#![deny(unsafe_code)]
#![allow(clippy::empty_loop)]
#![no_std]
#![no_main]
use cortex_m_rt::entry;
use panic_halt as _;
use embedded_hal::spi::{Mode, Phase, Polarity};
pub const MODE: Mode = Mode {
phase: Phase::CaptureOnSecondTransition,
polarity: Polarity::IdleHigh,
};
use stm32f1xx_hal::{
gpio::gpioa::PA4,
gpio::{Output, PushPull},
pac::{Peripherals, SPI1},
prelude::*,
spi::{Pins, Spi, Spi1NoRemap},
};
fn setup() -> (
Spi<SPI1, Spi1NoRemap, impl Pins<Spi1NoRemap>, u8>,
PA4<Output<PushPull>>,
) {
let dp = Peripherals::take().unwrap();
let mut flash = dp.FLASH.constrain();
let rcc = dp.RCC.constrain();
let clocks = rcc.cfgr.freeze(&mut flash.acr);
let mut afio = dp.AFIO.constrain();
let mut gpioa = dp.GPIOA.split();
let sck = gpioa.pa5.into_alternate_push_pull(&mut gpioa.crl);
let miso = gpioa.pa6;
let mosi = gpioa.pa7.into_alternate_push_pull(&mut gpioa.crl);
let cs = gpioa.pa4.into_push_pull_output(&mut gpioa.crl);
let spi = Spi::spi1(
dp.SPI1,
(sck, miso, mosi),
&mut afio.mapr,
MODE,
1.MHz(),
clocks,
);
(spi, cs)
}
#[entry]
fn main() -> ! {
let (_spi, _cs) = setup();
loop {}
}