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Request PIDs f540 and f542 for One ROM#1185

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piersfinlayson wants to merge 1 commit intopidcodes:masterfrom
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Request PIDs f540 and f542 for One ROM#1185
piersfinlayson wants to merge 1 commit intopidcodes:masterfrom
piersfinlayson:master

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@piersfinlayson
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@piersfinlayson piersfinlayson commented Mar 18, 2026

Project page: https://onerom.org

Pre-requisites:

Publicly available source code repository:

Containing modifiable PCB design files:

Source code for a device with a USB interface:

Licensed under a recognized open source or open source hardware license:

Edited: 30 Mar 26, PCB files in repo have moved - updated link.

Request PIDs f540 and f541 for One ROM

Request PIDs f540 and f542 for One ROM
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@tannewt tannewt left a comment

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C firmware source and kicad hardware sources look good. One question first.

Comment thread 1209/F540/index.md
@@ -0,0 +1,13 @@
---
layout: pid
title: One ROM Bootloader
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Why do you need a bootloader PID? The RP2350 has a built in bootloader.

@piersfinlayson
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Thanks for reviewing.

What I would like to do is write a custom bootloader VID/PID into the RP2350's OTP memory on first firmware programming. This will help both the user and the One ROM tooling to definitively identify the device as a One ROM when in RP2350 bootloader mode - which is most commonly used for "unbricking" the device.

@piersfinlayson piersfinlayson requested a review from tannewt May 1, 2026 07:30
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2 participants