s6a0074.c

应用LCD测试

// Functions for S6A0078
// Send a byte to LCD Controller
void SendByte(bit DatCmd, uint8 dByte)
{
	#ifdef LCD_4BIT
		LCD_DataPort = 0x0F;
		LCD_RS = DatCmd;
		LCD_RW = 0;
		LCD_E = 1;
		LCD_DataPort = dByte & 0xF0;	//Higher 4-bit
//		DelayUs(100);
		LCD_E = 0;
		LCD_E = 1;
		LCD_DataPort = dByte << 4;		//Lower 4-bit
//		DelayUs(100);
		LCD_E = 0;
	#elif defined(LCD_8BIT)
		LCD_DataPort = 0x00;
		LCD_RS = DatCmd;
		LCD_RW = 0;
		LCD_E = 1;
		LCD_DataPort = dByte;
		DelayUs(50);
		LCD_E = 0;
	#endif
	DelayUs(500);
}

// Read a byte from DDRAM/CGRAM/SEGRAM
uint8 ReadByte(void)
{
	uint8 Result;
	#ifdef LCD_4BIT
		LCD_DataPort = 0xF0;
		LCD_RS = iDat;
		LCD_RW = 1;
		LCD_E = 1;
		LCD_E = 0;
		DelayUs(50);
		Result = LCD_DataPort & 0xF0;	//Higher 4-bit		
		LCD_E = 1;
		LCD_E = 0;
		DelayUs(50);
		Result |= LCD_DataPort >> 4;		//Lower 4-bit		
	#elif defined(LCD_8BIT)
		LCD_DataPort = 0xFF;
		LCD_RS = iDat;
		LCD_RW = 1;
		LCD_E = 1;
		LCD_E = 0;
		DelayUs(50);
		Result = LCD_DataPort;
	#endif
	return Result;
}

// Move Cursor or display
void Move(uint8 dir)
{
	SendByte(iCmd, dir);
}

// Goto specific location
void Gotoxy(uint8 Row, uint8 Col)
{
	#if defined(LCD_L2)
	switch (Row)
	{
		case 2:
			SendByte(iCmd, LCD_L2 + Col); break;
		#if defined(LCD_L3)
		case 3:
			SendByte(iCmd, LCD_L3 + Col); break;
		#endif
		#if defined(LCD_L4)
		case 4:
			SendByte(iCmd, LCD_L4 + Col); break;
		#endif
		default:
			SendByte(iCmd, LCD_L1 + Col); break;
	}
	#endif
}

// Send a string to LCD Screen
void SendStr(uint8 code *ptString)
{
	while((*ptString) != '\0')
	{
		SendByte(iDat, *ptString++);
	}
}

// Fill CGRAM with array CGRAM[]
void FillCGRAM(void)
{
	uint8 i;
//	SendByte(iCmd, 0x08);//display off
	SendByte(iCmd, LCD_CGRAM_ADDR);
	for (i = 0; i < LCD_CGMAX; i++)
	{
		SendByte(iDat, CGRAM[i]); // (& 0x3F) will disable blink
	}
//	SendByte(iCmd, 0x0c);//display on
}

// Show All patterns in CGRAM
void ShowCGRAM(void)
{
	uint8 i,k;
	
	for (i = 0; i < 8; i++)
	{
		SendByte(iCmd, LCD_L1);
		for (k = 0; k < LCD_CHAR; k++)
		{
			#if defined(LCD_L2)
			switch (k)
			{
				case LCD_COL:
				SendByte(iCmd, LCD_L2); break;
				#if defined(LCD_L3)
				case LCD_COL*2:
				SendByte(iCmd, LCD_L3); break;
				#endif
				#if defined(LCD_L4)
				case LCD_COL*3:
				SendByte(iCmd, LCD_L4); break;
				#endif
				default:
				break;
			}
			#endif
			SendByte(iDat, i);
		}
		WAC();
	}
}

// Turn ON/OFF the specific ICONs
void SetICON(uint8 SAddr, uint8 State)
{
	SendByte(iCmd, 0x24);
	SendByte(iCmd, 0x40 + SAddr);
	SendByte(iDat, State);
	SendByte(iCmd, 0x28);
}

// Call built-in Charactors
void CallBuiltinChar(void)
{
	uint8 i, k;
	for (i = 0; i < LCD_COL/4; i += LCD_ROW)
	{
		SendByte(iCmd, LCD_L1);
		for (k = 0; k < LCD_CHAR; k++)
		{
			#if defined(LCD_L2)
			switch (k)
			{
				case LCD_COL:
				SendByte(iCmd, LCD_L2); break;
				/*
				#if defined(LCD_L3)
				case LCD_COL*2:
				SendByte(iCmd, LCD_L3); break;
				#endif
				#if defined(LCD_L4)
				case LCD_COL*3:
				SendByte(iCmd, LCD_L4); break;
				#endif
				*/
				default:
				break;
			}
			#endif
			SendByte(iDat, k + LCD_COL*i+32);
		}
		WAC();
	}
}

// Clear Entire Screen
void LCD_CLS(void)
{
	SendByte(iCmd, 0x01);
	DelayMs(5);
	// 2ms delay is Necessary after sending LCD_CLS command !!!
}

// Wait some time then clear the screen
void WAC(void)
{
	DelayMs(800);
	LCD_CLS();
}

// LCD initialize procedure
void LCD_Initial(void)
{
	DelayMs(200);				// Wait for internal initialization
	#ifdef LCD_4BIT
		SendByte(iCmd, 0x20);	// Function Set
		SendByte(iCmd, 0x28);	// Function Set(4-bit/1-line)
	#elif LCD_8BIT
		SendByte(iCmd, 0x38);	// Function Set(4-bit/2-line)
	#endif
	SendByte(iCmd, 0x24);		// Extended function set
	SendByte(iCmd, 0x08);		// Set font(5 dots)
	
	SendByte(iCmd, 0x20);		// Basic function set
//	SendByte(iCmd, 0x0C);		// Enable Display
//	LCD_CLS();
	SendByte(iCmd, 0x06);		// Entry Mode Set
	SendByte(iCmd, 0x0c);		//display off
}