Problem with DFSDM clock...

[WAGUI]

HI since fews days, i'm trying to get data from my microphone connected in stereo mode on my evaluation card B-L475E-IOT01A and give them to the DAC. According to the datasheet PE7 is DFSDM1_DATIN2 and PE9 DFSDM1_CLKOUT

so i activated channel 1 on channel 2 in PDM/SPI mode in order to get the PDM values of the microphone.

Unfortunalty the CKABF flag = 0xFF witch mean that i have no clock. Therefore i don't get any good value on my buffer. indeed there are no data wich enter on the channels.

i choose the SAI 1 (audio clock) as clock source and i tried with system clock but the result is the same

Hope that someone can help me =)

the code in copy