im8803.c

这是嵌入式usb驱动的源码,仅供参考,可花费了好长时间才调通的

/****************************************

	iMagic IM8803
	Sensor Driver
	
***************************************/

#include "khead.h"
#include "mx1hw.h"
#include "im8803.h"
#include "i2c.h"

//
//      GPIO control on sensor
//


//
//      Enter Standby Mode
//
void ADS_standby_enable(void)
{
	//PA23 = standby
	//Active high
	*(U32 *) PTA_GIUS |= 0x00800000;
	*(U32 *) PTA_DDIR |= 0x00800000;	//output port
	*(U32 *) PTA_OCR2 |= 0x0000C000;
	*(U32 *) PTA_DR |= 0x00800000;

	return;
}

void ADS_standby_disable(void)
{
	//PA23 = standby
	//Active high
	*(U32 *) PTA_GIUS |= 0x00800000;
	*(U32 *) PTA_DDIR |= 0x00800000;	//output port
	*(U32 *) PTA_OCR2 |= 0x0000C000;
	*(U32 *) PTA_DR &= ~0x00800000;

	return;
}


//
//      Hard Reset
//
void ADS_sensor_reset(void)
{
	U32 i;

	//PB18 = reset
	//Active low
	*(U32 *) PTB_GIUS |= 0x00040000;
	*(U32 *) PTB_DDIR |= 0x00040000;	//output port
	*(U32 *) PTB_OCR2 |= 0x00000030;
	//assert reset
	*(U32 *) PTB_DR &= ~0x00040000;
	//delay
	for (i = 0; i < 1000000; i++);
	//negate reset
	*(U32 *) PTB_DR |= 0x00040000;

	return;
}


//
//      Auto-flickering Control
//
void ADS_RS_set_level(U32 level)
{
	//PB19 = RS
	*(U32 *) PTB_GIUS |= 0x00080000;
	*(U32 *) PTB_DDIR |= 0x00080000;	//output port
	*(U32 *) PTB_OCR2 |= 0x000000C0;

	if (level)
		*(U32 *) PTB_DR |= 0x00080000;
	else
		*(U32 *) PTB_DR &= ~0x00080000;

	return;
}


//
//      Enter Standby Mode
//
void standby_enable(void)
{
	//PB16 = standby
	//Active high
	*(U32 *) PTB_GIUS |= 0x00010000;
	*(U32 *) PTB_DDIR |= 0x00010000;	//output port
	*(U32 *) PTB_OCR2 |= 0x00000003;
	*(U32 *) PTB_DR |= 0x00010000;

	return;
}

void standby_disable(void)
{
	//PA16 = standby
	//Active high
	*(U32 *) PTB_GIUS |= 0x00010000;
	*(U32 *) PTB_DDIR |= 0x00010000;	//output port
	*(U32 *) PTB_OCR2 |= 0x00000003;
	*(U32 *) PTB_DR &= ~0x00010000;

	return;
}


//
//      Hard Reset
//
void sensor_reset(void)
{
	U32 i;

	//PB17 = reset
	//Active low
	*(U32 *) PTB_GIUS |= 0x00020000;
	*(U32 *) PTB_DDIR |= 0x00020000;	//output port
	*(U32 *) PTB_OCR2 |= 0x0000000C;
	//assert reset
	*(U32 *) PTB_DR &= ~0x00020000;
	//delay
	for (i = 0; i < 500000; i++);
	//negate reset
	*(U32 *) PTB_DR |= 0x00020000;

	return;
}


//
//      Auto-flickering Control
//
void RS_set_level(U32 level)
{
	//PB18 = RS
	*(U32 *) PTB_GIUS |= 0x00040000;
	*(U32 *) PTB_DDIR |= 0x00040000;	//output port
	*(U32 *) PTB_OCR2 |= 0x00000030;

	if (level)
		*(U32 *) PTB_DR |= 0x00040000;
	else
		*(U32 *) PTB_DR &= ~0x00040000;

	return;
}


//
//      VGA init (Landscape 640 x 480)
//
void IM8803_VGA_init(void)
{
	U32 data;

	//hard init
	standby_disable();
	sensor_reset();
	RS_set_level(0);	//set '0' for > 15fps

	//soft reset
	I2C_write(0x01, 0x0004);	//select IC register
	I2C_write(0x0D, 0x0001);	//reset IC
	I2C_write(0x0D, 0x0000);
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_write(0x07, 0x0001);	//reset IFP
	I2C_write(0x07, 0x0000);

	//read mode control
	I2C_write(0x01, 0x0004);	//select IC register
	I2C_write(0x20, 0xD0A1);	//read from top to bottom (rotate by 180 deg)

	//workaround for read mode control
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_write(0x37, 0x0100);	//fix for flickering

