Expand description
Blinks an LED
#![deny(unsafe_code)]
#![deny(warnings)]
#![no_std]
#![no_main]
extern crate cortex_m;
#[macro_use(entry, exception)]
extern crate cortex_m_rt as rt;
extern crate f3;
extern crate panic_semihosting;
use f3::hal::delay::Delay;
use f3::hal::prelude::*;
use f3::hal::stm32f30x;
use f3::led::Led;
use rt::ExceptionFrame;
entry!(main);
fn main() -> ! {
let cp = cortex_m::Peripherals::take().unwrap();
let dp = stm32f30x::Peripherals::take().unwrap();
let mut flash = dp.FLASH.constrain();
let mut rcc = dp.RCC.constrain();
let mut gpioe = dp.GPIOE.split(&mut rcc.ahb);
// clock configuration using the default settings (all clocks run at 8 MHz)
let clocks = rcc.cfgr.freeze(&mut flash.acr);
// TRY this alternate clock configuration (all clocks run at 16 MHz)
// let clocks = rcc.cfgr.sysclk(16.mhz()).freeze(&mut flash.acr);
let mut led: Led = gpioe
.pe9
.into_push_pull_output(&mut gpioe.moder, &mut gpioe.otyper)
.into();
let mut delay = Delay::new(cp.SYST, clocks);
loop {
led.on();
delay.delay_ms(1_000_u16);
led.off();
delay.delay_ms(1_000_u16);
}
}
exception!(HardFault, hard_fault);
fn hard_fault(ef: &ExceptionFrame) -> ! {
panic!("{:#?}", ef);
}
exception!(*, default_handler);
fn default_handler(irqn: i16) {
panic!("Unhandled exception (IRQn = {})", irqn);
}