FAT File System [M3S-TFAT-Tiny] for the RX Family
Overview
Open Source FAT File System
M3S-TFAT-Tiny (TFAT) is a FAT file system that only requires a small amount of memory. This is based on open source FatFs . In addition, this is also Firmware Integration Technology (FIT) and can be combined with other FIT modules.
Renesas has various MCUs, including the RX Family, that are suitable for use in applications such as single-function home appliances and compact industrial equipment, where the incorporation of more sophisticated functionality or the newest technology, with a negligible increase in cost, is desired. To support such development activities, Renesas offers software libraries with only the essential features for application, at low cost.
Use TFAT in any device incorporating a target microcontroller for functions such as accumulating measured or archived data, or rewriting a stored program via memory card. Although TFAT is a FAT file system, and PC data exchange capability enable analysis and management of data by a PC application.
TFAT supports various types of memory devices. The supplied sample programs include sample software for reading/writing files to SD Memory card and USB Flash drive on the CPU board which comes with the Renesas Starter Kit.
Topics
TFAT for RX family V.4.01 (FatFs R0.13c) supports new memory storages, eMMC and Serial Flash memory. You can also use format feature for eMMC and Serial Flash memory with TFAT (excluded SD memory card and USB memory).
Release Information
| Target Device | Software Name | Version/Release Date | Status |
|---|---|---|---|
| RX Family | M3S-TFAT-Tiny for the RX Family | Latest Version: V.4.01 Released: Jul. 27, 2020 |
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Features
- Compact design tailored for embedded systems
Realizable using the internal memory of the microcontroller
Approx. 8.9KB ROM and approx. 900B RAM (for the RX Family) - Supported CC-RX, IAR and GCC compilers
- Supported both of none RTOS and RTOS (FreeRTOS and RI600V4)
Components
- File system software
- Sample program that supports Renesas integrated development environment.
- API function user's manual and other documents in a complete set
Modular Composition
Functions
| Function Name | Description |
|---|---|
| f_mount | Mounts a volume |
| f_open | Opens a file |
| f_close | Closes a file |
| f_read | Reads from a file |
| f_write | Writes to a file |
| f_lseek | Moves the read/write pointer |
| f_truncate | Truncates a file |
| f_sync | Flushes the cache |
| f_opendir | Opens a directory |
| f_readdir | Reads a directory |
| f_getfree | Gets free area |
| f_stat | Gets file status |
| f_mkdir | Makes a directory |
| f_unlink | Deletes a file or a directory |
| f_rename | Renames or moves a file or a directory |
| f_tell | Get current read/write pointer |
| f_eof | Test for end-of-file |
| f_size | Get file size |
| f_error | Test for an error |
| f_mkfs | Format a volume as FAT file system |
| disk_initialize | Initializes a drive Note |
| disk_read | Reads from a drive Note |
| disk_write | Writes to a drive Note |
| disk_ioctl | Controls drive I/O Note |
| disk_status | Gets drive status Note |
| get_fattime | Gets date and time Note |
Note
The TFAT module is not designed for use with a specific piece of hardware and therefore does not include these functions (drivers). In fact, the M3S-TFAT-Tiny memory driver interface module Firmware Integration Technology (TFAT driver FIT) includes these functions.
Operating Environment
| Target Device | RX Family |
|---|---|
| Applicable Compiler |
|
| Occupied ROM Size | Approx. 8.9KB |
| Occupied RAM Size | Approx. 0.9KB *including the stack |
Purpose
Examples of application field:
- Data preservation and data logging in various types of equipment
- Preservation of number of revolutions, temperature and other data in industrial equipment
- Preservation of a history of operations and settings alteration for remote equipment failure diagnostic
- Preservation of personal information in health equipment and similar other equipment used individually
- Preservation of heart rate and blood pressure data in health equipment
- Preservation of physical exercise data in training equipment
- Updating of programs and data in various types of equipment
- Flash memory rewriting with programs or data stored in a memory card in places where equipment is installed
Development Tools Support
| Title | Description |
|---|---|
| My Renesas | Create a My Renesas account to use our tool download services, receive e-newsletter/update notifications and take advantage of our other services. |
| e-learning | Information for studying and learning about microcontrollers and microprocessors. |
| FAQ | Frequently asked questions and useful hints for development. |
| Forum | A forum and community site to share technical information, questions and opinions with others who use Renesas MCUs. |
| Tool News | Tool release information and other important information. |
| Operating Environment | Information on system requirements and operating environment for the latest version of the tools. |
| Information on Discontinued Products | A list of Renesas software and tools that have been discontinued and are no longer being offered for new projects. |