Embedded & hardware
ADAT for ESP32-P4
8-channel ADAT lightpipe TX/RX in software.
ADAT optical I/O on the ESP32-P4: I2S+APLL generates the exact bit clock for transmit, while the RMT peripheral measures pulse durations from a TOSLINK module to recover the receive clock — no external PLL needed.
Specifications
- 8 channels × 24 bit @ 44.1 / 48 kHz
- TX: I2S + APLL exact 12.288 / 11.2896 MHz bit clock
- RX: RMT @ 80 MHz pulse measurement, self-clocking
- NRZI + 4-bit nibble stuffing + sync pattern, all in C
- Wires straight to TOTX173 / TORX173 modules
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