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Freescale MQX Release Notes

6 Freescale Semiconductor

3 Last Version Highlights

This is the MQX RTOS release done by Freescale Semiconductor, targeting the MCF522xx

ColdFire family of microcontrollers. It is based on the version 2.50 as it was released by the

company ARC International. Freescale MQX™ RTOS contains also other core system components

like RTCS network stack, MFS file system and USB host drivers which used to be released and sold

separately by ARC.

In addition to changed directory structure, the Freescale release also brings a new way of how user

configures the kernel components before compiling. See more details in sections below.

3.1 MQX RTOS PSP

This version of Freescale MQX™ RTOS contains ColdFire Platform Support Package only. Support

for PowerPC platform and other Freescale processor platforms is planned for future releases.

The major PSP modifications as compared to the ARC release:

‐ The compile-time configuration of the MQX PSP (as well as all the other MQX components)

is now accomplished by editing the .../config/<board>/user_config.h file. In the

previous versions, the user configuration macros were passed to the build process on a

command line by the makefile or CodeWarrior prefix file.

‐ The PSP is configured and built for specific board. Originally, the PSP component was built

once for the particular device. While the PSP code still remains board-independent, this

feature enables finer kernel tuning for a specific board.

‐ MQX now supports typed memory, which allows additional information to be displayed in the

Task Aware Debugger Plugin.

3.2 MQX RTOS BSPs

This release includes Board Support Package for boards mentioned below. In addition to the board

initialization code, BSPs contain I/O drivers suitable for each of the boards. The following list gives

an overview about supported drivers:

All boards:

‐ TFS – Trivial Filesystem – tiny filesystem which can be used as a simple read-only file

repository instead of fully featured MFS. TFS is not installed in BSP startup code. It is a task

for the application to initialize the TFS and pass a pointer to the filesystem image data. The

mktfs tool is available (both as executable and PERL script) to generate the image from the

existing directory structure. The RTCS HTTP example demonstrates use of TFS.

‐ I2C I/O Driver – This driver supports a polled I2C interface in master mode. If enabled in

user configuration the I2C device drivers are installed during the BSP startup code as “i2c0:”

and “i2c1:”. Example application is provided in the MQX source tree.

‐ QSPI I/O Driver – This driver supports a polled QSPI interface in master mode. If enabled in

user configuration the QSPI device drivers is installed during the BSP startup code as

“qspi:”. Example application is provided in the MQX source tree.

‐ FlexCAN Driver – This driver provides a C language API to the FlexCAN peripheral module.

It is not a true I/O driver as defined by MQX terminology. Example application is provided in

the MQX source tree.

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