/****************************************Copyright (c)**************************************************                         
 * File Name:			ST7735S.c 
 * Function Describe:   LCD Driver of ST7735S 
 * Explain:  
 * Writer:				ShiLiangWen
 * Date:				2016-1-8
********************************************************************************************************/
//-------------------------------------------------------
#include "includes.h"  
//-------------------------------------------------------
#define LCD_CS_PIN      GPIO_Pin_12
#define LCD_CS_PORT     GPIOB
#define LCD_CS_HIGH     LCD_CS_PORT->BSRR = LCD_CS_PIN
#define LCD_CS_LOW      LCD_CS_PORT->BRR =  LCD_CS_PIN

#define LCD_SCK_PIN     GPIO_Pin_13
#define LCD_SCK_PORT    GPIOB
#define LCD_SCK_HIGH    LCD_SCK_PORT->BSRR = LCD_SCK_PIN
#define LCD_SCK_LOW     LCD_SCK_PORT->BRR =  LCD_SCK_PIN

#define LCD_DCX_PIN     GPIO_Pin_14
#define LCD_DCX_PORT    GPIOB
#define LCD_DCX_HIGH    LCD_DCX_PORT->BSRR = LCD_DCX_PIN
#define LCD_DCX_LOW LCD_DCX_PORT->BRR =  LCD_DCX_PIN

#define LCD_SDA_PIN     GPIO_Pin_15
#define LCD_SDA_PORT    GPIOB
#define LCD_SDA_HIGH    LCD_SDA_PORT->BSRR = LCD_SDA_PIN
#define LCD_SDA_LOW     LCD_SDA_PORT->BRR =  LCD_SDA_PIN

#define LCD_RESET_PIN   GPIO_Pin_6
#define LCD_RESET_PORT  GPIOC
#define LCD_RESET_HIGH	LCD_RESET_PORT->BSRR = LCD_RESET_PIN
#define LCD_RESET_LOW   LCD_RESET_PORT->BRR =  LCD_RESET_PIN

#define LCD_BL_PIN      GPIO_Pin_7
#define LCD_BL_PORT     GPIOC
#define LCD_BL_HIGH     LCD_BL_PORT->BSRR = LCD_BL_PIN
#define LCD_BL_LOW      LCD_BL_PORT->BRR =  LCD_BL_PIN


/*******************************************************************************
 ST7735PortInit
*******************************************************************************/
static void ST7735PortInit(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	
	/* Enable GPIOD and GPIOE clocks */
	RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC, ENABLE);  
    
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;             
    LCD_CS_HIGH;
	LCD_BL_HIGH;
	GPIO_InitStructure.GPIO_Pin = (LCD_CS_PIN|LCD_SCK_PIN|LCD_DCX_PIN|LCD_SDA_PIN);
	GPIO_Init(GPIOB, &GPIO_InitStructure);
	LCD_CS_HIGH;
	LCD_SCK_HIGH;
	LCD_SDA_HIGH;
	LCD_DCX_HIGH;
	LCD_RESET_HIGH;
	LCD_BL_HIGH;
	GPIO_InitStructure.GPIO_Pin = (LCD_RESET_PIN|LCD_BL_PIN);
	GPIO_Init(GPIOC, &GPIO_InitStructure);
    LCD_RESET_HIGH;
	LCD_BL_HIGH;
}
/*******************************************************************************
 ST7735SendCmd
*******************************************************************************/
void ST7735SendCmd(unsigned char Cmd)
{
	unsigned char i,j;
	LCD_CS_LOW;
	LCD_DCX_LOW;
	for(i=0;i<8;i++){
		j=0x80>>i;
		LCD_SCK_LOW;
		if(Cmd&j)LCD_SDA_HIGH;
		else LCD_SDA_LOW;
		LCD_SCK_HIGH;
	}
	LCD_CS_HIGH;
}
/*******************************************************************************
 ST7735SendData
*******************************************************************************/
void ST7735SendData(unsigned char Data)
{
	unsigned char i,j;
	LCD_CS_LOW;
	LCD_DCX_HIGH;
	for(i=0;i<8;i++){
		j=0x80>>i;
		LCD_SCK_LOW;
		if(Data & j)LCD_SDA_HIGH;
		else LCD_SDA_LOW;
		LCD_SCK_HIGH;
	}
	LCD_CS_HIGH;
}



void ST7735Init(void)
{
	LcdPortInit();
	//reset
	LCD_RESET_HIGH;
	DelayMs(1);
	LCD_RESET_LOW;
	DelayMs(1);
	LCD_RESET_HIGH;
	DelayMs(120);

