Linguaggi e compilatori

Lampadina Wi-Fi Matter in modalità Rust su Raspberry Pi Pico 2 W

08 giugno 2026

Sintesi redazionale: URL dell'articolo: https://github.com/melastmohican/rust-rpico2-embassy-examples URL dei commenti: https://news.ycombinator.com/item?id=48440008 Punti: 66 # Commenti: 4. Fonte originale: https://github.com/melastmohican/rust-rpico2-embassy-examples

This repository contains examples for the Raspberry Pi Pico 2 (RP2350) board, written in Rust using the Embassy async framework.🎉 Featured on the Adafruit blog (June 2026).`cargo generate --git https://github.com/ImplFerris/pico2-template.git --name rust-rpico2-embassy-examples`**Board:** Raspberry Pi Pico 2**MCU:**RP2350 (Dual-core Arm Cortex-M33 and RISC-V cores)**On-board peripherals:**- LED on GPIO25**I2C pins:****I2C0 SDA:**GPIO4**I2C0 SCL:**GPIO5**I2C1 SDA:**GPIO2**I2C1 SCL:**GPIO3**UART pins:****UART0 TX:**GPIO0,**UART0 RX:**GPIO1**UART1 TX:**GPIO8,**UART1 RX:**GPIO9Reads temperature and humidity from an HS3003 sensor using the Embassy async framework.`cargo run --example hs3003_i2c`**Wiring (Arduino Modulino Thermo):**``` Modulino -> RPi Pico 2 ---------- -------------- GND (black) -> GND VCC (red) -> 3.3V SCL (yellow)-> GPIO5 (Pin 7) (I2C0 SCL) SDA (blue) -> GPIO4 (Pin 6) (I2C0 SDA) ```**About HS3003:**The Renesas HS3003 is a high-performance temperature and humidity sensor:- Temperature range: -40°C to +125°C (±0.2°C accuracy) - Humidity range: 0% to 100% RH (±1.5% accuracy) - 14-bit resolution for both measurements - Ultra-low power consumptionReads accelerometer data from an ADXL345 sensor over I2C0 using Embassy.`cargo run --example adxl345_i2c`**Wiring:**``` ADXL345 -> RPi Pico 2 ---------- -------------- GND (black) -> GND VCC (red) -> 3.3V SCL (yellow)-> GPIO5 (Pin 7) (I2C0 SCL) SDA (blue) -> GPIO4 (Pin 6) (I2C0 SDA) ```**About ADXL345:**The ADXL345 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either an SPI (3- or 4-wire) or I2C digital interface.Displays a 320x240 image of Zermatt on the Adafruit 2.2" TFT LCD display in landscape mode.`cargo run --example zermatt`**Wiring (Eye-SPI Breakout):**``` Raspberry Pi Pico 2 Eye-SPI Breakout +-----------------------+ +---------------------------+ | | | | | 3V3 (Pin 36) --------+------+-> VIN (Red Wire) | | GND (Pin 38) --------+------+-> GND (Black Wire) | | GPIO18 (Pin 24) -----+------+-> SCK (Blue Wire) | | GPIO19 (Pin 25) -----+------+-> MOSI (Green Wire) | | GPIO16 (Pin 21) -----+------+-> MISO (Yellow Wire) | | GPIO20 (Pin 26) -----+------+-> DC (White Wire) | | GPIO21 (Pin 27) -----+------+-> RST (Orange Wire) | | GPIO17 (Pin 22) -----+------+-> TCS (Blue Wire) | | | | | +-----------------------+ +---------------------------+ ```Displays a 320x240 image of Zermatt on the Adafruit 2.2" TFT LCD display with animated falling snow, utilizing a physics engine and the Embassy async framework to draw to an off-screen `lcd-async`framebuffer and dispatch via DMA without blocking the CPU.`cargo run --example zermatt_snow`Wiring is identical to the `zermatt`example.The workspace includes examples for the Waveshare 0.96" 80x160 ST7735S LCD module built with both the ** display-driver** async framework (`st7735_dd_*`) and the **driver crate (**`mipidsi``st7735_mipi_*`).**Common Wiring for Waveshare 0.96" ST7735S LCD:**``` Raspberry Pi Pico 2 Waveshare 0.96" ST7735S LCD +-----------------------+ +---------------------------+ | | | | | 3V3 (Pin 36) --------+------+-> VCC | | GND (Pin 38) --------+------+-> GND | | GPIO17 (Pin 22) -----+------+-> CS | | GPIO21 (Pin 27) -----+------+-> RST | | GPIO20 (Pin 26) -----+------+-> DC | | GPIO19 (Pin 25) -----+------+-> DIN(MOSI) | | GPIO18 (Pin 24) -----+------+-> CLK(SCK) | | GPIO14 (Pin 19) -----+------+-> BL (Backlight) | | | | | +-----------------------+ +---------------------------+ ```Draws the Ferris mascot and Rust logo BMP images on the 80x160 ST7735S display using the async `display-driver`crate stack (`display-driver`, `display-driver-spi`, `display-driver-st7735`).