The same question as Lei huang2.
How to setting: Multichannel Audio Serial Port 7 as Audio I2S output master mode?
1, So far mcasp7 [mcasp7_ahclkx] setting asI2S MCLK = 20MHz, but can not setting as 12.288MHz or 24,576MHz.
It is AM5728 chip internal colock bus limitation, right?
If it can not do this, we can add a Crystal on board.
2, If MCLK can not generate base on I2S standard format, how can setting [mcasp7_aclkx] and [mcasp7_fsx] as BCK and LRCLK as below clock.
They need meet as I2S standard as [mcasp7_aclkx] as BCK = 12.288MHz/64Fs or 6.144MHz/128Fs or 3.072MHz/256Fs.
And [mcasp7_fsx] as LRCLK = 192KHz or 96KHz or 48KHz.
Those are standard I2S format for audio master output.
We will driver standalone DAC, chip AD1955.