Category Archives: FatFs

Open Source FAT (File Allocation Table) file system.

How to get Data off an Embedded System: FatFS with USB MSD Host and FreeRTOS Direct Task Notification

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This is a follow-up article of my earlier project presented in “FatFS, MinIni, Shell and FreeRTOS for the NXP K22FN512“. I wanted to extend it with a USB MSD (memory stick) device: The USB storage device gets automatically mounted, and depending on a configuration (.ini) file on the memory device I can perform various actions, for example automatically copy data from the SD card to the USB device. For example the system logs data, and to get the data I insert the memory stick, it copies the data on it and automatically unmounts it, and I can remove the memory stick.

FRDM-K22F USB Host Mode with Memory Sticks

FRDM-K22F USB Host Mode with Memory Sticks

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McuLog: Logging Framework for small Embedded Microcontroller Systems

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An essential tool especially developing larger applications or distributed firmware is to use logging. This article presents an open source logging framework I’m using. It is small and easy to use and can log to a console, to a file on the host or even to a file on an embedded file system as FatFS.

Log Output

Log Output

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FatFS, MinIni, Shell and FreeRTOS for the NXP K22FN512

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I’m using the NXP Kinetis K22FN512 in many projects, either with the FRDM-K22F or on the tinyK22: with 120 MHz, 512 KByte FLASH and 128 KByte it has plenty of horsepower for many projects. The other positive thing is that it is supported by the NXP MCUXpresso IDE and SDK. I have now created an example which can be used as base for your own project, featuring FreeRTOS, FatFS, MinIni and a command line shell.

FRDM-K22F with SD Card

FRDM-K22F with SD Card

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Playing Zork with FreeRTOS on ARM in three different Ways

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You might wonder what ‘Zork‘ is? Zork is one of the first and earlist fictive computer games, written around 1977 and 1979, written in MDL on a DEC PDP-10 by members of the MIT Dynamic Modelling group (see https://en.wikipedia.org/wiki/Zork). I believe the first time I have played Zork was around 1984 on a Commodore 64.

Zork

Zork

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McuOnEclipse Components: 25-Sept-2017 Release

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I’m pleased to announce that a new release of the McuOnEclipse components is available in SourceForge. In this release more ARM Cortex devices/vendors are supported with different SDKs, plus it comes with several FreeRTOS enhancements for debugging highly optimized code.

SourceForge

SourceForge

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McuOnEclipse Components: 31-July-2016 Release

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Time for a new major update of the McuOnEclipse components, with the fillowing main features and changes:

  • FatFS component updated to R0.12 with patch 3 and exFAT support
  • Extended support for Cortex-M7
  • Extended support for Kinetis SDK V2.0
  • USB component support for Kinetis SDK V1.3
  • Improved FreeRTOS for NXP FreeRTOS TAD plugin
  • Added C++ wrappers to multiple components
  • Many smaller fixes and improvements

    SourceForge

    SourceForge

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FatFS with Adafruit MicroSD Breakout Board and NXP FRDM-KL25Z

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Breakout boards are great: they allow me to explore functions quickly, without to build my custom board: all what I need is some wires and ideally a bread board.

Adadfruit MicroSD Card Breakout Board

Adadfruit MicroSD Card Breakout Board

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McuOnEclipse Components: 25-June-2016 Release

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SourceForge

SourceForge

A new release is available on SourceForge, with the following main changes:

  • Support for FreeRTOS and Cortex-M7
  • Segger SystemView updated to V2.38
  • Components for NXP Kinetis SDK V1.3
  • Fixed bug in Wait component (register handling for GCC and ARM)
  • FatFS supports FreeRTOS V9.0.0 with static memory allocation
  • FreeRTOS shell and task list with static memory allocation
  • Floating point conversion routines in Utility
  • FreeRTOS component shows NVIC mask bits

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McuOnEclipse Components: 29-May-2016 Release

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Major changes in this new release:

  • FreeRTOS V9.0.0 with static memory allocation.
  • Shell with single character I/O function.
  • FatFS File System with extra shell commands for memory dump and file creation.
  • Segger SystemViewer library updated to V2.36a
Segger SystemViewer V2.36a

Segger SystemViewer V2.36a

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FRDM K64F Data Logger using FatFs with KSDK 1.2.0

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Check out the article by Wesley Hunter about how to use the FRDM-K64F as a data logger. He describes all the steps how to use the Kinetis SDK v1.2.0 with FatFS.

Happy Logging 🙂

Centaurian

This blog is a guide on how to setup using the FatFs library included with the Kinetis SDK 1.2.0 using mostly the Processor expert within Eclipse Luna. FatFs is a generic FAT file system module for small embedded systems written by Chan. I prefer to use Processor Expert when possible as this will often generate code that is smaller in size than using the KSDK library files direct. I experienced many gotcha’s and complication setting this up and wanted to share how I finally managed to get it to work.

  1. Prerequisites
  2. Create New Project
  3. Open Processor Expert
  4. Add SD card component
  5. Add Init_Port component
  6. Add GPIO component
  7. Configure the clock
  8. Import FatFs
  9. Add Card detection code
  10. FAT file appender function
  11. Disable the MPU

Prerequisites

Before you begin please make sure your development environment is setup and you can already compile and debug code using KSDK 1.2.0 on Eclipse Luna…

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