AN0366 datasheet(11/12 Pages) ZILOG

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AN036602-1013

Porting RZK/ZTP Applications to the eZ80L925148MODG Module

Application Note

IntFlash_IP_Write,

IntFlash_IP_Erase,

IntFlash_IP_Close

};

#endif

Optional ZFS Configuration

RZK/ZTP applications that use the Zilog File System (ZFS) can optionally modify the

ZFS configuration file to allocate more, or less, Flash memory to ZFS. The default settings

of the ZFS_Conf_eZ80L925148MODG.c file are listed below.

#define ZFS_TOTAL_NUM_BLOCKS ( 32 )

#define ZFS_TOTAL_NUM_SECTORS( 0x200000/ZFS_SEC_SIZE )

#define ZFS_TOTAL_NUM_VOLUMES( 1 )

#define ZFS_MAX_FILE_OPEN_COUNT( 20 )

#define ZFS_MAX_DIRS_SUPPORTED( 50 )

#define ERASE_FLASH( 0 )

ZFS_CONFIG_t g_zfs_cfg[ ZFS_TOTAL_NUM_VOLUMES ] =

{

"EXTF",

// vol name

ZFS_EXT_FLASH_DEV_TYPE,

// vol type

(UINT8*)0x300000,

// vol_start_addr

0x200000,

// vol_size

ZFS_TOTAL_NUM_BLOCKS,

// vol_blocks

ZFS_TOTAL_NUM_SECTORS,

// number of sectors

FS_AM29LV160_Init,

FS_AM29LV160_Read,

FS_AM29LV160_Write,

FS_AM29LV160_Erase,

FS_AM29LV160_Close

};

These settings will configure the ZFS to use 2MB of CS0 Flash from addresses 0x300000

to 0x4FFFFF for the ZFS. In total, 32 Flash erase blocks (each 64KB in size) are allocated

to the ZFS giving a volume size of 0x200000 bytes. Source code to the Flash driver used

to read and write data to this volume is contained in the AM29LV160_Driver.c file.

The AM29LV160_Driver.c file (and other ZFS Flash driver files) is modified in the ZTP

2.4.2 release to explicitly disable interrupts while modifying the contents of Flash. This

modification is necessary to ensure that an interrupt does not cause a higher-priority thread

to start running from external Flash or attempt to read data from external Flash while it is

being programmed or erased.

Note:

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