δΈζ | English
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## π Project Introduction
**Power-Pico** is more than just a USB ammeter. It is a **high-precision, low-power analysis tool** designed specifically for embedded developers. To overcome the physical limitations of traditional ammeters in the ΞΌA-level measurement, Power-Pico adopts an innovative **multi-range auto-switching sampling** design, achieving full-range coverage from $1\mu A$ to $5A$.
my bilibili |
demo video |
hardware open source
### β¨ Core Features
- **ΞΌA-Level High Precision**: Utilizes the INA190 zero-drift amplifier with three-resistor segmented sampling.
- **Protocol Trigger**: Supports PD2.0 PPS protocol triggering, with up to 20V/5A output.
- **High-Performance UI**: Based on STM32F411 + LVGL v8.3, providing a smooth real-time waveform display.
- **Cross-Platform PC Client**: Comes with the Power-Pico Client developed with PySide6, supporting data export and real-time power analysis.
- **3D Printed Enclosure**: Provides a complete design for a 3D printed enclosure and acrylic panel.
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## π οΈ Hardware Parameter Analysis
| Module | Model | Advantage |
| :--- | :--- | :--- |
| **MCU** | STM32F411CEU6 | 100MHz high frequency, supports DSP instructions to accelerate waveform processing |
| **Current Sensing** | INA190 | 0.5nA input bias current, the core guarantee for ΞΌA-level measurement |
| **ADC** | 12-bit (STM32 Internal) | Achieves high-speed stable sampling above 10kHz with DMA |
| **Screen** | 1.54" TFT (ST7789) | 240x240 resolution, high-contrast display |
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## π Quick Replication
### 1. Hardware
Solder the hardware yourself, or purchase a pre-soldered and assembled kit from Taobao.
LCSC Open Source Hub page: https://oshwhub.com/no_chicken/powerpico
### 2. Firmware Compilation and Flashing
The project is developed based on Keil MDK:
1. Clone the repository: `git clone https://github.com/kingham/Power-Pico.git`
2. Flash the BootLoader via the SWD port.
3. Compile PowerPico yourself. The generated `.bin` file can then be flashed using the PowerPico Client.
### 3. Assembly
The physical assembly is shown in the figure below:
The exploded 3D view is as follows:
### 4. Running the PC Client
Install and use the PowerPico Client. Currently, it only supports Windows.
## π οΈ User Guide
1. Hardware Operation
The button operations and various interface displays of Power-Pico are shown below. The top button is the **Page Switch/Boot** button. Press and hold the top button before powering on to enter Boot mode for a forced firmware upgrade.
The Power-Pico hardware currently supports 2 languages: **Simplified Chinese/English**.
2. Client Operation
The PowerPico Client for PC can be used for waveform viewing, recording, exporting, and upgrading the firmware of the hardware. The client currently supports 4 languages: **Simplified Chinese/Traditional Chinese/English/Japanese**.
For detailed instructions on using the PowerPico Client, please refer to: [Client Operation Manual](https://no-chicken.com/content/Power-Pico/UserManual/client_operation.html)
## π Project Structure
```text
Power-Pico/
βββ Firmware/ # Firmware, including BootLoader.hex and App.bin
βββ Hardware/ # Schematics
βββ 3D models/ # STL files for 3D printing the enclosure
βββ Software/ # MDK software project for PowerPico, including BootLoader and App
```
## π» Code Framework
Similar to previous projects, it uses a BootLoader + App structure for easy USB upgrades. The program partitioning is shown below.
- The initial 48kB area of sectors 0, 1, and 2 is the BootLoader area.
- The 16kB area of the 3rd sector is the upgrade information area, used for verifying the integrity of the App on startup. For specific verification details, see the BootLoader code.
- The area starting from the 4th sector at 0x08010000 is the App area (A/B partitioning is not used due to insufficient on-chip Flash).
High-speed data transmission is performed via USB. The data packet structure is shown below. Each packet contains 100 data sets, totaling 711 bytes including the header.
π References
π€ Contribute
Welcome to submit Issues or Pull Requests to add new features to the project or fix code bugs!!
