89 lines
2.6 KiB
Rust
89 lines
2.6 KiB
Rust
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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, SpidevBus, SpidevDevice};
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use linux_embedded_hal::gpio_cdev::{Chip, LineRequestFlags};
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use anyhow::Result;
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pub fn demo() -> Result<()> {
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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 mut panel = Epd7in3f::new(&mut spi, busy_pin, dc_pin, rst_pin, &mut delay, None)?;
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panel.show_7block(&mut spi, &mut delay)?;
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Ok(())
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}
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pub struct DisplayWrapper {
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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 DisplayWrapper {
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pub fn new() -> Result<DisplayWrapper> {
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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(DisplayWrapper {
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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 display(&mut self, buf: &[u8]) -> Result<()>{
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self.panel.update_and_display_frame(&mut self.spi, buf, &mut self.delay)?;
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Ok(())
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}
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}
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