	//-----------------------------------ST7735S Set REG---------------------------------------------//
	ST7735SendCmd(0x11); //Sleep out
	DelayMs(120); //Delay 120ms
	//------------------------------------ST7735S Frame Rate-----------------------------------------//
	ST7735SendCmd(0xB1);
	ST7735SendData(0x05);
	ST7735SendData(0x3C);
	ST7735SendData(0x3C);
	ST7735SendCmd(0xB2);
	ST7735SendData(0x05);
	ST7735SendData(0x3C);
	ST7735SendData(0x3C);
	ST7735SendCmd(0xB3);
	ST7735SendData(0x05);
	ST7735SendData(0x3C);
	ST7735SendData(0x3C);
	ST7735SendData(0x05);
	ST7735SendData(0x3C);
	ST7735SendData(0x3C);
	//------------------------------------End ST7735S Frame Rate-----------------------------------------//
	ST7735SendCmd(0xB4); //Dot inversion
	ST7735SendData(0x03);
	//------------------------------------ST7735S Power Sequence-----------------------------------------//
	ST7735SendCmd(0xC0);
	ST7735SendData(0x28);
	ST7735SendData(0x08);
	ST7735SendData(0x04);
	ST7735SendCmd(0xC1);
	ST7735SendData(0XC0);
	ST7735SendCmd(0xC2);
	ST7735SendData(0x0D);
	ST7735SendData(0x00);
	ST7735SendCmd(0xC3);
	ST7735SendData(0x8D);
	ST7735SendData(0x2A);
	ST7735SendCmd(0xC4);
	ST7735SendData(0x8D);
	ST7735SendData(0xEE);
	//---------------------------------End ST7735S Power Sequence-------------------------------------//
	ST7735SendCmd(0xC5); //VCOM
	ST7735SendData(0x1A);
	ST7735SendCmd(0x36); //MX, MY, RGB mode
	ST7735SendData(0x60);//-----------这个值非常重要，决定了内部显存和显示区域的关系，以及RGB颜色顺序
	//------------------------------------ST7735S Gamma Sequence-----------------------------------------//
	ST7735SendCmd(0xE0);
	ST7735SendData(0x04);
	ST7735SendData(0x22);
	ST7735SendData(0x07);
	ST7735SendData(0x0A);
	ST7735SendData(0x2E);
	ST7735SendData(0x30);
	ST7735SendData(0x25);
	ST7735SendData(0x2A);
	ST7735SendData(0x28);
	ST7735SendData(0x26);
	ST7735SendData(0x2E);
	ST7735SendData(0x3A);
	ST7735SendData(0x00);
	ST7735SendData(0x01);
	ST7735SendData(0x03);
	ST7735SendData(0x13);
	ST7735SendCmd(0xE1);
	ST7735SendData(0x04);
	ST7735SendData(0x16);
	ST7735SendData(0x06);
	ST7735SendData(0x0D);
	ST7735SendData(0x2D);
	ST7735SendData(0x26);
	ST7735SendData(0x23);
	ST7735SendData(0x27);
	ST7735SendData(0x27);
	ST7735SendData(0x25);
	ST7735SendData(0x2D);
	ST7735SendData(0x3B);
	ST7735SendData(0x00);
	ST7735SendData(0x01);
	ST7735SendData(0x04);
	ST7735SendData(0x13);
	//------------------------------------End ST7735S Gamma Sequence-----------------------------------------//
	ST7735SendCmd(0x3A); //65k mode
	ST7735SendData(0x05);
	ST7735SendCmd(0x29); //Display on

}

/**********************************************************************************************
设置一个写地址区域
************************************************************************************************/
void SetBlockWrite(u16 x1,u16 y1,u16 x2,u16 y2) 
{
	u16 Xstart,Xend,Ystart,Yend;
	Xstart=x1+1;
	Xend=x2+1;
	Ystart=y1+2;
	Yend=y2+2;
	
	ST7735SendCmd(0x2a);   
	ST7735SendData(Xstart>>8);
	ST7735SendData(Xstart&0xff);
	ST7735SendData(Xend>>8);
	ST7735SendData(Xend&0xff);

	ST7735SendCmd(0x2b);   
	ST7735SendData(Ystart>>8);
	ST7735SendData(Ystart&0xff);
	ST7735SendData(Yend>>8);
	ST7735SendData(Yend&0xff);

	ST7735SendCmd(0x2c);
}
/****************************************************************************
* 名    称：void SetPoint(u16 x,u16 y,u16 color)
* 功    能：指定坐标点
* 入口参数：x轴y轴
* 出口参数：无
* 说    明：2012.4.27 hxm  v1.0
* 调用方法：无 
****************************************************************************/ 					  
void SetPoint(u16 x,u16 y,u16 color)
{
	ST7735SendCmd(0x2a);
	ST7735SendData(x>>8);
	ST7735SendData(x&0x00ff);
   
	st7735_CMD(0x2b);
	ST7735SendData(y>>8);
	ST7735SendData(y&0x00ff);
	
	st7735_CMD(0X2C);
	st7735_DATA(color>>8);
	st7735_DATA(color&0x00ff);
}
/*********************************************************************************************************
      END FILE
*********************************************************************************************************/