IT8951.c

#include "IT8951.h"

//Global varivale
IT8951DevInfo gstI80DevInfo;
uint8_t* gpFrameBuf; //Host Source Frame buffer
uint32_t gulImgBufAddr; //IT8951 Image buffer address

//-----------------------------------------------------------
//Host controller function 1---Wait for host data Bus Ready
//-----------------------------------------------------------
void LCDWaitForReady()
{
	uint8_t ulData = bcm2835_gpio_lev(HRDY);
	while(ulData == 0)
	{
		ulData = bcm2835_gpio_lev(HRDY);
	}
}

//-----------------------------------------------------------
//Host controller function 2---Write command code to host data Bus
//-----------------------------------------------------------
void LCDWriteCmdCode(uint16_t usCmdCode)
{
	//Set Preamble for Write Command
	uint16_t wPreamble = 0x6000; 
	
	LCDWaitForReady();	

	bcm2835_gpio_write(CS,LOW);
	
	bcm2835_spi_transfer(wPreamble>>8);
	bcm2835_spi_transfer(wPreamble);
	
	LCDWaitForReady();	
	
	bcm2835_spi_transfer(usCmdCode>>8);
	bcm2835_spi_transfer(usCmdCode);
	
	bcm2835_gpio_write(CS,HIGH); 
}

//-----------------------------------------------------------
//Host controller function 3---Write Data to host data Bus
//-----------------------------------------------------------
void LCDWriteData(uint16_t usData)
{
	//Set Preamble for Write Data
	uint16_t wPreamble	= 0x0000;

	LCDWaitForReady();

	bcm2835_gpio_write(CS,LOW);

	bcm2835_spi_transfer(wPreamble>>8);
	bcm2835_spi_transfer(wPreamble);
	
	LCDWaitForReady();
			
	bcm2835_spi_transfer(usData>>8);
	bcm2835_spi_transfer(usData);
	
	bcm2835_gpio_write(CS,HIGH); 
}

void LCDWriteNData(uint16_t* pwBuf, uint32_t ulSizeWordCnt)
{
	uint32_t i;

	uint16_t wPreamble	= 0x0000;

	LCDWaitForReady();

	bcm2835_gpio_write(CS,LOW);
	
	bcm2835_spi_transfer(wPreamble>>8);
	bcm2835_spi_transfer(wPreamble);
	
	LCDWaitForReady();

	for(i=0;i<ulSizeWordCnt;i++)
	{
		bcm2835_spi_transfer(pwBuf[i]>>8);
		bcm2835_spi_transfer(pwBuf[i]);
	}
	
	bcm2835_gpio_write(CS,HIGH); 
}  

//-----------------------------------------------------------
//Host controller function 4---Read Data from host data Bus
//-----------------------------------------------------------
uint16_t LCDReadData()
{
	uint16_t wRData; 
	
	uint16_t wPreamble = 0x1000;

	LCDWaitForReady();

	bcm2835_gpio_write(CS,LOW);
		
	bcm2835_spi_transfer(wPreamble>>8);
	bcm2835_spi_transfer(wPreamble);

	LCDWaitForReady();
	
	wRData=bcm2835_spi_transfer(0x00);//dummy
	wRData=bcm2835_spi_transfer(0x00);//dummy
	
	LCDWaitForReady();
	
	wRData = bcm2835_spi_transfer(0x00)<<8;
	wRData |= bcm2835_spi_transfer(0x00);
		
	bcm2835_gpio_write(CS,HIGH); 
		
	return wRData;
}

//-----------------------------------------------------------
//  Read Burst N words Data
//-----------------------------------------------------------
void LCDReadNData(uint16_t* pwBuf, uint32_t ulSizeWordCnt)
{
	uint32_t i;
	
	uint16_t wPreamble = 0x1000;

	LCDWaitForReady();
	
	bcm2835_gpio_write(CS,LOW);

	bcm2835_spi_transfer(wPreamble>>8);
	bcm2835_spi_transfer(wPreamble);
	
	LCDWaitForReady();
	
	pwBuf[0]=bcm2835_spi_transfer(0x00);//dummy
	pwBuf[0]=bcm2835_spi_transfer(0x00);//dummy
	
