#include "lcd.h"
#include <SPI.h>

SPIClass * vspi = NULL;

/******************************************************************************
      函数说明：LCD串行数据写入函数
      入口数据：dat  要写入的串行数据
      返回值：  无
******************************************************************************/
void LCD_Writ_Bus(uint8_t dat) 
{ 
  /*
  uint8_t i;  
  digitalWrite(LCD_CS,0);
  for(i=0;i<8;i++)
  {       
    digitalWrite(LCD_SCL,0);
    if(dat&0x80)
       digitalWrite(LCD_SDA,1);
    else 
       digitalWrite(LCD_SDA,0);
    digitalWrite(LCD_SCL,1);
    dat<<=1;   
  } 
  digitalWrite(LCD_CS,1);
*/
  vspi->transfer(dat);
}

/******************************************************************************
      函数说明：LCD写入数据
      入口数据：dat 写入的数据
      返回值：  无
******************************************************************************/
void LCD_WR_DATA8(uint8_t dat)
{
 
  LCD_Writ_Bus(dat);
}


/******************************************************************************
      函数说明：LCD写入数据
      入口数据：dat 写入的数据
      返回值：  无
******************************************************************************/
void LCD_WR_DATA(uint16_t dat)
{
  
  //LCD_Writ_Bus(dat>>8);
  vspi->transfer16(dat);

}


/******************************************************************************
      函数说明：LCD写入命令
      入口数据：dat 写入的命令
      返回值：  无
******************************************************************************/
void LCD_WR_REG(uint8_t dat)
{
  digitalWrite(LCD_DS,0);//写命令
  LCD_Writ_Bus(dat);
  digitalWrite(LCD_DS,1);//写数据
}

/******************************************************************************
      函数说明：设置起始和结束地址
      入口数据：x1,x2 设置列的起始和结束地址
                y1,y2 设置行的起始和结束地址
      返回值：  无
******************************************************************************/
void LCD_Address_Set(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2)
{

#if USE_HORIZONTAL==0
    LCD_WR_REG(0x2a);//列地址设置
    LCD_WR_DATA(x1);
    LCD_WR_DATA(x2);
    LCD_WR_REG(0x2b);//行地址设置
    LCD_WR_DATA(y1);
    LCD_WR_DATA(y2);
    LCD_WR_REG(0x2c);//储存器写
    #elif USE_HORIZONTAL==1
    LCD_WR_REG(0x2a);//列地址设置
    LCD_WR_DATA(x1);
    LCD_WR_DATA(x2);
    LCD_WR_REG(0x2b);//行地址设置
    LCD_WR_DATA(y1+80);
    LCD_WR_DATA(y2+80);
    LCD_WR_REG(0x2c);//储存器写
    #elif USE_HORIZONTAL==2
    LCD_WR_REG(0x2a);//列地址设置
    LCD_WR_DATA(x1);
    LCD_WR_DATA(x2);
    LCD_WR_REG(0x2b);//行地址设置
    LCD_WR_DATA(y1);
    LCD_WR_DATA(y2);
    LCD_WR_REG(0x2c);//储存器写
    #elif USE_HORIZONTAL==3
    LCD_WR_REG(0x2a);//列地址设置
    LCD_WR_DATA(x1+80);
    LCD_WR_DATA(x2+80);
    LCD_WR_REG(0x2b);//行地址设置
    LCD_WR_DATA(y1);
    LCD_WR_DATA(y2);
    LCD_WR_REG(0x2c);//储存器写

#endif


}


/******************************************************************************
      函数说明：LCD初始化函数
      入口数据：无
      返回值：  无
******************************************************************************/
void Lcd_Init(void)
{

//************* Start Initial Sequence **********//
//delay(120); 
//LCD_WR_REG(0x01);
//上电后硬件会自己复位
delay(220);
LCD_WR_REG(0x36);
if(USE_HORIZONTAL==0)LCD_WR_DATA8(0x00);
else if(USE_HORIZONTAL==1)LCD_WR_DATA8(0xC0);
else if(USE_HORIZONTAL==2)LCD_WR_DATA8(0x70);
else LCD_WR_DATA8(0xA0);

LCD_WR_REG(0x3A); 
LCD_WR_DATA8(0x05);

LCD_WR_REG(0xB2);
LCD_WR_DATA8(0x0C);
LCD_WR_DATA8(0x0C);
LCD_WR_DATA8(0x00);
LCD_WR_DATA8(0x33);
LCD_WR_DATA8(0x33); 

