📄 lcd.c

📁 240*320 TFT屏用M16读取SD卡内BMP格式图片.和汉字显示程序(字库也是存在SD卡里
💻 C
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/******************************************
//测试系统
//芯片：ATmega16L
//频率：8MHz内频
//电压：3.3V
*******************************************/

#include"LCD.h"


/***************************************************
//颜色数值
//红色，绿色，蓝色，黄色，黑色，白色，天蓝色，紫色
****************************************************/
uint color[]={0xF800,0x07E0,0x001F,0xFFE0,0x0000,0xFFFF,0x07FF,0xF81F};


/***********************
    1us延时函数
***********************/
void delay_us(uint16 t)
{

  //_delay_us(1) ;
  
  
	uint16 i;
	while(--t)
	{ 
	  i=8;
	  while(i--);
	}
	
  	
}


/**********************
    1ms延时函数
***********************/
void delay_ms(uint16 t)
{
	uint16 i;
	while(--t)
	{
		i=1000;
		while(--i) delay_us(1);
	}
}

/*********************
    I/O口初始化
**********************/
void LCD_IO_Init()
{
  
  DDRA = 0xFF;
  DDRC = 0xFF;

}


/********************************
         写寄存器函数
********************************/
void LCD_WriteRegister(uint8 index)
{

	LCD_RS_L ;
    LCD_CS_H;
	
	PORTA= index;
	LCD_WR_L;
	LCD_WR_H;

}


/***************************
    写8位数据函数
****************************/
void LCD_WriteByte(uint8 data)
{
	LCD_RS_H;
	LCD_CS_H;
	
	DATA= data;
	LCD_WR_L;
	LCD_WR_H ;
}



/***************************************************
//写寄存器数据函数
//输入：type 数据位数: 1为16位，0为8位。
****************************************************/
void LCD_WriteCommand(uint8 type,uint8 index,uint16 val)
{
	LCD_RS_L ;
	LCD_CS_H ;
	DATA= index;
	LCD_WR_L;
	LCD_WR_H ;
	delay_us(1);
	LCD_RS_H;
	if(type)
	{
		DATA= (uint8)(val>>8);
		LCD_WR_L;
		LCD_WR_H ;

	}
	delay_us(1);
	
	DATA= (uint8)val;
	LCD_WR_L;
	LCD_WR_H ;
	
}


/***************************
//写16位数据函数
//输入: val数据
****************************/
void LCD_WriteData(uint16 val)
{
	LCD_RS_H;
	LCD_CS_H;
	
	DATA= (uint8)(val>>8);
	LCD_WR_L;
    LCD_WR_H;

	DATA= (uint8)val;
	LCD_WR_L;
	LCD_WR_H ;

}


/**********************
    LCD初始化函数
***********************/
void LCD_Init()
{   
    LCD_IO_Init();
	LCD_RST_L;
	delay_ms(10);
	LCD_RST_H;
    delay_ms(10);
	
	//initializing funciton 1
    delay_us(10);
	LCD_WriteRegister(0xA1);
	delay_us(16);
	LCD_WriteByte(0x00);
	delay_us(90);
	LCD_WriteRegister(0xA0);
	delay_us(10);
	LCD_WriteByte(0x00);
	delay_us(10);
	LCD_WriteCommand(0,0x70,0xC8);

	delay_ms(10);
	
	LCD_WriteCommand(0,0x72,0xA3);
	delay_us(10);
	LCD_WriteCommand(0,0x73,0x04);
	delay_us(10);
	LCD_WriteCommand(0,0x75,0x45);
	delay_us(10);
	LCD_WriteCommand(0,0x76,0x23);
	delay_us(10);
	LCD_WriteCommand(0,0x77,0x08);
	delay_us(10);
	LCD_WriteCommand(0,0x78,0x08);
	delay_us(10);
	LCD_WriteCommand(0,0x79,0x00);
	delay_us(10);
	LCD_WriteCommand(0,0x7F,0xF0);
	delay_us(10);
	LCD_WriteCommand(0,0x71,0x81);	
	delay_ms(2);

	LCD_WriteCommand(0,0x0D,0x23);
	delay_us(10);
	LCD_WriteCommand(0,0x11,0x00);
	delay_us(10);
	LCD_WriteCommand(0,0x12,0x00);
	delay_us(10);
	LCD_WriteCommand(0,0x21,0x37);
	delay_us(10);
	LCD_WriteCommand(0,0x22,0x02);
	delay_us(10);
	LCD_WriteCommand(0,0x23,0x24);
	delay_us(10);
	delay_us(10);
	LCD_WriteCommand(0,0x24,0x13);
	delay_us(10);
	LCD_WriteCommand(0,0x25,0x0A);
	delay_us(10);
	LCD_WriteCommand(0,0x26,0x82);
	delay_us(10);
	LCD_WriteCommand(0,0x27,0x01);
	delay_us(10);
	LCD_WriteCommand(0,0x1E,0x25);
	delay_us(10);
	LCD_WriteCommand(0,0x1F,0x59);
	delay_us(10);

