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Simplify SPI example

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This commit is contained in:
Dario Nieuwenhuis 2021-05-15 00:47:22 +02:00
parent 2569d38ab4
commit 28533cfc77
1 changed files with 7 additions and 29 deletions
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36
embassy-stm32-examples/src/bin/spi.rs
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@ -8,14 +8,14 @@
#[path = "../example_common.rs"] #[path = "../example_common.rs"]
mod example_common; mod example_common;
use embassy_stm32::gpio::{Level, Output, Input, Pull}; use embassy_stm32::gpio::{Input, Level, Output, Pull};
use embedded_hal::digital::v2::{OutputPin, InputPin}; use embedded_hal::digital::v2::{InputPin, OutputPin};
use example_common::*; use example_common::*;
use cortex_m_rt::entry; use cortex_m_rt::entry;
use stm32f4::stm32f429 as pac; use stm32f4::stm32f429 as pac;
//use stm32l4::stm32l4x5 as pac; //use stm32l4::stm32l4x5 as pac;
use embassy_stm32::spi::{Spi, MODE_0, ByteOrder, Config}; use embassy_stm32::spi::{ByteOrder, Config, Spi, MODE_0};
use embassy_stm32::time::Hertz; use embassy_stm32::time::Hertz;
use embedded_hal::blocking::spi::Transfer; use embedded_hal::blocking::spi::Transfer;
@ -48,10 +48,8 @@ fn main() -> ! {
}); });
let rc = pp.RCC.cfgr.read().sws().bits(); let rc = pp.RCC.cfgr.read().sws().bits();
info!("rcc -> {}", rc);
let p = embassy_stm32::init(Default::default()); let p = embassy_stm32::init(Default::default());
let mut led = Output::new(p.PA5, Level::High);
let mut spi = Spi::new( let mut spi = Spi::new(
Hertz(16_000_000), Hertz(16_000_000),
p.SPI3, p.SPI3,
@ -62,33 +60,13 @@ fn main() -> ! {
Config::default(), Config::default(),
); );
let mut cs = Output::new( p.PE0, Level::High); let mut cs = Output::new(p.PE0, Level::High);
cs.set_low();
let mut rdy = Input::new(p.PE1, Pull::Down);
let mut wake = Output::new( p.PB13, Level::Low);
let mut reset = Output::new( p.PE8, Level::Low);
wake.set_high().unwrap();
reset.set_high().unwrap();
loop { loop {
info!("loop"); let mut buf = [0x0A; 4];
while rdy.is_low().unwrap() { cs.set_low();
info!("await ready")
}
info!("ready");
let mut buf = [0x0A;4];
spi.transfer(&mut buf); spi.transfer(&mut buf);
cs.set_high();
info!("xfer {=[u8]:x}", buf); info!("xfer {=[u8]:x}", buf);
} }
loop {
info!("high");
led.set_high().unwrap();
cortex_m::asm::delay(10_000_000);
info!("low");
led.set_low().unwrap();
cortex_m::asm::delay(10_000_000);
}
} }