understanding SPI with easy DMA

[Mikhail]

Hi!

I want to understand different in use with DMA and w/o DMA in the SPI.

I explore example SPI from SDK examples and see that enabled SPI and SPIM together.

But at this case what 

spi_event_handler

handled?

SPI works with DMA? If I don't want to work with DMA? What should I do? 

[Mikhail]

Ok, therefore if I need DMA SPI I sould enable only SPI_ENABLED .

But if I want slave or master SPI?

I thought that for use slave or master I should use SPIM or SPIS

 

[ovrebekk]

Hi Mikhail

If you want SPI slave you should enable SPIS_ENABLED. 

This define is not included in the SPI master example, but you can look at sdk_config.h in the SPI slave example to see how it can be implemented. 

Please note that there is no choice of DMA or not when using SPI slave, as the SPI slave peripheral had DMA from the start. 

Best regards
Torbjørn