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#![no_std]
#![no_main]
extern crate panic_halt;
use cortex_m_rt::entry;
use hal::gpio::GpioExt;
use hal::flash::FlashExt;
use hal::rcc::RccExt;
use hd44780_driver::{Cursor, CursorBlink, Display, DisplayMode, HD44780};
// Connections:
// VSS: GND
// VDD: 5V
// V0: 10k poti between 5V and GND
// RS: PD1
// RW: GND
// E: PD2
// D4-D7: PD4-PD7
// A: 5V
// K: GND
#[entry]
fn main() -> ! {
let cp = cortex_m::Peripherals::take().unwrap();
let dp = hal::stm32f30x::Peripherals::take().unwrap();
let mut flash = dp.FLASH.constrain();
let mut rcc = dp.RCC.constrain();
let mut gpiod = dp.GPIOD.split(&mut rcc.ahb);
let clocks = rcc.cfgr.freeze(&mut flash.acr);
let delay = hal::delay::Delay::new(cp.SYST, clocks);
let rs = gpiod.pd1.into_push_pull_output(&mut gpiod.moder, &mut gpiod.otyper);
let en = gpiod.pd2.into_push_pull_output(&mut gpiod.moder, &mut gpiod.otyper);
let b4 = gpiod.pd4.into_push_pull_output(&mut gpiod.moder, &mut gpiod.otyper);
let b5 = gpiod.pd5.into_push_pull_output(&mut gpiod.moder, &mut gpiod.otyper);
let b6 = gpiod.pd6.into_push_pull_output(&mut gpiod.moder, &mut gpiod.otyper);
let b7 = gpiod.pd7.into_push_pull_output(&mut gpiod.moder, &mut gpiod.otyper);
let mut lcd = HD44780::new_4bit(rs, en, b4, b5, b6, b7, delay);
lcd.reset();
lcd.clear();
lcd.set_display_mode(
DisplayMode {
display: Display::On,
cursor_visibility: Cursor::Visible,
cursor_blink: CursorBlink::On,
}
);
lcd.write_str("Hello, world!");
loop {}
}
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