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AM335x convert SPI to I2S

Hi,

We need to communicate 3 kind of audio peripherals (Music player, BT audio, GSM audio), unfortunately AM335x have only MCASP channels. i need additional one. Regarding SPI to I2S conversion i checked the following links.

Is there any possibilities to convert SPI to I2S in AM335x processor.

1. http://www.ti.com/lit/an/slaa449a/slaa449a.pdf

2. Using Altera SPI to I2S CPLD converter