WSAL22668 – RP2040-LCD-1.28/en

Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The RP2040-LCD-1.28 is a compact MCU board featuring a 1.28-inch round LCD (GC9A01A, 240×240, SPI), a QMI8658 accelerometer/gyroscope sensor, Li-ion battery connector and USB-C. It is based on the Raspberry Pi RP2040 chip with dual Cortex-M0+ cores, 2 MB flash and 264 KB SRAM.

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Technical overview

Microcontroller: Raspberry Pi RP2040, dual-core Arm Cortex-M0+, up to 133 MHz, 264 KB SRAM, 2 MB flash
Display: 1.28-inch round IPS LCD, controller GC9A01A, 240×240 resolution, SPI interface, display size Φ32.4 mm
Motion sensor: QMI8658 with 16-bit resolution; accelerometer ±2/±4/±8/±16 g, gyroscope ±16 to ±2048 °/s
Interfaces: 2×SPI, 2×I2C, 2×UART, 4×12-bit ADC, 16 PWM channels, 8 PIO state machines
Connector: USB Type-C, supports USB 1.1 as device and host
Battery: Li-ion battery charge/discharge header for mobile use
GPIO: 30 pins via 1.27 mm pitch headers; some pins are internally wired, note this when multiplexing
Programming: drag-and-drop via mass storage over USB; firmware download available for MicroPython, C/C++ (VS Code Pico extension) or Arduino IDE

Notes and version constraints

The exact GPIO mapping of internal wiring must be verified in the wiki before multiplexing.
Flashing firmware requires holding the BOOT button while connecting to the PC; incorrect procedure may cause the device to go unrecognized.
Windows 7 may lack a driver for the COM port; the source points to external GitHub resources.
Using QMI8658 in MicroPython requires manually saving a library file to the device; it is not included in the standard firmware.
Version-specific steps for compiling and flashing (e.g., toolchain choice for ARM vs. RISC-V) depend on the selected SDK version and require prior confirmation.

Source and revision record

RP2040-LCD-1.28 - Waveshare Wiki
Source revision: 111067
Captured: 2026-09-03T04:15:32+00:00
SHA-256: 7343cf100330b494e1e8c36dfb44f3702b8f02d12f7050b9f82ed89d81f0910d