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