	LCDWaitForReady();
	
	for(i=0;i<ulSizeWordCnt;i++)
	{
		pwBuf[i] = bcm2835_spi_transfer(0x00)<<8;
		pwBuf[i] |= bcm2835_spi_transfer(0x00);
	}
	
	bcm2835_gpio_write(CS,HIGH); 
}

//-----------------------------------------------------------
//Host controller function 5---Write command to host data Bus with aruments
//-----------------------------------------------------------
void LCDSendCmdArg(uint16_t usCmdCode,uint16_t* pArg, uint16_t usNumArg)
{
     uint16_t i;
     //Send Cmd code
     LCDWriteCmdCode(usCmdCode);
     //Send Data
     for(i=0;i<usNumArg;i++)
     {
         LCDWriteData(pArg[i]);
     }
}

//-----------------------------------------------------------
//Host Cmd 1---SYS_RUN
//-----------------------------------------------------------
void IT8951SystemRun()
{
    LCDWriteCmdCode(IT8951_TCON_SYS_RUN);
}

//-----------------------------------------------------------
//Host Cmd 2---STANDBY
//-----------------------------------------------------------
void IT8951StandBy()
{
    LCDWriteCmdCode(IT8951_TCON_STANDBY);
}

//-----------------------------------------------------------
//Host Cmd 3---SLEEP
//-----------------------------------------------------------
void IT8951Sleep()
{
    LCDWriteCmdCode(IT8951_TCON_SLEEP);
}

//-----------------------------------------------------------
//Host Cmd 4---REG_RD
//-----------------------------------------------------------
uint16_t IT8951ReadReg(uint16_t usRegAddr)
{
	uint16_t usData;
	
	//Send Cmd and Register Address
	LCDWriteCmdCode(IT8951_TCON_REG_RD);
	LCDWriteData(usRegAddr);
	//Read data from Host Data bus
	usData = LCDReadData();
	return usData;
}
//-----------------------------------------------------------
//Host Cmd 5---REG_WR
//-----------------------------------------------------------
void IT8951WriteReg(uint16_t usRegAddr,uint16_t usValue)
{
	//Send Cmd , Register Address and Write Value
	LCDWriteCmdCode(IT8951_TCON_REG_WR);
	LCDWriteData(usRegAddr);
	LCDWriteData(usValue);
}

//-----------------------------------------------------------
//Host Cmd 6---MEM_BST_RD_T
//-----------------------------------------------------------
void IT8951MemBurstReadTrigger(uint32_t ulMemAddr , uint32_t ulReadSize)
{
    uint16_t usArg[4];
    //Setting Arguments for Memory Burst Read
    usArg[0] = (uint16_t)(ulMemAddr & 0x0000FFFF); //addr[15:0]
    usArg[1] = (uint16_t)( (ulMemAddr >> 16) & 0x0000FFFF ); //addr[25:16]
    usArg[2] = (uint16_t)(ulReadSize & 0x0000FFFF); //Cnt[15:0]
    usArg[3] = (uint16_t)( (ulReadSize >> 16) & 0x0000FFFF ); //Cnt[25:16]
    //Send Cmd and Arg
    LCDSendCmdArg(IT8951_TCON_MEM_BST_RD_T , usArg , 4);
}
//-----------------------------------------------------------
//Host Cmd 7---MEM_BST_RD_S
//-----------------------------------------------------------
void IT8951MemBurstReadStart()
{
    LCDWriteCmdCode(IT8951_TCON_MEM_BST_RD_S);
}
//-----------------------------------------------------------
//Host Cmd 8---MEM_BST_WR
//-----------------------------------------------------------
void IT8951MemBurstWrite(uint32_t ulMemAddr , uint32_t ulWriteSize)
{
    uint16_t usArg[4];
    //Setting Arguments for Memory Burst Write
    usArg[0] = (uint16_t)(ulMemAddr & 0x0000FFFF); //addr[15:0]
    usArg[1] = (uint16_t)( (ulMemAddr >> 16) & 0x0000FFFF ); //addr[25:16]
    usArg[2] = (uint16_t)(ulWriteSize & 0x0000FFFF); //Cnt[15:0]
    usArg[3] = (uint16_t)( (ulWriteSize >> 16) & 0x0000FFFF ); //Cnt[25:16]
    //Send Cmd and Arg
    LCDSendCmdArg(IT8951_TCON_MEM_BST_WR , usArg , 4);
}
//-----------------------------------------------------------
//Host Cmd 9---MEM_BST_END
//-----------------------------------------------------------
void IT8951MemBurstEnd(void)
{
    LCDWriteCmdCode(IT8951_TCON_MEM_BST_END);
}

uint16_t IT8951GetVCOM(void)
{
	uint16_t vcom;
	
