Zilog EZ80F91AZA Manual do Utilizador descarregar pdf (Página 13)

UM017914-1211 Zilog File System Overview

Zilog File System

User Manual

The Zilog File System directory contains a common directory for all target processors.

Figure 1 displays the following four subdirectories of the Zilog File System:

ZTPX.Y.Z_Lib\RZK\Inc. This directory contains the header files that must be included in

the user application.

ZTPX.Y.Z_Lib\RZK\Lib. This directory contains the NOFS.obj stub file (for the ZDS II

development environment) that must be included if Zilog File System support is not

required in the system, even though the system uses the Zilog File System APIs.

ZTPX.Y.Z_Lib\RZK\Conf. This directory contains the ZFS_Conf.c file that describes the

configuration of the Zilog File System. This file must be included in the application proj-

ect workspace to interoperate with the Zilog File System.

ZTPX.Y.Z_Lib\RZK\SamplePrograms\FS. This directory contains sample programs writ-

ten for the Zilog File System. One such sample program is the

FSShell program, which

is an interactive shell application that showcases different operations performed by the

Zilog File System. Only a few commands are provided in the

FSShell application. For

detailed information about the

FSShell application shell commands, refer to the readme

file present in the following directory:

<ZDS II Installed directory>\Program Files\Zilog\

ZDSII_eZ80Acclaim!_A.B.C\ZTP\ZTPX.Y.Z_Lib\RZK\SamplePrograms\FS\

FSShell

The above directory also contains all of the sample programs associated with the RZK

release.

The name of the four subdirectories listed above is the same for every target eZ80 micro-

processor or microcontroller.

Use Model

The Zilog File System is provided as a library and interfaces to the file system via well-

known APIs. The Zilog File System provides you with these APIs; however, you must call

the appropriate API to obtain service from the file system. The

ZFSInit API must be

called before performing any file- or directory-related operations on the volume.

ZFSInit() must be called in a thread body and not in the main() function.

The code segment below provides an example of Zilog File System calls, from the initial-

ization of the file system to calling an API.

void AppThreadEntry(void)

{

ZFS_STATUS_t status;

int cnt;

int ctr;

PZFS_VOL_PARAMS_t pvol_params, ptmp_vol;

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