	//select RGB565 output
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_read(0x08, &data);
	data |= 0x1000;		//set bit 12
	I2C_write(0x08, data);

	return;
}


//
//      QVGA init (320 x 240)
//      Subsampliing by Sensor
//
void IM8803_QVGA_init(void)
{
	U32 data;

	//hard init
	standby_disable();
	sensor_reset();
	RS_set_level(0);	//set '0' for > 15fps

	//soft reset
	I2C_write(0x01, 0x0004);	//select IC register
	I2C_write(0x0D, 0x0001);	//reset IC
	I2C_write(0x0D, 0x0000);
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_write(0x07, 0x0001);	//reset IFP
	I2C_write(0x07, 0x0000);

	//decimation control
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_write(0x46, 0x0001);	//QVGA

	//read mode control
	I2C_write(0x01, 0x0004);	//select IC register
	I2C_write(0x20, 0xD0A1);	//read from top to bottom (rotate by 180 deg)

	//workaround for read mode control
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_write(0x37, 0x0100);	//fix for flickering

	//select RGB565 output
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_read(0x08, &data);
	data |= 0x1000;		//set bit 12
	I2C_write(0x08, data);

	return;
}


//
//      QQVGA init (160 x 120)
//      Subsampliing by Sensor
//
void IM8803_QQVGA_init(void)
{
	U32 data;

	//hard init
	standby_disable();
	sensor_reset();
	RS_set_level(0);	//set '0' for > 15fps

	//soft reset
	I2C_write(0x01, 0x0004);	//select IC register
	I2C_write(0x0D, 0x0001);	//reset IC
	I2C_write(0x0D, 0x0000);
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_write(0x07, 0x0001);	//reset IFP
	I2C_write(0x07, 0x0000);

	//decimation control
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_write(0x46, 0x0004);	//QQVGA

	//read mode control
	I2C_write(0x01, 0x0004);	//select IC register
	I2C_write(0x20, 0xD0A1);	//read from top to bottom (rotate by 180 deg)

	//workaround for read mode control
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_write(0x37, 0x0100);	//fix for flickering

	//select RGB565 output
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_read(0x08, &data);
	data |= 0x1000;		//set bit 12
	I2C_write(0x08, data);

	return;
}


//
//      QVGA init
//      (Portrait 240 x 320)
//
//      Window of interest by sensor
//      No subsampling
//
void IM8803_QVGA_init4(void)
{
	U32 data;

	//hard init
#ifdef MP3DSC
	standby_disable();
	sensor_reset();
	RS_set_level(0);	//set '0' for > 15fps
#endif
#ifdef ADS
	ADS_standby_disable();
	ADS_sensor_reset();
	ADS_RS_set_level(0);
#endif

	//soft reset
	I2C_write(0x01, 0x0004);	//select IC register
	I2C_write(0x0D, 0x0001);	//reset IC
	I2C_write(0x0D, 0x0000);
	I2C_write(0x01, 0x0001);	//select IFP register

//I2C_write(0x0A,0x4);
	I2C_write(0x07, 0x0001);	//reset IFP
//	I2C_write(0x07, 0x000A);	//reset IFP
	I2C_write(0x07, 0x0000);

	//Window of Interest (WOI) control
	I2C_write(0x01, 0x0004);	//select IC register
	I2C_write(0x02, 200);	//first col
	I2C_write(0x30, 20);	//first row
	I2C_write(0x04, 247);	//240 cols
	I2C_write(0x03, 327);	//320 rows

	//read mode control
	I2C_write(0x01, 0x0004);	//select IC register
	//I2C_write(0x20, 0xD0A1);      //read from top to bottom (rotate by 180 deg)
	I2C_write(0x20, 0x90A1);	//read from top to bottom (rotate by 180 deg)

	//workaround for read mode control
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_write(0x37, 0x0100);	//fix for flickering

	//select RGB565 output
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_read(0x08, &data);
	data |= 0x1000;		//set bit 12
	I2C_write(0x08, data);

	//change saturation to 150%
	/*I2C_write(0x01, 0x0001);      //select IFP register
	   I2C_read(0x25, &data);
	   data |= 0x2800;      //set bit 11-13: 101(150%)
	   I2C_write(0x25, data);
	 */

	//Red gain
#if 0
	//stop AWB
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_read(0x06, &data);
	data &= 0xFFFE;		//clear bit 1
	I2C_write(0x06, data);

	//stop AE
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_read(0x06, &data);
	data &= 0xBFFF;		//clear bit 14
	I2C_write(0x06, data);

	//double red gain
	I2C_write(0x01, 0x0004);	//select IC register
	I2C_read(0x2D, &data);
	data |= 0x20;		//set bit 12
	I2C_write(0x2D, data);
#endif

	//BTS settings
	I2C_write(0x01, 0x0001);	//select IFP register
	I2C_read(0x08, &data);
	data |= 0x01;		//clear bit 14
	I2C_write(0x08, data);

	return;
}