85 lines
2.4 KiB
Rust
85 lines
2.4 KiB
Rust
use epd_waveshare::{epd7in3f::Epd7in3f, prelude::WaveshareDisplay};
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use linux_embedded_hal::spidev::SpiModeFlags;
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use linux_embedded_hal::spidev::SpidevOptions;
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use linux_embedded_hal::{CdevPin, Delay, SpidevDevice};
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use tracing::instrument;
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use tracing::{debug, warn};
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use anyhow::Result;
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use linux_embedded_hal::gpio_cdev::{Chip, LineRequestFlags};
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pub trait EInkPanel {
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fn display(&mut self, buf: &[u8]) -> Result<()>;
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}
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pub struct Wrapper {
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spi: SpidevDevice,
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gpiochip: Chip,
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delay: Delay,
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panel: Epd7in3f<SpidevDevice, CdevPin, CdevPin, CdevPin, Delay>,
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}
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impl Wrapper {
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pub fn new() -> Result<Self> {
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let mut spi = SpidevDevice::open("/dev/spidev0.0")?;
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let spi_options = SpidevOptions::new()
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.bits_per_word(8)
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.max_speed_hz(10_000_000)
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.mode(SpiModeFlags::SPI_MODE_0)
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.build();
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spi.configure(&spi_options)?;
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let mut gpiochip = Chip::new("/dev/gpiochip0")?;
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let busy_pin = CdevPin::new(gpiochip.get_line(24)?.request(
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LineRequestFlags::INPUT,
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0,
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"frametool",
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)?)?;
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let dc_pin = CdevPin::new(gpiochip.get_line(25)?.request(
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LineRequestFlags::OUTPUT,
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0,
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"frametool",
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)?)?;
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let rst_pin = CdevPin::new(gpiochip.get_line(17)?.request(
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LineRequestFlags::OUTPUT,
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0,
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"frametool",
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)?)?;
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let mut delay = Delay {};
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let panel = Epd7in3f::new(&mut spi, busy_pin, dc_pin, rst_pin, &mut delay, None)?;
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Ok(Self {
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spi,
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gpiochip,
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delay,
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panel,
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})
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}
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pub fn test(&mut self) -> Result<()> {
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self.panel.show_7block(&mut self.spi, &mut self.delay)?;
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self.panel.sleep(&mut self.spi, &mut self.delay)?;
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Ok(())
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}
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}
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impl EInkPanel for Wrapper {
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#[instrument(skip_all)]
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fn display(&mut self, buf: &[u8]) -> Result<()> {
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self.panel
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.update_and_display_frame(&mut self.spi, buf, &mut self.delay)?;
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debug!("Finished updating frame");
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self.panel.sleep(&mut self.spi, &mut self.delay)?;
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debug!("Display entered sleep mode");
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Ok(())
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}
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}
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pub struct FakeEInk();
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impl EInkPanel for FakeEInk {
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fn display(&mut self, _buf: &[u8]) -> Result<()> {
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// Do nothing.
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warn!("Fake display was called");
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Ok(())
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}
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}
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