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v1.rs
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v1.rs
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use embassy_hal_internal::{into_ref, PeripheralRef};
use crate::pac::CRC as PAC_CRC;
use crate::peripherals::CRC;
use crate::rcc::SealedRccPeripheral;
use crate::Peripheral;
/// CRC driver.
pub struct Crc<'d> {
_peri: PeripheralRef<'d, CRC>,
}
impl<'d> Crc<'d> {
/// Instantiates the CRC32 peripheral and initializes it to default values.
pub fn new(peripheral: impl Peripheral<P = CRC> + 'd) -> Self {
into_ref!(peripheral);
// Note: enable and reset come from RccPeripheral.
// enable CRC clock in RCC.
CRC::enable_and_reset();
// Peripheral the peripheral
let mut instance = Self { _peri: peripheral };
instance.reset();
instance
}
/// Resets the CRC unit to default value (0xFFFF_FFFF)
pub fn reset(&mut self) {
PAC_CRC.cr().write(|w| w.set_reset(true));
}
/// Feeds a word to the peripheral and returns the current CRC value
pub fn feed_word(&mut self, word: u32) -> u32 {
// write a single byte to the device, and return the result
#[cfg(not(crc_v1))]
PAC_CRC.dr32().write_value(word);
#[cfg(crc_v1)]
PAC_CRC.dr().write_value(word);
self.read()
}
/// Feed a slice of words to the peripheral and return the result.
pub fn feed_words(&mut self, words: &[u32]) -> u32 {
for word in words {
#[cfg(not(crc_v1))]
PAC_CRC.dr32().write_value(*word);
#[cfg(crc_v1)]
PAC_CRC.dr().write_value(*word);
}
self.read()
}
/// Read the CRC result value.
#[cfg(not(crc_v1))]
pub fn read(&self) -> u32 {
PAC_CRC.dr32().read()
}
/// Read the CRC result value.
#[cfg(crc_v1)]
pub fn read(&self) -> u32 {
PAC_CRC.dr().read()
}
}