SPI RX problem (Only receive 0x00)

[Malo]

Hello,

I try to make my NRF52832 communicates with a memory (MX25R1635FZUIL0) in SPI.

When I try to read the memory ID, the RX buffer is fill with 0x00. But when I observe the MISO pin on the oscilloscope, I see the memory send some data.

I configure the SPI with the default configuration then change :

• MSB first
• mode : 3
• frequency : 8M
• miso : 9
• mosi : 15
• sck : 14
• cs : 7

I read that the pin 9 can also be used as NFC antenna (as you can see here). Is that why I can't receive anything ?

Thanks in advance for your answer.

Best regards,

Malo

[Malo]

I found the solution of my problem !

When you want to use a NFC pin as GPIO you have to add in the project prepocessor definitions "CONFIG_NFCT_PINS_AS_GPIOS" as explain here. This also applies to SPI pins and other protocols I imagine.

Thanks,

Malo