目录
内 容：实现LCD显示
学 时：4学时
知识点：LCD12864芯片介绍，读写操作时序，电路设计
重点： 读写操作时序
难点：读写操作时序
时间：2022年12月26日 13:30～16:20
总结：
1 了解LCD12864芯片配置
2 使用proteus设计LCD显示电路
3 编程实现LCD显示控制引脚：LCD_Struct.GPIO_Mode = GPIO_Mode_Out_PP; // 推挽输出
数字引脚：LCD_Struct.GPIO_Mode = GPIO_Mode_Out_OD; // 开漏输出
1 2引脚连接电源
15引脚 选择并行通讯 
控制引脚 LCD_Struct.GPIO_Mode = GPIO_Mode_Out_PP; // 推挽输出
数字引脚 LCD_Struct.GPIO_Mode = GPIO_Mode_Out_OD; // 开漏输出
LCD_Init();
LCD_DIS_Char(0,0,"Welcome System",MIDDLE);
LCD_DIS_Char(2,0,"Please login",MIDDLE);
while (1)
{
if(isRec==1){
LCD_CLEAR_ALL();
if(pd==1){
LCD_DIS_Char(0,0,name,MIDDLE);
//LCD_DIS_Char(3,0,id,MIDDLE);
LCD_DIS_Char(6,0,"Login succeeded",MIDDLE);
}else{
LCD_DIS_Char(4,0,"Login failed",MIDDLE);
}
isRec=3;
}
if(isRec==3&&bh=='1'){
LCD_CLEAR_ALL();
LCD_DIS_Char(0,0,"Item:Ibuprofen",MIDDLE);
LCD_DIS_Char(3,0,"Number:",MIDDLE);
LCD_DIS_Number(3,60,8,MIDDLE);
LCD_DIS_Char(6,0,"Weight:gram",MIDDLE);
bh=0;
}
if(isRec==3&&bh=='2'){
LCD_CLEAR_ALL();
LCD_DIS_Char(0,0,"Item:Penicillin",MIDDLE);
LCD_DIS_Char(3,0,"Number:",MIDDLE);
LCD_DIS_Number(3,60,16,MIDDLE);
LCD_DIS_Char(6,0,"Weight:gram",MIDDLE);
bh=0;
}
if(isRec==3&&bh=='3'){
LCD_CLEAR_ALL();
LCD_DIS_Char(0,0,"Item:Vitamin C",MIDDLE);
LCD_DIS_Char(3,0,"Number:",MIDDLE);
LCD_DIS_Number(3,60,3,MIDDLE);
LCD_DIS_Char(6,0,"Weight:kilogram",MIDDLE);
bh=0;
}
if(isRec==3&&bh=='4'){
LCD_CLEAR_ALL();
LCD_DIS_Char(0,0,"Item:Vitamin D",MIDDLE);
LCD_DIS_Char(3,0,"Number:",MIDDLE);
LCD_DIS_Number(3,60,86,MIDDLE);
LCD_DIS_Char(6,0,"Weight:gram",MIDDLE);
bh=0;
}
if(isRec==3&&bh=='5'){
LCD_CLEAR_ALL();
LCD_DIS_Char(0,0,"Item:Pepsin ",MIDDLE);
LCD_DIS_Char(3,0,"Number:",MIDDLE);
LCD_DIS_Number(3,60,59,MIDDLE);
LCD_DIS_Char(6,0,"Weight:gram",MIDDLE);
bh=0;
}
if(isRec==3&&bh=='6'){
LCD_CLEAR_ALL();
LCD_DIS_Char(0,0,"Item:Aspirin ",MIDDLE);
LCD_DIS_Char(3,0,"Number:",MIDDLE);
LCD_DIS_Number(3,60,9,MIDDLE);
LCD_DIS_Char(6,0,"Weight:gram",MIDDLE);
bh=0;
}#include "lcd.h"
#include "delay.h"
static u8 INITIAL_COLUNM=0;
void LCD_FUNCTION_Config(void)
{
GPIO_InitTypeDef LCD_Struct;
RCC_APB2PeriphClockCmd(LCD12864_Periph,ENABLE);
LCD_Struct.GPIO_Mode = GPIO_Mode_Out_PP; //控制引脚
