Struct stm32f4xx_hal::crc32::Crc32

pub struct Crc32 { /* private fields */ }

A handle to a HAL CRC32 peripheral

Implementations

impl Crc32

pub fn new(crc: CRC) -> Self

Create a new Crc32 HAL peripheral

pub fn init(&mut self)

Reset the internal CRC32 state to the default value (0xFFFF_FFFF)

pub fn update(&mut self, data: &[u32]) -> u32

Feed words into the CRC engine.

The resulting calculated CRC (including this and prior data since the last call to init() is returned.

pub fn update_bytes(&mut self, data: &[u8]) -> u32

Feed bytes into the CRC engine.

The resulting calculated CRC (including this and prior data since the last call to init() is returned.

NOTE: Each four-byte chunk will be copied into a scratch buffer. This is done to ensure alignment of the data (the CRC engine only processes full words at a time). If the number of bytes passed in are not a multiple of four, the MOST significant bytes of the remaining word will be zeroes.

This should be taken into consideration if attempting to feed bytes across multiple parts (that spurious zeroes will be inserted)! To avoid this, only feed multiples of 4 bytes in before the “final” part of the message.

Example: Given the following 7 bytes:

[0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77]

The following two words will be fed into the CRC engine:

1. 0x4433_2211
2. 0x0077_6655

pub fn release(self) -> CRC

Consume the HAL peripheral, returning the PAC peripheral