Struct CharLcd 

pub struct CharLcd { /* private fields */ }

Available on target_os=none only.

A device abstraction for an HD44780-compatible character LCD.

use device_envoy::char_lcd::{CharLcd, CharLcdStatic};

async fn example(
    p: embassy_rp::Peripherals,
    spawner: embassy_executor::Spawner,
) -> device_envoy::Result<()> {
    static CHAR_LCD_STATIC: CharLcdStatic = CharLcd::new_static();
    let lcd = CharLcd::new(&CHAR_LCD_STATIC, p.I2C0, p.PIN_1, p.PIN_0, spawner)?;
    let mut text: heapless::String<64> = "Hello!".try_into().unwrap();
    lcd.write_text(text, 1_000).await;
    Ok(())
}

Implementations

impl CharLcd

pub const fn new_static() -> CharLcdStatic

Create CharLcd resources

pub fn new<SCL, SDA>( char_lcd_static: &'static CharLcdStatic, i2c_peripheral: Peri<'static, I2C0>, scl: Peri<'static, SCL>, sda: Peri<'static, SDA>, spawner: Spawner, ) -> Result<Self>

where SCL: SclPin<I2C0>, SDA: SdaPin<I2C0>,

Create a new CharLcd device

Note: Hardcoded to I2C0 peripheral (like WiFi’s internal pins). However, SCL and SDA can be any pins compatible with I2C0.

pub async fn write_text(&self, text: String<64>, duration_ms: u32)

Send a message to the LCD (async, waits until queued)