# 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

Proprietary Skyworks images — **local only**, gitignored (`*.bin`). See
[`Si4684-Firmware/README.md`](Si4684-Firmware/README.md) for procurement and
legal notes. Populate with:

```bash
cd Software
python3 tools/fetch_si4684_firmware.py --dab-only
python3 tools/fetch_si4684_firmware.py --si46xx-dir /path/to/si46xx_firmware
python3 tools/check_si4684_blobs.py
```

## ADAU1701 export

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