PN7150 does not seem to be performing any discovery

[shaheenmahomed]

Hi

I am  trying to interface an STM32F4 uProcessor to a PN7150.  I have the PN7150 with the Arduino SBC kit and have connected the STM32F4 to the SBC kit successfully.  I am able to RESET and INIT the PN7150 anf, following the User Manual, have gotten to the point where I send the Discovery Command and get back a STATUS_OK response.  I am not able to detect any cards or see any polling activity on the antenna of the SBC.

I have set up the discovery map  for T1T, T2T, T3T and ISO_DEP cards
uint8_t disc_map_command[] = { 0x21, 0x00, 0x0D, 0x04, 0x01, 0x01, 0x01, 0x02, 0x01, 0x01,  0x03, 0x01, 0x01, 0x04, 0x01, 0x02};

I'm not changing the configuration parameters and then I send the Discovery command

uint8_t disc_command[] = { 0x21, 0x03, 0x09, 0x04, 0x00, 0x01, 0x01, 0x01, 0x02, 0x01, 0x06, 0x01};

I dont see anything on the antenna indicating polling taking place, and there is no change in the IRQ to indicate a message from the NFCC when placing a card is placed in the antenna field.

Am i supposed to send the discovery command every time i would like to poll or is a single command supposed to initiate polling and make the NFCC poll cyclically?

How do i confirm that the NFCC is polling and what should i expect when a card is detected?

Thanks for any assistance you can provide to get this working.

Shaheen Mahomed

[Jorge_Gonzalez]

Hello Shaheen Mahomed,

Our apologies for the time with no response to your post. Do you still have this issue? Let me know the status.

Answering your questions:

- Once you send the discovery command (RF_DISCOVER_CMD) and if PN7150 responds with STATUS_OK, then the device will be in the RFST_DISCOVERY state executing the polling loop continuously.

- When a single card is detected and activated, then the PN7150 asserts the IRQ pin to send a notification to the host (RF_INTF_ACTIVATED_NTF).

Your configuration seems good to me, but you did not mention what kind of card you were trying to detect.

Regards!

Jorge Gonzalez