SAI I2S Mono Mode Not An Option

SHamm.18 · ‎2020-03-13

When using SAI for I2S, STM32CubeIDE does not give you the option to choose Mono mode. It's only option is Stereo Mode. However, STM32 SAI HAL supports both SAI_STEREOMODE as well as SAI_MONOMODE, so I think this should be an option.

victagayun · ‎2021-12-14

Hello I am using STM32F407 discovery kit, CubeIDE 1.8.0 and FW_F4 V1.26.2.

I plan to connect the mono mic via I2S as well and should be connected in mono mode.

Where do you get to change hsai_BlockA1.Init.MonoStereoMode to mono mode?

I cannot seem to find this code.

I am looking in:

MX_I2S2_Init(),

stm32f4xx_hal_i2s.h,

stm32f4xx_hal_i2s_ex.h, and

stm32f4xx_hal_i2s.c.

Where should I look for to modify?

waclawek.jan · ‎2021-12-14

This thread discusses SAI module, which is not present in the 'F407.

The SPI/I2S module does not have MONO option.

JW

victagayun · ‎2021-12-14

Sorry, my bad, just realized that!

Anyway, "The SPI/I2S module does not have MONO option"

can I use?

hi2s2.Init.DataFormat = I2S_DATAFORMAT_16B_EXTENDED;

waclawek.jan · ‎2021-12-15

I don't know. I don't know your application and I don't use Cube.

JW

Alexmouse · ‎2021-12-15

I was using the F411 for mono replay, mono source (for compact size) to mono amplifier - I had to make the data look like stereo to use the HAL driver.