Firmware Integration Technology (FIT) simplifies embedding peripheral function module drivers and allows portability between RX microcontrollers, with the aim of reducing the burden of program development and software resource management in software development using the RX Family.

About FIT

Features of FIT

FIT lays out clear rules for sample code (middleware and drivers) provided for RX Family devices as follows.

  • MCU initial settings
  • How to define a target board
  • File configuration
  • Names of functions
  • Common interface with user application

Conventionally, the above information has in many cases varied by sample code, so changes needed to be made to sample code when embedding into a user application. With FIT, there are rules for this information, so each sample code can be embedded into a user application with ease. Also, the peripheral function drivers and middleware which support FIT have a common interface with user applications. This makes it easy to port user applications when migrating between RX microcontrollers.

FIT modules emphasize portability between RX family microcontrollers.

Easy Embedding to Project Generated by Integrated Development Environment

The e2 studio integrated development environment (IDE) which is based on the globally popular Eclipse open source IDE has a GUI (plug-in feature) for embedding FIT modules. Using this feature, FIT modules can be embedded with ease into projects generated in e2 studio. FIT modules also support CS+.

Configuration of FIT

FIT consists of a Board Support Package (BSP), peripheral function modules, and middleware modules.

Module that performs initial MCU settings, clock settings, board settings, and so on
Peripheral Function Modules
Drivers that control the peripheral functions of a RX microcontroller
Middleware Modules
Middleware function such as TCP/IP and file system

Using FIT modules helps ease development.

Advantages of FIT

1. Embed Peripheral Function Modules With Ease

Drivers and Middleware Supporting FIT

Peripheral function modules and middleware modules that support FIT operate in a common MCU basic setting (BSP).


Conventional Drivers and Middleware


2. Migrate Between RX Microcontrollers With Ease

Drivers and Middleware Suppoting FIT

Once FIT is supported, the APIs of peripheral driver modules and middleware modules have common specifications. The MCU can be switched easily to another MCU.


Conventional Driver and Middleware

Sample code and middleware which do not support FIT do not have a common API. Migrating between products takes many man-hours.


Obtaining the Product

Peripheral function modules and middleware modules that support FIT are included with the RX Driver Package. Please download the RX Driver Package.
FIT modules supported by device are listed in the  Device Group Support.

Implementing FIT

Please refer to the following before implementing FIT modules. We recommend using the Smart Configurator.

Application Note

Application Sample Code

Supported Devices Package Name Application and Downloads R Number English Version
RX113 File System, USB, LCDC On-chip Flash Memory Programming Solution using USB Memory 1.01
RX231 Capacitive Touch Sensing Unit, File System, USB On-chip Flash Memory Programming Solution using Built-in Capacitive Touch Sensing Unit and USB Memory 1.01
RX64M, RX71M Ethernet, TCP/IP, File System, USB, CMT, HTTP TCP/IP Protocol Stack Based Network Solution for Industrial Applications (Under development) 1.02
RX64M Ethernet, TCP/IP, File System, PDC, DMAC, SCI, CMT, HTTP Sensor solution which utilizes a camera 1.00
RX64M Ethernet, TCP/IP, File System, USB, PDC, SDHI, SSI, ADPCM, JPEG, IIC, DMAC, DTC, SCI, CMT, HTTP RX64M Group The camera function and The Sound Play Function Demonstration using the HMI expansion board RX Driver Package Application 1.00