SPI interfacing of nRF 51822 and RFID reader

[deepu]

Hello, i would like to interface nrf51822 with an rfid reader mfrc522 using SPI.So, i went through the example of spi_master in SDK 8.1.0.How can we access the value of a register in mfrc522,as the NRF SPI code is not that easy to understand.Is that in TXD register we have to give the required register address??On giving so i get the same register address in RXD register after 2 bytes again and again instead of the value in the particular register.

Can anyone please help me sort out this ??

[Petter Myhre]

The spi_master is the SPI Master Loopback Example.

I believe the SPI Master Example to be used with SPI Slave Example is a better starting point.

Anyways, both of these use the SPI Master driver.

After initalization and configuration, you can see from the documentation it uses spi_master_send_recv() to send and receive data.

When data transmission has ended successfully the SPI_MASTER_EVT_TRANSFER_COMPLETED event is received by the spi_master_event_handler().

[Manjunath G]

where did you get mfrc522.h and mfrc522.c files? if you have,please give the link of that.