`cargo run --example st7735_dd_ferris`Runs a smooth 30 FPS geometric pattern animation (rotating circles, pulsating center ring, and expanding corner accents) rendered into a 160x80 framebuffer and flushed asynchronously via `display-driver`.`cargo run --example st7735_dd_animation`Draws the Ferris mascot and Rust logo BMP images using the `mipidsi`display driver crate and `display-interface-spi`.`cargo run --example st7735_mipi_ferris`Draws text header banners, a separator line, colored geometric shapes, and bottom text labels using `mipidsi`and `display-interface-spi`.`cargo run --example st7735_mipi_text`Runs the **Slint UI framework** in `no_std`mode using its built-in software renderer, rendering an interactive animated Slint component (custom colors, typography, properties, and layout) flushed via `display-driver`.**Slint Website:**https://slint.dev/**Slint Documentation:**https://slint.dev/docs**Slint Software Renderer Docs:**https://slint.dev/docs/rust/slint/platform/software_renderer/index.html`cargo run --example st7735_slint`The workspace includes examples for 240x240 GC9A01 round LCD displays built with both the ** display-driver** async framework (`gc9a01_dd_*`) and the **driver crate (**`mipidsi``gc9a01_mipi_*`).**Common Wiring for GC9A01 240x240 Round LCD:**``` Raspberry Pi Pico 2 GC9A01 240x240 Round LCD +-----------------------+ +---------------------------+ | | | | | 3V3 (Pin 36) --------+------+-> VCC | | GND (Pin 38) --------+------+-> GND | | GPIO17 (Pin 22) -----+------+-> CS | | GPIO21 (Pin 27) -----+------+-> RST | | GPIO20 (Pin 26) -----+------+-> DC | | GPIO19 (Pin 25) -----+------+-> SDA(MOSI) | | GPIO18 (Pin 24) -----+------+-> SCL(SCK) | | | | | +-----------------------+ +---------------------------+ ```**Breadboard Layout:**Draws the Ferris mascot and Rust logo BMP images on the round 240x240 GC9A01 display using the async `display-driver`crate stack (`display-driver`, `display-driver-spi`, `display-driver-gc9a01`).`cargo run --example gc9a01_dd_ferris`Renders a 4x4 Bayer dithered concentric radial gradient (golden-yellow to purple) with a shadow text overlay on the 240x240 GC9A01 display using `display-driver`.`cargo run --example gc9a01_dd_concentric`Draws the Ferris mascot and Rust logo BMP images on the 240x240 GC9A01 display using `mipidsi`and `display-interface-spi`.`cargo run --example gc9a01_mipi_ferris`Reads temperature and pressure from an Adafruit BMP580 sensor over I2C and displays an analog-style thermometer graphic with cycling digital measurements (Fahrenheit, Celsius, pressure hPa, sensor ID) on an Adafruit 1.14" 240x135 ST7789 display using `display-driver`(`display-driver-st7789`).`cargo run --example newxie_dd_thermometer`Async twins of every e-paper example in `rust-rpico2-discovery`— same board, same panels, same wiring, same content and phases; only the transport differs (`embassy-rp`'s async SPI/GPIO instead of `rp235x-hal`'s blocking API, `epdsi`built with `default-features = false, features = ["graphics"]`). See that repo's README for full per-panel narrative (refresh-mode behavior, ink polarity, timing notes, provenance caveats) — not repeated here.Fourteen use the Good Display DESPI-C02 adapter board; four (the Pervasive Displays panels) use the EXT3-1 board with a 10-way rainbow cable.**Wiring (DESPI-C02 adapter board):**| Pico 2 Pin | DESPI-C02 Pin / Function | |---|---| | 3V3 (Pin 36) | VCC | | GND (Pin 38) | GND | | GPIO11 (Pin 15) | RST | | GPIO12 (Pin 16) | DC | | GPIO13 (Pin 17) | BUSY | | GPIO16 (Pin 21) | MISO | | GPIO17 (Pin 22) | CS | | GPIO18 (Pin 24) | SCK | | GPIO19 (Pin 25) | MOSI |**Wiring (EXT3-1/EPDK, 10-way rainbow cable):**| Pico Pin | Cable Color | EXT3 Pin / Function | |---|---|---| | 3V3 (Pin 36) | Black | 1 / VCC | | GPIO18 (Pin 24) | Brown | 2 / SCK (SPI Clock) | | GPIO13 (Pin 17) | Red | 3 / BUSY | | GPIO12 (Pin 16) | Orange | 4 / DC (Data/Cmd) | | GPIO11 (Pin 