stereo I2S communication

[JAn.1610]

I am using STM32F103C for mcu and SPH0645 model for microphone.

When I connect only one microphone and communicate with I2S it works!

then I wanted to do make stereo

So I connected two microphones one with SEL=0 and the other with SEL=1

However, WS gives only 1 when it should give 0 and 1 alternately.

Can anyone tell me what should I do to connect stereo microphones!

Thanks

[waclawek.jan]

> However, WS gives only 1 when it should give 0 and 1 alternately.

Read out and check/post the relevant GPIO/AFIO and SPI registers content.

JW

[JAn.1610]

I set up like this

when I debug and run the program I2S3_WS and I2S3_CLK always remained 0 and I2S2_WS and I2S2_CLK always remained 1. It never changes.

[JAn.1610]

[JAn.1610]

[waclawek.jan]

I don't understand, what is this?

JW

[JAn.1610]

I want to know how to read CLK values.

CLK should repeat 0 and 1 but when I use HAL_GPIO_ReadPin I don't get the value changing.

[waclawek.jan]

If those signals change as they should, by repeatedly reading out you should see them changing. Or, better, use oscilloscope or logic analyser to observe the pins.

Read it and check/compare to the working case content of SPI/I2S and the relevant GPIO/AFIO registers.

JW