is nrf52 dk support 3 wire spi interface

[pawan_v61]

hello i am new to spi, i am doing project on 3 wire spi interface. I am using 3 wire interface as Sclk,ssn,MOSI pins only , I am not using MISO pin .I am tested spi example code but does not works well.so can any one tell me that nrf52 dk -spi support 3 wire interface ( with out using MISO pin). The issue is the serial clock was not generates signals .For sending data the function "nrf_drv_spi_transfer(&spi, m_tx_buf, m_length, m_rx_buf, m_length) " was used.Every time ssn pin is low to send the data & it is set to high after sending the data.Here i am using AD9837 module as slave & it works on spi interface only.I am facing 1 issue i.e., as follows. Here the data i hexa decimal but in the example code the tx buffer must be character type

[pawan_v61]

the following link contains the nrf52dk does not support nrf52dk.This was stated by you only sir.That's I want clarity that is nrf52 dk support 3 wire interface or not ,because my slave module AD9837 works 3 wire spi interface only. devzone.nordicsemi.com/.../

[RK]

I asked you earlier if it was half duplex and you said it wasn't and you've said twice now that you're just not connecting one pin, ie it's a one-way connection only. Now you've linked to a question saying it is indeed half duplex and I said in that question, and I said earlier here, that isn't going to work.

If you are trying to do bi-directional SPI over one single data line, that is not supported.

[RK]

slowly, slowly you add more information about what you're doing. I checked the datasheet for that chip, it's unidirectional SPI, data is only written to it, never read. So again, the SPI interface will work just fine, you just define the MISO pin as 0xffffffff, the driver will work, there is nothing special to do here.

I said, in the link you pasted, that the 3-wire half duplex protocol was not supported. That's the one where one pin does transmit and receive. This is NOT that case with the chip you are using, this is a normal SPI interface where there is no data transfer from the slave, only writes TO the slave. That is supported, so now you need to start looking for your bug.

[pawan_v61]

ok thanks for support , i will looking into it.

[pawan_v61]

are you sure the spi transfer data successfully even though I aam not using Miso pin(ie., the master was not receiving any buffer data).In the data sheet the data is transfer when processor generates start & stop tasks . The processor generates start task when data is transfer from master to slave. The processor generates stop task when master receive data from slave to master.But I am not connecting MISO pin so there is no scope of receiving the slave data to master that's why there is no scope of generating stop task. Can you please confirm the processor will generate stop task & data send succesful from master to slave even though there is no data received from slave to master.