1 files changed, 50 insertions, 0 deletions
diff --git a/examples/driveoutput.rs b/examples/driveoutput.rs
new file mode 100644
index 0000000..1e2be61
--- /dev/null
+++ b/examples/driveoutput.rs
@@ -0,0 +1,50 @@
+// 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 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,
+    /// The value to write
+    value: u8,
+}
+
+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. The LineHandle
+    // instance that is returned by request must be owned by a
+    // variable for the duration of the time that the line will
+    // be used. If the instance is not assigned to a variable,
+    // then the LineHandle will be immediately dropped after
+    // request returns and the pin will appear to do nothing.
+    let _handle =
+        chip.get_line(args.line)?
+            .request(LineRequestFlags::OUTPUT, args.value, "driveoutput")?;
+
+    println!("Output being driven... Enter to exit");
+    let mut buf = String::new();
+    ::std::io::stdin().read_line(&mut buf)?;
+
+    Ok(())
+}
+
+fn main() -> CliResult {
+    let args = Cli::from_args();
+    do_main(args).or_else(|e| {
+        error!("{:?}", e);
+        Ok(())
+    })
+}