 0000 0001
LCD_WriteControl (LCD_MODE_SET);    //0x06 0000 0110
LCD_WriteControl (LCD_ON);          //0x0C 0000 1100
LCD_WriteControl (LCD_HOME);          //0x02 0000 0010
}

//清屏
void LCD_Clear(void)
{
LCD_WriteControl(0x01);
}

//市焦点回到起始位置
void LCD_Home(void)
{
LCD_WriteControl(0x02);
}

//在当前焦点输出一个字符
void LCD_DisplayCharacter (char Char)
{
LCD_WriteData (Char);
}

//通过坐标输出字符串
void LCD_DisplayString_F (char row, char column ,const unsigned char *string)
{
LCD_Cursor (row, column);
while (*string)
LCD_DisplayCharacter (*string++);
}

//通过坐标输出字符串
void LCD_DisplayString (char row, char column ,unsigned char *string)
{
LCD_Cursor (row, column);
while (*string)
LCD_DisplayCharacter (*string++);
}

//字符光标定位
void LCD_Cursor (char row, char column)
{
switch (row) {
case 1: LCD_WriteControl (0x80 + column - 1); break;
case 2: LCD_WriteControl (0x90 + column - 1); break;
case 3: LCD_WriteControl (0x88 + column - 1); break;
case 4: LCD_WriteControl (0x98 + column - 1); break;
default: break;
}
}

//显示光标
void LCD_Cursor_On (void)
{
LCD_WriteControl (LCD_CURS_ON);
}

//关闭光标
void LCD_Cursor_Off (void)
{
LCD_WriteControl (LCD_ON);
}

//关闭LCD
void LCD_Display_Off (void)
{
LCD_WriteControl(LCD_OFF);
}

//打开LCD
void LCD_Display_On (void)
{
LCD_WriteControl(LCD_ON);
}

//888888888888888图形驱动888888888888888888888888888///////////
//延时程序
void TimeDelay(int Time)
{
int i;
if(Time > 0)
{
for(i = 0;i < 800;i++)
{
}
Time --;
}
}
//图形模式初始化
void LCD_Init_G(void)
{
//LCD 驱动所使用到的端口的初始化（如果有必要的话）
// LCD_PortInit();
SET_RS_0;
TimeDelay(200);
SET_RS_1;
LCD_WriteControl(0xaf); //LCD On
LCD_WriteControl(0x2f); //设置上电控制模式
LCD_WriteControl(0x81); //电量设置模式（显示亮度）
LCD_WriteControl(0x1f); //指令数据0x0000~0x003f
LCD_WriteControl(0x27); //V5 内部电压调节电阻设置
LCD_WriteControl(0xa2); //LCD 偏压设置
LCD_WriteControl(0xc8); //Com 扫描方式设置,反向
LCD_WriteControl(0xa0); //Segment 方向选择,正常
LCD_WriteControl(0xa4); //全屏点亮/变暗指令
LCD_WriteControl(0xa6); //正向反向显示控制指令
LCD_WriteControl(0xac); //关闭静态指示器
LCD_WriteControl(0x00); //指令数据
LCD_WriteControl(0x40 +32); //设置显示起始行对应RAM
LCD_WriteControl(0xe0); //设置读写改模式
LCD_WriteControl(0x34);
}
//========================================================================
// 绘点函数
//========================================================================
void LCD_Point(unsigned char x,unsigned char y,unsigned char i)
{
unsigned char add_x=0x80;                //GDRAM水平地址
unsigned char add_y=0x80;                //GDRAM垂直地址

unsigned char x_low,x_hight;    //定义列地址的高低位指令
unsigned char x_low_old=0xff;
unsigned char x_hight_old=0xff;
//控制x，y的值
x = 0x7f&x;
y = 0x3f&y;

if(i==0)
{
switch(x&0x0f)
  {
   case 0: x_hight = ~0x80;x_low = ~0x00;break;
   case 1: x_hight = ~0x40;x_low = ~0x00;break;
   case 2: x_hight = ~0x20;x_low = ~0x00;break;
   case 3: x_hight = ~0x10;x_low = ~0x00;break;
   case 4: x_hight = ~0x08;x_low = ~0x00;break;
   case 5: x_hight = ~0x04;x_low = ~0x00;break;
   case 6: x_hight = ~0x02;x_low = ~0x00;break;
   case 7: x_hight = ~0x01;x_low = ~0x00;break;
   case 8: x_hight = ~0x00;x_low = ~0x80;break;
   case 9: x_hight = ~0x00;x_low = ~0x40;break;
   case 10: x_hight = ~0x00;x_low = ~0x20;break;
   case 11: x_hight = ~0x00;x_low = ~0x10;break;
   case 12: x_hight = ~0x00;x_low = ~0x08;break;
   case 13: x_hight = ~0x00;x_low = ~0x04;break;
   case 14: x_hight = ~0x00;x_low = ~0x02;break;
   case 15: x_hight = ~0x00;x_low = ~0x01;break;
  }
}else
{

