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/*************  功能说明    **************

LCM接口驱动液晶屏程序

8bit I8080模式, P2口接D8~D15

sbit LCD_RS = P4^1;      //数据/命令切换
sbit LCD_WR = P3^6;      //写控制
sbit LCD_RD = P3^7;      //读控制
sbit LCD_CS = P3^4;      //片选
sbit LCD_RESET = P3^5;   //复位

LCM指令通过中断方式等待发送完成

下载时, 选择时钟 24MHz (用户可自行修改频率).

******************************************/


#include    "reg51.h"
#include    "intrins.h"
#include    <stdio.h>
#include    "font.h"

#define     MAIN_Fosc       24000000L   //定义主时钟

typedef     unsigned char   u8;
typedef     unsigned int    u16;
typedef     unsigned long   u32;

sfr IRCBAND  = 0x9D;
sfr IRTRIM = 0x9f;
sfr VRTRIM = 0xa6;

sfr TH2  = 0xD6;
sfr TL2  = 0xD7;
sfr IE2   = 0xAF;
sfr INT_CLKO = 0x8F;
sfr AUXR = 0x8E;
sfr AUXR1 = 0xA2;
sfr P_SW1 = 0xA2;
sfr P_SW2 = 0xBA;
sfr S2CON = 0x9A;
sfr S2BUF = 0x9B;

sfr P4   = 0xC0;
sfr P5   = 0xC8;
sfr P6   = 0xE8;
sfr P7   = 0xF8;
sfr P1M1 = 0x91;    //PxM1.n,PxM0.n     =00--->Standard,    01--->push-pull
sfr P1M0 = 0x92;    //                  =10--->pure input,  11--->open drain
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xB1;
sfr P3M0 = 0xB2;
sfr P4M1 = 0xB3;
sfr P4M0 = 0xB4;
sfr P5M1 = 0xC9;
sfr P5M0 = 0xCA;
sfr P6M1 = 0xCB;
sfr P6M0 = 0xCC;
sfr P7M1 = 0xE1;
sfr P7M0 = 0xE2;

sbit P00 = P0^0;
sbit P01 = P0^1;
sbit P02 = P0^2;
sbit P03 = P0^3;
sbit P04 = P0^4;
sbit P05 = P0^5;
sbit P06 = P0^6;
sbit P07 = P0^7;
sbit P10 = P1^0;
sbit P11 = P1^1;
sbit P12 = P1^2;
sbit P13 = P1^3;
sbit P14 = P1^4;
sbit P15 = P1^5;
sbit P16 = P1^6;
sbit P17 = P1^7;
sbit P20 = P2^0;
sbit P21 = P2^1;
sbit P22 = P2^2;
sbit P23 = P2^3;
sbit P24 = P2^4;
sbit P25 = P2^5;
sbit P26 = P2^6;
sbit P27 = P2^7;
sbit P30 = P3^0;
sbit P31 = P3^1;
sbit P32 = P3^2;
sbit P33 = P3^3;
sbit P34 = P3^4;
sbit P35 = P3^5;
sbit P36 = P3^6;
sbit P37 = P3^7;
sbit P40 = P4^0;
sbit P41 = P4^1;
sbit P42 = P4^2;
sbit P43 = P4^3;
sbit P44 = P4^4;
sbit P45 = P4^5;
sbit P46 = P4^6;
sbit P47 = P4^7;
sbit P50 = P5^0;
sbit P51 = P5^1;
sbit P52 = P5^2;
sbit P53 = P5^3;
sbit P54 = P5^4;
sbit P55 = P5^5;
sbit P56 = P5^6;
sbit P57 = P5^7;

//LCM
#define LCMIFCFG          (*(unsigned char volatile xdata *)0xfe50)
#define LCMCFG2           (*(unsigned char volatile xdata *)0xfe51)
#define LCMIFSTA          (*(unsigned char volatile xdata *)0xfe53)
#define LCMIFCR           (*(unsigned char volatile xdata *)0xfe52)
#define LCMIFDATL         (*(unsigned char volatile xdata *)0xfe54)
#define LCMIFDATH         (*(unsigned char volatile xdata *)0xfe55)

sbit LCD_RS = P4^1;      //数据/命令切换
sbit LCD_WR = P3^6;      //写控制
sbit LCD_RD = P3^7;      //读控制
sbit LCD_CS = P3^4;      //片选
sbit LCD_RESET = P3^5;   //复位

