nRF52840 SPI Slave

[KV]

I am trying to use peripheral/spis as a reference for configuring my nRF52840 DK as a slave. The SPI clock frequency is 1 MHz. The SPI master is another micro-controller.

On the first call to nrf_drv_spis_buffers_set(...), I get an interrupt event NRF_DRV_SPIS_BUFFERS_SET_DONE and after that I don't get NRF_DRV_SPIS_XFER_DONE event at all.

I can see the SPI clock, MOSI data from the master and CSN low (before master starts transmitting) on the o-scope. What could possibly be wrong?

[Petter Myhre]

It should work. Which pins are you using? Are you using the SPIS driver?

[Sylvain]

I have the same problem and I use the SPIS_PCA10056 example. Here's my definition of pin :

#ifndef APP_SPIS_SCK_PIN
#define APP_SPIS_SCK_PIN 47
#endif

#ifndef APP_SPIS_MISO_PIN
#define APP_SPIS_MISO_PIN 46
#endif

#ifndef APP_SPIS_MOSI_PIN
#define APP_SPIS_MOSI_PIN 45
#endif

#ifndef APP_SPIS_CS_PIN
#define APP_SPIS_CS_PIN 44
#endif

#ifndef APP_SPIS_IRQ_PRIORITY
#define APP_SPIS_IRQ_PRIORITY 7
#endif

I don't undertsand why it doesn't work ...

[Sylvain]

Now it works, I had to put a delay on my master SPI Nucleo board ...

[Saili]

Hi Sylvain,

Where in the SPI master code did you put the delay? After the master had sent a byte? Please let me know, I am having the same issue.