I’m working on a Raspberry Pi (B+) project that should output audio through an FM transmitter IC. Right now I’m using the analog input, but I’d like to switch over to I2S, as the transmitter IC features a “digital mode”.
The mentioned IC is a 4713 by Silicon Labs. Their datasheet gives a minimal example how to use the digital mode:
I left out the resistors and connected DCLK, DIN, DFS directly to the Raspberry PCM_CLK, PCM_DOUT, PCM_FS.
It’s unclear to me, how to output the I2S to the transmitter IC? Which driver to use? I’m running latest and up to date Rasbian image on the Pi. I tried to load drivers for the HifiBerry, etc. and thought the might work with my IC, too. — no result.
The datasheet (silabs.com/Support%20Documen … 13-B30.pdf, P.23) says not much about the digital mode — mainly:
Can someone push me in the right direction, what software/drivers I need to install/use? The described I2S mode in the datasheet — is it “standard” and compatible with the Raspberry, or some proprietary thingi?
Thanks in advance & Regards,