Location of source for HAL_SAI_TransmitReceive_DMA for use with bi-directional audio? Listed in stm32L4xx_hal_sai.c comments, but I cannot find a version containing it.

Hello @Community member​ ,

The HAL_SAI_TransmitReceive_DMA function is removed from I/O operation section, also from the comments in stm32L4xx_hal_sai.c.

I recommend you to use the latest version of STM32CubeL4 MCU firmware.

I think the mention of this function in the past was a typo in the header of the file. Such a function has never been implemented in the STM32L4 and moreover it is not possible, because we cannot do Rx and Tx at the same time.

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Imen

Thank you. Since posting I've found that two channels on single DMA controller with linked SAI blocks can provide concurrent access AFAIK.