SPI Communication problem between nRF51 DK and nRF52 DK

[JungWon Kim]

I have the test that spi communication between nRF51 DK(Master) and nRF52 DK (Slave).

use the example projects in SDK 12.2.

success build and writing but i have got a problem that no receive data on slave side.

i checked call spi_event_handler though break-point and debug.

when the spi_event_handler is called "event.evt_type == NRF_DRV_SPIS_XFER_DONE" is ture but rx_buffer is empty.

I don't know why.

I tried change MOSI pin, frequency, mode, bit_order ... but the rx_buffer still empty.

plz help me.

[Jørn]

Where exactly do you read the m_rx_buf value? I have the same setup here, nRF51 master, nRF52 slave, SDK 12.2 and it works fine on my end. Do ensure that all your pins are correctly connected. nRF52DK: SCK=P0.03, MOSI=P0.04, MISO=P0.28, CS=P0.29, and for nRF51DK: SCK=P0.01, MOSI=P0.02, MISO=P0.03 and SS/CS=P0.04.