LCD_Struct.GPIO_Speed = GPIO_Speed_50MHz;
LCD_Struct.GPIO_Pin = LCD12864_RES_GPIO;
GPIO_Init(LCD12864_GPIO,&LCD_Struct);
LCD_Struct.GPIO_Pin = LCD12864_E_GPIO; //高电平
GPIO_Init(LCD12864_GPIO,&LCD_Struct);
LCD_Struct.GPIO_Pin = LCD12864_RS_GPIO;
GPIO_Init(LCD12864_GPIO,&LCD_Struct);
LCD_Struct.GPIO_Pin = LCD12864_RW_GPIO;
GPIO_Init(LCD12864_GPIO,&LCD_Struct);
LCD_Struct.GPIO_Pin = LCD12864_CS1_GPIO;
GPIO_Init(LCD12864_GPIO,&LCD_Struct);
LCD_Struct.GPIO_Pin = LCD12864_CS2_GPIO;
GPIO_Init(LCD12864_GPIO,&LCD_Struct);
}
void LCD_GPIO_Config(void)
{
GPIO_InitTypeDef LCD_Struct;
RCC_APB2PeriphClockCmd(LCD12864_Periph,ENABLE);
LCD_Struct.GPIO_Mode = GPIO_Mode_Out_OD; //数字引脚
LCD_Struct.GPIO_Speed = GPIO_Speed_50MHz;
LCD_Struct.GPIO_Pin = LCD12864_DATA_GPIO;
GPIO_Init(LCD12864_GPIO,&LCD_Struct);
}
void LCD_Init(void) //lcd初始化
{
LCD_GPIO_Config();
LCD_FUNCTION_Config();
LCD12864_RES_0;
delay_ms(10);
LCD12864_RES_1;
delay_ms(50);
LCD_CMD_DIS(ON);
LCD_INITIAL_COLUNM(INITIAL_COLUNM);
}
void LCD_GPIO_MASK(u8 data) //数据掩码包装
{
u16 mask;
mask = GPIO_ReadOutputData(LCD12864_GPIO) & 0XFF00 ;
mask = mask | data ;
GPIO_Write(LCD12864_GPIO,mask);
}
void LCD_CMD_BUSY(void) //忙检测
{
LCD12864_RS_CMD;
LCD12864_RW_R;
LCD12864_E_1;
LCD_GPIO_MASK(0xFF);
while(1)
{
LCD12864_E_0;
delay_us(2);
LCD12864_E_1;
if(!(GPIO_ReadInputData(LCD12864_GPIO)&CMD_BUSY))
break;
}
LCD12864_E_0;
}
//parameter: ON/OFF
void LCD_CMD_DIS(u8 Switch)
{
LCD_CMD_BUSY();
LCD12864_RS_CMD;
LCD12864_RW_W;
LCD12864_E_1;
if(Switch)
LCD_GPIO_MASK(CMD_DIS_ON);
else
LCD_GPIO_MASK(CMD_DIS_OFF);
delay_us(2);
LCD12864_E_0;
}
void LCD_DIS_SELECT(u8 select) //0全灭 1左屏 2右屏 3全屏
{
select%=4;
switch(select)
{
case DIS_RIGHT:
LCD12864_CS2_ON;
LCD12864_CS1_OFF;
break;
case DIS_LEFT:
LCD12864_CS2_OFF;
LCD12864_CS1_ON;
break;
case DIS_ALL:
LCD12864_CS2_ON;
LCD12864_CS1_ON;
break;
case DIS_NONE:
LCD12864_CS2_OFF;
LCD12864_CS1_OFF;
break;
}
}
//指令起始行
//parameter: 0-63
void LCD_INITIAL_COLUNM(u8 Colunm)
{
Colunm%=64;
Colunm = 64 - Colunm;
LCD_CMD_BUSY();
LCD12864_RS_CMD;
LCD12864_RW_W;
LCD12864_E_1;
Colunm = CMD_COLUNM|Colunm;
LCD_GPIO_MASK(Colunm);
delay_us(2);
