SPI clock stops after tx even if requested for rx

[sunil kumar]

Iam using softdivice 110 and sdk 10.0.0, iam using spi driver for interfacing with spi slave device(flash memory device). I need to send command and then receive the data present in flash, iam using function nrf_drv_spi_transfer() to transfer the data. The problem is when nrf_drv_spi_transfer function with 3 bytes to send and 2 bytes to receive the clock cycles are stops after sending 3 bytes. kindly help me out

[RK]

I don't know how many times this gets discussed. SPI is a synchronous transfer protocol (it helps to read about the protocols you're using) so if you ask for 3 bytes to send and 2 to receive the driver will transfer a total of 3 bytes, because the two receives are at the same time as the first two of the sends.

If you want 3 bytes sent THEN two received, you need to give it 3 for send and 5 for receive, and ignore the first 3 bytes.

[sunil kumar]

sorry if it is silly question, thank you for your response