//IO连接
#define  LCD_DataPort P2     //8位数据口

#define  USR_LCM_IF     1			//1: use LCM Interface; 0: use IO mode

//支持横竖屏快速定义切换
#define USE_HORIZONTAL  	  0   //定义液晶屏显示方向 	0-竖屏，1-横屏

//画笔颜色
#define WHITE         	 0xFFFF
#define BLACK         	 0x0000	  
#define BLUE             0x001F  
#define BRED             0XF81F
#define GRED             0XFFE0
#define GBLUE            0X07FF
#define RED           	 0xF800
#define MAGENTA       	 0xF81F
#define GREEN         	 0x07E0
#define CYAN          	 0x7FFF
#define YELLOW        	 0xFFE0
#define BROWN            0XBC40 //棕色
#define BRRED            0XFC07 //棕红色
#define GRAY             0X8430 //灰色

u16 LCD_W;			//LCD 宽度
u16 LCD_H;			//LCD 高度

u16 POINT_COLOR=0x0000;	//画笔颜色

void delay_ms(u16 ms);
void GPIO_Init(void);
void LCM_Config(void);
void LCD_Init(void);
void Test_Color(void);
void LCD_WR_DATA_16Bit(u16 Data);
void LCD_SetWindows(u16 xStar, u16 yStar,u16 xEnd,u16 yEnd);
u16 LCD_Read_ID(void);
void Show_Str(u16 x, u16 y, u16 fc, u16 bc, u8 *str,u8 size,u8 mode);

void main(void)
{
	P0M1 = 0;   P0M0 = 0;   //设置为准双向口
	P1M1 = 0;   P1M0 = 0;   //设置为准双向口
//	P2M1 = 0;   P2M0 = 0;   //设置为准双向口
//	P3M1 = 0;   P3M0 = 0;   //设置为准双向口
//	P4M1 = 0;   P4M0 = 0;   //设置为准双向口
	P5M1 = 0;   P5M0 = 0;   //设置为准双向口
	P6M1 = 0;   P6M0 = 0;   //设置为准双向口
	P7M1 = 0;   P7M0 = 0;   //设置为准双向口

	GPIO_Init();
#if USR_LCM_IF == 1	
	LCM_Config();
	EA = 1;
#endif
	
	LCD_Init(); //LCM初始化

	while(1)
	{
		Test_Color();
	}
}

void LCD_Fill(u16 sx,u16 sy,u16 ex,u16 ey,u16 color)
{  	
	u16 i,j;			
	u16 width=ex-sx+1; 		//得到填充的宽度
	u16 height=ey-sy+1;		//高度
	LCD_SetWindows(sx,sy,ex,ey);//设置显示窗口
	for(i=0;i<height;i++)
	{
		for(j=0;j<width;j++)
		LCD_WR_DATA_16Bit(color);	//写入数据 	 
	}
}

void Test_Color(void)
{
	u16 lcd_id;
	u8 buf[10] = {0};

//	P40 = 0;
	LCD_Fill(0,0,LCD_W,LCD_H,WHITE);
//	P40 = 1;
	while(!LCD_CS);

	lcd_id = LCD_Read_ID();
	sprintf((char *)buf,"ID:0x%x",lcd_id);
	Show_Str(50,25,BLUE,YELLOW,buf,16,1);

	delay_ms(800);
//	P40 = 0;
	LCD_Fill(0,0,LCD_W,LCD_H,RED);
//	P40 = 1;
	delay_ms(800);
//	P40 = 0;
	LCD_Fill(0,0,LCD_W,LCD_H,GREEN);
//	P40 = 1;
	delay_ms(800);
//	P40 = 0;
	LCD_Fill(0,0,LCD_W,LCD_H,BLUE);
//	P40 = 1;
	delay_ms(800);
}

