📄 lcd12864_arm.h
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/*********************************************************************/
/********* LCD12864_arm.H ARM driver *************/
/********** Written by yinlei---20070806 ****************/
/*********************************************************************/
//--------------------------------------
// 数据端口说明!!!!!!!!!! //全为P0口，修改时请修改LcdIOInit（）函数和 ChangeOutPut（）函数对应参数
const unsigned int RS = (1<<18);
const unsigned int RW = (1<<17);
const unsigned int Elcd = (1<<16);
const unsigned int D7 = (1<<15);
const unsigned int D6 = (1<<14);
const unsigned int D5 = (1<<13);
const unsigned int D4 = (1<<12);
const unsigned int D3 = (1<<11);
const unsigned int D2 = (1<<10);
const unsigned int D1 = (1<<9);
const unsigned int D0 = (1<<8);
//---------------------------------------光标记录
extern unsigned int LCDx=0;
extern unsigned int LCDy=0;
//---------------------------------------外部函数----------------------------------------
void Init_Lcd12864(void); //LCD RESET
void ClearAS(void);
void Set_Lcd_xy(unsigned char x,unsigned char y); //定位光标
//---------------------------------------------------------
void DispChar(unsigned int x,unsigned int y,int dataW); //定点显示字符
extern int putchar (int c); //PUTCHAR 重定义
//-----------------------------------------------------------------------
//-----------------------内部函数----------------------------------------
void LcdIOInit(); //IO初始化
void WaitForEnable(void); //忙信号检测
void LcdWrite_C(int CMD,unsigned char AttribC); //write Control Charactor
void LcdWrite_D(int dataW); //写一个数据
unsigned int LcdRead(void); //read a data from LCD
void LCD12864_ARM_DELAY(void); //内部延时
//-------------------------------------------------------------------------
//@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
//-------------------------------------------------------------------------
#define LCD_BUSY_FLAG D7 //用于检查写忙信号
//-----------------------------------------------------------------------
//----------------------具体子函数---------------------------------------
void Set_Lcd_xy(unsigned char x,unsigned char y)
{
LCDx=x;
LCDy=y;
}
//-----------------初始化-------------------------------
void Init_Lcd12864(void)
{
LcdIOInit();
LcdWrite_C(0x30,0); //显示模式设置（不测试忙信号）共三次
LcdWrite_C(0x30,1);
LcdWrite_C(0x0c,1);//0x0f->all on,show arrow;0x0c->no arrow
ClearAS();
}
//-------------------------------------------------------------------
//-----------------------------------------------------------------------
void ClearAS(void)
{
LcdWrite_C(0x01,1);
}
//=======================================================//
// 按指定位置显示一个字符 //
//=======================================================//
void DispChar(unsigned int x,unsigned int y,int dataW)
{ int temp,t;
LcdWrite_C(0x30,1); //command back
temp=x&0x0f;
t=y>>1;
y&=0x01;
if(temp&0x01)
{
temp=temp>>1;
if(y)temp|=0x10;
temp|=0x80;
if(t)temp|=0x08;
LcdWrite_C(temp,1);
LcdRead();
LcdWrite_D(dataW);
}
else
{
temp=temp>>1;
if(y)temp|=0x10;
temp|=0x80;
if(t)temp|=0x08;
LcdWrite_C(temp,1);
LcdWrite_D(dataW);
}
}
extern int putchar (int a)
{
if(LCDx==16){LCDx=0;LCDy++;}
if(LCDy==4){LCDy=0;}
// LcdDisplayBuffer[LCDy][LCDx]=a;
if(a!='\n')
{
DispChar(LCDx,LCDy,a);
LCDx++;
}
else{LCDx=0;LCDy++;}
return 1;
}
//-------------------------------------------------------
//-------------------------------------------------------//
//数据转换输出
//---------------------------------------------------------//
void ChangeOutPut( int a)
{
// IO0CLR|=(D0|D1|D2|D3|D4|D5|D6|D7);
IO0CLR|=(0xff<<8);
IO0SET|=(a<<8);
}
//-----------------------------------------------------------//
//LCDIO初始化设置
//-----------------------------------------------------------//
void LcdIOInit()
{
PINSEL1&=~0x0000003f; //设置RS、RW、Elcd口为GPIO
PINSEL0&=~0Xffff0000; //设置D0~D7口为GPIO
IO0DIR|=(D0|D1|D2|D3|D4|D5|D6|D7|RS|Elcd|RW); //设置为输出模式
}
//------------------------------------------------------//
//写控制字符子程序: E=1 RS=0 RW=0
//------------------------------------------------------//
void LcdWrite_C( int CMD,unsigned char AttribC )
{
if (AttribC)WaitForEnable(); // 检测忙信号?