	LCDWriteCmdCode(USDEF_I80_CMD_VCOM);
	LCDWriteData(0);
	//Read data from Host Data bus
	vcom = LCDReadData();
	return vcom;
}

void IT8951SetVCOM(uint16_t vcom)
{
	LCDWriteCmdCode(USDEF_I80_CMD_VCOM);
	LCDWriteData(1);
	//Read data from Host Data bus
	LCDWriteData(vcom);
}

//-----------------------------------------------------------
//Example of Memory Burst Write
//-----------------------------------------------------------
// ****************************************************************************************
// Function name: IT8951MemBurstWriteProc( )
//
// Description:
//   IT8951 Burst Write procedure
//      
// Arguments:
//      uint32_t ulMemAddr: IT8951 Memory Target Address
//      uint32_t ulWriteSize: Write Size (Unit: Word)
//      uint8_t* pDestBuf - Buffer of Sent data
// Return Values:
//   NULL.
// Note:
//
// ****************************************************************************************
void IT8951MemBurstWriteProc(uint32_t ulMemAddr , uint32_t ulWriteSize, uint16_t* pSrcBuf )
{
    
    uint32_t i;
 
    //Send Burst Write Start Cmd and Args
    IT8951MemBurstWrite(ulMemAddr , ulWriteSize);
 
    //Burst Write Data
    for(i=0;i<ulWriteSize;i++)
    {
        LCDWriteData(pSrcBuf[i]);
    }
 
    //Send Burst End Cmd
    IT8951MemBurstEnd();
}

// ****************************************************************************************
// Function name: IT8951MemBurstReadProc( )
//
// Description:
//   IT8951 Burst Read procedure
//      
// Arguments:
//      uint32_t ulMemAddr: IT8951 Read Memory Address
//      uint32_t ulReadSize: Read Size (Unit: Word)
//      uint8_t* pDestBuf - Buffer for storing Read data
// Return Values:
//   NULL.
// Note:
//
// ****************************************************************************************
void IT8951MemBurstReadProc(uint32_t ulMemAddr , uint32_t ulReadSize, uint16_t* pDestBuf )
{
    //Send Burst Read Start Cmd and Args
    IT8951MemBurstReadTrigger(ulMemAddr , ulReadSize);
          
    //Burst Read Fire
    IT8951MemBurstReadStart();
    
    //Burst Read Request for SPI interface only
    LCDReadNData(pDestBuf, ulReadSize);

    //Send Burst End Cmd
    IT8951MemBurstEnd(); //the same with IT8951MemBurstEnd()
}

//-----------------------------------------------------------
//Host Cmd 10---LD_IMG
//-----------------------------------------------------------
void IT8951LoadImgStart(IT8951LdImgInfo* pstLdImgInfo)
{
    uint16_t usArg;
    //Setting Argument for Load image start
    usArg = (pstLdImgInfo->usEndianType << 8 )
    |(pstLdImgInfo->usPixelFormat << 4)
    |(pstLdImgInfo->usRotate);
    //Send Cmd
    LCDWriteCmdCode(IT8951_TCON_LD_IMG);
    //Send Arg
    LCDWriteData(usArg);
}
//-----------------------------------------------------------
//Host Cmd 11---LD_IMG_AREA
//-----------------------------------------------------------
void IT8951LoadImgAreaStart(IT8951LdImgInfo* pstLdImgInfo ,IT8951AreaImgInfo* pstAreaImgInfo)
{
    uint16_t usArg[5];
    //Setting Argument for Load image start
    usArg[0] = (pstLdImgInfo->usEndianType << 8 )
    |(pstLdImgInfo->usPixelFormat << 4)
    |(pstLdImgInfo->usRotate);
    usArg[1] = pstAreaImgInfo->usX;
    usArg[2] = pstAreaImgInfo->usY;
    usArg[3] = pstAreaImgInfo->usWidth;
    usArg[4] = pstAreaImgInfo->usHeight;
    //Send Cmd and Args
    LCDSendCmdArg(IT8951_TCON_LD_IMG_AREA , usArg , 5);
}
//-----------------------------------------------------------
//Host Cmd 12---LD_IMG_END
//-----------------------------------------------------------
void IT8951LoadImgEnd(void)
{
    LCDWriteCmdCode(IT8951_TCON_LD_IMG_END);
}

void GetIT8951SystemInfo(void* pBuf)
{
	uint16_t* pusWord = (uint16_t*)pBuf;
	IT8951DevInfo* pstDevInfo;

