/****************************************************************************************************
//=========================================电源接线================================================//
//     LCD模块                STM32单片机
//      VCC          接        DC5V/3.3V      //电源
//      GND          接          GND          //电源地
//=======================================液晶屏数据线接线==========================================//
//本模块默认数据总线类型为SPI总线
//     LCD模块                STM32单片机    
//       SDA         接          PB15         //液晶屏SPI总线数据写信号
//=======================================液晶屏控制线接线==========================================//
//     LCD模块 					      STM32单片机 
//       SCK         接          PB13         //液晶屏SPI总线时钟信号
//       A0          接          PB10         //液晶屏数据/命令控制信号
//       RESET       接          PB12         //液晶屏复位控制信号
//       CS          接          PB11         //液晶屏片选控制信号
**************************************************************************************************/	
 /* @attention
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, QD electronic SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
**************************************************************************************************/	
#include "lcd.h"
#include "stdlib.h"

#include "spi.h"
#include "main.h"

	   
//管理LCD重要参数
//默认为竖屏
_lcd_dev lcddev;

//画笔颜色,背景颜色
uint16_t POINT_COLOR = 0x0000,BACK_COLOR = 0xFFFF;  
uint16_t DeviceCode;	 

/*****************************************************************************
 * @name       :u8 SPI_WriteByte(x,u8 Byte)
 * @date       :2018-08-09 
 * @function   :Write a byte of data using STM32's hardware SPI
 * @parameters : Byte:Data to be written
******************************************************************************/
uint8_t SPI2_ReadWriteByte( uint8_t TxData)
{
    uint8_t Rxdata;
    HAL_SPI_TransmitReceive(&hspi2,&TxData,&Rxdata,1, 1000);       
 	return Rxdata;		
} 

/*****************************************************************************
 * @name       :void LCD_WR_REG(uint8_t data)
 * @date       :2018-08-09 
 * @function   :Write an 8-bit command to the LCD screen
 * @parameters :data:Command value to be written
 * @retvalue   :None
******************************************************************************/
void LCD_WR_REG(uint8_t data)
{ 
   LCD_CS_CLR;     
	LCD_RS_CLR;	  
	SPI2_ReadWriteByte(data);
   LCD_CS_SET;	
}

/*****************************************************************************
 * @name       :void LCD_WR_DATA(uint8_t data)
 * @date       :2018-08-09 
 * @function   :Write an 8-bit data to the LCD screen
 * @parameters :data:data value to be written
 * @retvalue   :None
******************************************************************************/
void LCD_WR_DATA(uint8_t data)
{
   LCD_CS_CLR;
	 LCD_RS_SET;
	SPI2_ReadWriteByte(data);
   LCD_CS_SET;
}

/*****************************************************************************
 * @name       :void LCD_WriteReg(uint8_t LCD_Reg, uint16_t LCD_RegValue)
 * @date       :2018-08-09 
 * @function   :Write data into registers
 * @parameters :LCD_Reg:Register address
                LCD_RegValue:Data to be written
 * @retvalue   :None
******************************************************************************/
void LCD_WriteReg(uint8_t LCD_Reg, uint16_t LCD_RegValue)
{	
	LCD_WR_REG(LCD_Reg);  
	LCD_WR_DATA(LCD_RegValue);	    		 
}	   

/*****************************************************************************
 * @name       :void LCD_WriteRAM_Prepare(void)
 * @date       :2018-08-09 
 * @function   :Write GRAM
 * @parameters :None
 * @retvalue   :None
******************************************************************************/	 
void LCD_WriteRAM_Prepare(void)
{
	LCD_WR_REG(lcddev.wramcmd);
}	 

/*****************************************************************************
 * @name       :void Lcd_WriteData_16Bit(uint16_t Data)
 * @date       :2018-08-09 
 * @function   :Write an 16-bit command to the LCD screen
 * @parameters :Data:Data to be written
 * @retvalue   :None
******************************************************************************/	 
void Lcd_WriteData_16Bit(uint16_t Data)
{	
   LCD_CS_CLR;
   LCD_RS_SET;  
   //SPI_WriteByte(SPI2,Data>>8);
	SPI2_ReadWriteByte(Data>>8);
	SPI2_ReadWriteByte(Data);
   LCD_CS_SET;
}

/*****************************************************************************
 * @name       :void LCD_DrawPoint(uint16_t x,uint16_t 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(uint16_t x,uint16_t y)
{
	LCD_SetCursor(x,y);//设置光标位置 
	Lcd_WriteData_16Bit(POINT_COLOR); 
}