switch(x&0x0f)
  {
   case 0: x_hight = 0x80;x_low = 0x00;break;
   case 1: x_hight = 0x40;x_low = 0x00;break;
   case 2: x_hight = 0x20;x_low = 0x00;break;
   case 3: x_hight = 0x10;x_low = 0x00;break;
   case 4: x_hight = 0x08;x_low = 0x00;break;
   case 5: x_hight = 0x04;x_low = 0x00;break;
   case 6: x_hight = 0x02;x_low = 0x00;break;
   case 7: x_hight = 0x01;x_low = 0x00;break;
   case 8: x_hight = 0x00;x_low = 0x80;break;
   case 9: x_hight = 0x00;x_low = 0x40;break;
   case 10: x_hight = 0x00;x_low = 0x20;break;
   case 11: x_hight = 0x00;x_low = 0x10;break;
   case 12: x_hight = 0x00;x_low = 0x08;break;
   case 13: x_hight = 0x00;x_low = 0x04;break;
   case 14: x_hight = 0x00;x_low = 0x02;break;
   case 15: x_hight = 0x00;x_low = 0x01;break;
  }
}

  add_y = add_y+(y&0x1f);

  if(y>>5)
  {
       add_x = 0x88;
  }

  add_x = add_x+(x>>4);

  //打开绘图显示
  //LCD_WriteControl(0x34);
  asm("nop");
  LCD_WriteControl(add_y);       //垂直地址
  LCD_WriteControl(add_x);       //水平地址
  LCD_ReadData();
  asm("nop");
  LCD_WriteControl(0x34);
  x_hight_old = LCD_ReadData();
  x_low_old = LCD_ReadData();
  asm("nop");
  LCD_WriteControl(add_y);       //垂直地址
  LCD_WriteControl(add_x);       //水平地址
  asm("nop");
  LCD_WriteData(x_hight&x_hight_old);
  LCD_WriteData(x_low&x_low_old);
  LCD_WriteControl(0x36);
}

void LCD_Fill(unsigned char dat)                //填充GDRAM数据
{
unsigned char i,j,k;
unsigned char add_x=0x80;                //GDRAM水平地址
unsigned char add_y=0x80;                //GDRAM垂直地址
  //打开绘图显示
  LCD_WriteControl(0x36);//init_lcd12864();
for(i=0;i<2;i++)
  {
   for(j=0;j<32;j++)
   {
      for(k=0;k<8;k++)
      {
            LCD_WriteControl(0x36); //打开绘图显示
asm("nop");
            LCD_WriteControl(add_y+j);       //垂直地址
            LCD_WriteControl(add_x+k);       //水平地址
            LCD_WriteData(dat);
            LCD_WriteData(dat);
      }
   }
   add_x=0x88;
  }

      //LCD_WriteControl(0x30);                         //恢复基本指令集
}

void aaaa(unsigned char x)
{
int i = 0;
int j;
for(;i<128;i++)
{
j = sinf(i*(x*_PI/128))*20+30;
LCD_Point(i,j,0);
}
}

点赞 2009-11-29 16:06

引用: 引用 3 楼 whrnkl 的回复:
有个小问题：
在我调用LCD_ReadData（）方法读GDRAM数据时，如果数据为0x00? 读出来为0x01不知道为什么！
有没有人能帮我解答一下！

单步调试一下看看到底是0还是1

点赞 2009-11-30 13:18

ATMega16驱动12864lcd-绘图-画点

回复评论（8）

2推荐 zxhnet

沙发 niux

4楼 yqivy

5楼 howard_lewes

6楼 lshfrandy

7楼 andyye1630

8楼 licaiyanding

9楼 zd169

ATMega16驱动12864lcd-绘图-画点

回复评论 （8）

2推荐 zxhnet

沙发 niux

4楼 yqivy

5楼 howard_lewes

6楼 lshfrandy

7楼 andyye1630

8楼 licaiyanding

9楼 zd169

回复评论（8）