Kinetis K40X256LQ100 - KwikStik RTC

[kwiksay2]

I have a Kinetis Kwikstik K40 development board, that I bought a few years ago, but I see they are still available.

I has the K40x256LQ100 chip on a board with LCD display and Seggar Jlink on board and programs via USB port.

I can get basic program examples to run, Blinky etc, I am using uVision 5.29 with v4 legacy options. The target that I seem to use is MK40N512MD100...???. My question is how to start the on chip RTC. I can display the time and date using ctime, localtime etc and see the time tm struct fields in C program and change them but they don't get updated....?? always read 1 jan 00:00:00 1970 etc....epoch year. What function or settings etc should I be using.??

I can change it to read say 22 May 12:34:56 1998 and it always reads that....doesn't change as time progresses.???

[diego_charles]

Hello,  kwiksay2

This is the solution for working with the RTC as we discussed previously on your ticket. 

Since the  MCUxpresso SDK does not support the board KwikStik-K40 and there are no RTC examples for the K40 MCU wich the Kwikstik board has. 

The workaround was to import the SDK example from the TWR-K60D100M  SDK. Then download the SDK for the 

MK40X256 MCU and create a new project importing the drivers for RTC.  Then, reuse the example code for the RTC example of  TWR-K60D100M   into the project for the Kwikstik MCU. 

Have a great day,
Diego

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[mjbcswitzerland]

Hi

Try https://www.utasker.com/kinetis/KWIKSTIK.html
Code is open source on Github, including KwikStik simulator.

Regards

Mark
[uTasker project developer for Kinetis and i.MX RT]

[kwiksay2]

thanks for reply, I had looked at utasker but it seems to be another system possibly for Codewarrior, or is it for any IDE system.???

I am trying to use armKeil uVision as it seems to be the one published on the KwikStik web pages. I had tried MCUxpresso and took it off again when couldn't get it to do anything on KwikStik, but NXP say it doesn't support KwikStik but then they suggest I should download MCUxPresso and port code from other mcu examples...???.

As far as I can see the KwikStik is still available to buy new with the same chip onboard, so does no-one do any software that supports it..????. at least with arm Keil uVision I can program and download some functions and display to LCD on board

[mjbcswitzerland]

Hi

uTasker supports the KwikStik with

- Keil uVision
- IAR,
- MCUXpresso
- KDS
- CodeWarrior
- S32 Design Studio
- Rowley Crossworks
- CooCox
- Green Hills
- Atollic
- GCC Make file build
- Visual Studio simulation and Visual GDB

Regards

Mark
[uTasker project developer for Kinetis and i.MX RT]

[kwiksay2]

Ok, but what is uTasker, is it just a series of bin files. How are you meant to use it...?

[mjbcswitzerland]

Hi

If you don't know what uTasker is or how to use it you can learn all about it at these links:

Open Source code: https://github.com/uTasker/uTasker-Kinetis

Kinetis Tutorial: https://www.utasker.com/docs/KINETIS/uTaskerV1.4_Kinetis.pdf

SLCD user's guide and simulation: https://www.utasker.com/docs/uTasker/uTasker_SLCD.pdf

Kwikstik / SLCD video: https://www.youtube.com/watch?v=nm2DmZv1rj8

All documentation: https://www.utasker.com/docs/documentation.html

Other videos: https://www.youtube.com/watch?v=kWNlsAoMly4&list=PLWKlVb_MqDQFZAulrUywU30v869JBYi9Q

Regards

Mark
[uTasker project developer for Kinetis and i.MX RT]