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#![allow(non_snake_case, non_upper_case_globals)]
#![allow(non_camel_case_types)]
//! Flexible static memory controller
//!
//! Used by: stm32f405, stm32f407
#[cfg(not(feature = "nosync"))]
pub use crate::stm32f4::peripherals::fsmc::Instance;
pub use crate::stm32f4::peripherals::fsmc::{RegisterBlock, ResetValues};
pub use crate::stm32f4::peripherals::fsmc::{
BCR1, BCR2, BCR3, BCR4, BTR1, BTR2, BTR3, BTR4, BWTR1, BWTR2, BWTR3, BWTR4, ECCR2, ECCR3,
PATT2, PATT3, PATT4, PCR2, PCR3, PCR4, PIO4, PMEM2, PMEM3, PMEM4, SR2, SR3, SR4,
};
/// Access functions for the FSMC peripheral instance
pub mod FSMC {
use super::ResetValues;
#[cfg(not(feature = "nosync"))]
use super::Instance;
#[cfg(not(feature = "nosync"))]
const INSTANCE: Instance = Instance {
addr: 0xa0000000,
_marker: ::core::marker::PhantomData,
};
/// Reset values for each field in FSMC
pub const reset: ResetValues = ResetValues {
BCR1: 0x000030D0,
BTR1: 0xFFFFFFFF,
BTR2: 0xFFFFFFFF,
BTR3: 0xFFFFFFFF,
BTR4: 0xFFFFFFFF,
BCR2: 0x000030D0,
BCR3: 0x000030D0,
BCR4: 0x000030D0,
PCR2: 0x00000018,
PCR3: 0x00000018,
PCR4: 0x00000018,
SR2: 0x00000040,
SR3: 0x00000040,
SR4: 0x00000040,
PMEM2: 0xFCFCFCFC,
PATT2: 0xFCFCFCFC,
ECCR2: 0x00000000,
PMEM3: 0xFCFCFCFC,
PATT3: 0xFCFCFCFC,
ECCR3: 0x00000000,
PMEM4: 0xFCFCFCFC,
PATT4: 0xFCFCFCFC,
PIO4: 0xFCFCFCFC,
BWTR1: 0x0FFFFFFF,
BWTR2: 0x0FFFFFFF,
BWTR3: 0x0FFFFFFF,
BWTR4: 0x0FFFFFFF,
};
#[cfg(not(feature = "nosync"))]
#[allow(renamed_and_removed_lints)]
#[allow(private_no_mangle_statics)]
#[no_mangle]
static mut FSMC_TAKEN: bool = false;
/// Safe access to FSMC
///
/// 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 FSMC_TAKEN {
None
} else {
FSMC_TAKEN = true;
Some(INSTANCE)
}
})
}
/// Release exclusive access to FSMC
///
/// 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 FSMC_TAKEN && inst.addr == INSTANCE.addr {
FSMC_TAKEN = false;
} else {
panic!("Released a peripheral which was not taken");
}
});
}
/// Unsafely steal FSMC
///
/// 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 {
FSMC_TAKEN = true;
INSTANCE
}
}
/// Raw pointer to FSMC
///
/// 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 FSMC: *const RegisterBlock = 0xa0000000 as *const _;