LCD12864_E_0;
}
//指令写入数据显示列
//parameter: 0-128
void LCD_CMD_Line(u8 Line)
{
Line %= 128;
if(Line<64)
{
LCD_DIS_SELECT(DIS_LEFT);
}
else
{
LCD_DIS_SELECT(DIS_RIGHT);
}
LCD_CMD_BUSY();
LCD12864_RS_CMD;
LCD12864_RW_W;
LCD12864_E_1;
Line = CMD_LINE|Line;
LCD_GPIO_MASK(Line);
delay_us(2);
LCD12864_E_0;
}
//指令写入数据显示页
//parameter: 0-7
void LCD_CMD_PAGE(u8 Page)
{
Page%=8;
LCD_CMD_BUSY();
LCD12864_RS_CMD;
LCD12864_RW_W;
LCD12864_E_1;
Page = CMD_PAGE|Page;
LCD_GPIO_MASK(Page);
delay_us(2);
LCD12864_E_0;
}
//写入数据0-7行
void LCD_CMD_COLUNM(u8 Colunm)
{
Colunm%=8;
Colunm=Colunm-INITIAL_COLUNM/8;
LCD_CMD_PAGE(Colunm);
}
//计算数据长度
u8 LCD_NUMS_SIZE(int num)
{
u8 size=0;
if(num==0)
{
size=1;
}else
{
while(num)
{
size++;
num=num/10;
}
}
return size;
}
int LCD_POW(u8 mi) //计算10的次方
{
int di=1;
while(mi--)
{
di=di*10;
}
return di;
}
void LCD_DATA_WRIRE(u8 data) //写一位数据
{
LCD_CMD_BUSY();
LCD12864_RS_DATA;
LCD12864_RW_W;
LCD12864_E_1;
LCD_GPIO_MASK(data);
delay_us(2);
LCD12864_E_0;
}
//显示一个字符 支持小、中尺寸 反侧显示
//parameter: 行0-7 列0-127 data数据 size尺寸SMALL MIDDLE
void LCD_DIS_Char(u8 row,u8 col,u8* data,int size)
{
u8 length=0;
u8 line;
u8 i;
row%=8;
col%=128;
LCD_CMD_Line(col);
line=col-1;
if(size==SMALL)
{
LCD_CMD_COLUNM(row);
while(data[length])
{
for(i=0;i<6;i++)
{
line+=1;
if(line==64)
{
LCD_CMD_Line(line);
LCD_CMD_COLUNM(row);
}else if(line==128)
{
line=0;
LCD_CMD_Line(line);
LCD_CMD_COLUNM(row);
}
LCD_DATA_WRIRE(CHAR_SMALL[data[length]-32][i]);
}
length++;
}
}else if(size==MIDDLE)
{
while(data[length])
{
LCD_CMD_COLUNM(row);
for(i=0;i<16;i++)
{
line+=1;
if(i==8)
{
if(line<8)
line=128-(8-line);
else
line-=8;
LCD_CMD_Line(line);
LCD_CMD_COLUNM(row+1);
}
else if(line==64)
{
LCD_CMD_Line(line);
if(i<8)
{
LCD_CMD_COLUNM(row);
}else if(i>=8)
{
LCD_CMD_COLUNM(row+1);
}
}else if(line==128)
{
line=0;
LCD_CMD_Line(line);
if(i<8)
{
LCD_CMD_COLUNM(row);
}else if(i>=8)
{
LCD_CMD_COLUNM(row+1);
}
}
LCD_DATA_WRIRE(CHAR_MIDDLE[data[length]-32][i]);
}
length++;
}
}
}
//写数字 支持小、中尺寸 数字可支持小数 小数位数只包括2位 反侧显示
//parameter: 行0-7 列0-127 data数据 size尺寸SMALL MIDDLE
void LCD_DIS_Number(u8 row,u8 col,float num,int size)
{
u8 line;
u8 length;
