1 files changed, 54 insertions, 0 deletions
diff --git a/examples/blinky.rs b/examples/blinky.rs
new file mode 100644
index 0000000..8578648
--- /dev/null
+++ b/examples/blinky.rs
@@ -0,0 +1,54 @@
+// Copyright (c) 2018 The rust-gpio-cdev Project Developers.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use gpio_cdev::{Chip, LineRequestFlags};
+use quicli::prelude::*;
+use std::thread::sleep;
+use std::time::{Duration, Instant};
+use structopt::StructOpt;
+
+#[derive(Debug, StructOpt)]
+struct Cli {
+    /// The gpiochip device (e.g. /dev/gpiochip0)
+    chip: String,
+    /// The offset of the GPIO line for the provided chip
+    line: u32,
+    /// Period in milliseconds
+    period_ms: u64,
+    /// Duration over which to blink in milliseconds
+    duration_ms: u64,
+}
+
+fn do_main(args: Cli) -> std::result::Result<(), gpio_cdev::Error> {
+    let mut chip = Chip::new(args.chip)?;
+
+    // NOTE: we set the default value to the desired state so
+    // setting it separately is not required
+    let handle = chip
+        .get_line(args.line)?
+        .request(LineRequestFlags::OUTPUT, 1, "blinky")?;
+
+    let duration = Duration::from_millis(args.duration_ms);
+    let start_time = Instant::now();
+    while start_time.elapsed() < duration {
+        sleep(Duration::from_millis(args.period_ms));
+        handle.set_value(0)?;
+        sleep(Duration::from_millis(args.period_ms));
+        handle.set_value(1)?;
+    }
+
+    Ok(())
+}
+
+fn main() -> CliResult {
+    let args = Cli::from_args();
+    do_main(args).or_else(|e| {
+        error!("{:?}", e);
+        Ok(())
+    })
+}