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About the SAI duplex mode of STM32F746

Question asked by jiang.db on Oct 29, 2015
Hi,my friend, 
I want to implement the both TX/RX channel of SAI, but can not find any code sample in STM32CUBE. I want to use DMA to transfer audio data between SAI and codec and start the TX/RX DMA at once and just use one DMA interrupt callback to process data. Now I can run the SAI_AudioPlay sample to play audio file on my board and which just use the SAI1B, working in slave mode. I add some code to init the SAI1A as the SAI1B, but found no data recieved in the RX buffer, but TX is work fine. Any one could help me ? Many thanks!