Reading 808080 while connecting PN532 module with nRF52840 using I2C

[chaima nikolas]

Hello, I'm trying to use PN532 module with nRF52840 using I2C.
the data can be sent, but when it comes to read it, IRQ keeps high, so it reads 808080 .. I added a nrf_delay_ms(1) just before reading function, it worked fine (as it is shown in the photo) but when it comes to read an other data again, it returns 808080..

And when I add that nrf_delay_ms(1) in adafruit_pn532_data_read function, my code doesn't return anything.. Any idea please?!

[Jørgen Holmefjord]

Hi,

Is the data in the log what is received from the TWI, or is it what is received by the NFC reader? 

What modifications have you made to the example? Please post your code.

Best regards,
Jørgen

[chaima nikolas]

Hi. it's received from the TWI. it's working well now.. Thank you. I commented some unuseful lines I added in "main.c". It seems like they were causing the problem. So the example needs a nrf_delay_ms(1) in adafruit_pn532_data_read function and it will work perfectly.