Waveshare RP2350-PiZero / RP2040-PiZero Entwicklungsboard – Benutzerhandbuch

1. Zu Endeview

The Waveshare RP2350-PiZero and RP2040-PiZero are high-performance, cost-effective microcontroller development boards. Designed for ease of development and embedding into various products, these boards feature an onboard DVI interface, Micro SD card holder, and PIO-USB interface. They are compatible with the Raspberry Pi 40PIN GPIO interface, offering extensive connectivity for your projects.

Figure 1: Waveshare RP2350-PiZero Development Board

2. Hauptmerkmale

• Mikrocontroller: RP2040 chip designed by Raspberry Pi (for RP2040-PiZero) or RP2350B (for RP2350-PiZero).
• Prozessor: Dual-core Arm Cortex M0+ processor, with a flexible clock running up to 133 MHz.
• Erinnerung: 264KB of SRAM and 16MB of onboard Flash memory.
• Konnektivität:
  • Onboard DVI interface (Mini HDMI package) for connecting to DVI monitors.
  • Onboard Micro SD Card Slot for reading and writing Micro SD cards (supports SPI, SDIO communication).
  • PIO-USB interface, usable as both USB master and slave.
  • Native USB Type-C port for program download and USB1.1 host/slave devices.
  • 40-pin GPIO interface, compatible with some Raspberry Pi HAT expansion boards.
• Leistung: Onboard lithium battery charge and discharge interface (PH2.0 connector for 3.7V battery).
• Programmierung: Drag-and-drop programming via mass storage over USB.
• Leistungsmodi: Energiesparender Schlaf- und Ruhemodus.
• Peripheriegeräte: 2 x SPI, 2 x I2C, 2 x UART, 4 x 12-bit ADC, and 16 controllable PWM channels.
• Zusätzlich: Accurate clock and timer on-chip, temperature sensor, accelerated floating-point libraries on-chip, 8 × Programmable I/O (PIO) state machines for custom peripheral support.

Abbildung 2: Hauptmerkmale im Überblickview

3. Produktvarianten

This manual covers two variants of the PiZero development board:

• RP2040-PiZero: Based on the Raspberry Pi RP2040 microcontroller.
• RP2350-PiZero: Based on the Raspberry Pi RP2350B microcontroller.

Note: The RP2040-PiZero and RP2350-PiZero are not Raspberry Pi Zero boards and cannot run Linux.

Figure 3: RP2040-PiZero Variant

4. Komponentenidentifikation

4.1 RP2350-PiZero

Figure 4: RP2350-PiZero Component Layout

1. RP2350B: Dual-core, dual-architecture processor, running up to 150MHz clock speed.
2. Native USB Type-C port: Used to download programs and supports USB1.1 host and slave devices.
3. PIO-USB Interface: Can be used as USB host or slave through PIO.
4. DVI interface (Mini HDMI package): Use HDMI cable to drive DVI monitor.
5. Micro-SD-Kartensteckplatz: Supports SPI, SDIO communication.
6. 16MB NOR-Flash.
7. PSRAM Interface: Compatible with mainstream PSRAM chips for user expansion and upgrade.
8. RUN button: Reset-Taste.
9. BOOT-Taste: Press during reset to enter download mode.
10. Lithium battery interface: PH2.0 connector, can be used to connect 3.7V lithium battery, supports charging and discharging.
11. 40-pin GPIO interface: Compatible with some Raspberry Pi HAT expansion boards.
12. Debug interface.

4.2 RP2040-PiZero

Figure 5: RP2040-PiZero Component Layout

1. USB Typ C: Main USB port.
2. PIO-USB interface.
3. Mini HDMI interface.
4. Micro SD Card Slot.
5. RP2040 Chip.
6. W25Q128JV: Flash memory.
7. RUN interface: Reset-Taste.
8. BOOT interface: Button to enter bootloader mode.
9. Lithium battery interface.
10. 40PIN GPIO interface.

5. Spezifikationen

Abbildung 6: Umrissabmessungen

6. Einrichtungsanweisungen

6.1 Erstes Einschalten

1. Connect the board to a computer using a USB Type-C cable via the Native USB Type-C port.
2. Alternatively, connect a 3.7V lithium battery to the PH2.0 lithium battery interface for portable power.

