Tag Archives: FRDM-K64F

Learning about Kinetis SDK!!:)

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We all know that for an application to develop, for a project to work we need hardware along with the software.  So here we are with our FRDM-K64F development boards, but the question is-how to make them work? I wrote in my second blog about the new getting started process by Freescale for the FRDM-K64F: http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=FRDM-K64F&tab=In-Depth_Tab

This link gives me the opportunity to download the very helpful Kinetis Software Development Kit (SDK) along with the Integrated Development Environment which includes the toolchain Kinetis Design Studio. Let us talk a bit about the Kinetis SDK in this blog. So what does Kinetis SDK is responsible for? In simple terms, it is just software framework which helps us in developing applications across all Kinetis Microcontrollers. It is a package of pre-written code that developers can re-use in order to minimize the amount of unique code that they need to develop themselves.

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Getting to know FRDM-K64F and more!! :)

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I believe waiting makes you feel more impatient. So here I am, waiting for my NeoMatrix 8×8 – 64 RGB LED Pixel Matrix to arrive, so that we can begin working on our cool project. But looking on the brighter side, I got some time to make the beforehand preparations for our Signboard project. I took the opportunity to invest this time in finding out how to start running the Adafruit NeoMatrix with Kinetis FRDM-K64F development board. We should definitely get ourselves ready with something so that we can test NeoMatrix with FRDM-K64F as it arrives. So I thought of setting up a repository where we can turn back anytime we feel we are stuck.

document-management-software

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Let’s play with Freescale FRDM-K64F

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Hello Again!

In my previous blog I talked about the new getting started process for Kinetis FRDM-K64F development board. Here I am with my next blog going one step further and introducing you to the target application that I have planned for this summer using the awesome FRDM K-64 development board from Freescale. I am planning to work on some really cool stuff that we can do from this board. And I came up with an idea for making an Adafruit NeoPixel NeoMatrix Signboard!!adafruit LED

Wait….does it sound boring to you? Nah… we are not planning some ordinary signboard. This Adafruit NeoPixel NeoMatrix signboard is really cool. It will display what you want to display and it will change the displayed text with just the movement of your hand. Sounds interesting now?? Continue reading →

FreeRTOS Continuous Trace Streaming

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Key to successfully implementing embedded applications these days is to have detailed visibility into what is going on with the application on the board. For this, I’m using the FreeRTOS+Trace from Percepio to inspect the runtime behaviour. Stop-Mode debugging is very useful, but visibility into the runtime is even more important. FreeRTOS+Trace is a tool to accomplish this, but it requires to dump the data off the target to the host (see “Updated Percepio Tracealyzer and Trace Library to Version V2.7.0“). Usually, I’m using the GDB debugger for this, and that works for shorter trace sequences like a few seconds. Yes, I can combine them, but it painful to stop, dump and continue. So what if I could collect trace for several minutes or hours without the need to stop the application? Why not stream the data to the host directly?

So here is it: I’m now able to get almost unlimited trace streaming off the target, witout user intervention. I can trace my application for hours 🙂

Trace Recording

Trace Recording for almost one hour

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Getting started with Kinetis FRDM- K64F: New and Better!! :)

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Hello all!

Here is my second blog about the Kinetis MCU development boards, introducing you to the new and more informative Getting Started process for Kinetis FRDM-K64F from Freescale. As a part of my internship I got the amazing opportunity to play with the ‘New Getting Started’ process and the most recent box of the FRDM-K64F development board from Freescale.

Freescale have been working all along to make the life of its customers easier. So, at the FTF 2015 we launched the new website:

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=FRDM-K64F&tab=In-Depth_Tab

This website is for the new Getting started process for FRDM K-64F. This website will tell you all that you will need to start the FRDM K-64F development board. Continue reading →

Using Segger Real Time Terminal (RTT) with Eclipse

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I have used semihosting more and more in my projects. However, there are several disadvantage of using it:

  • Without special handlers, it only works with an active debug connection going on. Without a debugger attached, the application blocks otherwise.
  • Because it needs debugger interactions, it is rather slow (only several hundreds of bytes per second)

The good news is that Segger supports with their debug probes a faster approach with what they name Real Time Terminal (RTT). And it even runs without a debugger attached to the board: all what I need is a Segger J-Link probe (or Segger J-Link OpenSDA) plus a telnet client.

Segger RTT Viewer

Segger RTT Viewer

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Enabling/Disabling FXOS8700CQ Device Needs a Delay

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Found an interesting behaviour with the Freescale FXOS8700CQ on the new Sumo Robots (see “Sensor and Communication Shield for Sumo Robot“): when enabling the accelerometer/magnetometer, it actually did not work:

Failed to Enable FXOS8700 Accelerometer

Failed to Enable FXOS8700 Accelerometer

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UART printf() for the FRDM-K64F Board and Kinetis Design Studio

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I had great plans for this Saturday: to work on really cool project. But as so many times, things turned out to be different. Maybe you have read my recent posts about printf()? A colleague wanted to use that article to the same thing with the Kinetis Design Studio on the FRDM-K64F board. I used the FRDM-KL25Z board, so I expected this to work out of the box for him too. Well, turned out that I was wrong about this, and my Saturday was used for debugging and googling about a printf() problem 😦

While things work as expected for the FRDM-KL25Z (ARM Cortex-M0+) and using the standard GNU GCC ARM Embedded from the launchpad, the application traps on the K64F (ARM Cortex-M4F) in initialise_monitor_handles() with KDS:

Trap in initialize_monitor_handles()

Trap in initialize_monitor_handles()

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Tutorial: Nordic Semiconductor nRF24L01+ with the Freescale FRDM-K64F Board

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For some time I’m using the Nordic Semiconductor nRF24L01+ transceiver successfully in many projects (see “Tutorial: Ultra Low Cost 2.4 GHz Wireless Transceiver with the FRDM Board“). Since that tutorial things evolved a lot with the introduced RNet Stack. To honor the popularity of the Nordic Semiconductor nRF24L01+, Freescale has put a socket on the FRDM-K64F board. So time to make a new step-by-step tutorial how to use the nRF24L01+ with the FRDM-K64F.

Two FRDM-K64F Boards with nRF24L01+ Transceiver

Two FRDM-K64F Boards with nRF24L01+ Transceiver

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