//! # sdio_sdhc
//! You can drive sdhc card in your stm32f407 board, other stm32f4xx boards have no test.
//! if you want to test other boards, you can edit library and feature:
//!
//! ```
//! stm32fxxx-hal = { version = "xxx", features = ["xxx"] }
//! ```
//! first you need to init some GPIO, like this:
//!
//! ```rust
//! fn gpio_init(
//!    rcc: &mut stm32::RCC,
//!    gpioc: &mut stm32::GPIOC,
//!    gpiod: &mut stm32::GPIOD,
//! ) {
//!    // gpioc gpiod enable
//!    rcc.ahb1enr.modify(|_r, w| w.gpiocen().set_bit().gpioden().set_bit());
//!
//!   gpioc.afrh.modify(|_r, w|
//!       w.afrh8().af12()
//!            .afrh9().af12()
//!            .afrh10().af12()
//!            .afrh11().af12()
//!            .afrh12().af12());
//!    gpiod.afrl.modify(|_r, w| w.afrl2().af12());
//!
//!    gpioc.moder.modify(|_r, w|
//!        w.moder8().alternate()
//!            .moder9().alternate()
//!            .moder10().alternate()
//!            .moder11().alternate()
//!            .moder12().alternate());
//!    gpiod.moder.modify(|_r, w| w.moder2().alternate());
//!
//!    gpioc.ospeedr.modify(|_r, w|
//!        w.ospeedr8().high_speed()
//!            .ospeedr9().high_speed()
//!            .ospeedr10().high_speed()
//!            .ospeedr11().high_speed()
//!            .ospeedr12().high_speed());
//!    gpiod.ospeedr.modify(|_r, w| w.ospeedr2().high_speed());
//!
//!    gpioc.otyper.modify(|_r, w|
//!        w.ot8().push_pull()
//!            .ot9().push_pull()
//!            .ot10().push_pull()
//!            .ot11().push_pull()
//!            .ot12().push_pull());
//!    gpiod.otyper.modify(|_r, w| w.ot2().push_pull());
//!
//!    gpioc.pupdr.modify(|_r, w|
//!        w.pupdr8().pull_up()
//!            .pupdr9().pull_up()
//!            .pupdr10().pull_up()
//!            .pupdr11().pull_up()
//!            .pupdr12().pull_up());
//!    gpiod.pupdr.modify(|_r, w| w.pupdr2().pull_up());
//!}
//!```
//! then you can drive your sdhc card, and do some tests
//!
//! ```rust
//!    let card = Card::init().unwrap();
//!    writeln!(USART1, "{:#?}", card).unwrap();
//!    card.erase(0, card.capacity).unwrap();
//!
//!    let buf = [1; 512 * 2];
//!    card.write_multi_blocks(&buf, 0, 2).unwrap();
//!
//!    let mut buf = [0; 512 * 2];
//!    card.read_multi_blocks(&mut buf, 0, 2).unwrap();
//!    writeln!(USART1, "{:?}", &buf[0..buf.len()]).unwrap();
//!
//!    let buf = [2; 512];
//!    card.write_block(&buf, 512).unwrap();
//!
//!    let mut buf = [0; 512];
//!    card.read_block(&mut buf, 512).unwrap();
//!    writeln!(USART1, "{:?}", &buf[0..buf.len()]).unwrap();
//!```
//!
//! will print in your ttl like this:
//! ```
//!Card {
//!    capacity: 3963617280,
//!    block_size: 512,
//!    rca: 1,
//! }
//!
//! [1, 1, 1, .......]
//! [2, 2, 2, .......]
//! ```
//! ## How to support fat32 filesystem
//!
//! You can add feature like this. Visit [fat32](https://github.com/play-stm32/fat32) to check out usages for details
//! ```
//! sdio_sdhc = { version = "0.2", features = ["filesystem"] }
//! ````
//!
#![no_std]

pub mod sdcard;
pub mod sdio_dma;

// to support filesystem
#[cfg(feature = "filesystem")]
pub mod fat32;
