topic Re: PN5190 Power on sequene help in NFC

PN5190 Power on sequene help

jr_hernandez — Mon, 19 Sep 2022 10:35:45 GMT

Hi,

I am trying to to connect eval board to my ESP32 and I am stuck at power on sequence.

I have done the HW changes requiered in Eval board PNEV5190B according to AN13425.

I have checked the VEN pin receives the pulse required for initial reset.

I have checked the SPI signals arrive to Module board where the PN5190 lies. But no answer in MISO pin, neither in IRQ pin.

FW gets stuck here:

The SWITCH mode message seems to be sent OK, but not sure if it is recieved ok in the PN5190.

Is there anything else I am missing?

Questions:

IRQ is raised after the VEN or after receiving the SWITCH_MODE message?

IRQ is raised after a SPI WRITE ?

Can this issue be related to base FW in PN5190? I have updated it when using the cockPit, see pic below:

Regards, Ramon.

jr_hernandez — Mon, 19 Sep 2022 11:46:52 GMT

Hi,

It turns out that my SPI driver was insertting 1 additional cero before the 0x7F. IRQ is being raised now. Great !

But Now, trying to get the answer...

Regards, Ramon.

jr_hernandez — Tue, 20 Sep 2022 09:39:59 GMT

Hi,

Still trying to get the answer from the PN5190. The response is all 1's (0x FF FF FF FF). See pic below.

Why IRQ does not go low after responding?

Any clue?

Regards, Ramon.

danielchen — Fri, 30 Sep 2022 14:10:40 GMT

I would refer to the EVK board as such, use an SPI sniffer to trace a communication start and then compare with your own implementation.

also please refer to the instruction layer document for details of the SPI and TLV format.

Regards

Daniel