/***************************************************************************
                          octopus.h  -  description
                             -------------------
    begin                : Fri Apr 1 2007
    copyright            : (C) 2007 by Embedded Projects
    email                : sauter@embedded-projects.net
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Lesser General Public License           *
 *   version 2.1 as published by the Free Software Foundation;             *
 *                                                                         *
 ***************************************************************************/

#ifndef __liboctopus_h__
#define __liboctopus_h__

#include <usb.h>


#define VID 0x1781
#define PID 0x0c65

/**
  \brief Main context structure for all liboctopus functions.

 Do not access directly if possible.
*/
struct octopus_context {
   // USB specific
   /// libusb's usb_dev_handle
   struct usb_dev_handle *usb_handle;

   /// String representation of last error
   char *error_str;
};

/**
    \brief list of usb devices created by octopus_usb_find_all()
*/
struct octopus_device_list {
   /// pointer to next entry
   struct octopus_device_list *next;
   /// pointer to libusb's usb_device
   struct usb_device *dev;
};

#ifdef __cplusplus
extern "C" {
#endif

   int octopus_init(struct octopus_context *octopus);

   int octopus_open(struct octopus_context *octopus);
   int octopus_open_id(struct octopus_context *octopus, int vendor, int product);
   int octopus_open_serial(struct octopus_context *octopus, char * serial);

   int octopus_open_dev(struct octopus_context *octopus, struct usb_device *dev);

   int octopus_close(struct octopus_context *octopus);

   int octopus_message(struct  octopus_context *octopus, char *msg,
	       int msglen, char *answer, int answerlen);

   char * octopus_get_hwdesc(struct octopus_context *octopus, char *desc);

   /// part: IO

   int octopus_io_init(struct octopus_context *octopus, int pin);
   int octopus_io_init_port(struct octopus_context *octopus, int port);

   int octopus_io_set_port_direction_out(struct octopus_context *octopus, 
                                        int port,unsigned char mask);
   int octopus_io_set_port_direction_in(struct octopus_context *octopus, 
                                       int port, unsigned char mask);
   int octopus_io_set_port_direction_tri(struct octopus_context *octopus, 
                                        int port, unsigned char mask);

   int octopus_io_set_pin_direction_out(struct octopus_context *octopus, int pin);
   int octopus_io_set_pin_direction_in(struct octopus_context *octopus, int pin);
   //int octopus_io_set_pin_direction_in_pullup(struct octopus_context *octopus, int pin);
   int octopus_io_set_pin_direction_tri(struct octopus_context *octopus, int pin);

   unsigned char octopus_io_get_port(struct octopus_context *octopus, int port);

   int octopus_io_set_port(struct octopus_context *octopus, int port, unsigned char value);

   int octopus_io_set_pin(struct octopus_context *octopus, int pin, int value);	//buffered

   int octopus_io_get_pin(struct octopus_context *octopus, int pin);

   /// part: adc

   int octopus_adc_init(struct octopus_context *octopus, int pin);
   int octopus_adc_get(struct octopus_context *octopus, int pin);
   int octopus_adc_ref(struct octopus_context *octopus, int ref); 
   // 1= extern AREF, 2 = AVCC as reference, 3=intern voltage


   /// part: I2C
   int octopus_i2c_init(struct octopus_context *octopus);
   int octopus_i2c_deinit(struct octopus_context *octopus);

   int octopus_i2c_set_bitrate(struct octopus_context *octopus, int bitrate);
   int octopus_i2c_send_byte(struct octopus_context *octopus, char data);
   int octopus_i2c_send_bytes(struct octopus_context *octopus, char *buf, int len);
   unsigned char octopus_i2c_receive_byte(struct octopus_context *octopus, int address,int timeout);
   int octopus_i2c_receive_bytes(struct octopus_context *octopus, int address,char *buf, int len, int timeout);

   int octopus_i2c_send_start(struct octopus_context *octopus);
   int octopus_i2c_send_stop(struct octopus_context *octopus);

   /// part: SPI
   int octopus_spi_init(struct octopus_context *octopus);
   int octopus_spi_deinit(struct octopus_context *octopus);

   int octopus_spi_speed(struct octopus_context *octopus, int speed);
   int octopus_spi_send(struct octopus_context *octopus, unsigned char * buf, int length);
   int octopus_spi_recv(struct octopus_context *octopus, unsigned char * buf, int length);
   int octopus_spi_send_and_recv(struct octopus_context *octopus, unsigned char * buf, int length);

   /// part:  Flash 93c46
   int octopus_93c46_init(struct octopus_context *octopus);
   int octopus_93c46_deinit(struct octopus_context *octopus);

   int octopus_93c46_read(struct octopus_context *octopus, unsigned char address, int length, unsigned char * buf);
   int octopus_93c46_write(struct octopus_context *octopus, unsigned char address, int length, unsigned char * buf);

   /// part:  PWM
   int octopus_pwm_init(struct octopus_context *octopus, int pin);
   int octopus_pwm_deinit(struct octopus_context *octopus, int pin);
   int octopus_pwm_speed(struct octopus_context *octopus, int pin, int speed);
   int octopus_pwm_value(struct octopus_context *octopus, int pin, unsigned char value);

#ifdef __cplusplus
}
#endif

#endif /* __liboctopus_h__ */