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#![no_std]
#![allow(clippy::type_complexity)]
pub mod instruction;
use crate::instruction::Instruction;
use display_interface::WriteOnlyDataCommand;
use embedded_hal::blocking::delay::DelayUs;
use embedded_hal::digital::v2::OutputPin;
#[cfg(feature = "graphics")]
mod graphics;
#[cfg(feature = "batch")]
mod batch;
pub struct ST7789<DI, RST>
where
DI: WriteOnlyDataCommand,
RST: OutputPin,
{
di: DI,
rst: RST,
size_x: u16,
size_y: u16,
}
#[repr(u8)]
#[derive(Copy, Clone)]
pub enum Orientation {
Portrait = 0b0000_0000,
Landscape = 0b0110_0000,
PortraitSwapped = 0b1100_0000,
LandscapeSwapped = 0b1010_0000,
}
#[derive(Debug)]
pub enum Error<PinE> {
DisplayError,
Pin(PinE),
}
impl<DI, RST, PinE> ST7789<DI, RST>
where
DI: WriteOnlyDataCommand,
RST: OutputPin<Error = PinE>,
{
pub fn new(di: DI, rst: RST, size_x: u16, size_y: u16) -> Self {
Self {
di,
rst,
size_x,
size_y,
}
}
pub fn init(&mut self, delay_source: &mut impl DelayUs<u32>) -> Result<(), Error<PinE>> {
self.hard_reset(delay_source)?;
self.write_command(Instruction::SWRESET)?;
delay_source.delay_us(150_000);
self.write_command(Instruction::SLPOUT)?;
delay_source.delay_us(10_000);
self.write_command(Instruction::INVOFF)?;
self.write_command(Instruction::MADCTL)?;
self.write_data(&[0b0000_0000])?;
self.write_command(Instruction::COLMOD)?;
self.write_data(&[0b0101_0101])?;
self.write_command(Instruction::INVON)?;
delay_source.delay_us(10_000);
self.write_command(Instruction::NORON)?;
delay_source.delay_us(10_000);
self.write_command(Instruction::DISPON)?;
delay_source.delay_us(10_000);
Ok(())
}
pub fn hard_reset(&mut self, delay_source: &mut impl DelayUs<u32>) -> Result<(), Error<PinE>> {
self.rst.set_high().map_err(Error::Pin)?;
delay_source.delay_us(10);
self.rst.set_low().map_err(Error::Pin)?;
delay_source.delay_us(10);
self.rst.set_high().map_err(Error::Pin)?;
delay_source.delay_us(10);
Ok(())
}
pub fn set_orientation(&mut self, orientation: Orientation) -> Result<(), Error<PinE>> {
self.write_command(Instruction::MADCTL)?;
self.write_data(&[orientation as u8])?;
Ok(())
}
pub fn set_pixel(&mut self, x: u16, y: u16, color: u16) -> Result<(), Error<PinE>> {
self.set_address_window(x, y, x, y)?;
self.write_command(Instruction::RAMWR)?;
self.write_data16(&[color])
}
pub fn set_pixels<T>(
&mut self,
sx: u16,
sy: u16,
ex: u16,
ey: u16,
colors: T,
) -> Result<(), Error<PinE>>
where
T: IntoIterator<Item = u16>,
{
self.set_address_window(sx, sy, ex, ey)?;
self.write_command(Instruction::RAMWR)?;
self.write_pixels(colors)
}
pub fn release(self) -> (DI, RST) {
(self.di, self.rst)
}
#[cfg(not(feature = "buffer"))]
fn write_pixels<T>(&mut self, colors: T) -> Result<(), Error<PinE>>
where
T: IntoIterator<Item = u16>,
{
for color in colors {
self.write_data16(&[color])?;
}
Ok(())
}
#[cfg(feature = "buffer")]
fn write_pixels<T>(&mut self, colors: T) -> Result<(), Error<PinE>>
where
T: IntoIterator<Item = u16>,
{
let mut buf = [0; 64];
let mut i = 0;
for color in colors {
let word = color.to_be();
buf[i] = word;
i += 1;
if i == buf.len() {
self.write_data16(&buf)?;
i = 0;
}
}
if i > 0 {
self.write_data16(&buf[..i])?;
}
Ok(())
}
fn write_command(&mut self, command: Instruction) -> Result<(), Error<PinE>> {
use display_interface::DataFormat::U8;
self.di
.send_commands(U8(&[command as u8]))
.map_err(|_| Error::DisplayError)?;
Ok(())
}
fn write_data(&mut self, data: &[u8]) -> Result<(), Error<PinE>> {
use display_interface::DataFormat::U8;
self.di.send_data(U8(data)).map_err(|_| Error::DisplayError)
}
fn write_data16(&mut self, data: &[u16]) -> Result<(), Error<PinE>> {
use display_interface::DataFormat::U16;
self.di
.send_data(U16(data))
.map_err(|_| Error::DisplayError)
}
fn set_address_window(
&mut self,
sx: u16,
sy: u16,
ex: u16,
ey: u16,
) -> Result<(), Error<PinE>> {
self.write_command(Instruction::CASET)?;
self.write_data(&sx.to_be_bytes())?;
self.write_data(&ex.to_be_bytes())?;
self.write_command(Instruction::RASET)?;
self.write_data(&sy.to_be_bytes())?;
self.write_data(&ey.to_be_bytes())
}
}