#![no_std]
#![no_main]

extern crate panic_halt;

use riscv_rt::entry;

#[entry]
fn main() -> ! {
    let gpioa_ctl0 = 0x4001_0800_usize as *mut u32;
    let gpioa_bop = 0x4001_0810_usize as *mut u32;
    let gpioa_bc = 0x4001_0814_usize as *mut u32;
    let rcu_apb2en = 0x4002_1018_usize as *mut u32;
    unsafe {
        *rcu_apb2en = 0x00000004_u32;
        *gpioa_ctl0 = 0x34444334_u32;
        *gpioa_bop = 0b00000000_00000000_00000000_10000010_u32;
        *gpioa_bc  = 0b00000000_00000000_00000000_00000100_u32;
    }

    loop {
    }
}