	//Send I80 CMD
	LCDWriteCmdCode(USDEF_I80_CMD_GET_DEV_INFO);
 
	//Burst Read Request for SPI interface only
	LCDReadNData(pusWord, sizeof(IT8951DevInfo)/2);//Polling HRDY for each words(2-bytes) if possible
	
	//Show Device information of IT8951
	pstDevInfo = (IT8951DevInfo*)pBuf;
	printf("Panel(W,H) = (%d,%d)\r\n",
	pstDevInfo->usPanelW, pstDevInfo->usPanelH );
	printf("Image Buffer Address = %X\r\n",
	pstDevInfo->usImgBufAddrL | (pstDevInfo->usImgBufAddrH << 16));
	//Show Firmware and LUT Version
	printf("FW Version = %s\r\n", (uint8_t*)pstDevInfo->usFWVersion);
	printf("LUT Version = %s\r\n", (uint8_t*)pstDevInfo->usLUTVersion);
}

//-----------------------------------------------------------
//Initial function 2---Set Image buffer base address
//-----------------------------------------------------------
void IT8951SetImgBufBaseAddr(uint32_t ulImgBufAddr)
{
	uint16_t usWordH = (uint16_t)((ulImgBufAddr >> 16) & 0x0000FFFF);
	uint16_t usWordL = (uint16_t)( ulImgBufAddr & 0x0000FFFF);
	//Write LISAR Reg
	IT8951WriteReg(LISAR + 2 ,usWordH);
	IT8951WriteReg(LISAR ,usWordL);
}

//-----------------------------------------------------------
// 3.6. Display Functions
//-----------------------------------------------------------

//-----------------------------------------------------------
//Display function 1---Wait for LUT Engine Finish
//                     Polling Display Engine Ready by LUTNo
//-----------------------------------------------------------
void IT8951WaitForDisplayReady()
{
	//Check IT8951 Register LUTAFSR => NonZero Busy, 0 - Free
	while(IT8951ReadReg(LUTAFSR));
}

//-----------------------------------------------------------
//Display function 2---Load Image Area process
//-----------------------------------------------------------
void IT8951HostAreaPackedPixelWrite(IT8951LdImgInfo* pstLdImgInfo,IT8951AreaImgInfo* pstAreaImgInfo)
{
	uint32_t i,j;
	//Source buffer address of Host
	uint16_t* pusFrameBuf = (uint16_t*)pstLdImgInfo->ulStartFBAddr;

	//Set Image buffer(IT8951) Base address
	IT8951SetImgBufBaseAddr(pstLdImgInfo->ulImgBufBaseAddr);
	//Send Load Image start Cmd
	IT8951LoadImgAreaStart(pstLdImgInfo , pstAreaImgInfo);
	//Host Write Data
	for(j=0;j< pstAreaImgInfo->usHeight;j++)
	{
		 for(i=0;i< pstAreaImgInfo->usWidth/2;i++)
			{
					//Write a Word(2-Bytes) for each time
					LCDWriteData(*pusFrameBuf);
					pusFrameBuf++;
			}
	}
	//Send Load Img End Command
	IT8951LoadImgEnd();
}

//-----------------------------------------------------------
//Display functions 3---Application for Display panel Area
//-----------------------------------------------------------
void IT8951DisplayArea(uint16_t usX, uint16_t usY, uint16_t usW, uint16_t usH, uint16_t usDpyMode)
{
	//Send I80 Display Command (User defined command of IT8951)
	LCDWriteCmdCode(USDEF_I80_CMD_DPY_AREA); //0x0034
	//Write arguments
	LCDWriteData(usX);
	LCDWriteData(usY);
	LCDWriteData(usW);
	LCDWriteData(usH);
	LCDWriteData(usDpyMode);
}

//Display Area with bitmap on EPD
//-----------------------------------------------------------
// Display Function 4---for Display Area for 1-bpp mode format
//   the bitmap(1bpp) mode will be enable when Display
//   and restore to Default setting (disable) after displaying finished
//-----------------------------------------------------------
void IT8951DisplayArea1bpp(uint16_t usX, uint16_t usY, uint16_t usW, uint16_t usH, uint16_t usDpyMode, uint8_t ucBGGrayVal, uint8_t ucFGGrayVal)
{
    //Set Display mode to 1 bpp mode - Set 0x18001138 Bit[18](0x1800113A Bit[2])to 1
    IT8951WriteReg(UP1SR+2, IT8951ReadReg(UP1SR+2) | (1<<2));
    
