topic Re: SensorFusion library on KW41Z MCU in Wireless MCU

SensorFusion library on KW41Z MCU

heelcurve5 — Tue, 07 Nov 2017 15:19:17 GMT

I'm looking for an MCU with BLE that has enough resources to run SensorFusion library and KW41Z MCU seems lilke a good fit. Has anyone tried running SensorFusion on this MCU? Its spec says that it has "up to" 128K of SRAM but who knows how much of that is available for the application. SensoFusion needs at least 12.5 KB + 60K of flash

( according to this document : https://www.nxp.com/docs/en/user-guide/NSFK_Prod_UG.pdf )

Thanks Andy

Re: SensorFusion library on KW41Z MCU

gerardo_rodriguez — Tue, 14 Nov 2017 17:41:27 GMT

Hello Andrew,

The KW41 MCU is available in two memory configurations:

-MKW41Z512VHT4 with 512 KB Flash and 128 KB SRAM.

-MKW41Z256VHT4 with 256 KB Flash and 64 KB SRAM.

The document "<SDK path>\docs\wireless\Bluetooth\BLE Release Notes.pdf" shows the memory footprints for some of the BLE applications. For example, the Heart Rate Sensor application uses about 26KB of RAM and 134KB of Flash, so there should be enough memory for the SensorFusion library.

Regards,

Re: SensorFusion library on KW41Z MCU

heelcurve5 — Tue, 14 Nov 2017 18:36:21 GMT

Thank you Gerardo

How much RAM/FLASH is used by the OS ( including BLE and WiFi stacks)

Re: SensorFusion library on KW41Z MCU

gerardo_rodriguez — Wed, 15 Nov 2017 16:36:41 GMT

You can find a more detailed description of the memory usage in the BLE Release Notes. For example:

Is this what you are looking for?

KW41 doesn't support WiFi.

Regards,

Re: SensorFusion library on KW41Z MCU

heelcurve5 — Wed, 15 Nov 2017 18:00:20 GMT

Great, that's pretty much what I needed. There should be plenty of room left for the SensorFusion. As for Wi-Fi

it is supported in MKW41Z512VHT4 according to this doc

https://www.nxp.com/docs/en/fact-sheet/KNTSKW41Z31Z21ZFS.pdf

Thank you for your help

Re: SensorFusion library on KW41Z MCU

gerardo_rodriguez — Wed, 15 Nov 2017 18:39:20 GMT

Glad I could help.

KW41 supports BLE, Generic FSK and 802.15.4. Could it be that you are thinking of the 802.11 standard which WiFi is based on?

Re: SensorFusion library on KW41Z MCU

heelcurve5 — Wed, 15 Nov 2017 18:51:37 GMT

Yes, I was thinking 802.11. I'm not familiar with 802.15.4

Will look it up

Thanks

Re: SensorFusion library on KW41Z MCU

haarism19 — Wed, 04 Jul 2018 13:37:27 GMT

Hey Andrew,

I'm trying to do the same. I looked over the Sensor fusion library and its documentation and it shows that it supports FRMD-K22F and FRMD-K64F. The SDK of LPCXPRESSO54114 also shows that it supports sensor fusion library.

I wanted to use the BLE module like QN9080 or KW41Z, but the SKDs of these MCU doesn't have any sensor fusion library. I wanted to know if this sensor fusion library is generic and applicable to any MCU.

Also if I can use it with my KW41Z or QN9080.

If its possible then how did you achieve that, I'm new to this so any kind of guidance would be helpful.

Thanks

Re: SensorFusion library on KW41Z MCU

heelcurve5 — Thu, 05 Jul 2018 15:20:04 GMT

For various reasons I didn't pursue this any further beyond initial

research.

Re: SensorFusion library on KW41Z MCU

haarism19 — Fri, 06 Jul 2018 04:57:48 GMT

Ohh okay. What was your approach? Were you thinking to create your own port file?

Re: SensorFusion library on KW41Z MCU

heelcurve5 — Fri, 06 Jul 2018 17:34:10 GMT

The project took another turn and at this point not using SensorFusion at

all. But may revisit in the future