Waveshare RP2350 2.8-Inch Capacitive Touch Display Development Board

The board is primarily programmed using C/C++ within the official Raspberry Pi Pico SDK, which supports both bare-metal and FreeRTOS environments. It is also compatible with MicroPython for rapid scripting. The integrated display is well-suited for GUI libraries like LVGL (Light and Versatile Graphics Library), which can be ported using the SDK. Programming is simplified via USB Mass Storage Device (MSD) drag-and-drop flashing, eliminating the need for a separate programmer.

The 2.8-inch capacitive touch panel is connected to the RP2350 MCU via an I2C interface and includes an interrupt line for efficient touch event handling. You must initialize the I2C peripheral in your firmware and communicate with the touch controller's specific register set to read touch coordinates. Driver examples are typically provided in the Waveshare wiki or GitHub repository. The touch controller supports 5-point multi-touch, and the interrupt pin can be configured to wake the MCU from sleep on touch.

Yes, the board includes a dedicated lithium battery management IC that handles charging, power-path management, and battery monitoring. You can connect a standard 3.7V Li-ion or Li-Po cell via the provided terminals. The charging current is typically set by a resistor on the board. In your firmware, you can monitor battery voltage via an ADC pin connected to the management IC's output. The RP2350's multiple low-power modes allow you to minimize current draw, extending battery life for portable applications.

The QMI8658 is a 6-axis inertial measurement unit (IMU) combining a 3-axis accelerometer and a 3-axis gyroscope. It is used for motion sensing, orientation detection, and gesture recognition. The sensor communicates over I2C. To use it, you must initialize the I2C bus, write configuration registers to set the sensor's range and output data rate (ODR), and then periodically read the acceleration and gyroscope data registers. Libraries and example code for the QMI8658 are often available from the sensor manufacturer or community repositories.