    //Set BitMap color table 0 and 1 , => Set Register[0x18001250]:
    //Bit[7:0]: ForeGround Color(G0~G15)  for 1
    //Bit[15:8]:Background Color(G0~G15)  for 0
    IT8951WriteReg(BGVR, (ucBGGrayVal<<8) | ucFGGrayVal);
    
    //Display
    IT8951DisplayArea( usX, usY, usW, usH, usDpyMode);
    IT8951WaitForDisplayReady();
    
    //Restore to normal mode
    IT8951WriteReg(UP1SR+2, IT8951ReadReg(UP1SR+2) & ~(1<<2));
}

//-------------------------------------------------------------------------------------------------------------
// 	Command - 0x0037 for Display Base addr by User 
//  uint32_t ulDpyBufAddr - Host programmer need to indicate the Image buffer address of IT8951
//                                         In current case, there is only one image buffer in IT8951 so far.
//                                         So Please set the Image buffer address you got  in initial stage.
//                                         (gulImgBufAddr by Get device information 0x0302 command)
//
//-------------------------------------------------------------------------------------------------------------
void IT8951DisplayAreaBuf(uint16_t usX, uint16_t usY, uint16_t usW, uint16_t usH, uint16_t usDpyMode, uint32_t ulDpyBufAddr)
{
    //Send I80 Display Command (User defined command of IT8951)
    LCDWriteCmdCode(USDEF_I80_CMD_DPY_BUF_AREA); //0x0037
    
    //Write arguments
    LCDWriteData(usX);
    LCDWriteData(usY);
    LCDWriteData(usW);
    LCDWriteData(usH);
    LCDWriteData(usDpyMode);
    LCDWriteData((uint16_t)ulDpyBufAddr);       //Display Buffer Base address[15:0]
    LCDWriteData((uint16_t)(ulDpyBufAddr>>16)); //Display Buffer Base address[26:16]
}

//-----------------------------------------------------------
//Test function 1---Software Initial
//-----------------------------------------------------------
uint8_t IT8951_Init()
{
	if (!bcm2835_init()) 
	{
		printf("bcm2835_init error \n");
		return 1;
	}
	
	bcm2835_spi_begin();
	bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);   		//default
	bcm2835_spi_setDataMode(BCM2835_SPI_MODE0);               		//default
	bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_32);		//default
	
	bcm2835_gpio_fsel(CS, BCM2835_GPIO_FSEL_OUTP);  
	bcm2835_gpio_fsel(HRDY, BCM2835_GPIO_FSEL_INPT);
	bcm2835_gpio_fsel(RESET, BCM2835_GPIO_FSEL_OUTP);
	
	bcm2835_gpio_write(CS, HIGH);

	printf("****** IT8951 ******\n");
	
	bcm2835_gpio_write(RESET, LOW);
	bcm2835_delay(100);
	bcm2835_gpio_write(RESET, HIGH);

	//Get Device Info
	GetIT8951SystemInfo(&gstI80DevInfo);
	
	gpFrameBuf = malloc(gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH);
	if (!gpFrameBuf)
	{
		perror("malloc error!\n");
		return 1;
	}
	
 	gulImgBufAddr = gstI80DevInfo.usImgBufAddrL | (gstI80DevInfo.usImgBufAddrH << 16);
 	
 	//Set to Enable I80 Packed mode
 	IT8951WriteReg(I80CPCR, 0x0001);

	if (VCOM != IT8951GetVCOM())
	{
		IT8951SetVCOM(VCOM);
		printf("VCOM = -%.02fV\n",(float)IT8951GetVCOM()/1000);
	}
	
	return 0;
}

void IT8951_Cancel()
{
	free(gpFrameBuf);

	bcm2835_spi_end();
	bcm2835_close();
}


//-----------------------------------------------------------
//Test function 2---Example of Display Flow
//-----------------------------------------------------------
void IT8951DisplayExample()
{
	IT8951LdImgInfo stLdImgInfo;
	IT8951AreaImgInfo stAreaImgInfo;
	
	//Prepare image
	//Write pixel 0xF0(White) to Frame Buffer
 	memset(gpFrameBuf, 0xF0, gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH);
	
 	//Check TCon is free ? Wait TCon Ready (optional)
 	IT8951WaitForDisplayReady();
 	
