ctrl_access.c

基于at90usb1287的数据存储器例子

//! @file ctrl_access.c
//!
//! Copyright (c) 2004
//!
//! 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 access password
//! - ...
//!
//! @version 1.1 (c5131-mass-storage-virtual-1_0_4)
//!
//! @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 ______________________________________________

#if (ACCESS_MEM_TO_MEM == ENABLED)
   #include "modules/file_system/fat.h"
   U8 buf_sector[FS_SIZE_OF_SECTOR];
#endif


//! 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
#ifndef  LUN_USB
   #  error LUN_USB must be defined with ENABLE or DISABLE in conf_access.h
#endif



#if (LUN_0 == ENABLE)
   #define     LUN_0_EN   1
   U8 code  lun0_name[]=LUN_0_NAME;
   #else
   #define   LUN_0_EN   0
#endif
#if (LUN_1 == ENABLE)
   #define     LUN_1_EN   1
   U8 code  lun1_name[]=LUN_1_NAME;
   #else
   #define     LUN_1_EN   0
#endif
#if (LUN_2 == ENABLE)
   #define     LUN_2_EN   1
   U8 code  lun2_name[]=LUN_2_NAME;
   #else
   #define     LUN_2_EN   0
#endif
#if (LUN_3 == ENABLE)
   #define     LUN_3_EN   1
   U8 code  lun3_name[]=LUN_3_NAME;
   #else
   #define     LUN_3_EN   0
#endif
#if (LUN_4 == ENABLE)
   #define     LUN_4_EN   1
   U8 code  lun4_name[]=LUN_4_NAME;
   #else
   #define     LUN_4_EN   0
#endif
#if (LUN_5 == ENABLE)
   #define     LUN_5_EN   1
   U8 code  lun5_name[]=LUN_5_NAME;
   #else
   #define     LUN_5_EN   0
#endif
#if (LUN_6 == ENABLE)
   #define     LUN_6_EN   1
   U8 code  lun6_name[]=LUN_6_NAME;
   #else
   #define     LUN_6_EN   0
#endif
#if (LUN_7 == ENABLE)
   #define     LUN_7_EN   1
   U8 code  lun7_name[]=LUN_7_NAME;
   #else
   #define     LUN_7_EN   0
#endif
#if (LUN_USB == ENABLE)
   #define     LUN_USB_EN   1
   U8 code  lunusb_name[]=LUN_USB_NAME;
   #else
   #define     LUN_USB_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)
#define  LUN_ID_USB      (MAX_LUN)

// 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()
{
#if   (MEM_USB == ENABLED)
   return   (MAX_LUN + Host_getlun());
#else
   return   MAX_LUN;
#endif
}


//! 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