/*****************************************************************************
 * @name       :void LCD_Clear(uint16_t Color)
 * @date       :2018-08-09 
 * @function   :Full screen filled LCD screen
 * @parameters :color:Filled color
 * @retvalue   :None
******************************************************************************/	
void LCD_Clear(uint16_t Color)
{
  unsigned int i,m;  
	LCD_SetWindows(0,0,lcddev.width-1,lcddev.height-1);   
	LCD_CS_CLR;
	LCD_RS_SET;
	for(i=0;i<lcddev.height;i++)
	{
		for(m=0;m<lcddev.width;m++)
		{	
			Lcd_WriteData_16Bit(Color);
		}
	}
	 LCD_CS_SET;
} 


/*****************************************************************************
 * @name       :void LCD_RESET(void)
 * @date       :2018-08-09 
 * @function   :Reset LCD screen
 * @parameters :None
 * @retvalue   :None
******************************************************************************/	
void LCD_RESET(void)
{
	LCD_RST_CLR;
	HAL_Delay(100);	
	LCD_RST_SET;
	HAL_Delay(50);
}

/*****************************************************************************
 * @name       :void LCD_RESET(void)
 * @date       :2018-08-09 
 * @function   :Initialization LCD screen
 * @parameters :None
 * @retvalue   :None
******************************************************************************/	 	 
void LCD_Init(void)
{  								 
 	LCD_RESET(); //LCD 复位	
//************* ST7735S初始化**********//	
	LCD_WR_REG(0x11);//Sleep exit 
	HAL_Delay (120);	
	
	//ST7735R Frame Rate
	LCD_WR_REG(0xB1); 
	LCD_WR_DATA(0x01); 
	LCD_WR_DATA(0x2C); 
	LCD_WR_DATA(0x2D); 
	
	LCD_WR_REG(0xB2); 
	LCD_WR_DATA(0x01); 
	LCD_WR_DATA(0x2C); 
	LCD_WR_DATA(0x2D); 
	
	LCD_WR_REG(0xB3); 
	LCD_WR_DATA(0x01); 
	LCD_WR_DATA(0x2C); 
	LCD_WR_DATA(0x2D); 
	LCD_WR_DATA(0x01); 
	LCD_WR_DATA(0x2C); 
	LCD_WR_DATA(0x2D); 
	
	LCD_WR_REG(0xB4); //Column inversion 
	LCD_WR_DATA(0x07); 	
	//ST7735R Power Sequence
	LCD_WR_REG(0xC0); 
	LCD_WR_DATA(0xA2); 
	LCD_WR_DATA(0x02); 
	LCD_WR_DATA(0x84); 
	
	LCD_WR_REG(0xC1); 
	LCD_WR_DATA(0xC5);
	
	LCD_WR_REG(0xC2); 
	LCD_WR_DATA(0x0A); 
	LCD_WR_DATA(0x00); 
	
	LCD_WR_REG(0xC3); 
	LCD_WR_DATA(0x8A); 
	LCD_WR_DATA(0x2A);
	
	LCD_WR_REG(0xC4); 
	LCD_WR_DATA(0x8A); 
	LCD_WR_DATA(0xEE); 
	
	LCD_WR_REG(0xC5); //VCOM 
	LCD_WR_DATA(0x0E); 	
	
	LCD_WR_REG(0x36); //MX, MY, RGB mode 
	LCD_WR_DATA(0xC0); 
	
	//ST7735R Gamma Sequence
	LCD_WR_REG(0xe0); 
	LCD_WR_DATA(0x0f); 
	LCD_WR_DATA(0x1a); 
	LCD_WR_DATA(0x0f); 
	LCD_WR_DATA(0x18); 
	LCD_WR_DATA(0x2f); 
	LCD_WR_DATA(0x28); 
	LCD_WR_DATA(0x20); 
	LCD_WR_DATA(0x22); 
	LCD_WR_DATA(0x1f); 
	LCD_WR_DATA(0x1b); 
	LCD_WR_DATA(0x23); 
	LCD_WR_DATA(0x37); 
	LCD_WR_DATA(0x00); 	
	LCD_WR_DATA(0x07); 
	LCD_WR_DATA(0x02); 
	LCD_WR_DATA(0x10);
	
	LCD_WR_REG(0xe1); 
	LCD_WR_DATA(0x0f); 
	LCD_WR_DATA(0x1b); 
	LCD_WR_DATA(0x0f); 
	LCD_WR_DATA(0x17); 
	LCD_WR_DATA(0x33); 
	LCD_WR_DATA(0x2c); 
	LCD_WR_DATA(0x29); 
	LCD_WR_DATA(0x2e); 
	LCD_WR_DATA(0x30); 
	LCD_WR_DATA(0x30); 
	LCD_WR_DATA(0x39); 
	LCD_WR_DATA(0x3f); 
	LCD_WR_DATA(0x00); 
	LCD_WR_DATA(0x07); 
	LCD_WR_DATA(0x03); 
	LCD_WR_DATA(0x10); 
 	
