feat: gpio feature根据操作系统自动判断

Cargo.toml

@@ -6,7 +6,7 @@ authors = ["Meteor Detection Team"]
 description = "A Raspberry Pi based meteor detection system"
 
 [features]
-# 默认features，在Linux上自动包含gpio
+# 默认features
 default = []
 
 # 如果在Linux上运行，则默认启用GPIO support
@@ -14,6 +14,14 @@ default = []
 [target.'cfg(target_os = "linux")'.features]
 default = ["gpio"]
 
+# 树莓派特定target配置
+[target.'cfg(all(target_os = "linux", target_arch = "arm"))'.features]
+default = ["gpio"]
+
+# 64位树莓派target配置
+[target.'cfg(all(target_os = "linux", target_arch = "aarch64"))'.features]
+default = ["gpio"]
+
 # 定义常规的features (全平台通用)
 gpio = ["rppal", "embedded-hal"]  # Feature to enable GPIO functionality
 opencv-4-11-plus = []  # For OpenCV 4.11 and newer versions

build.rs

@@ -8,11 +8,14 @@ fn main() {
     let supports_gpio = detect_gpio_support();
     
     // 设置环境变量，告诉lib.rs是否有实际的GPIO支持
-    // 注意：这只影响PLATFORM_SUPPORTS_GPIO的值，不影响依赖的启用
     if supports_gpio {
         // 设置编译器配置，lib.rs会使用它
         println!("cargo:rustc-env=HAS_GPIO_SUPPORT=true");
         println!("cargo:warning=GPIO support detected, PLATFORM_SUPPORTS_GPIO will be true");
+        
+        // 强制启用gpio feature，确保依赖包含rppal
+        println!("cargo:rustc-cfg=feature=\"gpio\"");
+        println!("cargo:warning=Also enabling gpio feature to include rppal dependency");
     } else if cfg!(target_os = "linux") {
         // 特殊情况：Linux但没有GPIO支持
         println!("cargo:rustc-env=HAS_GPIO_SUPPORT=false");

src/lib.rs

@@ -6,6 +6,10 @@ pub const PLATFORM_SUPPORTS_GPIO: bool = option_env!("HAS_GPIO_SUPPORT").map_or(
 #[cfg(not(feature = "gpio"))]
 pub const PLATFORM_SUPPORTS_GPIO: bool = false;
 
+// 强制在条件编译中使用rppal库，解决编译依赖问题
+#[cfg(all(feature = "gpio", target_os = "linux"))]
+pub use rppal;
+
 // 将所有模块重新导出，使它们对例子可见
 pub mod camera;
 pub mod config;

src/sensors/dht22.rs

@@ -7,6 +7,10 @@ use std::sync::Mutex;
 #[cfg(feature = "gpio")]
 use rppal::gpio::{Gpio, Level, Mode, OutputPin};
 
+// 确保即使启用了gpio feature，但在非Linux平台上也不尝试使用rppal
+#[cfg(all(feature = "gpio", not(target_os = "linux")))]
+compile_error!("GPIO feature enabled but not on Linux platform");
+
 #[cfg(not(feature = "gpio"))]
 use rand::Rng;