added led5

V1/led5/src/main.rs

@@ -0,0 +1,128 @@
+#[macro_use]
+extern crate chan;
+extern crate chan_signal;
+
+use std::io::prelude::*;
+use std::fs::File;
+use std::thread;
+use std::path::Path;
+use std::time::Duration;
+
+use chan_signal::Signal;
+
+// static GPIO_BASE_PATH: &'static str = "/sys/class/gpio";
+// static GPIO_PATH: &'static str = "gpio{}/";
+// static GPIO_EXPORT: &'static str = "export";
+// static GPIO_UNEXPORT: &'static str = "unexport";
+// static GPIO_VALUE: &'static str = "value";
+// static GPIO_DIRECTION: &'static str = "direction";
+
+// static GPIO_BASE_PATH: &'static Path = Path::new("/sys/class/gpio");
+// static GPIO_EXPORT_PATH: &'static Path = GPIO_BASE_PATH.join("export").as_path();
+// static GPIO_UNEXPORT_PATH: &'static Path = GPIO_BASE_PATH.join("unexport").as_path();
+// static GPIO_PATH: &'static Path = GPIO_BASE_PATH.join("gpio{}").as_path();
+// static GPIO_VALUE_PATH: &'static Path = GPIO_PATH.join("value").as_path();
+// static GPIO_DIRECTION_PATH: &'static Path = GPIO_PATH.join("direction").as_path();
+
+// str0 = "asd"
+// str1 = concat!("Test", "Test");
+// str2 concat!(str1, "test");
+
+static GPIO_PORT_BTN: &'static str = "17";
+static GPIO_PORT_LED: &'static str = "18";
+
+static GPIO_DIRECTION_IN: &'static str = "in";
+static GPIO_DIRECTION_OUT: &'static str = "out";
+
+static GPIO_BTN_ON: &'static str = "0";
+//static GPIO_BTN_OFF: &'static str = "1";
+
+static GPIO_LED_ON: &'static str = "0";
+static GPIO_LED_OFF: &'static str = "1";
+
+fn open(path: &str) -> File {
+    return File::open(Path::new(path))
+        .expect(format!("Open file '{}' failed", path).as_str());
+}
+
+fn write(path: &str, value: &str) {
+    let mut file = open(path);
+
+    file.write_all(value.as_bytes())
+        .expect(format!("Write value '{}' to '{}' file failed", value, path).as_str());
+}
+
+fn read(path: &str) -> String {
+    let mut file = open(path);
+    let mut contents = String::new();
+
+    file.read_to_string(&mut contents)
+        .expect(format!("Read from '{}' file failed", path).as_str());
+
+    contents
+}
+
+fn export(port: &str) {
+    write("/sys/class/gpio/export", port)
+}
+fn unexport(port: &str) {
+    write("/sys/class/gpio/unexport", port)
+}
+
+fn set_direction(port: &str, direction: &str) {
+    write(format!("/sys/class/gpio/gpio{}/direction", port).as_str(), direction);
+}
+
+fn set_value(port: &str, value: &str) {
+    write(format!("/sys/class/gpio/gpio{}/value", port).as_str(), value);
+}
+
+fn get_value(port: &str) -> String {
+    read(format!("/sys/class/gpio/gpio{}/value", port).as_str())
+}
+
+fn main() {
+    let signal = chan_signal::notify(&[Signal::INT, Signal::TERM]);
+    let (sdone, rdone) = chan::sync(0);
+    thread::spawn(move || run(sdone));
+
+    // Wait for a signal or for work to be done.
+    chan_select! {
+        signal.recv() -> signal => {
+            println!("received signal: {:?}", signal);
+            unexport(GPIO_PORT_BTN);
+            unexport(GPIO_PORT_LED);
+        },
+        rdone.recv() => {
+            println!("Program completed normally.");
+        }
+    }
+}
+fn run(_sdone: chan::Sender<()>) {
+    // init
+    export(GPIO_PORT_BTN);
+    export(GPIO_PORT_LED);
+    set_direction(GPIO_PORT_BTN, GPIO_DIRECTION_IN);
+    set_direction(GPIO_PORT_LED, GPIO_DIRECTION_OUT);
+
+    let mut on = false;
+
+    loop {
+        let btn = get_value(GPIO_PORT_BTN);
+
+        if btn == GPIO_BTN_ON {
+            on = !on;
+        } else {
+            on = false;
+        }
+
+        if on {
+            set_value(GPIO_PORT_LED, GPIO_LED_ON);
+        }
+        else {
+            set_value(GPIO_PORT_LED, GPIO_LED_OFF);
+        }
+
+        thread::sleep(Duration::from_secs(1 / 5));
+    }
+}