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#![allow(non_snake_case, non_upper_case_globals)]
#![allow(non_camel_case_types)]
//! Reset and clock control
//!
//! Used by: stm32f405, stm32f407
#[cfg(not(feature = "nosync"))]
pub use crate::stm32f4::peripherals::rcc::Instance;
pub use crate::stm32f4::peripherals::rcc::{RegisterBlock, ResetValues};
pub use crate::stm32f4::peripherals::rcc::{
AHB1ENR, AHB1LPENR, AHB1RSTR, AHB2ENR, AHB2LPENR, AHB2RSTR, AHB3ENR, AHB3LPENR, AHB3RSTR,
APB1ENR, APB1LPENR, APB1RSTR, APB2ENR, APB2LPENR, APB2RSTR, BDCR, CFGR, CIR, CR, CSR, PLLCFGR,
PLLI2SCFGR, SSCGR,
};
/// Access functions for the RCC peripheral instance
pub mod RCC {
use super::ResetValues;
#[cfg(not(feature = "nosync"))]
use super::Instance;
#[cfg(not(feature = "nosync"))]
const INSTANCE: Instance = Instance {
addr: 0x40023800,
_marker: ::core::marker::PhantomData,
};
/// Reset values for each field in RCC
pub const reset: ResetValues = ResetValues {
CR: 0x00000083,
PLLCFGR: 0x24003010,
CFGR: 0x00000000,
CIR: 0x00000000,
AHB1RSTR: 0x00000000,
AHB2RSTR: 0x00000000,
AHB3RSTR: 0x00000000,
APB1RSTR: 0x00000000,
APB2RSTR: 0x00000000,
AHB1ENR: 0x00100000,
AHB2ENR: 0x00000000,
AHB3ENR: 0x00000000,
APB1ENR: 0x00000000,
APB2ENR: 0x00000000,
AHB1LPENR: 0x7E6791FF,
AHB2LPENR: 0x000000F1,
AHB3LPENR: 0x00000001,
APB1LPENR: 0x36FEC9FF,
APB2LPENR: 0x00075F33,
BDCR: 0x00000000,
CSR: 0x0E000000,
SSCGR: 0x00000000,
PLLI2SCFGR: 0x20003000,
};
#[cfg(not(feature = "nosync"))]
#[allow(renamed_and_removed_lints)]
#[allow(private_no_mangle_statics)]
#[no_mangle]
static mut RCC_TAKEN: bool = false;
/// Safe access to RCC
///
/// 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 RCC_TAKEN {
None
} else {
RCC_TAKEN = true;
Some(INSTANCE)
}
})
}
/// Release exclusive access to RCC
///
/// 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 RCC_TAKEN && inst.addr == INSTANCE.addr {
RCC_TAKEN = false;
} else {
panic!("Released a peripheral which was not taken");
}
});
}
/// Unsafely steal RCC
///
/// 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 {
RCC_TAKEN = true;
INSTANCE
}
}
/// Raw pointer to RCC
///
/// 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 RCC: *const RegisterBlock = 0x40023800 as *const _;