Add State-system

src/display.rs

@@ -3,7 +3,7 @@ use core::ops::{Add, Mul};
 use embedded_hal::{delay::DelayNs, spi::SpiBus};
 use esp_hal::{DriverMode, gpio::Output, spi::master::Spi};
 
-#[derive(Clone, Copy)]
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
 pub struct Rgb565(pub u8, pub u8, pub u8);
 
 impl Rgb565 {
@@ -72,7 +72,7 @@ impl Add<Rgb565> for Rgb565 {
     }
 }
 
-#[derive(Default, Clone, Copy, Debug)]
+#[derive(Default, Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
 pub struct Position {
     pub x: i16,
     pub y: i16,
@@ -84,7 +84,7 @@ impl Position {
     }
 }
 
-#[derive(Default, Clone, Copy)]
+#[derive(Default, Clone, Copy, PartialEq, Eq)]
 pub struct Color {
     pub bytes: [u8; 2],
 }
@@ -371,4 +371,8 @@ impl<'d, DM: DriverMode, T: DelayNs> Display<'d, DM, T> {
             self.write(Writeable::Data(&color.bytes));
         }
     }
+
+    pub fn clear(&mut self, color: Color) {
+        self.draw_rect(Position::new(0, 0), Position::new(240, 240), color);
+    }
 }

src/font.rs

@@ -10,12 +10,14 @@ use crate::display::{self, Color, Display, Position, Rgb565};
 
 static OPEN_SANS: &'static [u8] = include_bytes!("./OpenSans_Condensed-Regular.ttf");
 
+#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
 pub enum HorizontalAlignment {
     RightToLeft,
     Center,
     LeftToRight,
 }
 
+#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
 pub enum VerticalAlignment {
     TopToBottom,
     Center,

src/main.rs

@@ -9,7 +9,7 @@
 
 use core::fmt::Write;
 
-use alloc::{borrow::ToOwned, str};
+use alloc::{borrow::ToOwned, boxed::Box, str};
 use embedded_hal::delay::DelayNs;
 use esp_alloc::export::enumset::EnumSet;
 use esp_hal::{
@@ -28,6 +28,7 @@ use crate::{
     at_commands::ATCommands,
     display::{Display, Position, Rgb565, SetAddressMode},
     font::{FontRenderer, HorizontalAlignment, VerticalAlignment},
+    state::{HelloState, StateManager},
 };
 
 extern crate alloc;
@@ -35,6 +36,7 @@ extern crate alloc;
 mod at_commands;
 mod display;
 mod font;
+mod state;
 
 // This creates a default app-descriptor required by the esp-idf bootloader.
 // For more information see: <https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/system/app_image_format.html#application-description>
@@ -156,13 +158,18 @@ fn main() -> ! {
         );
     };
 
-    at_commands.init();
-    render_response(at_commands.raw_command("ATI".to_owned()));
-    render_response(at_commands.raw_command("AT+CMGF?".to_owned()));
-    render_response(at_commands.raw_command("AT+CPIN=1234".to_owned()));
-    render_response(at_commands.raw_command("AT+CPIN?".to_owned()));
-    render_response(at_commands.raw_command("AT+CMGF=1".to_owned()));
-    render_response(at_commands.raw_command("AT+CSCS=?".to_owned()));
+    // at_commands.init();
+    // render_response(at_commands.raw_command("ATI".to_owned()));
+    // render_response(at_commands.raw_command("AT+CMGF?".to_owned()));
+    // render_response(at_commands.raw_command("AT+CPIN=1234".to_owned()));
+    // render_response(at_commands.raw_command("AT+CPIN?".to_owned()));
+    // render_response(at_commands.raw_command("AT+CMGF=1".to_owned()));
+    // render_response(at_commands.raw_command("AT+CSCS=?".to_owned()));
+
+    let mut state_mgr = StateManager {
+        data: state::StateData::from(display, at_commands),
+        curr_state: Box::new(HelloState),
+    };
     // render_response(
     //     at_commands.raw_two_part_command("AT+CMGS=\"number\"".to_owned(), "hello".to_owned()),
     // );
@@ -187,15 +194,8 @@ fn main() -> ! {
 
     let mut test_delay = Delay::new();
     loop {
-        // log::info!("Input 1: {}", input_1.is_high());
-        // log::info!("Input 2: {}", input_2.is_high());
-        // log::info!("Input 3: {}", input_3.is_high());
-        // log::info!("Input 4: {}", input_4.is_high());
-        // log::info!("Input 5: {}", input_5.is_high());
-        // log::info!("Input 6: {}", input_6.is_high());
-        // log::info!("Input 7: {}", input_7.is_high());
-        // input_7.toggle();
-        test_delay.delay_millis(100);
+        state_mgr.update();
+        state_mgr.draw();
     }
 
