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#[cfg(dma)]
pub(crate) mod dma;
#[cfg(dma)]
pub use dma::*;
// stm32h7 has both dma and bdma. In that case, we export dma as "main" dma,
// and bdma as "secondary", under `embassy_stm32::dma::bdma`.
#[cfg(all(bdma, dma))]
pub mod bdma;
#[cfg(all(bdma, not(dma)))]
pub(crate) mod bdma;
#[cfg(all(bdma, not(dma)))]
pub use bdma::*;
#[cfg(gpdma)]
pub(crate) mod gpdma;
#[cfg(gpdma)]
pub use gpdma::*;
#[cfg(dmamux)]
mod dmamux;
pub(crate) mod ringbuffer;
pub mod word;
use core::mem;
use embassy_hal_internal::impl_peripheral;
#[cfg(dmamux)]
pub use self::dmamux::*;
use crate::interrupt::Priority;
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
enum Dir {
MemoryToPeripheral,
PeripheralToMemory,
}
pub struct NoDma;
impl_peripheral!(NoDma);
// TODO: replace transmutes with core::ptr::metadata once it's stable
#[allow(unused)]
pub(crate) fn slice_ptr_parts<T>(slice: *const [T]) -> (usize, usize) {
unsafe { mem::transmute(slice) }
}
#[allow(unused)]
pub(crate) fn slice_ptr_parts_mut<T>(slice: *mut [T]) -> (usize, usize) {
unsafe { mem::transmute(slice) }
}
// safety: must be called only once at startup
pub(crate) unsafe fn init(
#[cfg(bdma)] bdma_priority: Priority,
#[cfg(dma)] dma_priority: Priority,
#[cfg(gpdma)] gpdma_priority: Priority,
) {
#[cfg(bdma)]
bdma::init(bdma_priority);
#[cfg(dma)]
dma::init(dma_priority);
#[cfg(gpdma)]
gpdma::init(gpdma_priority);
#[cfg(dmamux)]
dmamux::init();
}
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