Asyncify flush

Cargo.toml

@@ -13,27 +13,29 @@ version = "0.3.0"
 edition = "2018"
 
 [package.metadata.docs.rs]
-targets = [ "thumbv7m-none-eabi" ]
+targets = ["thumbv7m-none-eabi"]
 all-features = true
 
 [badges]
 circle-ci = { repository = "jamwaffles/ssd1331", branch = "master" }
 
 [dependencies]
-embedded-hal = "0.2.3"
+embedded-hal = "0.2.6"
 embedded-graphics-core = { version = "0.3.2", optional = true }
+embassy-traits = { version = "0.1.0", git = "https://github.com/embassy-rs/embassy", optional = true }
 
 [dev-dependencies]
 cortex-m = "0.7.3"
 cortex-m-rt = "0.6.11"
 panic-semihosting = "0.5.3"
 embedded-graphics = "0.7.1"
 tinybmp = "0.3.1"
-stm32f1xx-hal = { version = "0.7.0", features = [ "rt", "stm32f103" ] }
+stm32f1xx-hal = { version = "0.7.0", features = ["rt", "stm32f103"] }
 
 [features]
 default = ["graphics"]
 graphics = ["embedded-graphics-core"]
+async = ["embassy-traits"]
 
 [profile.dev]
 codegen-units = 1

examples/bmp.rs

@@ -21,6 +21,9 @@
 
 #![no_std]
 #![no_main]
+#![feature(type_alias_impl_trait)]
+#![feature(unchecked_math)]
+#![allow(incomplete_features)]
 
 use cortex_m_rt::{entry, exception, ExceptionFrame};
 use embedded_graphics::{geometry::Point, image::Image, pixelcolor::Rgb565, prelude::*};

src/display.rs

@@ -188,6 +188,25 @@ where
         Ok(())
     }
 
+    /// Send the full framebuffer to the display
+    ///
+    /// This resets the draw area the full size of the display
+    #[cfg(feature = "async")]
+    pub async fn flush_async(&mut self) -> Result<(), Error<CommE, PinE>> {
+        use embassy_traits::spi::Write as SpiTrait;
+
+        // Ensure the display buffer is at the origin of the display before we send the full frame
+        // to prevent accidental offsets
+        self.set_draw_area((0, 0), (DISPLAY_WIDTH - 1, DISPLAY_HEIGHT - 1))?;
+
+        // 1 = data, 0 = command
+        self.dc.set_high().map_err(Error::Pin)?;
+
+        self.spi.write(&self.buffer).map_err(Error::Comm)?;
+
+        Ok(())
+    }
+
     /// Set the top left and bottom right corners of a bounding box to draw to
     pub fn set_draw_area(
         &mut self,