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#![allow(non_snake_case, non_upper_case_globals)]
#![allow(non_camel_case_types)]
//! Direct memory access controller
//!
//! Used by: stm32l4r5, stm32l4r9
#[cfg(not(feature = "nosync"))]
pub use crate::stm32l4::peripherals::dma_v2::Instance;
pub use crate::stm32l4::peripherals::dma_v2::{RegisterBlock, ResetValues};
pub use crate::stm32l4::peripherals::dma_v2::{
CCR1, CCR2, CCR3, CCR4, CCR5, CCR6, CCR7, CMAR1, CMAR2, CMAR3, CMAR4, CMAR5, CMAR6, CMAR7,
CNDTR1, CNDTR2, CNDTR3, CNDTR4, CNDTR5, CNDTR6, CNDTR7, CPAR1, CPAR2, CPAR3, CPAR4, CPAR5,
CPAR6, CPAR7, IFCR, ISR,
};
/// Access functions for the DMA1 peripheral instance
pub mod DMA1 {
use super::ResetValues;
#[cfg(not(feature = "nosync"))]
use super::Instance;
#[cfg(not(feature = "nosync"))]
const INSTANCE: Instance = Instance {
addr: 0x40020000,
_marker: ::core::marker::PhantomData,
};
/// Reset values for each field in DMA1
pub const reset: ResetValues = ResetValues {
ISR: 0x00000000,
IFCR: 0x00000000,
CCR1: 0x00000000,
CNDTR1: 0x00000000,
CPAR1: 0x00000000,
CMAR1: 0x00000000,
CCR2: 0x00000000,
CNDTR2: 0x00000000,
CPAR2: 0x00000000,
CMAR2: 0x00000000,
CCR3: 0x00000000,
CNDTR3: 0x00000000,
CPAR3: 0x00000000,
CMAR3: 0x00000000,
CCR4: 0x00000000,
CNDTR4: 0x00000000,
CPAR4: 0x00000000,
CMAR4: 0x00000000,
CCR5: 0x00000000,
CNDTR5: 0x00000000,
CPAR5: 0x00000000,
CMAR5: 0x00000000,
CCR6: 0x00000000,
CNDTR6: 0x00000000,
CPAR6: 0x00000000,
CMAR6: 0x00000000,
CCR7: 0x00000000,
CNDTR7: 0x00000000,
CPAR7: 0x00000000,
CMAR7: 0x00000000,
};
#[cfg(not(feature = "nosync"))]
#[allow(renamed_and_removed_lints)]
#[allow(private_no_mangle_statics)]
#[no_mangle]
static mut DMA1_TAKEN: bool = false;
/// Safe access to DMA1
///
/// This function returns `Some(Instance)` if this instance is not
/// currently taken, and `None` if it is. This ensures that if you
/// do get `Some(Instance)`, you are ensured unique access to
/// the peripheral and there cannot be data races (unless other
/// code uses `unsafe`, of course). You can then pass the
/// `Instance` around to other functions as required. When you're
/// done with it, you can call `release(instance)` to return it.
///
/// `Instance` itself dereferences to a `RegisterBlock`, which
/// provides access to the peripheral's registers.
#[cfg(not(feature = "nosync"))]
#[inline]
pub fn take() -> Option<Instance> {
external_cortex_m::interrupt::free(|_| unsafe {
if DMA1_TAKEN {
None
} else {
DMA1_TAKEN = true;
Some(INSTANCE)
}
})
}
/// Release exclusive access to DMA1
///
/// This function allows you to return an `Instance` so that it
/// is available to `take()` again. This function will panic if
/// you return a different `Instance` or if this instance is not
/// already taken.
#[cfg(not(feature = "nosync"))]
#[inline]
pub fn release(inst: Instance) {
external_cortex_m::interrupt::free(|_| unsafe {
if DMA1_TAKEN && inst.addr == INSTANCE.addr {
DMA1_TAKEN = false;
} else {
panic!("Released a peripheral which was not taken");
}
});
}
/// Unsafely steal DMA1
///
/// This function is similar to take() but forcibly takes the
/// Instance, marking it as taken irregardless of its previous
/// state.
