I2S audio driver in Master mode,HOW TO set the BCLK parameter

[winwan]

I2S audio driver in Master mode, I want to set the BCLK parameter, X*fs, such as 32fs,64fs,128fs....... At present, there seems to be no interface for this setting, which is very inconvenient

[Hannu]

BCK is bit the clock. It is always 2*16 or 2*32 time Fs

You want MCLK to be X*fs. MCLK is 12.288 MHz. 48 kHz sampling rate is 256 times lower than MCLK 96 kHz is 128.

[winwan]

Sorry, wrong number
I2S audio driver in Master mode, I want to set the MCLK parameter, X*fs, such as 32fs,64fs,128fs....... At present, there seems to be no interface for this setting, which is very inconvenient

[Hannu]

MCLK is fixed to XTALI. Also the I2S HW is clocked from XTALI. That way you get good clocking for your external DAC. PLL based clocking options wouldn't be as good as crystal locked.

If you want specific N*fs MCLK, change the Fs.