玩个低价的投影机镜头模组 - 数码之家

#include "N76E003.h"
#include "SFR_Macro.h"
#include "Function_define.h"
#include "Common.h"
#include "Delay.h"
#define H (1)
#define L (0)
#define TVP_RESETB P12
#define GRSTB P04
#define CS P15
#define SDAT P00
#define SCLK P10
#define I2C_CLOCK 0x27 //Fclk = Fsys / (4*(prescalar + 1))
#define I2C_ACK 0
#define I2C_NACK 1
#define timeout_count 1000
void Delay10ms() //@16MHz
{
unsigned char i, j;
_nop_();
i = 208;
j = 200;
do
{
while (--j);
} while (--i);
}
void I2C_init(void)
{
I2CLK = I2C_CLOCK;
set_I2CEN;
}
void I2C_start(void)
{
signed int t = timeout_count;
set_STA;
clr_SI;
while((SI == 0) && (t > 0))
{
t--;
};
}
void I2C_stop(void)
{
signed int t = timeout_count;
clr_SI;
set_STO;
while((STO == 1) && (t > 0))
{
t--;
};
}
unsigned char I2C_read(unsigned char ack_mode)
{
signed int t = timeout_count;
unsigned char value = 0x00;
set_AA;
clr_SI;
while((SI == 0) && (t > 0))
{
t--;
};
value = I2DAT;
if(ack_mode == I2C_NACK)
{
t = timeout_count;
clr_AA;
clr_SI;
while((SI == 0) && (t > 0))
{
t--;
};
}
return value;
}
void I2C_write(unsigned char value)
{
signed int t = timeout_count;
I2DAT = value;
clr_STA;
clr_SI;
while((SI == 0) && (t > 0))
{
t--;
};
}
unsigned char TVP5150_read(unsigned char address)
{
unsigned char value = 0x00;
I2C_start();
I2C_write(0xB8);
I2C_write(address);
I2C_start();
I2C_write(0xB9);
value = I2C_read(I2C_NACK);
I2C_stop();
return value;
}
void TVP5150_write(unsigned char address, unsigned char value)
{
I2C_start();
I2C_write(0xB8);
I2C_write(address);
I2C_write(value);
I2C_stop();
}
void TVP5150_init(void)
{
I2C_init();
TVP_RESETB = L;
Delay10ms();
TVP_RESETB = H;
Delay10ms();
TVP5150_write(0x03, 0xFD);//端口信号输出
TVP5150_write(0x04, 0x00);//制式自动检测范围
TVP5150_write(0x0D, 0x47);//视频输出格式
//TVP5150_write(0x12, 0x04);//AVID无效
TVP5150_write(0x13, 0x01);//AVID 结束位置
TVP5150_write(0x14, 0x02);//AVID 结束位置
TVP5150_write(0x16, 0x8c);//HSYNC 初始位置
TVP5150_write(0x09, 0xB1);//明度
TVP5150_write(0x0A, 0xC8);//色度饱和度
TVP5150_write(0x0C, 0xC8);//亮度对比度
}
void lcd_init()
{
CS=H;
SDAT=L;
SCLK=L;
GRSTB=L;
Delay10ms();
GRSTB=H;
Delay10ms();
}
void spi_write(unsigned char addr, unsigned char val)
{
int i;
SCLK=L;
SDAT=L;
CS=L;
//addr
for(i=0;i<6;i++)
{
SCLK=L;
if((addr << i) & 0x20)
{
SDAT=H;
}
else
{
SDAT=L;
}
SCLK=H;
}
//addr
//R/W HiZ
SCLK=L;
SDAT=L; //L write
SCLK=H;
SCLK=L;
SDAT=H;
SCLK=H;
//R/W HiZ
//WRITE
for(i=7;i>=0;i--)
{
SCLK=L;
if((val >> i) & 0x1)
{
SDAT=H;
}
else
{
SDAT=L;
}
SCLK=H;
}
//WRITE
SDAT=L;
SCLK=L;
CS=H;
}
void main (void)
{
Set_All_GPIO_Quasi_Mode; // Define in Function_define.h
TVP5150_init();
lcd_init();
if (P30==0)
{
spi_write(0x2, 0x0d); //YUV模式 PAL制式
}
while(1)
{
}
}

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