	//GAMMA设置
	LCD_WriteCommand(1,0x30,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x31,0x0444);
	delay_us(10);
	LCD_WriteCommand(1,0x32,0x0555);
	delay_us(10);
	LCD_WriteCommand(1,0x33,0x0444);
	delay_us(10);
	LCD_WriteCommand(1,0x34,0x0333);
	delay_us(10);
	LCD_WriteCommand(1,0x35,0x0333);
	delay_us(10);
	LCD_WriteCommand(1,0x36,0x0333);
	delay_us(10);
	LCD_WriteCommand(1,0x37,0x0333);
	delay_us(10);
	LCD_WriteCommand(1,0x38,0x0444);
	delay_us(10);
	LCD_WriteCommand(1,0x39,0x0555);
	delay_us(10);
	LCD_WriteCommand(1,0x3A,0x0666);
	delay_us(10);
	LCD_WriteCommand(1,0x3B,0x0666);
	delay_us(10);
	LCD_WriteCommand(1,0x3C,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x3D,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x3E,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x3F,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x40,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x41,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x42,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x43,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x44,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x45,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x46,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x47,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x48,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x49,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x4A,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x4B,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x4C,0x0777);
	delay_us(10);
	LCD_WriteCommand(1,0x4D,0x0666);
	delay_us(10);
	LCD_WriteCommand(1,0x4E,0x0666);
	delay_us(10);
	LCD_WriteCommand(1,0x4F,0x0666);

	delay_us(400);

	LCD_WriteCommand(0,0x00,0x04);	//扫描方向控制
	delay_us(10);
	LCD_WriteCommand(0,0x01,0x07);	
	delay_us(10);
    
	//写区域控制
	LCD_WriteCommand(0,0x02,0x00);	  //X
	LCD_WriteCommand(1,0x03,0x0000);  //Y
	LCD_WriteCommand(0,0x04,0xEF);	  //结束列数(0~239)	
	LCD_WriteCommand(1,0x05,0x013F);  //结束行数(0~319)


	LCD_WriteCommand(0,0x06,0x00);	
	LCD_WriteCommand(1,0x07,0x0000);	
	LCD_WriteCommand(0,0x08,0xEF);	
	LCD_WriteCommand(1,0x09,0x013F);

	delay_us(10);
	LCD_WriteCommand(0,0x0A,0x00);
	delay_us(10);
	LCD_WriteCommand(0,0x0B,0x00);
	delay_us(10);
	LCD_WriteCommand(0,0x0C,0x00);
	delay_us(10);
	LCD_WriteCommand(0,0x14,0x00);
	delay_us(10);
	LCD_WriteCommand(0,0x15,0x00);
	delay_us(10);
	LCD_WriteCommand(0,0x16,0x00);
	delay_us(10);
	LCD_WriteCommand(1,0x17,0x01FF);
	delay_us(10);
	LCD_WriteCommand(1,0x18,0x01FF);
	delay_us(10);	
	LCD_WriteCommand(0,0x13,0x00);
	delay_us(10);
	LCD_WriteCommand(1,0x19,0x01FF);
	delay_us(10);
	LCD_WriteCommand(1,0x1B,0x01FF);
	delay_us(10);
	LCD_WriteCommand(1,0x1C,0x01FF);
	delay_us(10);
	LCD_WriteCommand(1,0x1A,0x01FF);	
	delay_us(10);
	LCD_WriteCommand(0,0x1D,0x0E);
	delay_us(10);
	LCD_WriteCommand(0,0x10,0x06);		//开显示
	         
	delay_us(100);
}


/******************************
//测试程序
//彩色测试
*******************************/
void LCD_test()
{
	uint16 temp;
	uint32 num,num1,num2;
	uint8 n;
	
	LCD_WriteCommand(0,0x02,0x00);	  //X
	LCD_WriteCommand(1,0x03,0x0000);  //Y
	LCD_WriteCommand(0,0x04,0xEF);	  //结束列数(0~239)	
	LCD_WriteCommand(1,0x05,0x013F);  //结束行数(0~319)
	
	
	LCD_WriteRegister(0x0E);
	
    //彩色条纹测试
	for(n=0;n<8;n++)
	 {
	    temp=color[n];
		for(num=40*240;num>0;num--) 
		  LCD_WriteData(temp);
	 }
	delay_ms(1000);
	
	//彩色屏幕测试
	for(n=0;n<8;n++)
	 {  
	    LCD_WriteRegister(0x0E);
	    temp=color[n];
		for(num1=(uint32)240*320;num1>0;num1--)
		  {
		  
		    LCD_WriteData(temp);
		    
		    /*
		    for(num2=320;num2>0;num2--)
			  {
		        LCD_WriteData(temp);
			  }*/
		  }
	    delay_ms(1000);
	 }



}
💿 文件大小 209 K
👤 上传用户 babydog00
📂 所属分类单片机开发
🏷️ 相关标签

#240 #320 #TFT #M16
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