NRF52832 SPIM nrf_drv_spi_transfer()

[jackliu8023]

hardware:NRF52832

SDK:17.02

I'm trying to get SPIM working with a RF(SX126). I'm currently trying to use the nrf_drv_spi_transfer() function. 

I need to read and write a byte.16 pulses will be generated by calling the function CLK, why not 8.

I want to get the blue data when I write the red data.Please tell me what to do.

[Edvin]

Hello,

I believe what you are seeing is described in this errata/anomaly: Errata 58 - SPIM: An additional byte is clocked out when RXD.MAXCNT = 1

Try applying the workaround, and see if that solves the issue with the extra byte on the clock. Remember that this will trigger the stop task whenever the SPI is started, so in case you ever need to send more than one byte (actually, receive more than one byte), you need to disable this workaround temporarely.

Best regards,

Edvin

[jackliu8023]

HI: Edvin

Your guidance helped me to solve the problem successfully.

Thank you very much.

Best regards