Rust Error

code.rs

#![deny(unsafe_code)]
#![no_main]
#![no_std]

use panic_halt as _;
use nb::block;

use cortex_m_rt::entry;
use stm32f1xx_hal::{
    delay,
    pac,
    prelude::*,
    serial::{Config, Serial},
};

use hd44780_driver::{Cursor, CursorBlink, Display, DisplayMode, HD44780};

use core::fmt::Write;

#[entry]
fn main() -> ! {
    let cp = cortex_m::Peripherals::take().unwrap();
    // Get access to the device specific peripherals from the peripheral access crate
    let p = pac::Peripherals::take().unwrap();

    // Take ownership over the raw flash and rcc devices and convert them into the corresponding
    // HAL structs
    let mut flash = p.FLASH.constrain();
    let mut rcc = p.RCC.constrain();

    // Freeze the configuration of all the clocks in the system and store the frozen frequencies in
    // `clocks`
    let clocks = rcc.cfgr.freeze(&mut flash.acr);

    // Prepare the alternate function I/O registers
    let mut afio = p.AFIO.constrain(&mut rcc.apb2);

    // Prepare the GPIOB peripheral
    let mut gpiob = p.GPIOB.split(&mut rcc.apb2);

    // setup lcd screen
    let mut gpioa = p.GPIOA.split(&mut rcc.apb2);

    let mut delay = delay::Delay::new(cp.SYST, clocks);


    let rs = gpioa.pa7.into_push_pull_output(&mut gpioa.crl);
    let en = gpioa.pa6.into_push_pull_output(&mut gpioa.crl);
    let d4 = gpioa.pa5.into_push_pull_output(&mut gpioa.crl);
    let d5 = gpioa.pa4.into_push_pull_output(&mut gpioa.crl);
    let d6 = gpioa.pa3.into_push_pull_output(&mut gpioa.crl);
    let d7 = gpioa.pa2.into_push_pull_output(&mut gpioa.crl);


    let mut lcd = HD44780::new_4bit(rs, en, d4, d5, d6, d7, &mut delay);

    //Setup LCD
    lcd.reset(&mut delay);
    lcd.clear();
    lcd.set_display_mode(
        DisplayMode {
            display: Display::On,
            cursor_visibility: Cursor::Visible,
            cursor_blink: CursorBlink::On,
        }
    );
    lcd.write_str("Boot successful");



    // USART3
    // Configure pb10 as a push_pull output, this will be the tx pin
    let tx = gpiob.pb10.into_alternate_push_pull(&mut gpiob.crh);
    // Take ownership over pb11
    let rx = gpiob.pb11;

    // Set up the usart device. Taks ownership over the USART register and tx/rx pins. The rest of
    // the registers are used to enable and configure the device.
    let serial = Serial::usart3(
        p.USART3,
        (tx, rx),
        &mut afio.mapr,
        Config::default().baudrate(9600.bps()),
        clocks,
        &mut rcc.apb1,
    );

    // Split the serial struct into a receiving and a transmitting part
    let (mut tx, _rx) = serial.split();

    writeln!(tx, "AT").unwrap();

    delay.delay_ms(500_u16 );

    writeln!(tx, "AT+CREG=1").unwrap();

    delay.delay_ms(500_u16 );

    //config to sms
    writeln!(tx, "AT+CMGF=1").unwrap();

    delay.delay_ms(500_u16);

    // set recipient
    writeln!(tx, "AT+CMGS=\"+254111338104\"").unwrap();

    delay.delay_ms(500_u16);

    //send message
    writeln!(tx, "This is from the device on your desk").unwrap();

    delay.delay_ms(500_u16);

    block!(tx.write(26)).ok();

    delay.delay_ms(500_u16);
    loop {}
}

error

➜  chungabox git:(master) ✗ cargo build
   Compiling chungabox v0.1.0 (/Users/zacck/Documents/LK/chungabox)
error[E0599]: no method named `reset` found for enum `core::result::Result<HD44780<FourBitBus<PA7<Output<PushPull>>, PA6<Output<PushPull>>, PA5<Output<PushPull>>, PA4<Output<PushPull>>, PA3<Output<PushPull>>, PA2<Output<PushPull>>>>, hd44780_driver::error::Error>` in the current scope
  --> src/main.rs:63:9
   |
63 |     lcd.reset(&mut delay);
   |         ^^^^^ method not found in `core::result::Result<HD44780<FourBitBus<PA7<Output<PushPull>>, PA6<Output<PushPull>>, PA5<Output<PushPull>>, PA4<Output<PushPull>>, PA3<Output<PushPull>>, PA2<Output<PushPull>>>>, hd44780_driver::error::Error>`

error[E0599]: no method named `clear` found for enum `core::result::Result<HD44780<FourBitBus<PA7<Output<PushPull>>, PA6<Output<PushPull>>, PA5<Output<PushPull>>, PA4<Output<PushPull>>, PA3<Output<PushPull>>, PA2<Output<PushPull>>>>, hd44780_driver::error::Error>` in the current scope
  --> src/main.rs:64:9
   |
64 |     lcd.clear();
   |         ^^^^^ method not found in `core::result::Result<HD44780<FourBitBus<PA7<Output<PushPull>>, PA6<Output<PushPull>>, PA5<Output<PushPull>>, PA4<Output<PushPull>>, PA3<Output<PushPull>>, PA2<Output<PushPull>>>>, hd44780_driver::error::Error>`

error[E0599]: no method named `set_display_mode` found for enum `core::result::Result<HD44780<FourBitBus<PA7<Output<PushPull>>, PA6<Output<PushPull>>, PA5<Output<PushPull>>, PA4<Output<PushPull>>, PA3<Output<PushPull>>, PA2<Output<PushPull>>>>, hd44780_driver::error::Error>` in the current scope
  --> src/main.rs:65:9
   |
65 |     lcd.set_display_mode(
   |         ^^^^^^^^^^^^^^^^ method not found in `core::result::Result<HD44780<FourBitBus<PA7<Output<PushPull>>, PA6<Output<PushPull>>, PA5<Output<PushPull>>, PA4<Output<PushPull>>, PA3<Output<PushPull>>, PA2<Output<PushPull>>>>, hd44780_driver::error::Error>`

error[E0599]: no method named `write_str` found for enum `core::result::Result<HD44780<FourBitBus<PA7<Output<PushPull>>, PA6<Output<PushPull>>, PA5<Output<PushPull>>, PA4<Output<PushPull>>, PA3<Output<PushPull>>, PA2<Output<PushPull>>>>, hd44780_driver::error::Error>` in the current scope
  --> src/main.rs:72:9
   |
72 |     lcd.write_str("Boot successful");
   |         ^^^^^^^^^ method not found in `core::result::Result<HD44780<FourBitBus<PA7<Output<PushPull>>, PA6<Output<PushPull>>, PA5<Output<PushPull>>, PA4<Output<PushPull>>, PA3<Output<PushPull>>, PA2<Output<PushPull>>>>, hd44780_driver::error::Error>`

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0599`.
error: could not compile `chungabox`