Trait stm32f4xx_hal::i2c::dma::I2CMasterReadDMA

source · [−]

pub trait I2CMasterReadDMA {
    unsafe fn read_dma(
        &mut self,
        addr: u8,
        buf: &mut [u8],
        callback: Option<I2cCompleteCallback>
    ) -> Result<(), Error>;
}

Required Methods

source

unsafe fn read_dma(
    &mut self,
    addr: u8,
    buf: &mut [u8],
    callback: Option<I2cCompleteCallback>
) -> Result<(), Error>

Reads bytes from slave device with address addr in non-blocking mode and writes these bytes in buf

Arguments

addr - slave address
buf - byte slice where received bytes will be written
callback - callback that will be called on completion

Safety

This function relies on supplied slice buf until callback called. So the slice must live until that moment.

Warning

callback may be called before function returns value. It happens on errors in preparation stages.

Implementors