u8 i;
u8 flag=0;
float number=0;
row%=8;
col%=128;
length=LCD_NUMS_SIZE((int)num);
LCD_CMD_Line(col);
line=col-1;
if(num-(int)num>0)
{
flag=1;
number=num;
}
if(size==SMALL)
{
LCD_CMD_COLUNM(row);//1行
while(length--)//6位
{
for(i=0;i<6;i++)
{
line+=1;
if(line==64)
{
LCD_CMD_Line(line);
LCD_CMD_COLUNM(row);
}else if(line==128)
{
line=0;
LCD_CMD_Line(line);
}
if(flag==2)
{
LCD_DATA_WRIRE(CHAR_SMALL[14][i]);
}else
LCD_DATA_WRIRE(CHAR_SMALL[(int)num/LCD_POW(length)+16][i]);
}
if(flag==2)
{
flag=0;
continue;
}
num=(int)num%LCD_POW(length);
if(flag==1&&length==0)
{
flag=2;
length=3;
num=(int)((number- (int)number)*100);
}
}
}else if(size==MIDDLE)//中尺寸
{
while(length--)
{
LCD_CMD_COLUNM(row);
for(i=0;i<16;i++)
{
line+=1;
if(i==8)
{
if(line<8)
line=128-(8-line);
else
line-=8;
LCD_CMD_Line(line);
LCD_CMD_COLUNM(row+1);
}
else if(line==64)
{
LCD_CMD_Line(line);
if(i<8)
{
LCD_CMD_COLUNM(row);
}else if(i>=8)
{
LCD_CMD_COLUNM(row+1);
}
}else if(line==128)
{
line=0;
LCD_CMD_Line(line);
if(i<8)
{
LCD_CMD_COLUNM(row);
}else if(i>=8)
{
LCD_CMD_COLUNM(row+1);
}
}
if(flag==2)
{
LCD_DATA_WRIRE(CHAR_MIDDLE[14][i]);
}else
LCD_DATA_WRIRE(CHAR_MIDDLE[(int)num/LCD_POW(length)+16][i]);
}
if(flag==2)
{
flag=0;
continue;
}
num=(int)num%LCD_POW(length);
if(flag==1&&length==0)
{
flag=2;
length=3;
num=(int)((number-(int)number)*100);
}
}
}else if(size==LONG)//大尺寸
{
while(length--)
{
LCD_CMD_COLUNM(row);
for(i=0;i<36;i++)
{
line+=1;
if(i==12)
{
if(line<12)
line=128-(12-line);
else
line-=12;
LCD_CMD_Line(line);
LCD_CMD_COLUNM(row+1);
}else if(i==24)
{
if(line<12)
line=128-(12-line);
else
line-=12;
LCD_CMD_Line(line);
LCD_CMD_COLUNM(row+2);
}
else if(line==64)
{
LCD_CMD_Line(line);
if(i<12)
{
LCD_CMD_COLUNM(row);
}else if(i>=12&&i<24)
{
LCD_CMD_COLUNM(row+1);
}else if(i>=24)
{
LCD_CMD_COLUNM(row+2);
}
}else if(line==128)
{
line=0;
LCD_CMD_Line(line);
if(i<12)
{
LCD_CMD_COLUNM(row);
}else if(i>=12&&i<24)
{
LCD_CMD_COLUNM(row+1);
}else if(i>=24)
{
LCD_CMD_COLUNM(row+2);
}
}
if(flag==2)
{
LCD_DATA_WRIRE(NUMBER_LONG[10][i]);
}else
LCD_DATA_WRIRE(NUMBER_LONG[(int)num/LCD_POW(length)][i]);
}
if(flag==2)
{
flag=0;
continue;
