LPC2138微控制器之LCD12864实例

嵌入式领域使用得比较多的LCD是字符型、图形和TFT型LCD，此处选用Proteus支持的HDG12864F-3图形LCD进行模拟仿真。

首先需要熟悉HDG12864F-3的管脚功能、工作电压、工作原理，可以通过Hantronix官网下载相关手册。

电源配置如下：

其中一个很重要的部分是SED1565控制器的命令集：

 

Proteus仿真电路原理图如下：

实际调试的过程中发现，当HDG12864F-3横屏放置和竖屏放置时，其横纵轴随之变化（可能是Proteus的一个bug吧）。

源代码分为SED1565控制器和LCD显示两部分。

sed1565.h

#ifndef __LPC2138_SED1565_H__
#define __LPC2138_SED1565_H__

#define BIT_VALUE(BIT,X) \
{ \
    if (X) {\
        IO1SET = 1 << BIT; \
    } \
    else \
    { \
        IO1CLR = 1 << BIT; \
        IO1CLR = 0x0; \
    } \
}

#define BYTE_SET(OFFSET,X) \
{ \
    IO1CLR = 0xFF << OFFSET; \
    IO1SET = (0xFF & X) << OFFSET; \
}

#define BYTE_GET(OFFSET) ((IO1PIN >> OFFSET) & 0xFF)

/* Reset Signal */
#define RESET(X) BIT_VALUE(20,X)

/* Control/Data Select Signal, 0-Command 1-Data */
#define A0(X) BIT_VALUE(21,X)

/* Read/Write Select Signal, 0-Write, 1-Read */
#define RW(X) BIT_VALUE(22,X)

/* Enable Clock Input */
#define E(X) BIT_VALUE(23,X)

/* Data Bus */
#define DATA(X) BYTE_SET(24,X)
#define RDATA BYTE_GET(24)

void sed1565_init(void);

void open_display(unsigned char temp);

void display_row(unsigned char temp);

void display_page_addr(unsigned char temp);

void display_col(unsigned char temp);

unsigned char read_state(void);

void data_write(unsigned char temp);

unsigned char data_read(unsigned char temp);

void adc_choice(unsigned char temp);

void display_face(unsigned char temp);

void display_all_onoff(unsigned char temp);

void display_deflect_voltage(unsigned char temp);

void read_change_write(void);

void read_change_write_end(void);

void reset(void);

void com_direct_choice(unsigned char temp);

#endif

sed1565.c

#include <lpc213x.h>
#include "sed1565.h"

void sed1565_init(void)
{
    /* Configure P1.20~31 as output pins */
    PINSEL2 = 0x00000000;
    IO1DIR = 0xFFF00000;

}

/*
** CMD1 Display ON/OFF
*/
void open_display(unsigned char temp)
{
 A0(0);
 RW(0);
 E(1);
 if(temp)
 {
     DATA(0xaf);
 }
 else
 {
     DATA(0xae);
 }
 E(0);
 RW(1);
}

/*
** CMD2 Display Start Line Set
*/
void display_row(unsigned char temp)
{
 A0(0);
 RW(0);
 E(1);
 DATA(temp|0x40);
 E(0);
 RW(1);
}

/*
** CMD3 Page Address Set
*/
void display_page_addr(unsigned char temp)
{
 A0(0);
 RW(0);
 E(1);
 DATA(temp|0xb0);
 E(0);
 RW(1);
}

/*
** CMD4 Column Address Set
*/
void display_col(unsigned char temp)
{
 A0(0);
 RW(0);
 E(1);
 DATA((temp>>4)|0x10);
 E(0);
 E(1);
 DATA(temp&0x0f);
 E(0);
 RW(1);
}

/*
** CMD5 Status Read
*/
unsigned char read_state()
{
 unsigned char temp;

 A0(0);
 RW(1);
 E(1);
 temp = RDATA;
 E(0);

 return temp;
}

/*
** CMD6 Display Data Write
*/
void data_write(unsigned char temp)
{
 A0(1);
 RW(0);
 E(1);
 DATA(temp);
 E(0);
 RW(1);
}

/*
** CMD7 Display Data Read
*/
unsigned char data_read(unsigned char temp)
{
 A0(1);
 RW(1);
 E(1);
 DATA(0xff);
 temp = RDATA;
 E(0);

 return temp;
}

/*
** CMD8 ADC Select
** Sets the display RAM address
** SEG output correspondence
** 0:normal, 1:reverse
*/
void adc_choice(unsigned char temp)
{
 A0(0);
 RW(0);
 E(1);
 DATA(0xa0|temp);
 E(0);
 RW(1);
}

