spi.c

3.5寸ＴＦＴ开发资料

// spi 控制定义IO如下:
// LCD_VF2:   GPC7   ---------------> LCD_DAT
// LCD_VF1:   GPC6   ---------------> SPI_CLK
// LCD_VF0:   GPC5   ---------------> SPI_CS
// VM:	      GPC4   ---------------> LCD_RESET

#define SET_RST_HIGH 		{ rGPCDAT  |= (0x01<<4);	}
#define SET_RST_LOW  		{ rGPCDAT  &= (~(0x01<<4));	}

#define SET_CS_HIGH             { rGPCDAT  |= (0x01<<5);        }
#define SET_CS_LOW              { rGPCDAT  &= (~(0x01<<5));     }

#define SET_SCK_HIGH		{ rGPCDAT  |= (0x01<<6);        }
#define SET_SCK_LOW             { rGPCDAT  &= (~(0x01<<6));     }

#define SET_SDA_HIGH            { rGPCDAT  |= (0x01<<7);        }
#define SET_SDA_LOW             { rGPCDAT  &= (~(0x01<<7));     }

void SPI_Init(void)
{
	SET_CS_HIGH;
	SET_SCK_HIGH;
	SET_SDA_HIGH;
}
#if 0
// for sumsung:
// type = 0: Index
//	= 1: data
// WRite ID code: Index:  01110100    	0x74
//		  Data:   01110110	0x76
void spi_Write(U8 type,	U16 value)
{
	U8 i,startByte;

	SET_CS_LOW;

	if(type ==0)
		{
		startByte = 0x74;
		}
	else	{
		startByte = 0x76;
		}
	for(i=0; i<8; i++)
		{
		SET_SCK_LOW;
		if(startByte & 0x80)
			{
                	SET_SDA_HIGH;
                	}
		else	{
			SET_SDA_LOW;
			}
		Delay(10);
		SET_SCK_HIGH;         		// 上升沿将数据写出去......
		Delay(10);
		startByte <<= 1;
		}

  	// Write Cmd/Data:
	for(i=0; i<16; i++)
		{
		SET_SCK_LOW;
		if(value & 0x8000)
			{
                	SET_SDA_HIGH;
                	}
		else	{
			SET_SDA_LOW;
			}
		Delay(10);
		SET_SCK_HIGH;         		// 上升沿将数据写出去......
		Delay(10);
		value <<= 1;
		}
	SET_CS_HIGH;
}

void SPI_WriteReg(U8 reg, U16 data)
{
	spi_Write(0,(U16)reg);
	spi_Write(1,data);
}

void SPI_ConfigLCM(void)
{
	SPI_WriteReg(9, 0x0000);
	Delay(20);
	SPI_WriteReg(9,  0x4000);
	SPI_WriteReg(10, 0x2000);
	SPI_WriteReg(9,  0x4055);
	Delay(80);
	SPI_WriteReg(1,  0x409d);
	SPI_WriteReg(2,  0x0204);
	SPI_WriteReg(3,  0x0100);
	SPI_WriteReg(4,  0x3000);
	SPI_WriteReg(5,  0x4003);
	SPI_WriteReg(6,  0x000a);
	SPI_WriteReg(7,  0x0021);
	SPI_WriteReg(8,  0x0c00);
	SPI_WriteReg(10, 0x0103);
	SPI_WriteReg(11, 0x0301);
	SPI_WriteReg(12, 0x1f0f);
	SPI_WriteReg(13, 0x1f0f);
	SPI_WriteReg(14, 0x0707);
	SPI_WriteReg(15, 0x0307);
	SPI_WriteReg(16, 0x0707);
	SPI_WriteReg(17, 0x0000);
	SPI_WriteReg(18, 0x0004);
	SPI_WriteReg(19, 0x0000);
	Delay(40);
	SPI_WriteReg(9, 0x4a55);
	SPI_WriteReg(5, 0x5003);
}
#else

void SPI_WriteReg(U8 reg, U8 value)
{
	U8 i,startByte;

	SET_CS_LOW;
	Delay(5);
	startByte = (reg&0x0f);

	for(i=0; i<5; i++)
		{
		SET_SCK_LOW;
		if(startByte & 0x10) 		// 0001 0000
			{
                	SET_SDA_HIGH;
                	}
		else	{
			SET_SDA_LOW;
			}
		Delay(20);
		SET_SCK_HIGH;         		// 上升沿将数据写出去......
		Delay(20);
		startByte <<= 1;
		}
	for(i=0; i<8; i++)
		{
		SET_SCK_LOW;
		if(value & 0x80)
			{
                	SET_SDA_HIGH;
                	}
		else	{
			SET_SDA_LOW;
			}
		Delay(20);
		SET_SCK_HIGH;         		// 上升沿将数据写出去......
		Delay(20);
		value <<= 1;
		}
	SET_CS_HIGH;
}

//0x02,0x02,0x31,0x2b,
void SPI_ConfigLCM(void)
{
//	SPI_WriteReg(0x00,0x02);   	// R0
//	SPI_WriteReg(0x01,0x02);	// R1
//	SPI_WriteReg(0x02,0x31);	// R2 		0011 0001
//	SPI_WriteReg(0x03,0x2b);	// R3	       	0010 1111
}

#endif