lcdiof.c

一个测试LCD的应用程序

// ------------------ The Basic I/O functions for LCD --------------------------
/*  FileName: lcdiof.c
	Version : 0.1
	Last Updated: 2007-1-6
	Description:
	This library contains the necessary functions for input and output data 
	to the controller IC of LCM.
*/

#ifdef __PORT_CONFIG__
	// Port configuration of MCU
	void PortConfig(void)
	{
		#if defined(MCU_6800)
			LCD_PS = 1;
			LCD_C86 = 1;
		#elif defined(MCU_8080)
			LCD_PS = 1;
			LCD_C86 = 0;
		#elif defined(LCD_4SPI)
			P3 = 0xFF;
			LCD_DataPort = 0xFF;
			LCD_PS = 0;
			LCD_C86 = 0;
		#elif defined(LCD_3SPI)
			P3 = 0xFF;
			LCD_DataPort = 0xFF;
			LCD_PS = 0;
			LCD_C86 = 1;
		#elif defined(LCD_I2C)
			P3 = 0xFF;
			LCD_DataPort = 0xFF;
			LCD_PS = 1;
			LCD_C86 = 1;
		#endif
	}
#endif

// Reset LCD
void LCD_Reset(void)
{
	LCD_RST = 0;
	DelayMs(30);
	LCD_RST = 1;
	DelayMs(500);
}

// Function for sending a byte to LCD
void SendByte(bit DatCmd, uint8 dByte)
{
	#ifdef MCU_6800
		LCD_DataPort = 0x00;	// Set the port as Output
		LCD_CS = 0;
		LCD_A0 = DatCmd;		
		LCD_RW = 0;
		LCD_DataPort = dByte;
		LCD_E = 1;		
		LCD_E = 0;
		LCD_RW = 1;
		LCD_CS = 1;
		LCD_DataPort = 0xFF;
	#elif defined(MCU_8080)
		//LCD_DataPort = 0x00;	// Set the port as Output		
		LCD_DataPort = dByte;
		LCD_CS = 0;
		LCD_A0 = DatCmd;
		LCD_RD = 1;
		//LCD_DataPort = dByte;
		LCD_WR = 0;		
		LCD_WR = 1;
		LCD_A0 = 1;
		LCD_CS = 1;
		//LCD_DataPort = 0xFF;
	#elif defined(LCD_4SPI)
		SPI_A0 = DatCmd;
		SPI_CS = 0;
		spi_sendbyte(dByte);
		SPI_CS = 1;
	#elif defined(LCD_3SPI)
		SPI_CS = 0;
		spi_sendbit(DatCmd);	// Sendout LCD_A0
		spi_sendbyte(dByte);
		SPI_CS = 1;
	#elif defined(LCD_I2C)
		I2C_Start();
		I2C_SendByte(LCD_I2C_ADDR);
		if (DatCmd == iDat)
		{
			I2C_SendByte(0x40);
		}
		else
		{
			I2C_SendByte(0x00);
		}
		I2C_SendByte(dByte);
		I2C_Stop();
	#endif	
}