LCD_WR_REG(0xB7); 
LCD_WR_DATA8(0x35);  

LCD_WR_REG(0xBB);
LCD_WR_DATA8(0x19);

LCD_WR_REG(0xC0);
LCD_WR_DATA8(0x2C);

LCD_WR_REG(0xC2);
LCD_WR_DATA8(0x01);

LCD_WR_REG(0xC3);
LCD_WR_DATA8(0x12);   

LCD_WR_REG(0xC4);
LCD_WR_DATA8(0x20);  

LCD_WR_REG(0xC6); 
LCD_WR_DATA8(0x0F);    

LCD_WR_REG(0xD0); 
LCD_WR_DATA8(0xA4);
LCD_WR_DATA8(0xA1);

LCD_WR_REG(0xE0);
LCD_WR_DATA8(0xD0);
LCD_WR_DATA8(0x04);
LCD_WR_DATA8(0x0D);
LCD_WR_DATA8(0x11);
LCD_WR_DATA8(0x13);
LCD_WR_DATA8(0x2B);
LCD_WR_DATA8(0x3F);
LCD_WR_DATA8(0x54);
LCD_WR_DATA8(0x4C);
LCD_WR_DATA8(0x18);
LCD_WR_DATA8(0x0D);
LCD_WR_DATA8(0x0B);
LCD_WR_DATA8(0x1F);
LCD_WR_DATA8(0x23);

LCD_WR_REG(0xE1);
LCD_WR_DATA8(0xD0);
LCD_WR_DATA8(0x04);
LCD_WR_DATA8(0x0C);
LCD_WR_DATA8(0x11);
LCD_WR_DATA8(0x13);
LCD_WR_DATA8(0x2C);
LCD_WR_DATA8(0x3F);
LCD_WR_DATA8(0x44);
LCD_WR_DATA8(0x51);
LCD_WR_DATA8(0x2F);
LCD_WR_DATA8(0x1F);
LCD_WR_DATA8(0x1F);
LCD_WR_DATA8(0x20);
LCD_WR_DATA8(0x23);

LCD_WR_REG(0x21); 

LCD_WR_REG(0x11); 
delay(120); 

LCD_WR_REG(0x29); 
} 


/******************************************************************************
      函数说明：LCD清屏函数
      入口数据：无
      返回值：  无
******************************************************************************/
void LCD_Clear(uint16_t Color)
{
  uint16_t i,j;   
  LCD_Address_Set(0,0,LCD_W-1,LCD_H-1);
    for(i=0;i<LCD_W;i++)
   {
    for (j=0;j<LCD_H;j++)
      {
          LCD_WR_DATA(Color);        
      }

    }
}

void LCD_Clear_Rand()
{
  uint16_t i,j;   
  LCD_Address_Set(0,0,LCD_W-1,LCD_H-1);
    for(i=0;i<LCD_W;i++)
   {
    for (j=0;j<LCD_H;j++)
      {
          LCD_WR_DATA(rand());         
      }

    }
}

unsigned int rgb555torgb565(unsigned int c)
{
    c=c&0x7fff;
    unsigned int r=c>>10;
    c=c&0x03ff;
    unsigned int g=c>>5;
    c=c&0x001f;
    unsigned int b=c;

    unsigned int output=0;

    g=g*2;
    output= (r<<11)|(g<<5)|(b);
    return output;

}

void lcd_init()
{

 pinMode(LCD_SDA, OUTPUT);
  pinMode(LCD_SCL, OUTPUT);
  pinMode(LCD_CS, OUTPUT);
  pinMode(LCD_DS, OUTPUT);

  
  
  digitalWrite(LCD_SDA,0);
  digitalWrite(LCD_SCL,0);
  digitalWrite(LCD_CS,0);
  digitalWrite(LCD_DS,0);
  
  vspi = new SPIClass(VSPI);
  vspi->begin(VSPI_SCLK, VSPI_MISO, VSPI_MOSI, VSPI_SS);
  vspi->beginTransaction(SPISettings(spiClk, MSBFIRST, SPI_MODE0));
  pinMode(vspi->pinSS(), OUTPUT); //HSPI SS
  
  
  digitalWrite(vspi->pinSS(), LOW); //pull SS slow to prep other end for transfer

  pinMode(LCD_LED, OUTPUT);
  digitalWrite(LCD_LED,1);

  Lcd_Init();
}