External I2S Microphone and the STM32f4 Discovery

island1985 · ‎2013-02-25

Posted on February 25, 2013 at 17:46

Hi

Is it possible to connect an external I2S microphone to the stm32f4discovery? I know that the board already has a MEMS mic but I need to use my own microphone. Can I route the signals (MCLK, SD, WS, SCLK) to the GPIO pins by software or are the I2S module and the on-board MEMS mic hard wired?

#i2s

Tesla DeLorean · ‎2013-02-25

Posted on February 25, 2013 at 18:33

According to the manual/schematic for the STM32F4-Discovery I2S2 looks to be escapable. Would suggest you review.

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island1985 · ‎2013-02-26

Posted on February 26, 2013 at 15:57

Hi and thanks for your reply.

I have a Stellaris M3 board from TI and want to migrate my desgin to the STM32F4 Discovery board. The Stellaris board has a dedicated I2S peripheral. Now I know, that the ST device hase a SPI peripheral that is capable to be configured as I2S. I think this should be possible for the I2S_2 and _3 respectively the SPI_2 and _3.