SPIs receive data query

[helen]

Excuse me:

                     The SPIS example in SDK is shown in the figure below,the m_rx_buf buffer has only seven bytes，Does NRF_DRV_SPIS_XFER_DONE event occur when the buffer is full？If the received data is less than seven bytes, will this event be triggered?If the SPI master sends  the last packet less than 7 bytes cannot trigger NRF_DRV_SPIS_XFER_DONE event, how can SPIS get the remaining data?

[ovrebekk]

Hi

The SPI slave interface uses the chip select signal to mark the start and stop of a transaction. 

As long as the SPI master de-asserts chip select (set it high) after the transaction is complete the NRF_DRV_SPIS_XFER_DONE event will occur on the slave side. It doesn't matter if you have sent the full 7 bytes or not. 

Best regards
Torbjørn