ctrl_access.c

应用AT89C5131A单片机

//! @file ctrl_access.c,v
//!
//! Copyright (c) 2004-Atmel.
//!
//! Please read file license.txt for copyright notice.
//!
//! @brief This file contains the interface :
//! - between USB <-> MEMORY
//! OR
//! - between USB <- Access Memory Ctrl -> Memory
//!
//! This interface may be controled by a "Access Memory Control" for :
//! - include a management of write protect global or specific
//! - include a management of transfer (ex: DFC on Qundau product)
//! - include a management of access password
//! - ...
//!
//! @version 1.1 c5131-mass-storage-virtual-1_0_6 $Id: ctrl_access.c,v 1.1 2005/03/10 08:29:48 lguilhau Exp $
//!
//! @todo
//! @bug

//_____ I N C L U D E S ____________________________________________________

#include "config.h"
#include "ctrl_access.h"


//_____ D E F I N I T I O N S ______________________________________________


//! Computed the maximum of static lun (don't add the lun of Mass Storage in mode USB Host)
// FYC: Memory = Logical Unit



               // CHECK FOR LUN DEFINE
#ifndef  LUN_0
   #  error LUN_0 must be defined with ENABLE or DISABLE in conf_access.h
#endif
#ifndef  LUN_1
   #  error LUN_1 must be defined with ENABLE or DISABLE in conf_access.h
#endif
#ifndef  LUN_2
   #  error LUN_2 must be defined with ENABLE or DISABLE in conf_access.h
#endif
#ifndef  LUN_3
   #  error LUN_3 must be defined with ENABLE or DISABLE in conf_access.h
#endif
#ifndef  LUN_4
   #  error LUN_4 must be defined with ENABLE or DISABLE in conf_access.h
#endif
#ifndef  LUN_5
   #  error LUN_5 must be defined with ENABLE or DISABLE in conf_access.h
#endif
#ifndef  LUN_6
   #  error LUN_6 must be defined with ENABLE or DISABLE in conf_access.h
#endif
#ifndef  LUN_7
   #  error LUN_7 must be defined with ENABLE or DISABLE in conf_access.h
#endif


#if (LUN_0 == ENABLE)
   #define     LUN_0_EN   1
   #else
   #define   LUN_0_EN   0
#endif
#if (LUN_1 == ENABLE)
   #define     LUN_1_EN   1
   #else
   #define     LUN_1_EN   0
#endif
#if (LUN_2 == ENABLE)
   #define     LUN_2_EN   1
   #else
   #define     LUN_2_EN   0
#endif
#if (LUN_3 == ENABLE)
   #define     LUN_3_EN   1
   #else
   #define     LUN_3_EN   0
#endif
#if (LUN_4 == ENABLE)
   #define     LUN_4_EN   1
   #else
   #define     LUN_4_EN   0
#endif
#if (LUN_5 == ENABLE)
   #define     LUN_5_EN   1
   #else
   #define     LUN_5_EN   0
#endif
#if (LUN_6 == ENABLE)
   #define     LUN_6_EN   1
   #else
   #define     LUN_6_EN   0
#endif
#if (LUN_7 == ENABLE)
   #define     LUN_7_EN   1
   #else
   #define     LUN_7_EN   0
#endif


#define  LUN_ID_0        (0)
#define  LUN_ID_1        (LUN_0_EN)
#define  LUN_ID_2        (LUN_0_EN+LUN_1_EN)
#define  LUN_ID_3        (LUN_0_EN+LUN_1_EN+LUN_2_EN)
#define  LUN_ID_4        (LUN_0_EN+LUN_1_EN+LUN_2_EN+LUN_3_EN)
#define  LUN_ID_5        (LUN_0_EN+LUN_1_EN+LUN_2_EN+LUN_3_EN+LUN_4_EN)
#define  LUN_ID_6        (LUN_0_EN+LUN_1_EN+LUN_2_EN+LUN_3_EN+LUN_4_EN+LUN_5_EN)
#define  LUN_ID_7        (LUN_0_EN+LUN_1_EN+LUN_2_EN+LUN_3_EN+LUN_4_EN+LUN_5_EN+LUN_6_EN)
#define  MAX_LUN         (LUN_0_EN+LUN_1_EN+LUN_2_EN+LUN_3_EN+LUN_4_EN+LUN_5_EN+LUN_6_EN+LUN_7_EN)

// Check configuration
#if (MAX_LUN == 0)
   #error No memory is active in conf_access.h
#endif

// Write protect variable
#if (GLOBAL_WR_PROTECT == ENABLED)
   static U8 g_u8_wr_protect;
#endif


//_____ D E F I N I T I O N S __ F O N C T I O N S _________________________


//! This fonction return the number of logical unit
//!
//! @return U8   number of logical unit in the system
//!
U8    get_nb_lun()
{
   return   MAX_LUN;
}


//! This fonction return the current logical unit
//!
//! @return U8   number of logical unit in the system
//!
U8    get_cur_lun()
{
   return   0; //TODO
}


//! This fonction test the state of memory, and start the initialisation of the memory
//!
//! MORE (see SPC-3