//========================================================================
// 函数: void delay_ms(u16 ms)
// 描述: 延时函数。
// 参数: ms,要延时的ms数, 自动适应主时钟.
// 返回: none.
// 版本: VER1.0
// 日期: 2013-4-1
// 备注: 
//========================================================================
void delay_ms(u16 ms)
{
	 u16 i;
	 do{
			i = MAIN_Fosc / 10000;
			while(--i)    ;   //10T per loop
	 }while(--ms);
}

void Write_Cmd(unsigned char DH,unsigned char DL)
{
#if USR_LCM_IF == 1
	
	LCMIFDATL = DH;
	LCD_CS=0;
	LCMIFCR = 0x84;		//Enable interface, write command out
	while(!LCD_CS);

	LCMIFDATL = DL;
	LCD_CS=0;
	LCMIFCR = 0x84;		//Enable interface, write command out
	while(!LCD_CS);
	
#else
	
	LCD_CS=0;
	LCD_RS=0;
	LCD_WR=0;
	LCD_DataPort=DH;
	LCD_WR=1;
	_nop_();
	LCD_WR=0;
	LCD_DataPort=DL;
	LCD_WR=1;
	LCD_CS=1;
	
#endif
}

void Write_Data(unsigned char DH,unsigned char DL)
{
#if USR_LCM_IF == 1
	
	LCMIFDATL = DH;
	LCD_CS=0;
	LCMIFCR = 0x85;		//Enable interface, write data out
	while(!LCD_CS);

	LCMIFDATL = DL;
	LCD_CS=0;
	LCMIFCR = 0x85;		//Enable interface, write data out
	while(!LCD_CS);
	
#else
	
	LCD_CS=0;
	LCD_RS=1;
	LCD_WR=0;
	LCD_DataPort=DH;
	LCD_WR=1;
	_nop_();
	LCD_WR=0;
	LCD_DataPort=DL;	
	LCD_WR=1;
	LCD_CS=1;
	
#endif
}

void LCD_WR_REG(u8 Reg)	 
{	
#if USR_LCM_IF == 1
	
	LCMIFDATL = Reg;
	LCD_CS=0;
	LCMIFCR = 0x84;		//Enable interface, write command out
	while(!LCD_CS);
	
#else
	
	LCD_RS=0;
	LCD_CS=0;
	LCD_WR=0;
	LCD_DataPort = Reg;
	LCD_WR=1;
	LCD_CS=1;
	
#endif
}

u16 LCD_RD_DATA(void)
{
	u16 d;
#if USR_LCM_IF == 1
	
	//LCM Read
	LCD_CS = 0;
	LCMIFCR = 0x87;		//Enable interface, Read data
	while(!LCD_CS);
	d = (LCMIFDATL << 8);

	LCD_CS = 0;
	LCMIFCR = 0x87;		//Enable interface, Read data
	while(!LCD_CS);
	d |= LCMIFDATL;
	return (d);
	
#else
	
	LCD_RS=1;
	LCD_CS = 0;
	LCD_RD = 0;
	_nop_();
	_nop_();
	_nop_();
	d = (LCD_DataPort << 8);
	LCD_RD = 1;
	_nop_();
	_nop_();
	_nop_();
	LCD_RD = 0;
	_nop_();
	_nop_();
	_nop_();
	d |= LCD_DataPort;
	LCD_RD = 1;
	LCD_CS = 1;
	return d;
	
#endif
}

void LCD_WR_REG16(u8 Reg, u16 dat)	 
{	
	Write_Cmd(0x00,Reg);
	Write_Data((dat>>8)&0xFF,dat&0xFF);
} 

void LCD_WR_DATA_16Bit(u16 Data)
{
	Write_Data((Data>>8)&0xFF,Data&0xFF);
}

/*****************************************************************************
 * @name       :u16 LCD_Read_ID(void)
 * @date       :2020-12-11 
 * @function   :Read ID
 * @parameters :None
 * @retvalue   :ID value
******************************************************************************/ 
u16 LCD_Read_ID(void)
{
	u16 val;

#if USR_LCM_IF == 1
	
	LCD_WR_REG(0x00);		//ID: Status Read (RS)
	val = LCD_RD_DATA();
	return (val);
	
#else
	
	LCD_WR_REG(0x00);		//ID: Status Read (RS)
	LCD_DataPort = 0xFF; //拉高P0
  //P0口设置成输入口
	P2M0=0x00;
	P2M1=0xFF;
	val = LCD_RD_DATA();
  //P0口设置成推挽输出
	P2M0=0xFF;
	P2M1=0x00;
	LCD_DataPort = 0xFF; //拉高P0

	return (val);
	
