Add TearingMode

src/display.rs

@@ -119,6 +119,8 @@ pub enum Command {
     PTLAR = 0x30,
     VSCRDEF = 0x33,
     ColorMode = 0x3A,
+    TearingOff = 0x34,
+    TearingOn = 0x35,
     MADCTL = 0x36,
     VSCSAD = 0x37,
     // MadCTLMY = 0x80,
@@ -188,6 +190,12 @@ pub struct SetAddressMode {
     pub refresh_order: RefreshOrder,
 }
 
+pub enum TearingMode {
+    Off,
+    Horizontal,
+    HorizontalAndVertical,
+}
+
 impl SetAddressMode {
     pub fn into_madctl(&self) -> u8 {
         let mut result = 0;
@@ -296,6 +304,21 @@ impl<'d, DM: DriverMode, T: DelayNs> Display<'d, DM, T> {
         self.write(Writeable::Data(&[mode & 0x77]));
     }
 
+    pub fn set_tearing(&mut self, tearing: TearingMode) {
+        let cmd = match tearing {
+            TearingMode::Off => Command::TearingOff,
+            TearingMode::Horizontal => Command::TearingOn,
+            TearingMode::HorizontalAndVertical => Command::TearingOn,
+        };
+        self.write(Writeable::Command(cmd));
+
+        match tearing {
+            TearingMode::Off => {}
+            TearingMode::Horizontal => self.write(Writeable::Data(&[0])),
+            TearingMode::HorizontalAndVertical => self.write(Writeable::Data(&[1])),
+        }
+    }
+
     fn set_columns(&mut self, start: u16, end: u16) {
         let [start1, start2] = start.to_be_bytes();
         let [end1, end2] = end.to_be_bytes();

src/main.rs

@@ -94,6 +94,8 @@ fn main() -> ! {
         color_order: display::ColorOrder::Bgr,
         ..Default::default()
     });
+    display.set_tearing(display::TearingMode::Horizontal);
+
     display.draw_rect(
         Position::new(0, 0),
         Position::new(32, 32),