LCD2004的IIC驱动教程

1万 · 2021-1-5 21:20

驱动芯片是8574T的，网上好多都是arduino的库文件。谢谢各位了！

2万 · 2021-1-5 21:24

你按照这个库的内容改改。

2万 · 2021-1-5 21:30

2万 · 2021-1-5 21:33

主要是写指令，写数据。你只要会用I2C就行了。

2万 · 2021-1-5 21:37

#include <reg52.h>
#include <stdlib.h>
#include "common.h"
#include "lcd2004.h"

void main(void)
{
UW16 i ;
UB8 author[]="Author:YangRui" ;

lcd2004Init();

for(i=0 ; i<sizeof(author)-1 ; i++)
{
      lcd2004AddressWriteByte(LCD2004_ROW0,i,author[i]);
}

lcd2004AddressWriteString(LCD2004_ROW1,0,"QQ:279729201");
lcd2004AddressWriteString(LCD2004_ROW2,0,"yangrui90s@163.com");
lcd2004AddressWriteString(LCD2004_ROW3,0,"Date:2014/02/26");

while(1);
}

2万 · 2021-1-5 21:41

#ifndef __LCD2004_H__
#define __LCD2004_H__

#include <reg52.h>
#include "common.h"

sbit lcd2004_rs_bit = P2^6;/*根据硬件连接选择*/
sbit lcd2004_rw_bit = P2^5;/*根据硬件连接选择*/
sbit lcd2004_en_bit = P2^7;/*根据硬件连接选择*/

#define LCD2004_DATA_PORT       P0/*根据硬件连接选择*/
/*default type:
px^0---DB0(LSB)
px^1---DB1
px^2---DB2
px^3---DB3
px^4---DB4
px^5---DB5
px^6---DB6
px^7---DB7(MSB)
*/

/*
RS       Rw
0          0 ---->write command to lcd2004
0          1 ---->read  lcd2004's  status
1          0 ---->write data to lcd2004
1          1 ---->read  lcd2004's data

*/

//lcd2004_rw_bit  select
#define LCD2004_READ_OPERATION             HIGH_LEVEL
#define LCD2004_WRITE_OPERATION             LOW_LEVEL

//lcd2004_rs_bit select
#define LCD2004_DATA_OPERATION             HIGH_LEVEL
#define LCD2004_COMMAND_OPERATION       LOW_LEVEL

//lcd2004_en_bit  select
#define LCD2004_ENABLE       HIGH_LEVEL
#define LCD2004_DISABLE       LOW_LEVEL



/*display:16(column)x2(row),5x7 lattice,8bit data interface*/
#define LCD2004_DEFAULT_DISPALY_MODE       0x38

/*
====================================================
lcd diaplay on/off and cursor display on/off configure
====================================================
/*
0 0 0 0 1 D C B
                  | | |------cursor blink  : 1-->enable ; 0-->disalbe
                  | |----------cursor display: 1-->enable ; 0-->disable
                  |-------------lcd2004 dispaly: 1-->enable ; 0-->disalbe

*/
#define LCD2004_DISPLAY_ENABLE                      0X04
#define LCD2004_CURSOR_DISPLAY_ENABLE       0X02
#define LCD2004_CURSOR_BLINK_ENABLE       0X01

#define LCD2004_DISPLAY_DISABLE                      (0X04 & (~(0x01<<2)))
#define LCD2004_CURSOR_DISPLAY_DISABLE       (0X02 & (~(0x01<<1)))
#define LCD2004_CURSOR_BLINK_DISABLE       (0X01 & (~(0x01<<0)))

/*默认:lcd显示，光标显示，光标闪烁*/                      /*根据实际需要选择*/
#define LCD2004_DEFAULT_DISPLAY_AND_CURSOR_MODE 0x08                               | \
                                                                              LCD2004_DISPLAY_ENABLE                | \
                                                                              LCD2004_CURSOR_DISPLAY_ENABLE| \
                                                                              LCD2004_CURSOR_BLINK_ENABLE

/*
====================================================
point and cursor address  configure
====================================================
0 0 0 0 0 1 N S
                     | |-----  screen move:1-->enable ; 0-->disable
                     |---------  N=1:读或者写一个字符后地址指针加1，且光标加1
                                 N=0:度或者写一个字符后地址指针减1，且光标减1
                     当S=1时：
                        若N=1，整屏幕左移
                           N=0，整屏幕右移
                        以达到光标不移动，而整个屏幕移动的效果
*/

#define LCD2004_POINT_AND_CURSOR_PLUS             0X02
#define LCD2004_SCREEN_MOVE_ENABLE                      0x01

#define LCD2004_POINT_AND_CURSOR_MINUS             (0X02 & (~(0X01<<1)))
#define LCD2004_SCREEN_MOVE_DISABLE                      (0x01 & (~(0X01<<0)))

/*默认:光标和指针加一，屏幕不移动*/
#define LCD2004_DEFAULT_POINT_AND_POINT_ADDRESS_MODE 0X04                               | \
                                                                                    LCD2004_POINT_AND_CURSOR_PLUS| \
                                                                                    LCD2004_SCREEN_MOVE_DISABLE

#define LCD2004_ROW0       0
#define LCD2004_ROW1       1
#define LCD2004_ROW2       2
#define LCD2004_ROW3       3
#define LCD2004_MIN_ROW LCD2004_ROW0
#define LCD2440_MAX_ROW       LCD2004_ROW3

#define LCD2004_ROW_LENGHT       0X14 //20

#define LCD2004_ROW0_ADDRESS_START (0X80)
#define LCD2004_ROW1_ADDRESS_START (0X80+0X40)
#define LCD2004_ROW2_ADDRESS_START (LCD2004_ROW0_ADDRESS_START+LCD2004_ROW_LENGHT)
#define LCD2004_ROW3_ADDRESS_START (LCD2004_ROW1_ADDRESS_START+LCD2004_ROW_LENGHT)

//instruction:
#define LCD2004_CLEAN_ALL_DISPALY                      0x01/*清屏*/
#define LCD2004_CURSOR_RETURN_TO_ORIGIN             0x02/*光标归位*/

//写命令
extern void lcd2004WriteCommand(UB8 commandCode);

//写数据
extern void lcd2004WriteData(UB8 dataCode);

//lcd20041清屏
extern void lcd2004CleanAll(void) ;

//光标归位
extern void lcd2004CursorHoming(void);

//lcd2004初始化
extern void lcd2004Init(void) ;

//lcd2004地址写字节
extern void lcd2004AddressWriteByte(UB8 row,UB8 column,UB8 dataCode) ;

//lcd2004地址写字符串
extern void lcd2004AddressWriteString(UB8 row,UB8 column,UB8 *stringCode);

#endif       /*__LCD2004_H__*/

2万 · 2021-1-5 21:45

本帖最后由 huanghuac 于 2021-1-5 21:54 编辑

#ifndef __COMMON_H__
#define __COMMON_H__

typedef unsigned char UB8 ;
typedef unsigned short int UW16 ;
typedef unsigned long UL32 ;

typedef char SB8;
typedef short int SW16 ;
typedef long SL32 ;

#define HIGH_LEVEL 1
#define LOW_LEVEL  0

#endif       /*__COMMON_H__*/

2万 · 2021-1-5 21:58

8574T驱动LCD时是用的4线还是8线？

1万 · 2021-1-5 22:02

网上有说是4线模式的，我从LCD2004上也看不出来。

1万 · 2021-2-4 12:34

稍微改动一下应该就可以用的