NXP FlexIO Generator for the WS2812B LED Stripe Protocol

The challenge with the selection of a microcontroller for a project is: which one has the required number of UART, I2C, SPI? Combine this with the desired package (48pins, 64pins? LQFN?), the needed FLASH and RAM size and then even the hundreds of available microcontroller shrink to a handful only. And many times I need to make compromises: such as I need two hardware I2C, but the microcontroller matching all my other needs has only one I2C hardware. So I might end up with bit-banging the slower I2C bus. Doable, but not ideal.

What is cool that some of the newer NXP Kinetis microcontroller come with an interesting hardware: FlexIO. A peripheral hardware which allows me to implement a custom protocol, including driving WS2812B (Adafruit NeoPixel) LEDs with a FRDM-KL43Z board:

Four NeoPixels with FlexIO

Four NeoPixels with FlexIO

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Playing Tetris with a FRDM-KL43Z Board

How about to use the Freescale FRDM-KL43Z board (see “Unboxing the Freescale FRDM-KL43Z Board“) to play a Tetris game?

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SWD Debugging the FRDM-KL43Z

It is possible to use the Freescale FRDM-KL43Z to debug another board (see “Using the Freescale Freedom (FRDM-KL43Z) to Debug other Boards“). The FRDM-KL43Z has an on-board debug probe integrated, the OpenSDA. But it is easily possible to debug the board directly with a SWD debug probe like the P&E Universal Multilink or the Segger J-Link.

Debugging the FRDM-KL43Z with SWD

Debugging the FRDM-KL43Z with SWD

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Using the Freescale Freedom (FRDM-KL43Z) to Debug other Boards

In “Unboxing the Freescale FRDM-KL43Z Board” I was using the FRDM-KL43Z board the first time. The FRDM-KL43Z board has an on-board debug interface (Kinetis K20, OpenSDA). In this post I show how to use the FRDM-KL43Z board to debug another ARM board.

FRDM-KL43Z Board debugging custom (tinyK20) Board

FRDM-KL43Z Board debugging custom (tinyK20) Board

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Unboxing the Freescale FRDM-KL43Z Board

I’m preparing for the next semester at the university starting in September this year. As part of that, I’m currently evaluating the Freescale Kinetis FRDM-KL43Z board:

FRDM-KL43Z Board Unpacked

FRDM-KL43Z Board Unpacked

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