FXLS8962: Multiple sample read using FIFO buffer

[Reynir]

Hello,

I am using the FRDM-K22F-AGMP03 development board to evaluate the FXLS8962 accelerometer. My intensions were to use a burst read operation to read the FIFO output data buffer and ran into a bug there. First two samples are unique but the following samples are all replica of the second sample. I found more information on the matter in the errata sheet (https://www.nxp.com/docs/en/errata/ES_FXLS8962AF.pdf).

I have two questions on the matter:

- I did not fully understand how to implement the workaround 2, are there any tips or examples where this method is implemented.

-   I'm also interested to know if the FXLS8964 and FXLS8974 have/will have this issue.

Thanks, 

Reynir

[JackITB]

Hi Reynir,
The FIFO bug has been fully fixed on FXLS8964/74 so they will allow "large burst read" operation to collect all samples in a single transaction.

Regards, Jacques.

[TomasVaverka]

Hello Reynir,

The workaround recommends to read 6 bytes starting from register 0x0C (BUF_X_LSB) in one I2C burst read command:

This way you read out one sample of X, Y, Z-axis output data from the FIFO. This sequence needs to be repeated for all samples in the FIFO.

Best regards,

Tomas

[PinkMagpie]

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[PinkMagpie]

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