https://github.com/jana-marie/otterpill
stm32f072 dev board with arduino nano alike pinout
https://github.com/jana-marie/otterpill
arduino devboard dfu firmware oshw otter otterpill pcb stm32 stm32f072
Last synced: 15 days ago
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stm32f072 dev board with arduino nano alike pinout
- Host: GitHub
- URL: https://github.com/jana-marie/otterpill
- Owner: Jana-Marie
- License: other
- Created: 2019-05-05T15:09:20.000Z (about 6 years ago)
- Default Branch: main
- Last Pushed: 2024-07-07T17:54:28.000Z (11 months ago)
- Last Synced: 2025-03-31T11:21:12.060Z (about 2 months ago)
- Topics: arduino, devboard, dfu, firmware, oshw, otter, otterpill, pcb, stm32, stm32f072
- Language: C
- Homepage:
- Size: 45.8 MB
- Stars: 158
- Watchers: 23
- Forks: 19
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.md
Awesome Lists containing this project
README
# OtterPill
OtterPill is a 3$ STM32F072 devboard featuring USB 2.0 full-speed, a DFU Bootloader, a USB-PD Phy and Arduino nano alike pinout and size.
Changelog V1.2: BOM cost reduction by ~40%, PCB can be fully populated by JLCSMT, more efficient buck converter (PCB gets less warm at 20V), GND-hook for probing, Reset-Pin exposed as pad, power pads for 20V/5A
**How do I get an OtterPill?**
Via [tindie](https://www.tindie.com/products/jan_henrik/otterpill/) (if sold out DM via Twitter, I might have a few left ;))
## Building, Flashing and Frameworks
### Via Makefile and DFU (C, C++)
Or you can generate a basic firmware, with HAL init and Makefile, with CubeMX. The binary can then be build with make and flashed with dfu-utils. To enter DFU mode, press and hold the Button while plugging in power.
$ make
$ dfu-util -a 0 -s 0x08000000:leave -D build/firmware.bin
### Via Arduino
[You can build and flash the firmware via Arduino as described here.](https://github.com/stm32duino/Arduino_Core_STM32)
### Via PlatformIO
[https://gist.github.com/ansemjo/ab1c12f7c78abb140f7272501aff2a55](https://gist.github.com/ansemjo/ab1c12f7c78abb140f7272501aff2a55) Thank you [ansemjo](https://github.com/ansemjo) :3
### Via Nodate (野点) (C++, Ada)
[https://github.com/MayaPosch/Nodate](https://github.com/MayaPosch/Nodate)
### Rust
Thank you [@jamesmunns](https://github.com/jamesmunns)! :3
[https://github.com/jamesmunns/OtterPill-rs](https://github.com/jamesmunns/OtterPill-rs)
## Schematic
[HW v1.2/OtterPill.pdf](HW%20v1.2/OtterPill.pdf)
## Pinout
Pinout by [SarahhhhFoster](https://github.com/SarahhhhFoster) :)
## Examples and projects
### Blink example firmware
[Blink/](Blink/)
### STM workshop based on OtterPill
[https://github.com/Jana-Marie/hackerhotel-stm-workshop](https://github.com/Jana-Marie/hackerhotel-stm-workshop)
### USB-PD example firmware
This is a working USB-PD example using ChibiOS, a new voltage can be requested by pressing the Button.
[https://github.com/Jana-Marie/USB-PD-Firmware](https://github.com/Jana-Marie/USB-PD-Firmware)
### IBM dials retrofit
[https://github.com/Jana-Marie/IBM-dials-retrofit](https://github.com/Jana-Marie/IBM-dials-retrofit)
## Shields and addons
Most Arduino shields should be compatible.
#### [USB-to-CAN-adapter](https://github.com/Jana-Marie/OtterPill-CAN-Adapter)
## Todo for HW v1.3
- [x] Replace U1 with ESDU5V0H4
- [x] ~~Add a TVS Diode to VBUS (e.g. SJD12A22L01)~~ -> Added series resistor to reduce ringing
- [ ] Remove R8, R9
- [x] ~~Redraw the FUSB302B Symbol~~ -> forgot why, works great
- [x] ~~Consider switching to STUSB4500 (Easier PD requesting, same price)~~ -> FUSB works great, no need to change
- [x] Add VBUS ADC
## Special thanks
[@jamesmunns](https://github.com/jamesmunns) for creating the Rust examples.
[@MayaPosch](https://github.com/MayaPosch) for creating the Nodate framework and adding the OtterPill.
[@ansemjo](https://github.com/ansemjo) for creating a PlatformIO configuration.
[@SarahhhhFoster](https://github.com/SarahhhhFoster) for creating the awesome pinout diagram.
## Images
### Rev 1.2
### License
Copyright Jana Marie Hemsing 2027.
This source describes Open Hardware and is licensed under the CERN-OHL-S v2.
You may redistribute and modify this source and make products using it under
the terms of the CERN-OHL-S v2 (https://ohwr.org/cern_ohl_s_v2.txt).
This source is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY,
INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A
PARTICULAR PURPOSE. Please see the CERN-OHL-S v2 for applicable conditions.
Source location: https://github.com/Jana-Marie/OtterPill
As per CERN-OHL-S v2 section 4, should You produce hardware based on this
source, You must where practicable maintain the Source Location visible
on the external case of the Gizmo or other products you make using this
source.