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//! Container to store and set display properties
use crate::command::{AddrMode, Command, VcomhLevel};
use crate::displayrotation::DisplayRotation;
use crate::displaysize::DisplaySize;
use crate::interface::DisplayInterface;
/// Display properties struct
pub struct DisplayProperties<DI> {
iface: DI,
display_size: DisplaySize,
display_rotation: DisplayRotation,
}
impl<DI> DisplayProperties<DI>
where
DI: DisplayInterface,
{
/// Create new DisplayProperties instance
pub fn new(
iface: DI,
display_size: DisplaySize,
display_rotation: DisplayRotation,
) -> DisplayProperties<DI> {
DisplayProperties {
iface,
display_size,
display_rotation,
}
}
/// Initialise the display in column mode (i.e. a byte walks down a column of 8 pixels) with
/// column 0 on the left and column _(display_width - 1)_ on the right.
pub fn init_column_mode(&mut self) -> Result<(), ()> {
// TODO: Break up into nice bits so display modes can pick whathever they need
let (_, display_height) = self.display_size.dimensions();
let display_rotation = self.display_rotation;
Command::DisplayOn(false).send(&mut self.iface)?;
Command::DisplayClockDiv(0x8, 0x0).send(&mut self.iface)?;
Command::Multiplex(display_height - 1).send(&mut self.iface)?;
Command::DisplayOffset(0).send(&mut self.iface)?;
Command::StartLine(0).send(&mut self.iface)?;
// TODO: Ability to turn charge pump on/off
Command::ChargePump(true).send(&mut self.iface)?;
Command::AddressMode(AddrMode::Horizontal).send(&mut self.iface)?;
self.set_rotation(display_rotation)?;
match self.display_size {
DisplaySize::Display128x32 => Command::ComPinConfig(false, false).send(&mut self.iface),
DisplaySize::Display128x64 => Command::ComPinConfig(true, false).send(&mut self.iface),
DisplaySize::Display96x16 => Command::ComPinConfig(false, false).send(&mut self.iface),
}?;
Command::Contrast(0x8F).send(&mut self.iface)?;
Command::PreChargePeriod(0x1, 0xF).send(&mut self.iface)?;
Command::VcomhDeselect(VcomhLevel::Auto).send(&mut self.iface)?;
Command::AllOn(false).send(&mut self.iface)?;
Command::Invert(false).send(&mut self.iface)?;
Command::EnableScroll(false).send(&mut self.iface)?;
Command::DisplayOn(true).send(&mut self.iface)?;
Ok(())
}
/// Set the position in the framebuffer of the display where any sent data should be
/// drawn. This method can be used for changing the affected area on the screen as well
/// as (re-)setting the start point of the next `draw` call.
pub fn set_draw_area(&mut self, start: (u8, u8), end: (u8, u8)) -> Result<(), ()> {
Command::ColumnAddress(start.0, end.0 - 1).send(&mut self.iface)?;
Command::PageAddress(start.1.into(), (end.1 - 1).into()).send(&mut self.iface)?;
Ok(())
}
/// Send the data to the display for drawing at the current position in the framebuffer
/// and advance the position accordingly. Cf. `set_draw_area` to modify the affected area by
/// this method.
pub fn draw(&mut self, buffer: &[u8]) -> Result<(), ()> {
self.iface.send_data(&buffer)?;
Ok(())
}
/// Get the configured display size
pub fn get_size(&self) -> DisplaySize {
self.display_size
}
// TODO: Replace (u8, u8) with a dimensioney type for consistency
// TOOD: Make doc tests work
/// Get display dimensions, taking into account the current rotation of the display
///
/// ```rust
/// # struct FakeInterface;
/// #
/// # impl DisplayInterface for FakeInterface {
/// # fn send_command(&mut self, cmd: u8) -> Result<(), ()> { Ok(()) }
/// # fn send_data(&mut self, buf: &[u8]) -> Result<(), ()> { Ok(()) }
/// # }
/// #
/// # let interface = FakeInterface {};
/// #
/// let disp = DisplayProperties::new(
/// interface,
/// DisplaySize::Display128x64,
/// DisplayRotation::Rotate0
/// );
/// assert_eq!(disp.get_dimensions(), (128, 64));
///
/// # let interface = FakeInterface {};
/// let rotated_disp = DisplayProperties::new(
/// interface,
/// DisplaySize::Display128x64,
/// DisplayRotation::Rotate90
/// );
/// assert_eq!(rotated_disp.get_dimensions(), (64, 128));
/// ```
pub fn get_dimensions(&self) -> (u8, u8) {
let (w, h) = self.display_size.dimensions();
match self.display_rotation {
DisplayRotation::Rotate0 | DisplayRotation::Rotate180 => (w, h),
DisplayRotation::Rotate90 | DisplayRotation::Rotate270 => (h, w),
}
}
/// Get the display rotation
pub fn get_rotation(&self) -> DisplayRotation {
self.display_rotation
}
/// Set the display rotation
pub fn set_rotation(&mut self, display_rotation: DisplayRotation) -> Result<(), ()> {
self.display_rotation = display_rotation;
match display_rotation {
DisplayRotation::Rotate0 => {
Command::SegmentRemap(true).send(&mut self.iface)?;
Command::ReverseComDir(true).send(&mut self.iface)?;
}
DisplayRotation::Rotate90 => {
Command::SegmentRemap(false).send(&mut self.iface)?;
Command::ReverseComDir(true).send(&mut self.iface)?;
}
DisplayRotation::Rotate180 => {
Command::SegmentRemap(false).send(&mut self.iface)?;
Command::ReverseComDir(false).send(&mut self.iface)?;
}
DisplayRotation::Rotate270 => {
Command::SegmentRemap(true).send(&mut self.iface)?;
Command::ReverseComDir(false).send(&mut self.iface)?;
}
};
Ok(())
}
}