Hi Johan,
it is rather similar to F1, just some different names for DMA stuff.
You can probably start from a F1 example:
https://github.com/libopencm3/libopencm3-examples/blob/master/examples/stm32/f1/lisa-m-2/spi_dma/spi_dma.c
and make the changes for F4 (dma_stream_x instead of dma_channel_x).
I am using SPI on my STM32F4 Discovery board together with libopencm3.
The function I use is spi_send located in spi_common_all.c
This function is blocking and sends one byte(short) at a time.
I wonder if there is some driver/API in libopencm3 to use SPI on STM32F4 in
interrupt or DMA mode?
Best
