Question about TX_EN timing control of nRF5340+nRF21540

[Lulu.C]

Hi,

In SDK2.0.0 version, can the TX_EN timing of nRF21540 be changed through SPI control?

If the timing of TX_EN can be changed through SPI control, how FW implements SPI to control TX_EN timing?

Is there any FW sample for SPI based on nrf5340+nRF21540?

Any help would be appreciated.

  

Best Regards,

[Bendik Heiskel]

Hi,

The nRF Connect SDK does not have support for controlling the nRF21540 through SPI only. There is only support for GPIO only or GPIO + SPI. The implementation in the SDK uses only SPI for changing TX gain, and GPIO is used for TX/RX enable, antenna selection, 10/20dBm control using the MODE pin and PDN.

If you want to use the SPI interface for controlling TX/RX enable you will have to implement this yourself.

 

Best regards,

Bendik