	LCD_WR_REG(0x2a);
	LCD_WR_DATA(0x00);
	LCD_WR_DATA(0x00);
	LCD_WR_DATA(0x00);
	LCD_WR_DATA(0x7f);
	LCD_WR_REG(0x2b);
	LCD_WR_DATA(0x00);
	LCD_WR_DATA(0x00);
	LCD_WR_DATA(0x00);
	LCD_WR_DATA(0x9f);
	
	LCD_WR_REG(0xF0); //Enable test command  
	LCD_WR_DATA(0x01); 
	
	LCD_WR_REG(0xF6); //Disable ram power save mode 
	LCD_WR_DATA(0x00); 	
	
	LCD_WR_REG(0x3A); //65k mode 
	LCD_WR_DATA(0x05); 
	
	LCD_WR_REG(0x29);//Display on	
 	
	LCD_direction(USE_HORIZONTAL);//设置LCD显示方向	 
	LCD_Clear(WHITE);//清全屏白色
}
 
/*****************************************************************************
 * @name       :void LCD_SetWindows(uint16_t xStar, uint16_t yStar,uint16_t xEnd,uint16_t yEnd)
 * @date       :2018-08-09 
 * @function   :Setting LCD display window
 * @parameters :xStar:the bebinning x coordinate of the LCD display window
								yStar:the bebinning y coordinate of the LCD display window
								xEnd:the endning x coordinate of the LCD display window
								yEnd:the endning y coordinate of the LCD display window
 * @retvalue   :None
******************************************************************************/ 
void LCD_SetWindows(uint16_t xStar, uint16_t yStar,uint16_t xEnd,uint16_t yEnd)
{	
	LCD_WR_REG(lcddev.setxcmd);	//LCD_WR_REG(0x2a);//列地址设置
	LCD_WR_DATA(0x00);
	LCD_WR_DATA(xStar);		
	LCD_WR_DATA(0x00);
	LCD_WR_DATA(xEnd);

	LCD_WR_REG(lcddev.setycmd);	//LCD_WR_REG(0x2b);//行地址设置
	LCD_WR_DATA(0x00);
	LCD_WR_DATA(yStar);		
	LCD_WR_DATA(0x00);
	LCD_WR_DATA(yEnd);

	LCD_WriteRAM_Prepare(); 	//开始写入GRAM			
}   

/*****************************************************************************
 * @name       :void LCD_SetCursor(uint16_t Xpos, uint16_t Ypos)
 * @date       :2018-08-09 
 * @function   :Set coordinate value
 * @parameters :Xpos:the  x coordinate of the pixel
								Ypos:the  y coordinate of the pixel
 * @retvalue   :None
******************************************************************************/ 
void LCD_SetCursor(uint16_t Xpos, uint16_t Ypos)
{	  	    			
	LCD_SetWindows(Xpos,Ypos,Xpos,Ypos);	
} 

/*****************************************************************************
 * @name       :void LCD_direction(uint8_t direction)
 * @date       :2018-08-09 
 * @function   :Setting the display direction of LCD screen
 * @parameters :direction:		0-0 degree
								1-90 degree
								2-180 degree
								3-270 degree
 * @retvalue   :None
******************************************************************************/ 
void LCD_direction(uint8_t direction)
{ 
	lcddev.setxcmd=0x2A;
	lcddev.setycmd=0x2B;
	lcddev.wramcmd=0x2C;
	switch(direction)
	{		  
		case 0:						 	 		
			lcddev.width=LCD_W;
			lcddev.height=LCD_H;		
			LCD_WriteReg(0x36,(0<<3)|(1<<6)|(1<<7));//BGR==1,MY==0,MX==0,MV==0
		break;
		case 1:
			lcddev.width=LCD_H;
			lcddev.height=LCD_W;
			LCD_WriteReg(0x36,(0<<3)|(1<<7)|(1<<5));//BGR==1,MY==1,MX==0,MV==1
		break;
		case 2:						 	 		
			lcddev.width=LCD_W;
			lcddev.height=LCD_H;	
			LCD_WriteReg(0x36,(0<<3)|(0<<6)|(0<<7));//BGR==1,MY==0,MX==0,MV==0
		break;
		case 3:
			lcddev.width= LCD_H;
			lcddev.height=LCD_W;
			LCD_WriteReg(0x36,(0<<3)|(0<<7)|(1<<6)|(1<<5));//BGR==1,MY==1,MX==0,MV==1
		break;	
		default:break;
	}		
}