     // for inspiration have a look at the examples at https://github.com/esp-rs/esp-hal/tree/esp-hal-v1.1.0/examples

src/state.rs

@@ -0,0 +1,126 @@
+use alloc::{boxed::Box, string::String, vec::Vec};
+use esp_hal::{Blocking, delay::Delay};
+
+use crate::{
+    at_commands::ATCommands,
+    display::{Color, Display, Position, Rgb565},
+    font::{FontRenderer, HorizontalAlignment, VerticalAlignment},
+};
+
+#[derive(PartialEq, Eq, Clone)]
+pub struct TextSettings {
+    h_align: HorizontalAlignment,
+    v_align: VerticalAlignment,
+    fg: Rgb565,
+    bg: Rgb565,
+}
+
+impl Default for TextSettings {
+    fn default() -> Self {
+        Self {
+            h_align: HorizontalAlignment::LeftToRight,
+            v_align: VerticalAlignment::TopToBottom,
+            fg: Rgb565::white(),
+            bg: Rgb565::black(),
+        }
+    }
+}
+
+#[derive(PartialEq, Eq, Clone)]
+pub enum DrawCommands {
+    Clear(Color),
+    DrawText(String, Position, TextSettings),
+}
+
+pub struct StateData<'a> {
+    display: Display<'a, Blocking, Delay>,
+    at_commands: ATCommands<'a, 'a>,
+    font_renderer: FontRenderer<'a>,
+    pub delay: Delay,
+
+    prev_commands: Vec<DrawCommands>,
+    commands: Vec<DrawCommands>,
+}
+
+impl<'a> StateData<'a> {
+    pub fn from(
+        display: Display<'a, Blocking, Delay>,
+        at_commands: ATCommands<'a, 'a>,
+    ) -> StateData<'a> {
+        StateData {
+            display,
+            at_commands,
+            font_renderer: FontRenderer::create(30),
+            delay: Delay::new(),
+
+            prev_commands: Vec::new(),
+            commands: Vec::new(),
+        }
+    }
+
+    pub fn clear_screen(&mut self, color: Color) {
+        self.commands.push(DrawCommands::Clear(color));
+    }
+
+    pub fn draw_text<T: Into<String>>(&mut self, text: T, pos: Position, settings: TextSettings) {
+        self.commands
+            .push(DrawCommands::DrawText(text.into(), pos, settings));
+    }
+}
+
+pub trait State {
+    fn update(&self, data: &mut StateData) -> Option<Box<dyn State>>;
+    fn draw(&self, data: &mut StateData);
+}
+
+pub struct StateManager<'a> {
+    pub data: StateData<'a>,
+    pub curr_state: Box<dyn State>,
+}
+
+impl<'a> StateManager<'a> {
+    pub fn update(&mut self) {
+        match self.curr_state.update(&mut self.data) {
+            Some(next_state) => self.curr_state = next_state,
+            None => {}
+        }
+    }
+
+    pub fn draw(&mut self) {
+        self.data.commands.clear();
+        self.curr_state.draw(&mut self.data);
+        if self.data.commands != self.data.prev_commands {
+            self.data.prev_commands = self.data.commands.clone();
+            for command in &self.data.commands {
+                match command {
+                    DrawCommands::Clear(color) => self.data.display.clear(*color),
+                    DrawCommands::DrawText(text, position, text_settings) => {
+                        self.data.font_renderer.render(
+                            &mut self.data.display,
+                            text,
+                            *position,
+                            text_settings.h_align,
+                            text_settings.v_align,
+                            text_settings.bg,
+                            text_settings.fg,
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+pub struct HelloState;
+
+impl State for HelloState {
+    fn update(&self, data: &mut StateData) -> Option<Box<dyn State>> {
+        data.delay.delay_millis(100);
+        None
+    }
+
+    fn draw(&self, data: &mut StateData) {
+        data.clear_screen(Rgb565::black().as_color());
+        data.draw_text("Hello World", Position::new(0, 0), TextSettings::default());
+    }
+}