#![no_main]
#![no_std]
use log::info;
use cortex_m_rt::entry;
use stm32h7xx_hal::{
adc, delay::Delay, pac, prelude::*, rcc::rec::AdcClkSel, traits::DacOut,
};
#[macro_use]
mod utilities;
#[entry]
fn main() -> ! {
utilities::logger::init();
let cp = cortex_m::Peripherals::take().unwrap();
let dp = pac::Peripherals::take().unwrap();
info!("Setup PWR... ");
let pwr = dp.PWR.constrain();
let pwrcfg = example_power!(pwr).freeze();
info!("Setup RCC... ");
let rcc = dp.RCC.constrain();
let mut ccdr = rcc.sys_ck(50.MHz()).freeze(pwrcfg, &dp.SYSCFG);
ccdr.peripheral.kernel_adc_clk_mux(AdcClkSel::Per);
info!("");
info!("stm32h7xx-hal example - DAC and ADC");
info!("");
let mut delay = Delay::new(cp.SYST, ccdr.clocks);
let mut adc1 = adc::Adc::adc1(
dp.ADC1,
16.MHz(),
&mut delay,
ccdr.peripheral.ADC12,
&ccdr.clocks,
)
.enable();
adc1.set_resolution(adc::Resolution::SixteenBit);
let gpioa = dp.GPIOA.split(ccdr.peripheral.GPIOA);
let gpioc = dp.GPIOC.split(ccdr.peripheral.GPIOC);
#[cfg(not(feature = "rm0455"))]
let dac = dp.DAC.dac(gpioa.pa4, ccdr.peripheral.DAC12);
#[cfg(feature = "rm0455")]
let dac = dp.DAC1.dac(gpioa.pa4, ccdr.peripheral.DAC1);
let mut dac = dac.calibrate_buffer(&mut delay).enable();
let mut channel = gpioc.pc0.into_analog();
dac.set_value(2048);
loop {
let reading: u32 = adc1.read(&mut channel).unwrap();
let voltage = reading as f32 * (3.3 / adc1.slope() as f32);
info!("ADC reading: {}, voltage for nucleo: {}", reading, voltage);
assert!(voltage - 1.65 < 8.25e-3); }
}