#![allow(clippy::empty_loop)]
#![no_std]
#![no_main]
use panic_halt as _;
use cortex_m_rt::entry;
use stm32f1xx_hal::{
pac,
prelude::*,
spi::{Mode, Phase, Polarity, Spi},
};
#[entry]
fn main() -> ! {
let dp = pac::Peripherals::take().unwrap();
let mut flash = dp.FLASH.constrain();
let rcc = dp.RCC.constrain();
let clocks = rcc.cfgr.freeze(&mut flash.acr);
let mut gpiob = dp.GPIOB.split();
let pins = (
gpiob.pb13.into_alternate_push_pull(&mut gpiob.crh),
gpiob.pb14.into_floating_input(&mut gpiob.crh),
gpiob.pb15.into_alternate_push_pull(&mut gpiob.crh),
);
let spi_mode = Mode {
polarity: Polarity::IdleLow,
phase: Phase::CaptureOnFirstTransition,
};
let spi = Spi::spi2(dp.SPI2, pins, spi_mode, 100.kHz(), clocks);
let dma = dp.DMA1.split();
let spi_dma = spi.with_tx_dma(dma.5);
let transfer = spi_dma.write(b"hello, world");
let (_buffer, _spi_dma) = transfer.wait();
loop {}
}