Trait imxrt_hal::dma::peripheral::Source

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pub unsafe trait Source<E>where
    E: Element,{
    // Required methods
    fn source_signal(&self) -> u32;
    fn source_address(&self) -> *const E;
    fn enable_source(&mut self);
    fn disable_source(&mut self);
}

Expand description

A peripheral that can be the source of DMA data

By ‘source,’ we mean that it provides data for a DMA transfer. A source would be a hardware device writing data into memory, like a UART receiver.

Safety

Source should only be implemented on peripherals that are DMA capable. This trait should be implemented by HAL authors who are exposing DMA capable peripherals.

Required Methods§

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fn source_signal(&self) -> u32

Peripheral source request signal

See Table 4-3 of the reference manual. A source may has a qualifier like ‘receive’ in the name.

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fn source_address(&self) -> *const E

Returns a pointer to the register from which the DMA channel reads data

This is the register that software reads to acquire data from a device. The type of the pointer describes the type of reads the DMA channel performs when transferring data.

This memory is assumed to be static. Repeated source calls should always return the same address.

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