42 lines
1.8 KiB
TeX
42 lines
1.8 KiB
TeX
\chapter{Introduction}
|
|
\label{ch:introduction}
|
|
|
|
DigiRadio is an open-source, high-fidelity digital radio receiver. It
|
|
receives DAB+ and FM broadcasts, processes the audio through a dedicated
|
|
signal processor, and streams the result over Bluetooth using a
|
|
high-resolution codec. The whole project --- hardware and firmware --- is
|
|
released as open source for the maker and audio community to study,
|
|
build, and improve.
|
|
|
|
\section{What DigiRadio is}
|
|
|
|
Most DAB+/FM hobby projects stop at basic reception. DigiRadio adds two
|
|
things that lift it into hi-fi territory: a real audio DSP stage for
|
|
equalisation and mixing, and a premium-codec Bluetooth output. The result
|
|
is a genuine wireless audio source rather than a bench demo, and, being
|
|
fully documented, a practical reference for anyone learning multi-chip
|
|
audio design or RF-aware PCB layout.
|
|
|
|
\begin{drkey}[At a glance]
|
|
A four-chip design --- Si4684 tuner, ADAU1701 DSP, ESP32-S3 host, and an
|
|
FSC-BT1035 Bluetooth transmitter --- on a six-layer board, powered from
|
|
USB-C, configured through an elegant web interface.
|
|
\end{drkey}
|
|
|
|
\section{Who this manual is for}
|
|
|
|
This manual documents the system for someone building, flashing, or
|
|
extending DigiRadio: the hardware at a block level
|
|
(Chapter~\ref{ch:hardware}), the firmware architecture
|
|
(Chapter~\ref{ch:firmware}), the per-class reference that grows with the
|
|
code (Chapter~\ref{ch:classes}), and how to build and flash
|
|
(Chapter~\ref{ch:build}). The exact register-level programming of each
|
|
chip lives in the source code and its generated API documentation; this
|
|
manual explains the design and the reasoning behind it.
|
|
|
|
\section{Licensing summary}
|
|
|
|
The hardware is licensed under CERN-OHL-S v2 and the firmware under
|
|
Apache-2.0; full details are in Chapter~\ref{ch:licensing}. The project
|
|
repository is at \url{https://github.com/manvalan/DigiRadio}.
|