basic data recorder for later debugging

example/src/bin/recorder.rs

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+use mpu6050::*;
+use mpu6050::Error as Mpu6050Error;
+use linux_embedded_hal::{I2cdev, Delay};
+use i2cdev::linux::LinuxI2CError;
+use std::io::prelude::*;
+use std::fs::File;
+use std::path::Path;
+use std::error::Error;
+
+fn new_file(name: &str) -> File {
+    let path = Path::new(name);
+    let display = path.display();
+    let _file = match File::create(&path) {
+        Err(why) => panic!("couldn't create {}: {}",
+                           display,
+                           why.description()),
+        Ok(file) => return file,
+    };
+}
+
+fn write_x_to(file: &mut File, content: String) {
+    match file.write_all(content.as_bytes()) {
+        Err(why) => {
+            println!("couldn't write to file: {}", why.description());
+        },
+        Ok(_) => {},
+    }
+}
+
+fn main() -> Result<(), Mpu6050Error<LinuxI2CError>> {
+    let i2c = I2cdev::new("/dev/i2c-1")
+        .map_err(Mpu6050Error::I2c)?;
+
+    let delay = Delay;
+
+    let mut mpu = Mpu6050::new(i2c, delay);
+    mpu.init()?;
+
+
+    let mut acc_file = new_file("acc_data.txt");
+    let mut gyro_file = new_file("gyro_data.txt");
+    let mut temp_file = new_file("temp_data.txt");
+    let mut angles_file = new_file("angles_data.txt");
+
+    loop {
+        // get roll and pitch estimate
+        let acc = mpu.get_acc_angles()?;
+        write_x_to(&mut angles_file, format!("{},{}", acc.0, acc.1));
+
+        // get temp
+        let temp = mpu.get_temp()?;
+        write_x_to(&mut temp_file, format!("{}", temp));
+
+        // get gyro data, scaled with sensitivity 
+        let gyro = mpu.get_gyro()?;
+        write_x_to(&mut gyro_file, format!("{} {} {}", gyro.0, gyro.1, gyro.2));
+        
+        // get accelerometer data, scaled with sensitivity
+        let acc = mpu.get_acc()?;
+        write_x_to(&mut acc_file, format!("{} {} {}", acc.0, acc.1, acc.2));
+    }
+}