/* ---------------------------------------------------------------------------
 * bus.h - v0.1                                         (c) 2007 Micro-key bv
 * ---------------------------------------------------------------------------
 * Micro-key bv
 * Industrieweg 28, 9804 TG Noordhorn
 * Postbus 92, 9800 AB Zuidhorn
 * The Netherlands
 * Tel: +31 594 503020
 * Fax: +31 594 505825
 * Email: support@microkey.nl
 * Web: www.microkey.nl
 * ---------------------------------------------------------------------------
 * Description: RS485 interface.
 * ---------------------------------------------------------------------------
 * Version(s):  0.1, 10-09-2007, Marcel Mulder.
 *                   Creation.
 * ---------------------------------------------------------------------------
 */
#ifndef __BUS_H__
#define __BUS_H__

/** \file bus.h 
    \brief RS485 (UART) interface. 
*/
/* ---------------------------------------------------------------------------
 * System include files.
 * ---------------------------------------------------------------------------
 */
#include "BpPort.h"

/* ---------------------------------------------------------------------------
 * Application include files.
 * ---------------------------------------------------------------------------
 */

/* ---------------------------------------------------------------------------
 * Constant and macro definitions.
 * ---------------------------------------------------------------------------
 */

/* ---------------------------------------------------------------------------
 * Type definitions.
 * ---------------------------------------------------------------------------
 */
typedef enum
{
  BUS1, /**< First RS485 port*/ 
  BUS2  /**< Second RS485 port*/ 
} t_bus_devices;

/* ---------------------------------------------------------------------------
 * Variable declarations.
 * ---------------------------------------------------------------------------
 */
int bus1Handle;
int bus2Handle;

/* ---------------------------------------------------------------------------
 * Function declarations.
 * ---------------------------------------------------------------------------
 */
/** \brief Initialize of serial bus interface.*/   
void   busInit (
  t_bus_devices device
);

/** \brief Write data of a certain length to a serial bus.*/  
void   busWrite (
  t_bus_devices device, 
  UINT16 length, /**< Lengh of data in bytes */ 
  UINT8 * data   /**< Pointer to data */
);

/** \brief Reads data from serial bus.
    \retval Lengt of received data in bytes*/  
UINT16 busRead (
  t_bus_devices device, 
  UINT8 * data /**< Pointer to data */
);

/** \brief Get byte from serial bus.
    \retval bool Returns true if there was data */
BOOLEAN busGet(
  t_bus_devices device,
  UINT8 * byte /**< Pointer to byte to return data*/
);

/** \brief Send byte to serial bus. */
void busPut(
  t_bus_devices device, 
  UINT8 value /**< Byte to send*/
);

/** \brief Flush serial bus buffers. */
void busFlush(
  t_bus_devices device
);

/** \brief Check if receive buffers is empty.
    \retval bool Returns true if recieve buffer is empty 
*/
BOOLEAN busEmpty(
  t_bus_devices device
);

#endif /* __BUS_H__ */