hd44780-controller 0.1.0-alpha.2

HD44780 LCD controller with async/sync support for embedded-hal
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38

use crate::device::*;

use super::*;

#[derive(Clone, PartialEq, Eq, Debug)]
pub struct ReturnHome;

impl SyncCommand for ReturnHome {
    type Ret = ();

    type Err = super::Error;

    fn execute<D: SyncDevice + ?Sized>(&self, dev: &mut D) -> Result<Self::Ret, Self::Err> {
        dev.write_byte(RegisterSelectMode::Command, 0x02)
            .map_err(|_| super::Error::DeviceError)?;
        dev.delay_us(2000);
        Ok(())
    }
}

#[cfg(feature = "async")]
#[cfg_attr(docsrs, doc(cfg(feature = "async")))]
impl AsyncCommand for ReturnHome {
    type Ret = ();

    type Err = super::Error;

    async fn execute_async<D: AsyncDevice + ?Sized>(
        &self,
        dev: &mut D,
    ) -> Result<Self::Ret, Self::Err> {
        dev.write_byte_async(RegisterSelectMode::Command, 0x02)
            .await
            .map_err(|_| super::Error::DeviceError)?;
        dev.delay_us_async(2000).await;
        Ok(())
    }
}