IO0CLR|=RS; //RS=0
IO0CLR|=RW; //RW=0
IO0SET|=Elcd;
ChangeOutPut(CMD); // 送控制字子程序
LCD12864_ARM_DELAY();
// LCD12864_ARM_DELAY();
// LCD12864_ARM_DELAY();
// LCD12864_ARM_DELAY();
IO0CLR|=Elcd; // 操作允许脉冲信号
}
//------------------------------------------------------//
//当前位置写字符子程序: E =1 RS=1 RW=0
//------------------------------------------------------//
void LcdWrite_D(int dataW )
{
WaitForEnable(); // 检测忙信号
IO0SET|=RS; //RS=1
IO0CLR|=RW; //RW=0
IO0SET|=Elcd;
ChangeOutPut(dataW); //数据发送
LCD12864_ARM_DELAY();
// LCD12864_ARM_DELAY();
// LCD12864_ARM_DELAY();
// LCD12864_ARM_DELAY();
IO0CLR|=Elcd; // 操作允许脉冲信号
}
//------------------------------------------------------//
//读模块子程序：E=1 RS=1 RW=1
//------------------------------------------------------//
unsigned int LcdRead(void)
{
unsigned int dataW;
IO0DIR&=~(D0|D1|D2|D3|D4|D5|D6|D7); //设置为输入模式
IO0DIR|=RS; //设置为输出模式
IO0DIR|=(Elcd|RW); //设置为输出模式
WaitForEnable(); // 检测忙信号
IO0SET|=RS; //RS=1
IO0SET|=RW; //RW=1
IO0SET|=Elcd; //Elcd=1
LCD12864_ARM_DELAY();
dataW=(IO0PIN&(D0|D1|D2|D3|D4|D5|D6|D7));
IO0CLR|=Elcd; // 操作允许脉冲信号
IO0DIR|=(D0|D1|D2|D3|D4|D5|D6|D7); //设置为输出模式
return dataW;
}
//------------------------------------------------------//
//正常读写操作之前必须检测LCD控制器状态: CS=1 RS=0 RW=1
//DB7: 0 LCD控制器空闲; 1 LCD控制器忙
//------------------------------------------------------//
void WaitForEnable( void )
{
IO0DIR&=~(D0|D1|D2|D3|D4|D5|D6|D7); //设置为输入模式
IO0DIR|=(RS|Elcd|RW); //设置为输出模式
IO0CLR|=RS; //RS=0
IO0SET|=RW; //RW=1
IO0SET|=Elcd; //E=1
while(IO0PIN&LCD_BUSY_FLAG);
IO0CLR|=Elcd; //E=0
IO0DIR|=(D0|D1|D2|D3|D4|D5|D6|D7); //设置为输出模式
}
//--------------------------------------------------------------------------
//内部延时 //速度匹配用！
//---------------------------------------------------------------------------
void LCD12864_ARM_DELAY(void)
{
unsigned char i;
for(i=0;i<255;i++);
}
//-------------------End LCD12864.H-----------------------------------------⌨️ 快捷键说明
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