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I have a Freescale FRDM-K64F board and I have a simple question.
By default, the dev kit came with the mbed bootloader.

Now, I want to program the BIN file from here:

Here are my questions:
Q1) Can you use the KDS (Kinetis Design Studio) with the integrated OpenSDA to burn this software ?

Q2) Otherwise do I have to buy a JTAG programmer to change the bootloader in the FDRM-K64F ?
Example P&E Universal Multilink :

Q3) What is the recommended reader/writer (programmer) software for the Freescale Kinetis ?
Is there any tool (similar to CFFlasher of the Coldifre ) but for the Kinetis ?


STTM STM32 and STR91XF / STM32F746G-DISCO configuration
« on: November 14, 2016, 06:39:08 PM »

I downloaded and extracted the file "".

The utasker STM32 webpage says that there is 'out of the box' support for the "STM32F746G-DISCO" board.

However, I don't see any "STM32F746G_port.h" in the "\uTaskerV1.4.3_STM32\Hardware\STM32" folder.

Is the support files of this board only available in the commercial version of uTasker STM32 ?

Also, I would like to know what is the general status of utasker for the STM32.
Indeed, the last release (1.4.3) has been made on 2014-05-24. (which is more than 2 years old)
Is there active development of the STM32 branch of uTasker ?
Is it recommended for new development (new project) ?

On a similar subject, recently Qualcomm did purchase Freescale/NXP.
Does it have any impact on the uTasker RTOS developement ?

What is the general status of uTasker ?
Is it planned to be supported for another few years ? (Should I consider Freertos instead of uTasker ?)

Thanks for your time,


« on: April 27, 2016, 01:55:04 AM »

I'm using uTasker on the Coldfire M52233.
I have a question regarding this line from config.h:
  #define TICK_RESOLUTION 50

What are the "correct" values of this define ?
I'm planning to set TICK_RESOLUTION to 10 on the Coldfire M52233 with a 60 MHz clock.
Is there any problem to do this ? Would it also work if I set it to 1 ?

I see a comment on the same line but I don't fully understand its meaning and how it was calculated...
  // 50 ms system time period - max possible with M5223X at 60MHz (with prescaler) PIT would be about 70s!

Any explanations would be great.


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