📄 st7066.c
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//*************************************************************************************
//-----------------------------通用字符型LCM测试程序-----------------------------------
//*************************************************************************************
//MCU： AT89C52
//LCD Drive: SPLC708D/S6A0069/KS0066U
//实用范围：
// 0801，0802，1601.1602,2002,2004,4001,4002,4004
//-------------------------------------------------------------------------------------
//--------------------------------------------------------------------------------------
#include <reg51.h>
//--------------------------------------------------------------------------------------
//LCM I/O定义：
sbit RS = P3^5; //;DEFINE LCM WDATA/INSTRUCTION PIN
sbit RW = P3^6; //;DEFINE LCM READ/WRITE PIN
sbit E = P3^7; //;DEFINE LCM CHIP ENABLE PIN
#define KEY P2 //按键
#define LCM_DATA P1 //;DEFINE LCM WDATA BUS PIN
#define DATA_TYPE_4BIT 0 //数据方式为4bit读写方式
#define DATA_TYPE_8BIT 1 //数据方式为8bit读写方式
bit biDataType; //数据方式标志
#define DEALY 2
//--------------------------------------------------------------------------------------
//延时程序,cystal frequency = 12MHz
void Delay10Ms(unsigned char d)
{
unsigned int t;
while(d--)
{
t = 5000;
while(t--);
}
}
//======================================================================================
//忙查询并等待空闲
void LCMBusyCheck(void)
{
LCM_DATA =0xff;
while (1)
{
RS = 0;
RW = 1;
E = 1;
if ((LCM_DATA & 0x80) == 0x00) break;
E = 0;
}
}
//======================================================================================
//写入指令
void LCMWriteCommand(unsigned char d)
{
char t = DEALY;
t = 10;
while(--t);
// LCMBusyCheck();
RS = 0; //选择指令寄存器
RW = 0;
LCM_DATA = d;
while(--t);
E = 1; //写入
E = 0;
if (biDataType == DATA_TYPE_4BIT) //4位数据方式
{
RS = 0; //选择指令寄存器
RW = 0;
LCM_DATA = (d << 4);
t = DEALY;
while(t--);
E = 1; //写入
E = 0;
}
}
//======================================================================================
//写入数据
void LCMWriteData(unsigned char d)
{
char t = DEALY;
t = 10;
while(--t);
// LCMBusyCheck();
RS = 1; //选择数据寄存器
RW = 0;
LCM_DATA = d;
while(t--);
E = 1; //写入
E = 0;
if (biDataType == DATA_TYPE_4BIT) //4位数据方式
{
RS = 1; //选择数据寄存器
RW = 0;
LCM_DATA = (d << 4);
t = DEALY;
while(t--);
E = 1; //写入
E = 0;
}
}
//=======================================================================================
//上电时，不查询busy信号的写入指令方式
void LCMWriteInitCommand(unsigned char d)
{
char t = DEALY;
RS = 0; //选择指令寄存器
RW = 0;
LCM_DATA = d;
while(t--);
E = 1; //写入
E = 0;
if (biDataType == DATA_TYPE_4BIT) //4位数据方式
{
RS = 0; //选择指令寄存器
RW = 0;
LCM_DATA = d << 4;
t = DEALY;
while(t--);
E = 1; //写入
E = 0;
}
}
//======================================================================================
//LCM初始化
void LCMInit(void)
{
/*
Delay10Ms(3); //等待30ms
LCMWriteInitCommand(0x30); //不查询busy写入指令
Delay10Ms(3); //等待30ms
LCMWriteCommand(0x30); //8bit数据方式
Delay10Ms(3); //等待30ms
LCMWriteCommand(0x38); //8bit数据方式，2行显示
Delay10Ms(3); //等待30ms
LCMWriteCommand(0x0c); //display on,cursor off,blinks off
Delay10Ms(3); //等待30ms
LCMWriteCommand(0x06); //cursor shift = increment
