Add section on RP2040 firmware

lowRISC · May 24, 2024 · a1feabf · a1feabf
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diff --git a/SUMMARY.md b/SUMMARY.md
@@ -27,8 +27,4 @@
   - [Building Documentation](doc/dev/building-doc.md)
 
 - [Sonata Board](doc/architecture/board.md)
-  - [DIP Switch Settings]()
-  - [Updating Firmware]()
-  - [Building RP2040 Firmware]()
-  - [Schematics]()
 
diff --git a/doc/architecture/board.md b/doc/architecture/board.md
@@ -94,3 +94,11 @@ We recommend the following default state for the dipswitches:
     - SW1 : all set to on
     - SW2 : 1-6 set to on and 7-8 set to off
 
+## RP2040 firmware
+
+You can build new RP2040 firmware (or find release UF2 files) from the [Sonata RP2040 repository](https://github.com/newaetech/sonata-rp2040).
+
+With that UF2 file you can now update your firmware by holding down SW9, labelled "RP2040 Boot".
+While holding this button plug your Sonata board in using the main USB.
+A drive called `RPI-RP2` should now appear which you can drag the UF2 file onto.
+