/*---------------------------------------------------------------------*/
/* --- Web: www.STCAI.com ---------------------------------------------*/
/*---------------------------------------------------------------------*/

/*************  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 = P4^5;         //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 = P0^5;         //片选
sbit LCD_RESET = P4^7;      //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    "..\..\comm\AI8051U.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;

sbit LCD_RS = P4^5;         //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 = P0^5;         //片选
sbit LCD_RESET = P4^7;      //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)
{
    WTST = 0;  //设置程序指令延时参数，赋值为0可将CPU执行指令的速度设置为最快
    EAXSFR(); //扩展寄存器(XFR)访问使能
    CKCON = 0; //提高访问XRAM速度

    P0M1 = 0x00;   P0M0 = 0x00;   //设置为准双向口
    P1M1 = 0x00;   P1M0 = 0x00;   //设置为准双向口
    P2M1 = 0x00;   P2M0 = 0x00;   //设置为准双向口
    P3M1 = 0x00;   P3M0 = 0x00;   //设置为准双向口
    P4M1 = 0x00;   P4M0 = 0x00;   //设置为准双向口
    P5M1 = 0x00;   P5M0 = 0x00;   //设置为准双向口
    P6M1 = 0x00;   P6M0 = 0x00;   //设置为准双向口
    P7M1 = 0x00;   P7M0 = 0x00;   //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};

    LCD_Fill(0,0,LCD_W,LCD_H,WHITE);
    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);
    LCD_Fill(0,0,LCD_W,LCD_H,RED);
    delay_ms(800);
    LCD_Fill(0,0,LCD_W,LCD_H,GREEN);
    delay_ms(800);
    LCD_Fill(0,0,LCD_W,LCD_H,BLUE);
    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 / 6000;
        while(--i);   //6T 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
    //P2口设置成输入口
    P2M0=0x00;
    P2M1=0xFF;
    val = LCD_RD_DATA();
    //P2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)
{
	//P0.5口设置成推挽输出
	P0M0=0x20;
	P0M1=0x00;

    //P2口设置成准双向口
    P2M0=0x00;
    P2M1=0x00;

    //P3.3口设置成输入口
    //P3.7,P3.6,P3.4,P3.2口设置成推挽输出
    P3M0=0xd4;
    P3M1=0x08;

    //P4.7,P4.5口设置成推挽输出
    P4M0=0xa0;
    P4M1=0x00;

    //P5.3,P5.0口设置成输入口
    //P5.2口设置成推挽输出
    P5M0=0x04;
    P5M1=0x09;
}

/*****************************************************************************
 * @name       :void LCM_Config(void)
 * @date       :2018-11-13 
 * @function   :Config LCM
 * @parameters :None
 * @retvalue   :None
******************************************************************************/	
void LCM_Config(void)
{
    LCMIFCFG = 0x80;	//bit7 1:Enable Interrupt, bit1 0:8bit mode; bit0 0:8080,1:6800
    LCMIFCFG2 = 0x29;	//RS:P45,E:P37,RW: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;
}
