STM32F769I Discovery Kit SPDIF RX to SAI Out audio loop example

[madhanmohan]

Posted on September 30, 2016 at 16:08

I am developing an audio application on STM32F769I discovery kit and it require to process Audio sample from SPDIF RX and playback through on-board codec via SAI. Is the any example which demonstrate how to synchronize SPDIF RX with SAI transmitter on STM32F769I Discovery Kit?

[slimen]

Posted on September 30, 2016 at 16:26

Hello,

You can start from SPDIFRX example available under

http://www.st.com/content/st_com/en/products/embedded-software/mcus-embedded-software/stm32-embedded-software/stm32cube-embedded-software/stm32cubef7.html

STM32Cube_FW_F7_V1.4.0\Projects\STM32F769I-Discovery\Examples\SPDIFRX\SPDIFRX_Loopback

Regards

[madhanmohan]

Posted on October 03, 2016 at 09:23

Hi,

Thanks for the info. Yes I've used the example as reference and developing an application. Initially SPDIF Rx and SAI Transmitter are in sync and suddenly they are out of sync. And after some time they become in sync and the sequence continues. For both SPDIF Rx and SAI, the input clock is PLLI2S. It seems there is a frequency drift on the SPDIF Rx.