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Use Result alias

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This commit is contained in:
Grant Miller 2021-05-10 17:15:59 -05:00
parent 954d111959
commit be44c24eea
1 changed files with 11 additions and 20 deletions
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31
src/lib.rs
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@ -14,6 +14,8 @@ pub use embedded_hal::spi::MODE_0 as SPI_MODE;
pub use display_interface::DisplayError;
type Result<T = (), E = DisplayError> = core::result::Result<T, E>;
/// Trait that defines display size information
pub trait DisplaySize {
/// Width in pixels
@ -81,7 +83,7 @@ where
delay: &mut DELAY,
mode: Orientation,
_display_size: SIZE,
) -> Result<Self, DisplayError>
) -> Result<Self>
where
DELAY: DelayMs<u16>,
SIZE: DisplaySize,
@ -129,17 +131,17 @@ where
Ok(ili9341)
}
fn command(&mut self, cmd: Command, args: &[u8]) -> Result<(), DisplayError> {
fn command(&mut self, cmd: Command, args: &[u8]) -> Result {
self.interface.send_commands(U8Iter(&mut once(cmd as u8)))?;
self.interface.send_data(U8Iter(&mut args.iter().cloned()))
}
fn write_iter<I: IntoIterator<Item = u16>>(&mut self, data: I) -> Result<(), DisplayError> {
fn write_iter<I: IntoIterator<Item = u16>>(&mut self, data: I) -> Result {
self.command(Command::MemoryWrite, &[])?;
self.interface.send_data(U16BEIter(&mut data.into_iter()))
}
fn set_window(&mut self, x0: u16, y0: u16, x1: u16, y1: u16) -> Result<(), DisplayError> {
fn set_window(&mut self, x0: u16, y0: u16, x1: u16, y1: u16) -> Result {
self.command(
Command::ColumnAddressSet,
&[
@ -165,7 +167,7 @@ where
&mut self,
fixed_top_lines: u16,
fixed_bottom_lines: u16,
) -> Result<Scroller, DisplayError> {
) -> Result<Scroller> {
let height = match self.mode {
Orientation::Landscape | Orientation::LandscapeFlipped => self.width,
Orientation::Portrait | Orientation::PortraitFlipped => self.height,
@ -187,11 +189,7 @@ where
Ok(Scroller::new(fixed_top_lines, fixed_bottom_lines, height))
}
pub fn scroll_vertically(
&mut self,
scroller: &mut Scroller,
num_lines: u16,
) -> Result<(), DisplayError> {
pub fn scroll_vertically(&mut self, scroller: &mut Scroller, num_lines: u16) -> Result {
scroller.top_offset += num_lines;
if scroller.top_offset > (scroller.height - scroller.fixed_bottom_lines) {
scroller.top_offset = scroller.fixed_top_lines
@ -223,7 +221,7 @@ where
x1: u16,
y1: u16,
data: I,
) -> Result<(), DisplayError> {
) -> Result {
self.set_window(x0, y0, x1, y1)?;
self.write_iter(data)
}
@ -237,20 +235,13 @@ where
/// video memory.
///
/// The expected format is rgb565.
pub fn draw_raw(
&mut self,
x0: u16,
y0: u16,
x1: u16,
y1: u16,
data: &[u16],
) -> Result<(), DisplayError> {
pub fn draw_raw(&mut self, x0: u16, y0: u16, x1: u16, y1: u16, data: &[u16]) -> Result {
self.set_window(x0, y0, x1, y1)?;
self.write_iter(data.iter().cloned())
}
/// Change the orientation of the screen
pub fn set_orientation(&mut self, mode: Orientation) -> Result<(), DisplayError> {
pub fn set_orientation(&mut self, mode: Orientation) -> Result {
let was_landscape = match self.mode {
Orientation::Landscape | Orientation::LandscapeFlipped => true,
Orientation::Portrait | Orientation::PortraitFlipped => false,