i2c_cam.h

用AVR单片机来控制数字摄像头

/*
 * ----------------------------------------------------------------------------
 * Modification of the I2C Library by Joerg Wunsch for the I2c Bus of the
 * Omnivision Camera to read and write in the correct adresses for this camera
 * Added functuions:
 *
 * int read_register(int numResguiter)
 * int write_register(int numregister, int value)
 *
 * By I馻ki Navarro Oiza
 * March 2004
 * ----------------------------------------------------------------------------
 */



/*
 * ----------------------------------------------------------------------------
 * "THE BEER-WARE LICENSE" (Revision 42):
 * <[e-mail]> wrote this file.  As long as you retain this notice you
 * can do whatever you want with this stuff. If we meet some day, and you think
 * this stuff is worth it, you can buy me a beer in return.        Joerg Wunsch
 * ----------------------------------------------------------------------------
 */

/* $Id: twitest.c,v 1.1 2002/12/18 22:35:38 joerg_wunsch Exp $ */

/*
 * Simple demo program that talks to a 24Cxx I睠 EEPROM using the
 * builtin TWI interface of an ATmega device.
 */

/*
 * ---------------------------------------------------------------------------
 * The code modified and reorganized by Jaakko Ala-Paavola 2003/08/20 
 * [e-mail]
 * ---------------------------------------------------------------------------
 */

#ifndef _EE24XX__
#define _EE24XX_

#include <avr/io.h>
#include <avr/twi.h>
#include <inttypes.h>

#ifndef UCSRB
# ifdef UCSR1A          /* ATmega128 */
#  define UCSRA UCSR1A
#  define UCSRB UCSR1B
#  define UBRR UBRR1L
#  define UDR UDR1
# else /* ATmega8 */
#  define UCSRA USR
#  define UCSRB UCR
# endif
#endif
#ifndef UBRR
#  define UBRR UBRRL
#endif

#define TWI_SLA_CAM   0xc0  //Cam C0    sensor 90
#define MAX_ITER        200
#define PAGE_SIZE       8 // before 8

void 
i2c_init(int clk);


int
i2c_read_bytes(uint16_t eeaddr, int len, uint8_t *buf);

int
i2c_write_page(uint16_t eeaddr, int len, uint8_t *buf);

int
i2c_write_bytes(uint16_t eeaddr, int len, uint8_t *buf);

int
write_register(uint16_t numregister, uint8_t value);

int
read_register(uint16_t numregister);



#endif