15) | Yellow | 5 / RST (Reset) | | GPIO16 (Pin 21) | Green | 6 / MISO | | GPIO19 (Pin 25) | Blue | 7 / MOSI | | NC | Violet | 8 / FCSM (Flash CS, unused) | | GPIO17 (Pin 22) | Grey | 9 / ECSM (Display CS) | | GND (Pin 38) | White | 10 / GND |EXT3-1 J3 jumper:OPEN (10 µH) for panels ≤ 3.7" (`E2266KS0C1`,`E2290KS0F1`,`E2154QS0F1`); CLOSED (47 µH) for`E2417QS0A3`(4.2"). Wrong setting chokes the DC-DC booster on current bursts, causing voltage sags and BUSY hangs.Good Display ZJY122250-0213AJH-E5 2.13" Quad-Color (Black/White/Yellow/Red, 122×250), `Jd79661Controller`. Wiring: DESPI-C02, above.`cargo run --example epdsi_jd79661_zjy122250`Good Display GDEM0154F51H 1.54" Quad-Color (Black/White/Yellow/Red, 200×200, Waveshare *1.54inch e-Paper (G)*), `Jd79660Controller`— shares its SPI register table with `Jd79661Controller`(both wrap `Jd7966xController`), differing only in which registers `init_sequence`writes. Wiring: DESPI-C02, above.Not independently confirmed on hardware in this repo or in`rust-rpico2-discovery`'s own doc for the blocking twin — build and flash to verify before relying on it.`cargo run --example epdsi_jd79660_gdem0154f51h`Dalian Good Display GDEM0154Z90 1.54" Tri-Color (200×200), `Ssd1681Controller`. Full Tri-Color content plus a partial *window* refresh loop — no fast/differential waveform on this panel, every update takes ~14 s. Wiring: DESPI-C02, above.`cargo run --example epdsi_ssd1681_gdem0154z90`Full-parity companion to `epdsi_ssd1681_gdem0154z90`— same content, same hardware — drawn entirely through `PageBufferPair`/`TriColor`instead of two separate `PageBuffer`s. Wiring: DESPI-C02, above.`cargo run --example epdsi_ssd1681_gdem0154z90_tri_epd`Dalian Good Display GDEM0213B74 2.13" Monochrome (122×250), `Ssd1680Controller`. Full refresh, then a fast *differential* partial-window logo-swap loop, then a full-waveform cleanup pass. Wiring: DESPI-C02, above.`cargo run --example epdsi_ssd1680_gdem0213b74`Good Display GDEY0266Z90 2.66" Tri-Color (Black/White/Red, 152×296), `Ssd1680Controller`. Demonstrates every refresh mode the SSD1680 exposes for a Tri-Color panel: `Full`, a partial window loop, `FastFull`, and `BaseMap`/`Partial`at their real (non-differential on colour glass) cost. Wiring: DESPI-C02, above.`cargo run --example epdsi_ssd1680_gdey0266z90`Full-parity companion to `epdsi_ssd1680_gdey0266z90`— drawn entirely through `PageBufferPair`/`TriColor`. Wiring: DESPI-C02, above.`cargo run --example epdsi_ssd1680_gdey0266z90_tri_epd`Good Display GDEY0266T90 / Waveshare 2.66" e-Paper, Monochrome (152×296), `Ssd1680Controller`— a different, monochrome-only glass from the Tri-Color `GDEY0266Z90`above, same nominal size and controller. Genuinely fast: real Full and Partial (differential) refresh. Wiring: DESPI-C02, above.`cargo run --example epdsi_ssd1680_gdey0266t90`Companion to `epdsi_ssd1680_gdey0266t90`— drives the panel's 4-level grayscale mode (White/Light/Dark/Black) instead of plain monochrome. `GDEY0266T90::GRAY4`is Adafruit_EPD-sourced, not Good Display/Waveshare material. Wiring: DESPI-C02, above.`cargo run --example epdsi_ssd1680_gdey0266t90_gray4`Dalian Good Display GDEY037T03 3.7" Monochrome (240×416), `Uc8253Controller`. Full refresh, a partial-window logo-swap loop, and a full-waveform cleanup pass. BUSY is active-**low** on this controller. Wiring: DESPI-C02, above.`cargo run --example epdsi_uc8253_gdey037t03`Waveshare 3.52" e-Paper (B) SE0352N14-TNG-A0 Tri-Color (240×360), `Uc8253Controller`with `Uc8253Variant::Se0352n14`— the variant is not optional: this panel disagrees with `GDEY037T03`on RAM plane routing and ink polarity despite sharing the same controller. Full refresh only (~16-20 s); do not loop, Waveshare specify ≥180 s between refreshes. Wiring: DESPI-C02, above.`cargo run --example epdsi_uc8253_se0352n14`Full-parity companion to `epdsi_uc8253_se0352n14`— drawn entirely through `PageBufferPair`/`TriColor`; uses `PlanePolarity::UC8253`_(testo troncato)_