}
num=(int)num%LCD_POW(length);
if(flag==1&&length==0)
{
flag=2;
length=3;
num=(int)((number-(int)number)*100);
}
}
}
}
//写汉字 支持中、大尺寸 data为库
void LCD_DIS_WORD(u8 row,u8 col,u8* data,int size)
{
u8 length=0;
u8 i;
u8 line;
row%=8;
col%=128;
LCD_CMD_Line(col);
line=col-1;
if(size==MIDDLE)
{
while(data[length]!=0)
{
LCD_CMD_COLUNM(row);
for(i=0;i<20;i++)
{
line+=1;
if(i==10)
{
if(line<10)
line=128-(10-line);
else
line-=10;
LCD_CMD_Line(line);
LCD_CMD_COLUNM(row+1);
}
else if(line==64)
{
LCD_CMD_Line(line);
if(i<10)
{
LCD_CMD_COLUNM(row);
}else if(i>=10)
{
LCD_CMD_COLUNM(row+1);
}
}else if(line==128)
{
line=0;
LCD_CMD_Line(line);
if(i<10)
{
LCD_CMD_COLUNM(row);
}else if(i>=10)
{
LCD_CMD_COLUNM(row+1);
}
}
LCD_DATA_WRIRE(WORD_MIDDLE[data[length]-1][i]);
}
length++;
}
}else if(size==LONG)
{
while(data[length]!=0)
{
LCD_CMD_COLUNM(row);
for(i=0;i<32;i++)
{
line+=1;
if(i==16)
{
if(line<16)
line=128-(16-line);
else
line-=16;
LCD_CMD_Line(line);
LCD_CMD_COLUNM(row+1);
}
else if(line==64)
{
LCD_CMD_Line(line);
if(i<16)
{
LCD_CMD_COLUNM(row);
}else if(i>=16)
{
LCD_CMD_COLUNM(row+1);
}
}else if(line==128)
{
line=0;
LCD_CMD_Line(line);
if(i<16)
{
LCD_CMD_COLUNM(row);
}else if(i>=16)
{
LCD_CMD_COLUNM(row+1);
}
}
LCD_DATA_WRIRE(WORD_LONG[data[length]-1][i]);
}
length++;
}
}
}
//图片显示 尺寸64*128
void LCD_DIS_PICTURE(void)
{
u8 row;
u8 col;
for(row=0;row<8;row++)
{
LCD_CMD_Line(0);
LCD_CMD_COLUNM(row);
for(col=0;col<128;col++)
{
if(col==64){
LCD_CMD_Line(64);
LCD_CMD_COLUNM(row);
}
if(col<64)
{
LCD_DATA_WRIRE(BMP_TEST[row*2][col]);
}else if(col>=64)
{
LCD_DATA_WRIRE(BMP_TEST[row*2+1][col-64]);
}
}
}
}
//清除屏幕单独一行
void LCD_CLEAR_COL(u8 row)
{
u8 j;
LCD_DIS_SELECT(DIS_ALL);
LCD_CMD_COLUNM(row);
for(j=0;j<128;j++)
{
LCD_DATA_WRIRE(0xFF);
}
}
//清除全屏
void LCD_CLEAR_ALL(void)
{
u8 i;
u8 j;
LCD_DIS_SELECT(DIS_ALL);
for(i=0;i<8;i++)
{
LCD_CMD_COLUNM(i);
for(j=0;j<128;j++)
{
LCD_DATA_WRIRE(0xFF);
}
}
}
#ifndef __LCD_H
#define __LCD_H
#include "stm32f10x.h"
#include "word.h"
#define LCD12864_GPIO GPIOC
#define LCD12864_Periph RCC_APB2Periph_GPIOC
#define LCD12864_E_GPIO GPIO_Pin_8
#define LCD12864_RW_GPIO GPIO_Pin_9
