Is it possible to do back to back SPI transfers or read only during RX time?

[seneryilmaz]

I need to write received data from SPI to address pointed by a parameter. When doing a transfer, spi drivers also read the data sent by slave during TX. I know this is normal since SPI is full-duplex protocol. However, I have strict time constraints so I can't copy read data between buffers (I've done this and it worked but the performance wasn't great). Also, I can't use pointer arithmetics since buffer is elsewhere. I thought that if I could make TX - RX transfer back to back seperately, I can solve this problem. Is there a way to do this or do I have an alternate solution?

[seneryilmaz]

I need to read data from SPI slave before next interrupt rises which is approximately 100-200 microseconds.

I think I couldn't explain myself well enough.

I don't want bytes A, B, C sent by slave in my rx buffer. How can I do that? 

[haakonsh]

But do you need to process that data every 100-200µS or is it okay to keep it in RAM and process the data in larger batches at a later time? 
 

seneryilmaz said:

I think I couldn't explain myself well enough.

 You sit on all the context here, I'm not a telepath. 

 

seneryilmaz said:

I don't want bytes A, B, C sent by slave in my rx buffer. How can I do that? 

 You can't.