ra8815.c

一个测试LCD的应用程序

// --------------------- Functions for RA8815 ----------------------------------
// LCD Busy Check
void LCD_CheckBusy(void)
{
	while((ReadCmd(0x0F) & 0x80) == 0x80);
}
// Write a command to the register specified by index
void WriteCmd(uint8 index, uint8 dByte)
{
	#ifdef LCD_4SPI
		SPI_CS = 0;
		SPI_A0 = 0;		
		spi_sendbit(0);			// RW = 0 for writing action
		spi_sendbyte(index);
		spi_sendbyte(dByte);
		SPI_CS = 1;
	#elif defined(LCD_3SPI)
		SPI_CS = 0;
		spi_sendbit(0);			// RW = 0 for writing action
		spi_sendbit(0);			// A0 = 0 for command
		spi_sendbyte(index);
		spi_sendbyte(dByte);
		SPI_CS = 1;
	#else
		SendByte(iCmd, index);
		DelayUs(4);
		SendByte(iCmd, dByte);
	#endif
	DelayUs(200);
}

// Write a data to DDRAM
void WriteData(uint8 dByte)
{
	#ifdef LCD_4SPI
		SPI_CS = 0;	
		SPI_A0 = 1;
		spi_sendbit(0);			// RW = 0 for writing action
		spi_sendbyte(dByte);
		SPI_CS = 1;
	#elif defined(LCD_3SPI)
		SPI_CS = 0;		
		spi_sendbit(0);			// RW = 0 for writing action
		spi_sendbit(1);			// A0 = 1 for data
		spi_sendbyte(dByte);
		SPI_CS = 1;	
	#endif
	LCD_CheckBusy();	
	SendByte(iDat, dByte);
	//DelayMs(1);
	DelayUs(250);
	DelayUs(250);
}

// Read a Commamd from index register
uint8 ReadCmd(uint8 index)
{
	uint8 Result;
	#ifdef MCU_6800
		SendByte(iCmd, index);
		LCD_DataPort = 0xFF;
		LCD_CS = 0;
		LCD_A0 = 0;
		LCD_RW = 1;
		LCD_E = 1;
		DelayUs(4);
		Result = LCD_DataPort;
		LCD_E = 0;
		LCD_A0 = 1;
		LCD_RW = 1;
		LCD_CS = 1;
		LCD_DataPort = 0xFF;
	#elif defined(MCU_8080)
		SendByte(iCmd, index);
		DelayUs(4);
		LCD_DataPort = 0xFF;
		LCD_CS = 0;
		LCD_A0 = 0;
		LCD_WR = 1;
		LCD_RD = 0;
		DelayUs(4);
		Result = LCD_DataPort;
		LCD_RD = 1;
		LCD_A0 = 1;
		LCD_CS = 1;
		LCD_DataPort = 0xFF;
	#elif defined(LCD_4SPI)
		SPI_CS = 0;
		SPI_A0 = 0;				// Command		
		spi_sendbit(1);			// RW = 1 for Read		
		spi_sendbyte(index);
		Result = spi_readbyte();		
		SPI_CS = 1;
	#elif defined(LCD_3SPI)
		SPI_CS = 0;
		spi_sendbit(1);		// RW = 1 for Reading Action	
		spi_sendbit(0);		// A0 = 0 for Command
		spi_sendbyte(index);		
		Result = spi_readbyte();		
		SPI_CS = 1;
	#endif
	return Result;
}