#endif
}

/*****************************************************************************
 * @name       :void GPIO_Init(void)
 * @date       :2018-11-13 
 * @function   :Set the gpio to push-pull mode
 * @parameters :None
 * @retvalue   :None
******************************************************************************/	
void GPIO_Init(void)
{
  //P0口设置成推挽输出
//	P0M0=0xff;
//	P0M1=0x00;

	//P1口设置成准双向口
//	P1M0=0x00;
//	P1M1=0x00;

  //P2口设置成推挽输出
	P2M0=0xff;
	P2M1=0x00;

	//P3.4~P3.7口设置成推挽输出
	P3M0=0xf0;
	P3M1=0x00;

	//P4.1口设置成推挽输出
	P4M0=0x02;
	P4M1=0x00;
}

/*****************************************************************************
 * @name       :void LCM_Config(void)
 * @date       :2018-11-13 
 * @function   :Config LCM
 * @parameters :None
 * @retvalue   :None
******************************************************************************/	
void LCM_Config(void)
{
	P_SW2 = 0x80;
	LCMIFCFG = 0x80;	//bit7 1:Enable Interrupt, bit1 0:8bit mode; bit0 0:8080,1:6800
	LCMCFG2 = 0x29;		//RS:P41,RD:P37,WR:P36; Setup Time=2,HOLD Time=1
	LCMIFSTA = 0x00;
}

/*****************************************************************************
 * @name       :void LCDReset(void)
 * @date       :2018-08-09 
 * @function   :Reset LCD screen
 * @parameters :None
 * @retvalue   :None
******************************************************************************/	
void LCDReset(void)
{
	LCD_CS=1;
	delay_ms(50);	
	LCD_RESET=0;
	delay_ms(150);
	LCD_RESET=1;
	delay_ms(50);
}

/*****************************************************************************
 * @name       :void LCD_Init(void)
 * @date       :2018-08-09 
 * @function   :Initialization LCD screen
 * @parameters :None
 * @retvalue   :None
******************************************************************************/	 	 
void LCD_Init(void)
{
	LCDReset(); //初始化之前复位
	delay_ms(150);                     //根据不同晶振速度可以调整延时，保障稳定显示
//*************2.4inch ILI9325初始化**********//	
	LCD_WR_REG16(0x00E5,0x78F0); 
	LCD_WR_REG16(0x0001,0x0100); 
	LCD_WR_REG16(0x0002,0x0700); 
	LCD_WR_REG16(0x0003,0x1030); 
	LCD_WR_REG16(0x0004,0x0000); 
	LCD_WR_REG16(0x0008,0x0202);  
	LCD_WR_REG16(0x0009,0x0000);
	LCD_WR_REG16(0x000A,0x0000); 
	LCD_WR_REG16(0x000C,0x0000); 
	LCD_WR_REG16(0x000D,0x0000);
	LCD_WR_REG16(0x000F,0x0000);
	//power on sequence VGHVGL
	LCD_WR_REG16(0x0010,0x0000);   
	LCD_WR_REG16(0x0011,0x0007);  
	LCD_WR_REG16(0x0012,0x0000);  
	LCD_WR_REG16(0x0013,0x0000); 
	LCD_WR_REG16(0x0007,0x0000); 
	//vgh 
	LCD_WR_REG16(0x0010,0x1690);   
	LCD_WR_REG16(0x0011,0x0227);
	delay_ms(10);
	//vregiout 
	LCD_WR_REG16(0x0012,0x009D); //0x001b
	delay_ms(10); 
	//vom amplitude
	LCD_WR_REG16(0x0013,0x1900);
	delay_ms(10); 
	//vom H
	LCD_WR_REG16(0x0029,0x0025); 
	LCD_WR_REG16(0x002B,0x000D); 
	//gamma
	LCD_WR_REG16(0x0030,0x0007);
	LCD_WR_REG16(0x0031,0x0303);
	LCD_WR_REG16(0x0032,0x0003); //0006
	LCD_WR_REG16(0x0035,0x0206);
	LCD_WR_REG16(0x0036,0x0008);
	LCD_WR_REG16(0x0037,0x0406); 
	LCD_WR_REG16(0x0038,0x0304); //0200
	LCD_WR_REG16(0x0039,0x0007); 
	LCD_WR_REG16(0x003C,0x0602); //0504
	LCD_WR_REG16(0x003D,0x0008); 
	//ram
	LCD_WR_REG16(0x0050,0x0000); 
	LCD_WR_REG16(0x0051,0x00EF);
	LCD_WR_REG16(0x0052,0x0000); 
	LCD_WR_REG16(0x0053,0x013F);  
	LCD_WR_REG16(0x0060,0xA700); 
	LCD_WR_REG16(0x0061,0x0001); 
	LCD_WR_REG16(0x006A,0x0000); 
	//
	LCD_WR_REG16(0x0080,0x0000); 
	LCD_WR_REG16(0x0081,0x0000); 
	LCD_WR_REG16(0x0082,0x0000); 
	LCD_WR_REG16(0x0083,0x0000); 
	LCD_WR_REG16(0x0084,0x0000); 
	LCD_WR_REG16(0x0085,0x0000); 
	//
	LCD_WR_REG16(0x0090,0x0010); 
	LCD_WR_REG16(0x0092,0x0600); 
	