Delay10Ms(3); //等待30ms
LCMWriteCommand(0x01); //clear display
Delay10Ms(3); //等待30ms
*/
LCMWriteCommand(0x01); //clear display
Delay10Ms(1); //等待10ms,等待清零结束，否则如果立即写入显示数据，会造成第一行前面的字没显示
if(!biDataType)
{
//4bit数据方式
LCMWriteInitCommand(0x20); //不查询busy写入指令
Delay10Ms(1); //等待30ms
LCMWriteInitCommand(0x20); //不查询busy写入指令
Delay10Ms(1); //等待30ms
LCMWriteCommand(0x20);
Delay10Ms(1); //等待30ms
LCMWriteCommand(0x28); //4bit数据方式，2行显示
}
else
{
//8bit数据方式
LCMWriteInitCommand(0x30); //不查询busy写入指令
Delay10Ms(1); //等待30ms
LCMWriteInitCommand(0x30); //不查询busy写入指令
Delay10Ms(1); //等待30ms
LCMWriteCommand(0x30);
Delay10Ms(1); //等待30ms
LCMWriteCommand(0x38); //8bit数据方式，2行显示
}
LCMWriteCommand(0x0c); //display on,cursor off,blinks off
LCMWriteCommand(0x06); //cursor shift = increment
}
//======================================================================================
void LCMWriteExtendASIC(void)
{
unsigned char i;
for(i = 0xc0;i != 0;i++)
{
LCMWriteData(i);
}
}
//======================================================================================
//2个自定义字符的点阵数据写入CGRAM中
void LCMWriteMyChar(void)
{
unsigned char code disp1[8] = {0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f,0x1f};
unsigned char code disp2[8] = {0x15,0x15,0x15,0x15,0x15,0x15,0x15,0x15};
unsigned char code disp3[8] = {0x1f,0x11,0x11,0x11,0x11,0x11,0x11,0x1f};
unsigned char i;
LCMWriteCommand(0x40); //Set 第一个CGRAM address
for(i = 0;i <8;i++)
{
LCMWriteData(disp1[i]); //写入自定义的点阵数据
}
LCMWriteCommand(0x48); //Set 第二个CGRAM address
for(i = 0;i <8;i++)
{
LCMWriteData(disp2[i]); //写入自定义的点阵数据
}
LCMWriteCommand(0x50); //Set 第二个CGRAM address
for(i = 0;i <8;i++)
{
LCMWriteData(disp3[i]); //写入自定义的点阵数据
}
//自定义符显示
// LCMWriteCommand(0x80); //Set DDRAM address
// LCMWriteData(0); //第一个自定义字符在显存DDRAM address = 0 中
// LCMWriteData(1); //第二个自定义字符在显存DDRAM address = 1 中
}
//======================================================================================
void main(void)
{
unsigned char i,j,d;
unsigned char ucDisplay[]="Fordata LCM Module";
unsigned char ucDiffrenceChar[] = {0x61,0x71,0x81,0x91,0xa1,0xb1,0xc1,0xd1};
biDataType = DATA_TYPE_8BIT; //8位数据方式
// biDataType = DATA_TYPE_4BIT;
LCMInit();
LCMWriteMyChar(); //自定义字符点阵数据写入CGRAM
while(1)
{
//-----------------------------------------------
LCMWriteCommand(0x80); //点全显
for(i=0;i<80;i++)
{
LCMWriteData(0);
}
Delay10Ms(11);
//-----------------------------------------------
LCMWriteCommand(0x01); //clear display
//
LCMWriteCommand(0x80); //写入8个特别选择的特征字符，作为区别不同字库
for(j=10;j!=0;j--)
{
for(i=0;i<8;i++)
{
LCMWriteData(ucDiffrenceChar[i]);
}
}
Delay10Ms(11);
//-----------------------------------------------
LCMWriteCommand(0x80); //全显示“#”
for(i=0;i<80;i++)
{
LCMWriteData('#');
}
Delay10Ms(11);
//-----------------------------------------------
LCMWriteCommand(0x80); //全显示"$"
for(i=0;i<80;i++)
{
LCMWriteData('$');
}
Delay10Ms(11);
//-----------------------------------------------
LCMWriteCommand(0x01); //clear display
//
LCMWriteCommand(0x80); //
LCMWriteExtendASIC(); //将扩展ASIC80个特征字符一次写入DDRAM
Delay10Ms(11);
}
}
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