RECALIBRATION process

[jr_hernandez]

I am using NfcLib and I am having troubles when a tag remains on field for a while.

It turns out that once the tag is detected by my reader if the tag is left over the antenna the system remains quite (while performing LPCD bursts). Once the tag is removed the PN5190 wakeup and a reading error is given because is not in field anymore.

It seems to get calibrated right after reading the tag.

I have been playing with the option 

NXPBUILD__PHHAL_HW_PN5190_LPCD_CALIBRATE_ONCE

but it does not have any effect, it seems to calibrate always after reading a tag.

Is this caused by recalibration or card removal process or by which process?

How can I avoid this?

Regards, Ramon.

[KaiLi]

Hello @jr_hernandez 

Thanks for contacting us and interesting in the NXP products.

Based on your description it's recommended that you try this example SW661018\Examples\NfcrdlibEx6_LPCD, you can manually set the variable (dwLPCDCalibrateOption = 0) to 0, and then calibration will be only once.

please feel free to contact us if any questions.

Best Regards,

kelly