6.2 Anschließen von Peripheriegeräten

• Anzeige: Use a Mini HDMI to DVI cable to connect the DVI interface to a DVI-compatible monitor.
• USB-Geräte: Connect USB peripherals (e.g., keyboard, mouse) to the PIO-USB interface.
• Micro SD Karte: Insert a formatted Micro SD card into the Micro SD card slot for storage.
• GPIO Expansion: Connect compatible Raspberry Pi HATs or custom circuits to the 40-pin GPIO interface.

Abbildung 7: Bspample Setup with Peripherals

Figure 8: Display Connection Examples (LCDs not included)

7. Bedienungsanleitung

7.1 Programmierumgebung

The development boards support programming in C/C++, MicroPython, and Arduino. Comprehensive SDKs, development resources, and tutorials are available to help you get started.

Important: HDMI (DVI) and USB functions can only be realized in a C language environment and can only be used separately (not simultaneously).

7.2 Uploading Programs

1. Connect the board to your computer via the Native USB Type-C port.
2. Press and hold the BOOT button, then press the RUN button (reset). Release the BOOT button. The board will enter USB mass storage mode.
3. Drag and drop your compiled program file (e.g., .uf2 for MicroPython) onto the detected USB drive. The board will automatically reboot and run the new program.

7.3 Grundlegende Bedienung

• Zurücksetzen: Press the RUN button to reset the board and restart the current program.
• Energiesparmodi: Utilize the low-power sleep and dormant modes in your code to conserve energy for battery-powered applications.

8. Wartung

• Keep the board in a dry, static-free environment.
• Setzen Sie die Platine keinen extremen Temperaturen oder hoher Luftfeuchtigkeit aus.
• Clean the board gently with a soft, dry cloth if necessary. Do not use liquids or solvents.
• Ensure proper ventilation when the board is in operation, especially if enclosed.

9. Fehlerbehebung

• Platine wird vom Computer nicht erkannt:
  • Ensure the USB cable is securely connected to both the board's Native USB Type-C port and the computer.
  • Versuchen Sie es mit einem anderen USB-Kabel oder einem anderen USB-Anschluss an Ihrem Computer.
  • Verify the board is in bootloader mode (press BOOT, then RUN, then release BOOT).
• Program not running after upload:
  • Check your code for errors.
  • Ensure the correct firmware (e.g., MicroPython .uf2 file) is being uploaded.
  • Perform a hard reset by pressing the RUN button.
• No display output via DVI:
  • Confirm the DVI interface is correctly connected to a DVI monitor using an HDMI to DVI cable.
  • Ensure your program is configured to output to the DVI interface and is written in C language, as this functionality is C-specific.
  • Check the monitor's input source selection.
• PIO-USB device not working:
  • Verify your code correctly initializes and manages the PIO-USB interface.
  • Ensure the connected USB device is compatible and drawing appropriate power.
  • Remember that USB functions are typically C-language specific and may not operate simultaneously with DVI.

10. Benutzertipps

• When working with the RP2350-PiZero, be aware that users have inquired about the chip revision (e.g., A4). While not always critical for basic use, advanced users might want to verify this for specific compatibility or performance expectations.
• For complex projects involving DVI or advanced USB peripherals, prioritize development in C/C++ to leverage the full capabilities of the board's hardware.
• The Micro SD card slot is excellent for expanding storage for data logging, larger programs, or asset storage for display applications.
• Experiment with the PIO state machines for custom peripheral emulation or high-speed bit-banging, which can be very powerful for unique applications.

11. Häufig gestellte Fragen (FAQ)

Q: What operating system is compatible with these boards?

A: These are microcontroller development boards, not single-board computers like a Raspberry Pi Zero. They do not run a full operating system like Linux. You program them directly using firmware developed in C/C++, MicroPython, or Arduino environments.

Q: Can I only use Python scripts for everything?

A: No, you can program these boards using C/C++, MicroPython, or Arduino. While MicroPython allows for Python scripting, C/C++ offers more direct hardware control and is necessary for certain advanced features like DVI and some USB functionalities.

Q: Can I connect a 4G dongle or a thermal camera to it?

A: The board features a PIO-USB interface that can act as a USB host. Theoretically, you might be able to connect certain USB devices like a 4G dongle or a thermal camera, provided you write the necessary drivers and firmware in C/C++ to support them. Compatibility will depend heavily on the specific device and your programming expertise. It's not a plug-and-play feature like on a full-fledged computer.

12. Garantie und Support

For technical support, documentation, and further resources, please refer to the official Waveshare website or contact their customer support. Information regarding specific warranty terms and conditions can also be found on the manufacturer's webWebsite.