#define LCD_ADDR			0x41		//LCD驅動芯片SPI地址
#define	DISP_BUFF_SIZE		26			//顯示緩沖區大小
void spiSendBit(unsigned char bitData)
{
	if (bitData) {
		Set_DO();
	}else{
		Clr_DO();		
	}
	DATA_DELAY();
	Set_SCK();			// 2----時鐘置高，此時數據發送
						//此時讀取數據輸入總線的狀態
	SCK_DELAY();
	Clr_SCK();		//4-----下降沿讀取數據
	SCK_DELAY();
}
void sendBlockData(unsigned int blockData)
{
	unsigned char i;
	for (i=0;i<12;i++) {
		spiSendBit(blockData & (0x0800>>i));
	}
}
void display_buff(BYTE *thisBuff)
{
	BYTE addr=LCD_ADDR; 
	unsigned char bitSum=0;
	unsigned char byteNumber,bitNumber;
	Clr_SS();//cbi(SPI_PORT,SPI_CS);//先發地址,拉低SS
	spi_send_buff(&addr,1);//發送一個字節到總線
	Set_SS();
	for (byteNumber=0;byteNumber<DISP_BUFF_SIZE;byteNumber++) {
		for (bitNumber=0;bitNumber<8;bitNumber++) {
			if (*(thisBuff+byteNumber) & (1<<bitNumber)) {
				spiSendBit(1);		//send '1'
			}else{
				spiSendBit(0);		//send '0'
			}	
			bitSum++;	//總計發送的bit數加一
			if(((bitSum%52)==0) && (bitSum<200))
			{
				sendBlockData(bitSum/52-1);
				Clr_SS();//cbi(SPI_PORT,SPI_CS);//先發地址,拉低SS
				spi_send_buff(&addr,1);//發送一個字節到總線
				Set_SS();
			}
		}
	}
	sendBlockData(0x0003);//第四個com的塊標志
	Clr_SS();//cbi(SPI_PORT,SPI_CS); //發送完畢
}
void disp_set_bit(BYTE *thisBuff,BYTE bitIndex,BYTE value)
{
	if(value)
		thisBuff[bitIndex/8] |= (1<<(bitIndex%8));
	else
		thisBuff[bitIndex/8] &= ~(1<<(bitIndex%8));	
}