#define LCD12864_RS_GPIO GPIO_Pin_10
#define LCD12864_CS2_GPIO GPIO_Pin_11
#define LCD12864_CS1_GPIO GPIO_Pin_12
#define LCD12864_RES_GPIO GPIO_Pin_13
#define LCD12864_DATA_GPIO GPIO_Pin_0|GPIO_Pin_1| GPIO_Pin_2| GPIO_Pin_3| GPIO_Pin_4| GPIO_Pin_5| GPIO_Pin_6|GPIO_Pin_7
#define LCD12864_RES_0 GPIO_ResetBits(LCD12864_GPIO,LCD12864_RES_GPIO)
#define LCD12864_RES_1 GPIO_SetBits(LCD12864_GPIO,LCD12864_RES_GPIO)
#define LCD12864_E_0 GPIO_ResetBits(LCD12864_GPIO,LCD12864_E_GPIO)
#define LCD12864_E_1 GPIO_SetBits(LCD12864_GPIO,LCD12864_E_GPIO)
#define LCD12864_RW_W GPIO_ResetBits(LCD12864_GPIO,LCD12864_RW_GPIO)
#define LCD12864_RW_R GPIO_SetBits(LCD12864_GPIO,LCD12864_RW_GPIO)
#define LCD12864_RS_CMD GPIO_ResetBits(LCD12864_GPIO,LCD12864_RS_GPIO)
#define LCD12864_RS_DATA GPIO_SetBits(LCD12864_GPIO,LCD12864_RS_GPIO)
#define LCD12864_CS1_ON GPIO_ResetBits(LCD12864_GPIO,LCD12864_CS1_GPIO)
#define LCD12864_CS1_OFF GPIO_SetBits(LCD12864_GPIO,LCD12864_CS1_GPIO)
#define LCD12864_CS2_ON GPIO_ResetBits(LCD12864_GPIO,LCD12864_CS2_GPIO)
#define LCD12864_CS2_OFF GPIO_SetBits(LCD12864_GPIO,LCD12864_CS2_GPIO)
//开启或关闭
#define ON 1
#define OFF 0
//LCD命令
#define CMD_DIS_ON 0X3F
#define CMD_DIS_OFF 0X3E
#define CMD_BUSY 0X80
#define CMD_COLUNM 0XC0
#define CMD_LINE 0X40
#define CMD_PAGE 0XB8
//显示屏幕选择
#define DIS_NONE 0
#define DIS_LEFT 1
#define DIS_RIGHT 2
#define DIS_ALL 3
//尺寸
#define SMALL 1
#define MIDDLE 2
#define LONG 3
//方向选择
#define UP 1
#define DOWN 2
//内部处理函数
void LCD_CMD_DIS(u8 Switch); //开关函数
void LCD_CMD_COLUNM(u8 Colunm);//指定初始行
void LCD_CMD_Line(u8 Line); //写入列
void LCD_CMD_COLUNM(u8 Colunm); //写入页
void LCD_INITIAL_COLUNM(u8 Colunm);//初始行
void LCD_DATA_WRIRE(u8 data); //写一位数据
void LCD_CMD_PAGE(u8 Page); //初始页
//外部调用函数
void LCD_Init(void); //初始化
void LCD_DIS_Char(u8 row,u8 col,u8* data,int size);//显示字符
void LCD_MODE_ROLL(u8 path,u8 step,u8 direction,u16 delay);//滚动模式
void LCD_DIS_Number(u8 row,u8 col,float num,int size);//显示数字
void LCD_CLEAR_COL(u8 row);//清零一行
void LCD_CLEAR_ALL(void);//清屏
void LCD_DIS_WORD(u8 row,u8 col,u8* data,int size);//写字
void LCD_DIS_PICTURE(void);//显示罗小黑图片
#endif