Module max31865::examples::_00_stm32[−][src]

An example of reading the temperature.

Devices

Connections

MAX31865

 
#![no_std]
#![no_main]
 
extern crate cortex_m;
#[macro_use]
extern crate cortex_m_rt as rt;
extern crate panic_abort;
extern crate max31865;
extern crate embedded_hal as hal;
extern crate stm32f103xx_hal as dev_hal;
 
use dev_hal::spi::Spi;
use dev_hal::prelude::*;
use rt::ExceptionFrame;
use max31865::{Max31865, SensorType, FilterMode};
 
entry!(main);
 
fn main() -> ! {
    let dp = dev_hal::stm32f103xx::Peripherals::take().unwrap();
    let mut flash = dp.FLASH.constrain();
    let mut rcc = dp.RCC.constrain();
    let clocks = rcc.cfgr.freeze(&mut flash.acr);
    let gpioa = dp.GPIOA.split(&mut rcc.apb2);
    let mut gpiob = dp.GPIOB.split(&mut rcc.apb2);
 
    let nss = gpiob.pb12.into_push_pull_output(&mut gpiob.crh);
    let sck = gpiob.pb13.into_alternate_push_pull(&mut gpiob.crh);
    let miso = gpiob.pb14;
    let mosi = gpiob.pb15.into_alternate_push_pull(&mut gpiob.crh);
    let rdy = gpioa.pa8;
 
    let spi1 = Spi::spi2(
        dp.SPI2,
        (sck, miso, mosi),
        max31865::MODE,
        100_000.hz(),
        clocks,
        &mut rcc.apb1,
    );
 
    let mut max31865 = Max31865::new(spi1, nss, rdy).unwrap();
    max31865.set_calibration(43234).unwrap();
    max31865.configure(true, true, false, SensorType::ThreeWire, FilterMode::Filter50Hz).unwrap();
 
    let mut last = 0;
 
    loop {
        if max31865.is_ready().unwrap() {
            let temp = max31865.read_default_conversion().unwrap();
 
            if temp != last {
                last = temp;
                // temperature in Celcius = temp / 100
            }
        }
 
    }
}
 
exception!(HardFault, hard_fault);
 
fn hard_fault(ef: &ExceptionFrame) -> ! {
    panic!("{:#?}", ef)
}
 
exception!(*, default_handler);
 
fn default_handler(irqn: i16) {
    panic!("Unhandled exception (IRQn = {})", irqn);
}