# DigiRadio — companion-chip firmware assets

Binary and SigmaStudio exports loaded by the ESP32 at every boot.

| Directory | Chip | Contents |
|-----------|------|----------|
| `ADAU1701-Firmware/` | ADAU1701 SigmaDSP | SigmaStudio export (`DigiRadio_IC_1.h`, …) — RAM program |
| `Si4684-Firmware/` | Si4684 DAB+/FM tuner | ROM patch + DAB + FM application images (`.bin`) |

## Si4684 blobs

`rom_patch_016.bin` and `dab_firmware.bin` are extracted from the
[PE5PVB SI4684-DAB-Receiver](https://github.com/PE5PVB/SI4684-DAB-Receiver)
project. `fm_firmware.bin` comes from the Skyworks Si4684 eval firmware pack
(see `tools/fetch_si4684_firmware.py --si46xx-dir`).

## ADAU1701 export

Generated by Analog Devices SigmaStudio for the DigiRadio DSP schematic.
Loaded on every boot (no self-boot EEPROM on this board).