* APB to SPI <https://opencores.org/project,apb2spi>
* ASIC-proven <https://opencores.org/project,spi_master_slave>
* Wishbone-compliant <https://opencores.org/project,simple_spi>
-
+* Raptor Engineering litespi, improved <
+https://gitlab.raptorengineering.com/kestrel-collaboration/kestrel-litex/litespi>
+* Also Shakti E-Class peripheral set in BSV