Merge pull request #33 from david-sawatzke/spi_example

Add a basic spi example which isn't dependent on external components
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Daniel Egger 2019-01-05 18:53:53 +01:00 committed by GitHub
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use panic_halt;
use stm32f0xx_hal as hal;
use crate::hal::prelude::*;
use crate::hal::serial::Serial;
use crate::hal::spi::Spi;
use crate::hal::spi::{Mode, Phase, Polarity};
use crate::hal::stm32;
use nb::block;
use cortex_m_rt::entry;
/// A basic serial to spi example
/// If you connect MOSI & MISO pins together, you'll see all characters
/// that you typed in your serial terminal echoed back
/// If you connect MISO to GND, you'll see nothing coming back
fn main() -> ! {
const MODE: Mode = Mode {
polarity: Polarity::IdleHigh,
phase: Phase::CaptureOnSecondTransition,
if let Some(p) = stm32::Peripherals::take() {
let rcc = p.RCC.constrain();
let clocks = rcc.cfgr.freeze();
let gpioa = p.GPIOA.split();
// Configure pins for SPI
let sck = gpioa.pa5.into_alternate_af0();
let miso = gpioa.pa6.into_alternate_af0();
let mosi = gpioa.pa7.into_alternate_af0();
// Configure SPI with 1MHz rate
let mut spi = Spi::spi1(p.SPI1, (sck, miso, mosi), MODE, 1.mhz(), clocks);
let tx = gpioa.pa9.into_alternate_af1();
let rx = gpioa.pa10.into_alternate_af1();
let serial = Serial::usart1(p.USART1, (tx, rx), 115_200.bps(), clocks);
let (mut tx, mut rx) = serial.split();
loop {
let serial_received = block!(;
let spi_received = block!(;
loop {