#[cfg(not(feature = "nosync"))]
#[inline]
pub unsafe fn steal() -> Instance {
DMA1_TAKEN = true;
INSTANCE
}
}
/// Raw pointer to DMA1
///
/// Dereferencing this is unsafe because you are not ensured unique
/// access to the peripheral, so you may encounter data races with
/// other users of this peripheral. It is up to you to ensure you
/// will not cause data races.
///
/// This constant is provided for ease of use in unsafe code: you can
/// simply call for example `write_reg!(gpio, GPIOA, ODR, 1);`.
pub const DMA1: *const RegisterBlock = 0x40020000 as *const _;
/// Access functions for the DMA2 peripheral instance
pub mod DMA2 {
use super::ResetValues;
#[cfg(not(feature = "nosync"))]
use super::Instance;
#[cfg(not(feature = "nosync"))]
const INSTANCE: Instance = Instance {
addr: 0x40020400,
_marker: ::core::marker::PhantomData,
};
/// Reset values for each field in DMA2
pub const reset: ResetValues = ResetValues {
ISR: 0x00000000,
IFCR: 0x00000000,
CCR1: 0x00000000,
CNDTR1: 0x00000000,
CPAR1: 0x00000000,
CMAR1: 0x00000000,
CCR2: 0x00000000,
CNDTR2: 0x00000000,
CPAR2: 0x00000000,
CMAR2: 0x00000000,
CCR3: 0x00000000,
CNDTR3: 0x00000000,
CPAR3: 0x00000000,
CMAR3: 0x00000000,
CCR4: 0x00000000,
CNDTR4: 0x00000000,
CPAR4: 0x00000000,
CMAR4: 0x00000000,
CCR5: 0x00000000,
CNDTR5: 0x00000000,
CPAR5: 0x00000000,
CMAR5: 0x00000000,
CCR6: 0x00000000,
CNDTR6: 0x00000000,
CPAR6: 0x00000000,
CMAR6: 0x00000000,
CCR7: 0x00000000,
CNDTR7: 0x00000000,
CPAR7: 0x00000000,
CMAR7: 0x00000000,
};
#[cfg(not(feature = "nosync"))]
#[allow(renamed_and_removed_lints)]
#[allow(private_no_mangle_statics)]
#[no_mangle]
static mut DMA2_TAKEN: bool = false;
/// Safe access to DMA2
///
/// This function returns `Some(Instance)` if this instance is not
/// currently taken, and `None` if it is. This ensures that if you
/// do get `Some(Instance)`, you are ensured unique access to
/// the peripheral and there cannot be data races (unless other
/// code uses `unsafe`, of course). You can then pass the
/// `Instance` around to other functions as required. When you're
/// done with it, you can call `release(instance)` to return it.
///
/// `Instance` itself dereferences to a `RegisterBlock`, which
/// provides access to the peripheral's registers.
#[cfg(not(feature = "nosync"))]
#[inline]
pub fn take() -> Option<Instance> {
external_cortex_m::interrupt::free(|_| unsafe {
if DMA2_TAKEN {
None
} else {
DMA2_TAKEN = true;
Some(INSTANCE)
}
})
}
/// Release exclusive access to DMA2
///
/// This function allows you to return an `Instance` so that it
/// is available to `take()` again. This function will panic if
/// you return a different `Instance` or if this instance is not
/// already taken.
#[cfg(not(feature = "nosync"))]
#[inline]
pub fn release(inst: Instance) {
external_cortex_m::interrupt::free(|_| unsafe {
if DMA2_TAKEN && inst.addr == INSTANCE.addr {
DMA2_TAKEN = false;
} else {
panic!("Released a peripheral which was not taken");
}
});
}
/// Unsafely steal DMA2
///
/// This function is similar to take() but forcibly takes the
/// Instance, marking it as taken irregardless of its previous
/// state.
#[cfg(not(feature = "nosync"))]
#[inline]
pub unsafe fn steal() -> Instance {
DMA2_TAKEN = true;
INSTANCE
}
}
/// Raw pointer to DMA2
///
/// Dereferencing this is unsafe because you are not ensured unique
/// access to the peripheral, so you may encounter data races with
/// other users of this peripheral. It is up to you to ensure you
/// will not cause data races.
///
/// This constant is provided for ease of use in unsafe code: you can
/// simply call for example `write_reg!(gpio, GPIOA, ODR, 1);`.
pub const DMA2: *const RegisterBlock = 0x40020400 as *const _;