embassy/examples/stm32f7/src/bin/sdmmc.rs

#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]

use defmt::*;
use embassy_executor::Spawner;
use embassy_stm32::sdmmc::Sdmmc;
use embassy_stm32::time::{mhz, Hertz};
use embassy_stm32::{bind_interrupts, peripherals, sdmmc, Config};
use {defmt_rtt as _, panic_probe as _};

bind_interrupts!(struct Irqs {
    SDMMC1 => sdmmc::InterruptHandler<peripherals::SDMMC1>;
});

#[embassy_executor::main]
async fn main(_spawner: Spawner) {
    let mut config = Config::default();
    {
        use embassy_stm32::rcc::*;
        config.rcc.hse = Some(Hse {
            freq: Hertz(8_000_000),
            mode: HseMode::Bypass,
        });
        config.rcc.pll_src = PllSource::HSE;
        config.rcc.pll = Some(Pll {
            prediv: PllPreDiv::DIV4,
            mul: PllMul::MUL216,
            divp: Some(PllPDiv::DIV2), // 8mhz / 4 * 216 / 2 = 216Mhz
            divq: Some(PllQDiv::DIV9), // 8mhz / 4 * 216 / 9 = 48Mhz
            divr: None,
        });
        config.rcc.ahb_pre = AHBPrescaler::DIV1;
        config.rcc.apb1_pre = APBPrescaler::DIV4;
        config.rcc.apb2_pre = APBPrescaler::DIV2;
        config.rcc.sys = Sysclk::PLL1_P;
    }
    let p = embassy_stm32::init(config);

    info!("Hello World!");

    let mut sdmmc = Sdmmc::new_4bit(
        p.SDMMC1,
        Irqs,
        p.DMA2_CH3,
        p.PC12,
        p.PD2,
        p.PC8,
        p.PC9,
        p.PC10,
        p.PC11,
        Default::default(),
    );

    // Should print 400kHz for initialization
    info!("Configured clock: {}", sdmmc.clock().0);

    unwrap!(sdmmc.init_card(mhz(25)).await);

    let card = unwrap!(sdmmc.card());

    info!("Card: {:#?}", Debug2Format(card));
}