add Display::is_sleeping fixes #77

mipidsi/CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - added `GC9A01` model support
 - added `Display::wake` method
 - added `Display::sleep` method
+- added `Display::is_sleeping` method
 
 ## [v0.7.1] - 2023-05-24
 

mipidsi/src/builder.rs

@@ -140,6 +140,7 @@ where
             rst,
             options: self.options,
             madctl,
+            sleeping: false, // TODO: init should lock state
         };
 
         Ok(display)

mipidsi/src/lib.rs

@@ -119,6 +119,8 @@ where
     options: ModelOptions,
     // Current MADCTL value copy for runtime updates
     madctl: dcs::SetAddressMode,
+    // State monitor for sleeping TODO: refactor to a Model-connected state machine
+    sleeping: bool,
 }
 
 impl<DI, M, RST> Display<DI, M, RST>
@@ -255,6 +257,13 @@ where
             .write_command(dcs::SetTearingEffect(tearing_effect))
     }
 
+    ///
+    /// Returns `true` if display is currently set to sleep.
+    ///
+    pub fn is_sleeping<D: DelayUs<u32>>(&self) -> bool {
+        self.sleeping
+    }
+
     ///
     /// Puts the display to sleep, reducing power consumption.
     /// Need to call [Self::wake] before issuing other commands
@@ -263,6 +272,7 @@ where
         self.dcs.write_command(dcs::EnterSleepMode)?;
         // All supported models requires a 120ms delay before issuing other commands
         delay.delay_us(120_000);
+        self.sleeping = true;
         Ok(())
     }
 
@@ -273,6 +283,7 @@ where
         self.dcs.write_command(dcs::ExitSleepMode)?;
         // ST7789 and st7735s have the highest minimal delay of 120ms
         delay.delay_us(120_000);
+        self.sleeping = false;
         Ok(())
     }
 }