 	//--------------------------------------------------------------------------------------------
 	//      initial display - Display white only
 	//--------------------------------------------------------------------------------------------
 	//Load Image and Display
 	//Setting Load image information
 	stLdImgInfo.ulStartFBAddr    = (uint32_t)gpFrameBuf;
 	stLdImgInfo.usEndianType     = IT8951_LDIMG_L_ENDIAN;
 	stLdImgInfo.usPixelFormat    = IT8951_8BPP;
 	stLdImgInfo.usRotate         = IT8951_ROTATE_0;
 	stLdImgInfo.ulImgBufBaseAddr = gulImgBufAddr;
 	//Set Load Area
 	stAreaImgInfo.usX      = 0;
 	stAreaImgInfo.usY      = 0;
 	stAreaImgInfo.usWidth  = gstI80DevInfo.usPanelW;
 	stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
 	
 	//Load Image from Host to IT8951 Image Buffer
 	IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
 	//Display Area ?V (x,y,w,h) with mode 0 for initial White to clear Panel
 	IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 0);
 	
 	//--------------------------------------------------------------------------------------------
 	//      Regular display - Display Any Gray colors with Mode 2 or others
 	//--------------------------------------------------------------------------------------------
 	//Preparing buffer to All black (8 bpp image)
 	//or you can create your image pattern here..
 	memset(gpFrameBuf, 0x00, gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH);
 	 
 	IT8951WaitForDisplayReady();
 	
 	//Setting Load image information
 	stLdImgInfo.ulStartFBAddr    = (uint32_t)gpFrameBuf;
 	stLdImgInfo.usEndianType     = IT8951_LDIMG_L_ENDIAN;
 	stLdImgInfo.usPixelFormat    = IT8951_8BPP; 
 	stLdImgInfo.usRotate         = IT8951_ROTATE_0;
 	stLdImgInfo.ulImgBufBaseAddr = gulImgBufAddr;
 	//Set Load Area
 	stAreaImgInfo.usX      = 0;
 	stAreaImgInfo.usY      = 0;
 	stAreaImgInfo.usWidth  = gstI80DevInfo.usPanelW;
 	stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
 	
 	//Load Image from Host to IT8951 Image Buffer
 	IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
 	//Display Area ?V (x,y,w,h) with mode 2 for fast gray clear mode - depends on current waveform 
 	IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 2);
}

void IT8951DisplayExample2()
{
	IT8951LdImgInfo stLdImgInfo;
	IT8951AreaImgInfo stAreaImgInfo;
	
	uint16_t width = gstI80DevInfo.usPanelW;
	uint16_t high = gstI80DevInfo.usPanelH/16;
	
	//--------------------------------------------------------------------------------------------
	//      Regular display - Display Any Gray colors with Mode 2 or others
	//--------------------------------------------------------------------------------------------
	//Preparing buffer to All black (8 bpp image)
	//or you can create your image pattern here..
	memset(gpFrameBuf                 ,  0x00, width * high * 1);
	memset(gpFrameBuf+width * high * 1,  0x11, width * high * 1);
	memset(gpFrameBuf+width * high * 2,  0x22, width * high * 1);
	memset(gpFrameBuf+width * high * 3,  0x33, width * high * 1);
	memset(gpFrameBuf+width * high * 4,  0x44, width * high * 1);
	memset(gpFrameBuf+width * high * 5,  0x55, width * high * 1);
	memset(gpFrameBuf+width * high * 6,  0x66, width * high * 1);
	memset(gpFrameBuf+width * high * 7,  0x77, width * high * 1);
	memset(gpFrameBuf+width * high * 8,  0x88, width * high * 1);
	memset(gpFrameBuf+width * high * 9,  0x99, width * high * 1);
	memset(gpFrameBuf+width * high * 10, 0xaa, width * high * 1);
	memset(gpFrameBuf+width * high * 11, 0xbb, width * high * 1);
	memset(gpFrameBuf+width * high * 12, 0xcc, width * high * 1);
	memset(gpFrameBuf+width * high * 13, 0xdd, width * high * 1);
	memset(gpFrameBuf+width * high * 14, 0xee, width * high * 1);
	memset(gpFrameBuf+width * high * 15, 0xff, gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH - width * high * 15);
	IT8951WaitForDisplayReady();
	//Setting Load image information
	stLdImgInfo.ulStartFBAddr    = (uint32_t)gpFrameBuf;
	stLdImgInfo.usEndianType     = IT8951_LDIMG_L_ENDIAN;
	stLdImgInfo.usPixelFormat    = IT8951_8BPP; 
	stLdImgInfo.usRotate         = IT8951_ROTATE_0;
	stLdImgInfo.ulImgBufBaseAddr = gulImgBufAddr;
	//Set Load Area
	stAreaImgInfo.usX      = 0;
	stAreaImgInfo.usY      = 0;
	stAreaImgInfo.usWidth  = gstI80DevInfo.usPanelW;
	stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
	//Load Image from Host to IT8951 Image Buffer
	IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
	//Display Area ?V (x,y,w,h) with mode 2 for fast gray clear mode - depends on current waveform 
	IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 2);
}

