Chore: Cleaned up code

src/display/mod.rs

@@ -1,25 +1,21 @@
 use crate::error::Error;
 
+use display_interface_i2c::I2CInterface;
+
 use embedded_graphics::{
-    prelude::*,
-    mono_font::{ascii::FONT_7X13, ascii::FONT_10X20, MonoTextStyle},
+    mono_font::{ascii::FONT_10X20, MonoTextStyle},
     pixelcolor::BinaryColor,
-    text::{Text, Alignment},
+    prelude::*,
+    text::{Alignment, Text},
 };
 
-use esp_idf_hal::{
-    self,
-    prelude::Peripherals, 
-    units::Hertz,
-    i2c::{I2cConfig, I2cDriver, I2c} 
+use esp_idf_hal::i2c::I2cDriver;
+
+use ssd1306::{
+    prelude::*, rotation::DisplayRotation, size::DisplaySize, I2CDisplayInterface, Ssd1306,
 };
 
-use ssd1306::{prelude::*, I2CDisplayInterface, Ssd1306};
-
-use display_interface_i2c;
-
-
-/// Enum to make clear the stage of failure of the display
+// clear the stage of failure of the display
 #[derive(Debug)]
 pub enum DisplayError {
     SetupError(display_interface::DisplayError),
@@ -28,45 +24,46 @@ pub enum DisplayError {
 }
 
 pub struct Display<'a, SIZE: DisplaySize> {
-    display: Ssd1306<I2CInterface<I2cDriver<'a>>, SIZE, ssd1306::mode::BufferedGraphicsMode<SIZE>>
+    display: Ssd1306<I2CInterface<I2cDriver<'a>>, SIZE, ssd1306::mode::BufferedGraphicsMode<SIZE>>,
 }
 
-impl<'a, SIZE: DisplaySize> Display<'a, SIZE>
-{
+impl<'a, SIZE: DisplaySize> Display<'a, SIZE> {
     /// Function to create a new display interface abstraction
-    pub fn new(i2c: I2cDriver<'a>, size: SIZE, rotation: DisplayRotation) -> Result<Display<'a, SIZE>, Error> {
+    pub fn new(
+        i2c: I2cDriver<'a>,
+        size: SIZE,
+        rotation: DisplayRotation,
+    ) -> Result<Display<'a, SIZE>, Error> {
         // Construct the I2C driver into a display interface
         let interface = I2CDisplayInterface::new(i2c);
 
         // Construct display with new anew driver
-        let mut display = Ssd1306::new(interface, size, rotation)
-            .into_buffered_graphics_mode();
-        display.init().map_err(|err| Error::DisplayError(DisplayError::SetupError(err)))?;
+        let mut display = Ssd1306::new(interface, size, rotation).into_buffered_graphics_mode();
+        display
+            .init()
+            .map_err(|err| Error::DisplayError(DisplayError::SetupError(err)))?;
 
-        Ok(Display{display})
+        Ok(Display { display })
     }
 
     /// Function to draw a given set of text to a display
     pub fn draw(&mut self, text: &str) -> Result<(), Error> {
         // Clear display ready for next write
         let style = MonoTextStyle::new(&FONT_10X20, BinaryColor::On);
-        self.display.clear(BinaryColor::Off)
-        .map_err(|_| Error::DisplayError(DisplayError::DrawingError))?;
+        self.display
+            .clear(BinaryColor::Off)
+            .map_err(|_| Error::DisplayError(DisplayError::DrawingError))?;
 
         // Draw text to Display
-        Text::with_alignment(
-            text,
-            Point::new(64, 20),
-            style,
-            Alignment::Center,
-        )
-        .draw(&mut self.display)
-        .map_err(|_| Error::DisplayError(DisplayError::DrawingError))?;
+        Text::with_alignment(text, Point::new(64, 20), style, Alignment::Center)
+            .draw(&mut self.display)
+            .map_err(|_| Error::DisplayError(DisplayError::DrawingError))?;
 
         //Flush data to the display
-        self.display.flush()
-        .map_err(|_| Error::DisplayError(DisplayError::FlushError))?;
+        self.display
+            .flush()
+            .map_err(|_| Error::DisplayError(DisplayError::FlushError))?;
 
         Ok(())
     }
-}
+}

src/main.rs

@@ -14,10 +14,10 @@ use error::Error;
 mod appstate;
 
 mod gps;
-use gps::{gpsdata, GPS};
+use gps::GPS;
 
 mod display;
-use display::{Display, DisplayError};
+use display::Display;
 use ssd1306::prelude::*;
 
 fn main() -> Result<(), Error> {
@@ -42,19 +42,19 @@ fn main() -> Result<(), Error> {
     let i2c =
         I2cDriver::new(peripherals.i2c0, sda, scl, &config).map_err(|err| Error::EspError(err))?;
 
+    // Prepare components for processing 
     let mut gps: GPS = GPS::new(peripherals.uart0, gps_rx)?;
     let mut display: Display<DisplaySize128x64> =
         Display::new(i2c, DisplaySize128x64, DisplayRotation::Rotate0)?;
-    let mut app_state = appstate::AppState::default();
+    let mut _app_state = appstate::AppState::default();
 
     loop {
-        let text: &str;
-
         // Get the latest data from GPS module and flush to Display
         match gps.poll() {
             Ok(res) => display.draw(&res.get_speed().as_str())?,
             Err(e) => {
-                display.draw("NO\nGPS\nDATA");
+                display.draw("NO\nGPS\nDATA")?;
+                eprintln!("{:?}", e);
             }
         }
     }