add doc warnings

mipidsi/src/lib.rs

@@ -222,6 +222,10 @@ where
     /// * `ex` - x coordinate end
     /// * `ey` - y coordinate end
     /// * `colors` - anything that can provide `IntoIterator<Item = u16>` to iterate over pixel data
+    /// <div class="warning">
+    /// The `ex`and `ey` coordinates are inclusive. For example when using a rectangle
+    /// of size `320x240`, one would use `319` an `239` as `ex` and `ey` values.
+    /// </div>
     pub fn set_pixels<T>(
         &mut self,
         sx: u16,
@@ -255,7 +259,19 @@ where
     /// * `sy` - y coordinate start
     /// * `ex` - x coordinate end
     /// * `ey` - y coordinate end
-    /// * `raw_buf` - &[u8] buffer of raw pixel data in the format expected by the display.
+    /// * `raw_buf` - `&[u8]` buffer of raw pixel data in the format expected by the display.
+    /// <div class="warning">
+    /// This method requires the <b>raw_buf</b> data to be in the correct endianness
+    /// and format expected by the display.
+    ///
+    /// The method won't <b>work with a 16bit display-interface-gpio</b>, because it
+    /// pads the each byte to a u16 instead of converting each two byte chunk
+    /// into a u16. [See here for more info](https://github.com/therealprof/display-interface/blob/8fca041b0288740678f16c1d05cce21bd3867ee5/parallel-gpio/src/lib.rs#L267)
+    /// </div>
+    /// <div class="warning">
+    /// The <b>ex</b> and <b>ey</b> coordinates are inclusive. For example when using a rectangle
+    /// of size <b>320x240</b>, one would use <b>319</b> an <b>239</b> as <b>ex</b> and <b>ey</b> values.
+    /// </div>
     pub fn set_pixels_raw_u8(
         &mut self,
         sx: u16,

mipidsi/src/models.rs

@@ -74,9 +74,17 @@ pub trait Model {
         DI: WriteOnlyDataCommand,
         I: IntoIterator<Item = Self::ColorFormat>;
 
-    /// Writes raw &[u8] buffer to the display IC via the given display interface.
+    /// Writes raw `&[u8]` buffer to the display IC via the given display interface.
     ///
     /// No pixel color format conversion, raw data is passed on directly.
+    /// <div class="warning">
+    /// This method requires the `raw_buf` data to be in the correct endianness
+    /// and format expected by the display.
+    ///
+    /// The method <b>won't work with a 16bit display-interface-gpio</b>, because it
+    /// pads the each byte to a u16 instead of converting each two byte chunk
+    /// into a u16. [See here for more info](https://github.com/therealprof/display-interface/blob/8fca041b0288740678f16c1d05cce21bd3867ee5/parallel-gpio/src/lib.rs#L267)
+    /// </div>
     fn write_pixels_raw_u8<DI>(&mut self, dcs: &mut Dcs<DI>, raw_buf: &[u8]) -> Result<(), Error>
     where
         DI: WriteOnlyDataCommand,