// Read a data from DDRAM
uint8 ReadData(uint8 xUnit, yBit)
{
	uint8 Result;
	Gotoxy(xUnit, yBit);
	#ifdef MCU_6800
		LCD_DataPort = 0xFF;	// Set the port as Input
		LCD_CS = 0;
		LCD_A0 = 1;				// Data		
		LCD_RW = 1;
		LCD_E = 1;
		Result = LCD_DataPort;
		LCD_E = 0;
		DelayUs(100);
		LCD_CS = 1;
		LCD_DataPort = 0xFF;
	#elif defined(MCU_8080)
		LCD_DataPort = 0xFF;	// Set the port as Input
		LCD_CS = 0;
		LCD_A0 = 1;				// Data
		LCD_WR = 1;
		LCD_RD = 0;
		DelayUs(4);
		Result = LCD_DataPort;
		LCD_RD = 1;
		LCD_CS = 1;
		LCD_DataPort = 0xFF;
	#elif defined(LCD_4SPI)
		SPI_CS = 0;		
		SPI_A0 = 1;			// A0 = 1 for Data
		spi_sendbit(1);		// RW = 1 for Reading Action		
		Result = spi_readbyte();		
		SPI_CS = 1;
	#elif defined(LCD_3SPI)
		SPI_CS = 0;
		spi_sendbit(1);		// RW = 1 for Reading Action
		spi_sendbit(1);		// A0 = 1 for Data		
		Result = spi_readbyte();
		SPI_CS = 1;
	#endif
	return Result;
}
// Set LCD Drawing Mode
void SetMode(uint8 iMode)
{
	uint8 temp;	
	temp = ReadCmd(0x03);
	switch (iMode)
	{
		case 0:
			temp &= 0xFC; break;
		case 1:
			temp |= 0x01;
			temp &= 0xFD; break;
		case 2:
			temp &= 0xFE;
			temp |= 0x02; break;
		case 3:
			temp |= 0x03; break;
		default:
			temp &= 0xFC; break;
	}	
	WriteCmd(0x03, temp);
}

// Goto a specific position
void Gotoxy(uint8 xUnit, uint8 yBit)
{
	WriteCmd(0x05, xUnit);	// xUnit < X_MAX/8
	WriteCmd(0x06, yBit);	// yBit < Y_MAX
}

// Display a string of Ascii chars on the screen
void SendStr(uint8 *ptrString, uint16 tDelay)
{
	while(*ptrString != '\0')
	{
		WriteData(*ptrString++);
		DelayMs(tDelay);	// Display a letter each tDelay Ms.
	}
}

// Clear LCD Screen
void LCD_CLS(void)
{
	uint8 temp;
	temp = ReadCmd(0x01);
	temp |= 0x40;
	WriteCmd(0x01, temp);
}

// wait and clear
void wait_and_clear(void)
{
	DelayMs(1000);
	LCD_CLS();
}

// Turn On LCD display
void LCD_ON(void)
{
	uint8 temp;
	temp = ReadCmd(0x01);
	temp |= 0x02;
	WriteCmd(0x01, temp);
}

// Turn Off LCD display
void LCD_OFF(void)
{
	uint8 temp;
	temp = ReadCmd(0x01);
	temp &= 0xFD;
	WriteCmd(0x01, temp);
}

// LCD Initialization
void LCD_Initial(void)
{
	LCD_Reset();
	
	WriteCmd(0x02, 0x71);		// System setting(BIG5, 128s*32c)
	WriteCmd(0x03, 0x00);		// Memory Writting Mode(Normal, Small Ascii)
	WriteCmd(0x10, 0x80);		// Bias and Contrast Setting(1/6Bias)
	WriteCmd(0x11, 0xF2);		// Driving Control(Internal Power, Normal Dir.)
	WriteCmd(0x12, 0xE2);		// Driving Control
	WriteCmd(0x13, 0x00);		// Blink Control
	WriteCmd(0x04, 0x00);		// Cursor setting(show a blink cursor with 1pix)
	LCD_CLS();
	LCD_ON();
}

// LCD Graphic Testing
void LCD_Test(void)
{
	uint8 k;
	uint16 i;
	uint8 code TestData[][2] =
	{
		{0xFF,0xFF},	// 1. All
		{0x00,0x00},	// 2. None
		{0xAA,0xAA},	// 3. Virtical 1
		{0x55,0x55},	// 4. Virtical 2
		{0xFF,0x00},	// 5. Horizontal 1
		{0x00,0xFF},	// 6. Horizontal 2
		{0xAA,0x55},	// 7. Stars 2
		{0x55,0xAA},	// 8. Stars 2
	};

	SetMode(GRAPHIC);
	for(k = 0; k < 8; k++)
	{
		Gotoxy(0,0);
		for(i = 0; i < Screen_Size; i++)
		{
			if ((i/(X_MAX/8))%2 != 0)
				WriteData(TestData[k][1]);
			else
				WriteData(TestData[k][0]);
		}
		wait_and_clear();
	}
}