Category Archives: gcc

DIY Free Toolchain for Kinetis: Part 6 – Linux Host with OpenOCD and CMSIS-DAP

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For everyone who wants to build a Do-It-Yourself toolchain for Kinetis on Linux, I recommend to read the following excellent post by Karibe:

Setting up Linux opensource build and debug tools for freescale freedom board FRDM-KL25Z

He describes how to get OpenOCD with CMSIS-DAP working with Eclipse on Ubuntu to debug the FRDM-KL25Z board.

List of Tutorials

Happy Linuxing 🙂

DIY Free Toolchain for Kinetis: Part 5 – FreeRTOS Eclipse Kernel Awareness with GDB

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So far I have covered in this tutorial series how to install ARM GNU gcc, adding Eclipse, followed by adding GNU GDB debugger, and then adding Processor Expert. I’m using FreeRTOS a lot in my projects, and luckily there is a Kernel Awareness Plugin available for FreeRTOS for GDB in Eclipse. This tutorial is about how to install and use it.

Queues and Tasks

Queues and Tasks

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DIY Free Toolchain for Kinetis: Part 1 – GNU ARM Build Tools

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This is the first part of a multi-part tutorial on setting up a free and functional GNU gcc + Eclipse + debugger environment for use with the Freescale FRDM-KL25Z board.

List of Tutorials

In this first part, I’m showing how to install the GNU ARM tool chain to build a ‘blinking LED’ application for the FRDM-KL25Z. With 100% free tools 😉

Blinking Red RGB LED made with free tools

Blinking Red RGB LED made with free tools

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Traps and Pitfalls: No Hex/Bin/S19 File Created with GNU?

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I stumbled now twice over a problem, and only after a lot of head scratching (you should see my head now 😉 ) I have found the cause (and solution) for it. In the hope that I can save the readers of this blog some time, here is what happened.

I described in earlier posts how to enable GNU build tools to generate hex/bin/S19 files, or to write the code size to the console view. That works fine for me. But then I received a project were obviously this does not work: even with the project settings configured properly, there is no S19 file, and no code size printed. What’s wrong?

Additional Tools in ARM GNU Eclipse Panel

Additional Tools in ARM GNU Eclipse Panel

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Review of CodeWarrior for MCU10.4

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Freescale has released this week an updated version of CodeWarrior: version 10.4. I’m usually not switching a tools version in the middle of a university semester. Unless I see a real benefit, and the risk is low. Well, I have used it now for a few days, and I have decided to move my projects from 10.3 to 10.4. Why? Read on…

CW for MCU10.4

CW for MCU10.4

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Red Suite 5: Eclipse Juno, Processor Expert and unlimited FRDM-KL25Z

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❗ UPDATE: Code Red Technologies have been acquired May 1st 2013 by NXP, see this press release. According to this, they will not continue to support non-NXP architectures after May 2014. 😦

You probably know this already: I’m a fan of Eclipse, Processor Expert and the Freedom board. As for tool chains I use CodeWarrior for MCU10.x (Eclipse based, 64 KByte free limit) and IAR (32 KByte limit) with the Processor Expert Driver Suite.

And I have added a new Eclipse based solution: Red Suite 5 from Code Red Technologies. They released a new Red Suite 5 (v5.2.2 build 2108) which caught my attention when reading the release notes:

  1. Eclipse Juno SR2: New Eclipse Look & Feel 🙂
  2. Added integration for Processor Expert 🙂 🙂
  3. Non-expiring 128k (!!!) limit when used with the Freescale FRDM boards 🙂 🙂 🙂
Red Suite 5 Eclipse Startup

Red Suite 5 Eclipse Startup

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printf() with the FRDM-KL25Z Board and without Processor Expert

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In this tutorial I explored how to use printf(), and this tutorial is so generic that it works for any processor/microcontroller. That flexibility is because I’m using Processor Expert. In case Processor Expert shall not be used, then some tweaks are needed. Here I show what is needed to have printf() working with the FRDM-KL25Z board. I use the UART0 connected to OpenSDA USB CDC for this.

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text, data and bss: Code and Data Size Explained

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In “Code Size Information with gcc for ARM/Kinetis” I use an option in the ARM gcc tool chain for Eclipse to show me the code size:

   text       data        bss        dec        hex    filename
 0x1408       0x18      0x81c       7228       1c3c    size.elf

I have been asked by a reader of this blog what these item numbers really mean. Especially: what the heck is ‘bss’???? 🙂

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Compiling C Files with GNU ARM G++

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If I want a C++ project for my KL25Z Freedom board, I select C++ during the project creation:

C++ Project Creation for GCC

C++ Project Creation for GCC

This creates a gcc C++ project with all the needed settings.

This worked fine until I added a *.c file to my project which had code in it which was not accepted by the C++ compiler. Wait! Should the *.c not be compiled in C mode, as I was used to with other compilers? It turned out that things are different with gcc (or g++) :-(: the *.c files in my project are compiled in C++ mode. So the question is: how to compile in C mode with the ARM g++ compiler?

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The Quotation Problem

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Maybe this article gets the attention of a local optometrist or eye shop: I have a business opportunity for you! ;-).

I ran into a weird problem: I received an ARM GNU gcc project which failed during the generation of the S19 file in strange way:

'Executing target #80 Freedom_Zumo.siz'
'Invoking: ARM Ltd Windows GNU Create Flash Image'
“C:/Freescale/CW MCU v10.3\eclipse\../Cross_Tools/arm-none-eabi-gcc-4_7_3/bin/arm-none-eabi-objcopy”  -O srec Freedom_Zumo.elf "Freedom_Zumo.hex"
' '
Der Befehl "“C:" ist entweder falsch geschrieben oder
konnte nicht gefunden werden.
mingw32-make: *** [Freedom_Zumo.hex] Error 1

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