/*
** CMD9 Display normal/reverse
** 0:normal, 1:reverse
*/
void display_face(unsigned char temp)
{
 A0(0);
 RW(0);
 E(1);
 DATA(0xa6|temp);
 E(0);
 RW(1);
}

/*
** CMD10 Display all points ON/OFF
** 0: normal display
** 1: all point ON
*/
void display_all_onoff(unsigned char temp)
{
 A0(0);
 RW(0);
 E(1);
 DATA(0xa4|temp);
 E(0);
 RW(1);
}

/*
** CMD11 LCD Bias Set
*/
void display_deflect_voltage(unsigned char temp)
{
 A0(0);
 RW(0);
 E(1);
 DATA(0xa2|temp);
 E(0);
 RW(1);
}

/*
** CMD12 Read/Modify/Write
** Column address increment
** At writ: +1
** At read: 0
*/
void read_change_write()
{
 A0(0);
 RW(0);
 E(1);
 DATA(0xe0);
 E(0);
 RW(1);
}

/*
** CMD13 End
** Clear Read/Modify/Write
*/
void read_change_write_end()
{
 A0(0);
 RW(0);
 E(1);
 DATA(0xee);
 E(0);
 RW(1);
}

/*
** CMD14 Reset
** Internal Reset
*/
void reset()
{
 A0(0);
 RW(0);
 E(1);
 DATA(0xe2);
 E(0);
 RW(1);
}

/*
** CMD15 Common Output Mode Select
** Select COM output scan direction
** 0: normal direction
** 1: reverse direction
*/
void com_direct_choice(unsigned char temp)
{
 A0(0);
 RW(0);
 E(1);
 DATA(0xb0|(temp<<4));
 E(0);
 RW(1);
}

lcd.h

#ifndef __LPC2138_LCD_H__
#define __LPC2138_LCD_H__

void lcd_init(void);

void smile(void);

#endif

lcd.c

#include "sed1565.h"
#include "lcd.h"

unsigned char beauty[] = 
{

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xE0,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x7F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0xFF,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x7F,0x7F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0xE0,0xF0,0xF0,0xF8,0xFC,0xFC,0xFC,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x5F,0x1F,0x1F,0x1F,0x3F,0x7F,0x7F,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0x7F,0x1F,0x0F,0x03,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x01,0x01,0x01,0x01,0x01,0x03,0x02,0x20,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF8,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFB,0xF3,0xF7,0xE7,0xAF,0xAF,0x9F,0x03,0x00,0x03,0x03,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x00,0x01,0x43,0xE3,0x07,0xDF,0xBF,0x7F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7F,0x3F,
0x0F,0x07,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x3F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xFE,0xFC,0xF0,0xE9,0xF1,0xF1,0x87,0x03,0x01,0x7C,0x5A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0E,0x01,0x00,0x00,0x00,0x00,0x80,0xC1,0x3F,0x1F,0x03,0x02,0x02,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x07,0x1F,0x3F,0x3F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF1,0xE1,0xE0,0xC0,0xC0,0x40,0x40,0x40,0x40,0x80,0x80,0x80,0x80,0xC0,0xC0,0xE0,0xA0,0x90,0x98,0x08,0x04,0x02,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x09,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF3,0xF3,0xE3,0xE3,0xF1,0xF1,0xF0,0xF8,0xFC,0xFC,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0xEE,0xFE,0xFE,
0xF4,0xFC,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0x78,0xF0,0xE0,0x80,0x40,0x80,0x80,0x80,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x08,0x08,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x7D,0xFB,0xFA,0xFA,0xD7,0x1F,0x1F,0x3F,0x7D,0xE1,0xC2,0x88,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0xA0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x00,0x80,0x80,0x80,0x80,0xE0,0xC0,0xE0,0xE0,0xE0,0xE0,0xE0,0xF0,0xE0,0xC0,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xF5,0xC2,0x82,0x00,0x01,0x07,0x0F,0x08,0x10,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x00,0x01,0x00,0x00,0x01,0x01,0x01,0x01,0x03,0x03,0x02,0x03,0x03,0x03,0x02,0x06,0x06,0x07,0x0F,0x0F,0x0F,0x0F,0x1F,0x1F,0x1F,0x1F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x7F,0x7F,0x7F,0x7F,

};

void lcd_init(void)
{
    sed1565_init();
}

void smile(void)
{
 unsigned char a, b;
 
    for(a = 0; a < 8; a++)
  {
        reset();
        display_col(0);
        display_page_addr(a);
        for(b = 0; b < 128; b++)
        {
            data_write(beauty[a * 128 + b]);
        }
  }
}

其中beauty数组是通过LCD12864图片取模软件生成的。

显示效果如下：