Bidirectional i2s using SAI on stm32f4 and f7

[WJabl.1]

I've got an audio codec chip with bidirectional i2s interface, but I can't find any examples or any other info on configuring bidirectional i2s through SAI and HAL in stm32 microcontrollers. I am able to configure single-direction i2s just fine. How do I configure the full duplex mode?