feat: 实现流光效果。

.cargo/config.toml

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+[build]
+# Uncomment the relevant target for your chip here (ESP32, ESP32-S2, ESP32-S3 or ESP32-C3)
+#target = "xtensa-esp32-espidf"
+#target = "xtensa-esp32s2-espidf"
+#target = "xtensa-esp32s3-espidf"
+target = "riscv32imc-esp-espidf"
+
+[target.xtensa-esp32-espidf]
+linker = "ldproxy"
+
+[target.xtensa-esp32s2-espidf]
+linker = "ldproxy"
+
+[target.xtensa-esp32s3-espidf]
+linker = "ldproxy"
+
+[target.riscv32imc-esp-espidf]
+linker = "ldproxy"
+
+# Future - necessary for the experimental "native build" of esp-idf-sys with ESP32C3
+# See also https://github.com/ivmarkov/embuild/issues/16
+rustflags = ["-C", "default-linker-libraries"]
+
+[unstable]
+
+build-std = ["std", "panic_abort"]
+#build-std-features = ["panic_immediate_abort"] # Required for older ESP-IDF versions without a realpath implementation
+
+[env]
+# Note: these variables are not used when using pio builder
+# Enables the esp-idf-sys "native" build feature (`cargo build --features native`) to build against ESP-IDF stable (v4.4)
+#ESP_IDF_VERSION = { value = "branch:release/v4.4" }
+# Enables the esp-idf-sys "native" build feature (`cargo build --features native`) to build against ESP-IDF master (mainline)
+ESP_IDF_VERSION = { value = "master" }
+

.gitignore

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+/.vscode
+/.embuild
+/target
+/Cargo.lock

Cargo.toml

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+[package]
+authors = ["Ivan Li <ivanli2048@gmail.com>"]
+edition = "2018"
+name = "esp32-c3-ws2812-leds"
+resolver = "2"
+version = "0.0.1"
+
+[profile.release]
+opt-level = "s"
+
+[profile.dev]
+debug = true # Symbols are nice and they don't increase the size on Flash
+opt-level = "z"
+
+[features]
+pio = ["esp-idf-sys/pio"]
+
+[dependencies]
+# anyhow = {version = "1.0.57", features = ["backtrace"]}
+# embedded-graphics = "0.7.1"
+embedded-hal = "1.0.0-alpha.8"
+# embedded-hal-0-2 = {package = "embedded-hal", version = "0.2.7", features = ["unproven"]}
+embedded-svc = "0.21.3"
+# env_logger = "0.9.0"
+esp-idf-hal = { git = "https://github.com/esp-rs/esp-idf-hal", branch="master" }
+esp-idf-svc = { git = "https://github.com/IvanLi-CN/esp-idf-svc", branch="master" }
+esp-idf-sys = {version = "0.31.5", features = ["binstart"]}
+# log = "0.4.17"
+# retry = "1.3.1"
+smart-leds = "0.3.0"
+ws2812-esp32-rmt-driver = "0.3.1"
+[build-dependencies]
+anyhow = "1.0.57"
+embuild = "0.29.1"

build.rs

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+// Necessary because of this issue: https://github.com/rust-lang/cargo/issues/9641
+fn main() -> anyhow::Result<()> {
+    embuild::build::CfgArgs::output_propagated("ESP_IDF")?;
+    embuild::build::LinkArgs::output_propagated("ESP_IDF")
+}

rust-toolchain.toml

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+[toolchain]
+
+channel = "nightly-2022-06-03"

sdkconfig.defaults

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+# Rust often needs a bit of an extra main task stack size compared to C (the default is 3K)
+CONFIG_ESP_MAIN_TASK_STACK_SIZE=7000
+
+# Use this to set FreeRTOS kernel tick frequency to 1000 Hz (100 Hz by default).
+# This allows to use 1 ms granuality for thread sleeps (10 ms by default).
+#CONFIG_FREERTOS_HZ=1000
+
+# Workaround for https://github.com/espressif/esp-idf/issues/7631
+CONFIG_MBEDTLS_CERTIFICATE_BUNDLE=n
+CONFIG_MBEDTLS_CERTIFICATE_BUNDLE_DEFAULT_FULL=n

src/main.rs

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+#![feature(is_some_with)]
+#![feature(core_intrinsics)]
+use smart_leds::hsv::{hsv2rgb, Hsv};
+use smart_leds::SmartLedsWrite;
+use std::thread::sleep;
+use std::{env,time::Duration};
+use ws2812_esp32_rmt_driver::Ws2812Esp32Rmt;
+use esp_idf_sys::*;
+fn main() {
+    env::set_var("DEFMT_LOG", "trace");
+    env::set_var("RUST_LOG", "trace");
+    // env_logger::init();
+    // Temporary. Will disappear once ESP-IDF 4.4 is released, but for now it is necessary to call this function once,
+    // or else some patches to the runtime implemented by esp-idf-sys might not link properly.
+    esp_idf_sys::link_patches();
+
+    let mut ws2812 = Ws2812Esp32Rmt::new(0, 1).unwrap();
+
+    println!("Start NeoPixel rainbow!");
+
+    let mut hue = unsafe { esp_random() } as u8;
+    loop {
+        let pixels = (0..60).map(|i: u8| {
+            let hue = hue.wrapping_add(i.wrapping_mul(4));
+            let sat = 170;
+            let val = 250;
+            let rgb = hsv2rgb(Hsv { hue, sat, val });
+            rgb
+        });
+        ws2812.write(pixels).unwrap();
+
+        sleep(Duration::from_millis(20));
+
+        hue = hue.wrapping_add(1);
+    }
+}