extern uint16_t bmp01[];

void IT8951_GUI_Example()
{
	IT8951LdImgInfo stLdImgInfo;
	IT8951AreaImgInfo stAreaImgInfo;
	Point point[4];
	
	//memset(gpFrameBuf, 0xff, gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH);
	uint16_t width = gstI80DevInfo.usPanelW;
    uint16_t high = gstI80DevInfo.usPanelH;
	
	EPD_Clear(0xff);

	EPD_DrawLine(width/4, high/4, width/2, high/2, 0x40);
	EPD_DrawLine(width/2, high/2, width*3/4, high/4, 0x40);
	EPD_DrawLine(width*3/4, high/4, width/2, 0, 0x40);
	EPD_DrawLine(width/2, 0, width/4, high/4, 0x40);
	
	EPD_DrawRect(width/4, 0, width/2, high/2, 0x00);
	
	EPD_DrawCircle(width/2, high/4, high/4, 0x00);
	
	point[0].X = width/2;
	point[0].Y = 0;
	
	point[1].X = width/4;
	point[1].Y = high/2;

	point[2].X = width/2;
	point[2].Y = high;

	point[3].X = width*3/4;
	point[3].Y = high/2;

	EPD_DrawPolygon(point, 4, 0x00);
	
	EPD_DrawEllipse(width/2, high/2, width/4, high/4, 0x00);
	
	EPD_FillRect(width/12, high*8/10, width/10, high/10, 0x00);
	
	EPD_FillCircle(width*10/12, high*8/10, width/10, 0x00);
	
	EPD_Text(0,  0, (uint8_t*)"hello world",0x00, 0xff);
 
	//EPD_DrawMatrix(0,0,550,412,bmp01);
	
	IT8951WaitForDisplayReady();
	
	//Setting Load image information
	stLdImgInfo.ulStartFBAddr    = (uint32_t)gpFrameBuf;
	stLdImgInfo.usEndianType     = IT8951_LDIMG_L_ENDIAN;
	stLdImgInfo.usPixelFormat    = IT8951_8BPP; 
	stLdImgInfo.usRotate         = IT8951_ROTATE_0;
	stLdImgInfo.ulImgBufBaseAddr = gulImgBufAddr;
	//Set Load Area
	stAreaImgInfo.usX      = 0;
	stAreaImgInfo.usY      = 0;
	stAreaImgInfo.usWidth  = gstI80DevInfo.usPanelW;
	stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
	
	//Load Image from Host to IT8951 Image Buffer
	IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
	
	IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 2);
}

void IT8951_BMP_Example(uint32_t x, uint32_t y,char *path)
{
	IT8951LdImgInfo stLdImgInfo;
	IT8951AreaImgInfo stAreaImgInfo;
	
	EPD_Clear(0xff);
	
	//ÏÔʾͼÏñ
	Show_bmp(x,y,path);

	IT8951WaitForDisplayReady();
	
	//Setting Load image information
	stLdImgInfo.ulStartFBAddr    = (uint32_t)gpFrameBuf;
	stLdImgInfo.usEndianType     = IT8951_LDIMG_L_ENDIAN;
	stLdImgInfo.usPixelFormat    = IT8951_8BPP; 
	stLdImgInfo.usRotate         = IT8951_ROTATE_0;
	stLdImgInfo.ulImgBufBaseAddr = gulImgBufAddr;
	//Set Load Area
	stAreaImgInfo.usX      = 0;
	stAreaImgInfo.usY      = 0;
	stAreaImgInfo.usWidth  = gstI80DevInfo.usPanelW;
	stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
	
	//Load Image from Host to IT8951 Image Buffer
	IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
	//Display Area ?V (x,y,w,h) with mode 2 for fast gray clear mode - depends on current waveform 
	IT8951DisplayArea(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 2);
}

