=============================== Waveshare RP2040 LCD 1.28 =============================== .. tags:: chip:rp2040 The `Waveshare RP2040 LCD 1.28 `_ is a low-cost, high-performance MCU board designed by Waveshare based on RP2040 with onboard 1.28 inch LCD. .. figure:: RP2040-LCD-1.28.jpg :align: center Features ======== * RP2040 MCU chip designed by Raspberry Pi in the United Kingdom * Dual-core Arm Cortex M0+ processor, flexible clock running up to 133 MHz * 264KB of SRAM, and 2MB of onboard Flash memory * Type-C connector, keeps it up to date, easier to use * Onboard 1.28-inch 240 x 240 resolution, 65K RGB IPS LCD display for clear color pictures * Lithium battery recharge/discharge header, suitable for mobile devices * All GPIOs are adapted through 1.27 pitch female headers (There are 30 pins in total, but some pins have been connected to the internal circuit, you need to pay attention when multiplexing, please refer to the wiki for details) * USB 1.1 with device and host support * Low-power sleep and dormant modes * Drag-and-drop programming using mass storage over USB * 2 x SPI, 2 x I2C, 2 x UART, 2 x UART, 4 x 12-bit ADC, 16 x controllable PWM channels * Accurate clock and timer on-chip * Temperature sensor * Accelerated floating-point libraries on-chip * 8 x Programmable I/O (PIO) state machines for custom peripheral support Buttons and LEDs ================ No user LED is provided. A BOOT button, which if held down when pressing RESET or power is first applied to the board, will cause the RP2040 to boot into programming mode and appear as a storage device to a computer connected via USB. Saving a .UF2 file to this device will replace the Flash ROM contents on the RP2040. Pin Mapping =========== ===== ========== ========== Pad Signal Notes ===== ========== ========== 2 GPIO0 Default TX for UART0 serial console 4 GPIO1 Default RX for UART0 serial console ===== ========== ========== Power Supply ============ The Raspberry Pi Pico can be powered via the USB connector, connecting a lithium battery through connector, or by supplying +5V to pin 18(VSYS). The board had a diode that prevents power from pin 18 from flowing back to the USB socket. Power through USB or VSYS will be charging the battery if connected. The schematic is available at `RP2040-LCD-1.28-sch.pdf `_ Installation & Build ==================== For instructions on how to to install the build dependencies and create a NuttX image for this board, consult the main :doc:`RP2040 documentation <../../index>`. Configurations ============== All configurations listed below can be configured using the following command in the ``nuttx`` directory (again, consult the main :doc:`RP2040 documentation <../../index>`): .. code:: console $ ./tools/configure.sh waveshare-rp2040-lcd-1.28: composite --------- NuttShell configuration (console enabled in UART0, at 115200 bps) with support for CDC/ACM with MSC USB composite driver. ``conn`` command enables the composite device. nsh --- Basic NuttShell configuration (console enabled in UART0, at 115200 bps). nsh-flash --------- Basic NuttShell configuration (console enabled in UART0, at 115200 bps with SMART flash filesystem. nshsram ------- NuttShell configuration (console enabled in UART0, at 115200 bps) with interrupt vectors in RAM. smp --- Basic NuttShell configuration (console enabled in UART0, at 115200 bps) with both ARM cores enabled. spisd ----- NuttShell configuration (console enabled in UART0, at 115200 bps) with SPI SD card support enabled. .. list-table:: spisd connections :widths: auto :header-rows: 1 * - SD card slot - Waveshare RP2040 * - DAT2 - Not connected * - DAT3/CS - GP17 (SPI0 CSn) (Pin 22) * - CMD /DI - GP19 (SPI0 TX) (Pin 25) * - VDD - 3V3 OUT (Pin 36) * - CLK/SCK - GP18 (SPI0 SCK) (Pin 24) * - VSS - GND (Pin 3 or 38 or ...) * - DAT0/DO - GP16 (SPI0 RX) (Pin 21) * - DAT1 - Not connected Card hot swapping is not supported. usbmsc ------ NuttShell configuration (console enabled in UART0, at 115200 bps) with support for USB MSC and CDC/ACM. ``msconn`` and ``sercon`` commands enable the MSC and CDC/ACM devices. The MSC support provides the interface to the SD card with SPI, so the SD card slot connection like spisd configuration is required. usbnsh ------ Basic NuttShell configuration using CDC/ACM serial (console enabled in USB Port, at 115200 bps). fb ------------------ NuttShell configuration (console enabled in USB Port, at 115200 bps) with support for gc9a01 and video framebuffer example. lvgl ----------------- NuttShell configuration (console enabled in USB Port, at 115200 bps) with support for gc9a01 and LVGL demo (using lcd_dev).