	LCD_WR_REG16(0x0007,0x0133);
	LCD_WR_REG16(0x0000,0x0022);

	//设置LCD属性参数
	#if USE_HORIZONTAL==1
	LCD_W = 320;
	LCD_H = 240;
	LCD_WR_REG16(0x0003, 0x1038); // set GRAM write direction and BGR=1.
	LCD_WR_REG16(0x0001, 0x0000); // set SS and SM bit
	#else
	LCD_W = 240;
	LCD_H = 320;
	LCD_WR_REG16(0x0003, 0x1030); // set GRAM write direction and BGR=1.
	LCD_WR_REG16(0x0001, 0x0100); // set SS and SM bit
	#endif 
}

#define WINDOW_XADDR_START	0x0050 // Horizontal Start Address Set
#define WINDOW_XADDR_END		0x0051 // Horizontal End Address Set
#define WINDOW_YADDR_START	0x0052 // Vertical Start Address Set
#define WINDOW_YADDR_END	0x0053 // Vertical End Address Set
#define GRAM_XADDR		    0x0020 // GRAM Horizontal Address Set
#define GRAM_YADDR		    0x0021 // GRAM Vertical Address Set
#define GRAMWR 			    0x0022 // memory write

void LCD_SetWindows(u16 xStar0, u16 yStar0,u16 xEnd0,u16 yEnd0)
{	
	u16 xStar; u16 yStar;u16 xEnd;u16 yEnd;
	#if USE_HORIZONTAL==1
	xStar = yStar0;
	xEnd = yEnd0;
	yStar = xStar0;
	yEnd = xEnd0;
	#else
	xStar = xStar0;
	xEnd = xEnd0;
	yStar = yStar0;
	yEnd = yEnd0;
	#endif 

  LCD_WR_REG16(WINDOW_XADDR_START,xStar);
  LCD_WR_REG16(WINDOW_XADDR_END,xEnd);
  LCD_WR_REG16(WINDOW_YADDR_START,yStar);
  LCD_WR_REG16(WINDOW_YADDR_END,yEnd);
  LCD_WR_REG16(GRAM_XADDR,xStar);
  LCD_WR_REG16(GRAM_YADDR,yStar);
	LCD_WR_REG(GRAMWR);
}

/*****************************************************************************
 * @name       :void LCD_DrawPoint(u16 x,u16 y)
 * @date       :2018-08-09 
 * @function   :Write a pixel data at a specified location
 * @parameters :x:the x coordinate of the pixel
                y:the y coordinate of the pixel
 * @retvalue   :None
******************************************************************************/	
void LCD_DrawPoint(u16 x,u16 y)
{
	LCD_SetWindows(x,y,x,y);//设置光标位置 
	LCD_WR_DATA_16Bit(POINT_COLOR); 	    
} 	 