//-----------------------------------------------------------
// Load 1bpp image flow (must display with IT8951DisplayArea1bpp()
//-----------------------------------------------------------

void IT8951Load1bppImage(uint8_t* p1bppImgBuf, uint16_t usX, uint16_t usY, uint16_t usW, uint16_t usH)
{
    IT8951LdImgInfo stLdImgInfo;
    IT8951AreaImgInfo stAreaImgInfo;
	
    //Setting Load image information
    stLdImgInfo.ulStartFBAddr    = (uint32_t) p1bppImgBuf;
    stLdImgInfo.usEndianType     = IT8951_LDIMG_L_ENDIAN;
    stLdImgInfo.usPixelFormat    = IT8951_8BPP; //we use 8bpp because IT8951 dose not support 1bpp mode for load image?Aso we use Load 8bpp mode ,but the transfer size needs to be reduced to Size/8
    stLdImgInfo.usRotate         = IT8951_ROTATE_0;
    stLdImgInfo.ulImgBufBaseAddr = gulImgBufAddr;
    //Set Load Area
    stAreaImgInfo.usX      = usX/8;
    stAreaImgInfo.usY      = usY;
    stAreaImgInfo.usWidth  = usW/8;//1bpp, Chaning Transfer size setting to 1/8X of 8bpp mode 
    stAreaImgInfo.usHeight = usH;
    printf("IT8951HostAreaPackedPixelWrite [wait]\n\r");
    //Load Image from Host to IT8951 Image Buffer
    IT8951HostAreaPackedPixelWrite(&stLdImgInfo, &stAreaImgInfo);//Display function 2
}

//-----------------------------------------------------------
//Test function 3---Example of Display 1bpp Flow
//-----------------------------------------------------------
void IT8951Display1bppExample()
{
    IT8951AreaImgInfo stAreaImgInfo;
    
    //Prepare image
    //Write pixel 0x00(Black) to Frame Buffer
    //or you can create your image pattern here..
     memset(gpFrameBuf, 0x00, (gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH)/8);//Host Frame Buffer(Source)
     
     //Check TCon is free ? Wait TCon Ready (optional)
     IT8951WaitForDisplayReady();
     
     //Load Image and Display
     //Set Load Area
     stAreaImgInfo.usX      = 0;
     stAreaImgInfo.usY      = 0;
     stAreaImgInfo.usWidth  = gstI80DevInfo.usPanelW;
     stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
     //Load Image from Host to IT8951 Image Buffer
     IT8951Load1bppImage(gpFrameBuf, stAreaImgInfo.usX, stAreaImgInfo.usY, stAreaImgInfo.usWidth, stAreaImgInfo.usHeight);//Display function 4, Arg
     
     //Display Area - (x,y,w,h) with mode 2 for Gray Scale
     //e.g. if we want to set b0(Background color) for Black-0x00 , Set b1(Foreground) for White-0xFF
     IT8951DisplayArea1bpp(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 0, 0x00, 0xFF);
}

void IT8951Display1bppExample2()
{
    IT8951AreaImgInfo stAreaImgInfo;
    
    //Prepare image
    //Write pixel 0x00(Black) to Frame Buffer
    //or you can create your image pattern here..
    memset(gpFrameBuf, 0xff, (gstI80DevInfo.usPanelW * gstI80DevInfo.usPanelH)/8);//Host Frame Buffer(Source)
    
    //Check TCon is free ? Wait TCon Ready (optional)
    IT8951WaitForDisplayReady();
    
    //Load Image and Display
    //Set Load Area
    stAreaImgInfo.usX      = 0;
    stAreaImgInfo.usY      = 0;
    stAreaImgInfo.usWidth  = gstI80DevInfo.usPanelW;
    stAreaImgInfo.usHeight = gstI80DevInfo.usPanelH;
    //Load Image from Host to IT8951 Image Buffer
    IT8951Load1bppImage(gpFrameBuf, stAreaImgInfo.usX, stAreaImgInfo.usY, stAreaImgInfo.usWidth, stAreaImgInfo.usHeight);//Display function 4, Arg
    
    //Display Area - (x,y,w,h) with mode 2 for Gray Scale
    //e.g. if we want to set b0(Background color) for Black-0x00 , Set b1(Foreground) for White-0xFF
    IT8951DisplayArea1bpp(0,0, gstI80DevInfo.usPanelW, gstI80DevInfo.usPanelH, 0, 0x00, 0xFF);
}