/*****************************************************************************
 * @name       :void LCD_ShowChar(u16 x,u16 y,u16 fc, u16 bc, u8 num,u8 size,u8 mode)
 * @date       :2018-08-09 
 * @function   :Display a single English character
 * @parameters :x:the beginning x coordinate of the Character display position
                y:the beginning y coordinate of the Character display position
								fc:the color value of display character
								bc:the background color of display character
								num:the ascii code of display character(0~94)
								size:the size of display character
								mode:0-no overlying,1-overlying
 * @retvalue   :None
******************************************************************************/ 
void LCD_ShowChar(u16 x,u16 y,u16 fc, u16 bc, u8 num,u8 size,u8 mode)
{  
	u8 temp;
	u8 pos,t;
	u16 colortemp=POINT_COLOR;

	num=num-' ';//得到偏移后的值
	LCD_SetWindows(x,y,x+size/2-1,y+size-1);//设置单个文字显示窗口
	if(!mode) //非叠加方式
	{
		for(pos=0;pos<size;pos++)
		{
			if(size==12)temp=asc2_1206[num][pos];//调用1206字体
			else temp=asc2_1608[num][pos];		 //调用1608字体
			for(t=0;t<size/2;t++)
			{
				if(temp&0x01)LCD_WR_DATA_16Bit(fc); 
				else LCD_WR_DATA_16Bit(bc); 
				temp>>=1; 
			}
		}
	}
	else//叠加方式
	{
		for(pos=0;pos<size;pos++)
		{
			if(size==12)temp=asc2_1206[num][pos];//调用1206字体
			else temp=asc2_1608[num][pos];		 //调用1608字体
			for(t=0;t<size/2;t++)
			{
				POINT_COLOR=fc;
				if(temp&0x01)	LCD_DrawPoint(x+t,y+pos);//画一个点
				temp>>=1;
			}
		}
	}
	POINT_COLOR=colortemp;	
	LCD_SetWindows(0,0,LCD_W-1,LCD_H-1);//恢复窗口为全屏    	   	 	  
}

/*****************************************************************************
 * @name       :void Show_Str(u16 x, u16 y, u16 fc, u16 bc, u8 *str,u8 size,u8 mode)
 * @date       :2018-08-09 
 * @function   :Display Chinese and English strings
 * @parameters :x:the beginning x coordinate of the Chinese and English strings
                y:the beginning y coordinate of the Chinese and English strings
								fc:the color value of Chinese and English strings
								bc:the background color of Chinese and English strings
								str:the start address of the Chinese and English strings
								size:the size of Chinese and English strings
								mode:0-no overlying,1-overlying
 * @retvalue   :None
******************************************************************************/	   		   
void Show_Str(u16 x, u16 y, u16 fc, u16 bc, u8 *str,u8 size,u8 mode)
{					
	u16 x0=x;							  	  
	u8 bHz=0;     //字符或者中文 
	while(*str!=0)//数据未结束
	{ 
		if(!bHz)
		{
			if(x>(LCD_W-size/2)||y>(LCD_H-size)) 
			return;
			if(*str>0x80)	bHz=1;//中文 
			else              //字符
			{
				if(*str==0x0D)//换行符号
				{
					y+=size;
					x=x0;
					str++;
				}
				else
				{
					if(size>16)//字库中没有集成12X24 16X32的英文字体,用8X16代替
					{  
						LCD_ShowChar(x,y,fc,bc,*str,16,mode);
						x+=8; //字符,为全字的一半 
					}
					else
					{
						LCD_ShowChar(x,y,fc,bc,*str,size,mode);
						x+=size/2; //字符,为全字的一半 
					}
				}
				str++;
			}
		}
		else//中文
		{
//			if(x>(lcddev.width-size)||y>(lcddev.height-size))
//			return;
//			bHz=0;//有汉字库
//			if(size==32)
//			GUI_DrawFont32(x,y,fc,bc,str,mode);
//			else if(size==24)
//			GUI_DrawFont24(x,y,fc,bc,str,mode);
//			else
//			GUI_DrawFont16(x,y,fc,bc,str,mode);

			str+=2;
			x+=size;//下一个汉字偏移
		}
	}
}

/*****************************************************************************
 * @name       :void LCM_Interrupt(void)
 * @date       :2018-11-13 
 * @function   :None
 * @parameters :None
 * @retvalue   :
******************************************************************************/ 
void LCM_Interrupt(void) interrupt 13
{
	LCMIFSTA = 0x00;
	LCD_CS=1;
}
