161 lines
4.6 KiB
Rust
161 lines
4.6 KiB
Rust
#![macro_use]
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use crate::peripherals;
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use crate::time::Hertz;
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use core::mem::MaybeUninit;
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#[cfg_attr(any(rcc_f0, rcc_f0x0), path = "f0.rs")]
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#[cfg_attr(rcc_f1, path = "f1.rs")]
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#[cfg_attr(rcc_f3, path = "f3.rs")]
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#[cfg_attr(any(rcc_f4, rcc_f410), path = "f4.rs")]
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#[cfg_attr(rcc_f7, path = "f7.rs")]
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#[cfg_attr(rcc_g0, path = "g0.rs")]
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#[cfg_attr(rcc_g4, path = "g4.rs")]
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#[cfg_attr(any(rcc_h7, rcc_h7ab), path = "h7.rs")]
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#[cfg_attr(rcc_l0, path = "l0.rs")]
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#[cfg_attr(rcc_l1, path = "l1.rs")]
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#[cfg_attr(rcc_l4, path = "l4.rs")]
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#[cfg_attr(rcc_u5, path = "u5.rs")]
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#[cfg_attr(rcc_wb, path = "wb.rs")]
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#[cfg_attr(rcc_wl5, path = "wl5.rs")]
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mod _version;
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pub use _version::*;
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#[derive(Clone, Copy)]
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pub struct Clocks {
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pub sys: Hertz,
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#[cfg(rcc_g0)]
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pub apb: Hertz,
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#[cfg(rcc_g0)]
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pub apb_tim: Hertz,
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#[cfg(not(rcc_g0))]
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pub apb1: Hertz,
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#[cfg(not(rcc_g0))]
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pub apb1_tim: Hertz,
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#[cfg(not(rcc_g0))]
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pub apb2: Hertz,
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#[cfg(not(rcc_g0))]
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pub apb2_tim: Hertz,
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#[cfg(any(rcc_wl5, rcc_u5))]
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pub apb3: Hertz,
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#[cfg(any(rcc_l0, rcc_l1, rcc_f0, rcc_f1, rcc_f3, rcc_f0x0, rcc_g0))]
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pub ahb: Hertz,
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#[cfg(any(rcc_l4, rcc_f4, rcc_f7, rcc_h7, rcc_g4, rcc_u5, rcc_wb, rcc_wl5))]
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pub ahb1: Hertz,
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#[cfg(any(rcc_l4, rcc_f4, rcc_f7, rcc_h7, rcc_g4, rcc_u5, rcc_wb, rcc_wl5))]
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pub ahb2: Hertz,
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#[cfg(any(rcc_l4, rcc_f4, rcc_f7, rcc_h7, rcc_u5, rcc_wb, rcc_wl5))]
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pub ahb3: Hertz,
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#[cfg(any(rcc_h7))]
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pub ahb4: Hertz,
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#[cfg(any(rcc_h7))]
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pub apb4: Hertz,
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#[cfg(any(rcc_f4, rcc_f7))]
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pub pll48: Option<Hertz>,
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#[cfg(rcc_f1)]
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pub adc: Hertz,
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}
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/// Frozen clock frequencies
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///
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/// The existence of this value indicates that the clock configuration can no longer be changed
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static mut CLOCK_FREQS: MaybeUninit<Clocks> = MaybeUninit::uninit();
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/// Sets the clock frequencies
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///
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/// Safety: Sets a mutable global.
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pub(crate) unsafe fn set_freqs(freqs: Clocks) {
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CLOCK_FREQS.as_mut_ptr().write(freqs);
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}
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/// Safety: Reads a mutable global.
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pub(crate) unsafe fn get_freqs() -> &'static Clocks {
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&*CLOCK_FREQS.as_ptr()
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}
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pub(crate) mod sealed {
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pub trait RccPeripheral {
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fn frequency() -> crate::time::Hertz;
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fn reset();
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fn enable();
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fn disable();
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}
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}
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pub trait RccPeripheral: sealed::RccPeripheral + 'static {}
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crate::pac::peripheral_rcc!(
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($inst:ident, gpio, GPIO, $clk:ident, $en:tt, $rst:tt) => {};
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($inst:ident, $module:ident, $block:ident, $clk:ident, ($en_reg:ident, $en_field:ident, $en_set_field:ident), ($rst_reg:ident, $rst_field:ident, $rst_set_field:ident)) => {
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impl sealed::RccPeripheral for peripherals::$inst {
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fn frequency() -> crate::time::Hertz {
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critical_section::with(|_| {
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unsafe { get_freqs().$clk }
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})
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}
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fn enable() {
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critical_section::with(|_| {
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unsafe {
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crate::pac::RCC.$en_reg().modify(|w| w.$en_set_field(true));
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}
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})
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}
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fn disable() {
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critical_section::with(|_| {
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unsafe {
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crate::pac::RCC.$en_reg().modify(|w| w.$en_set_field(false));
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}
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})
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}
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fn reset() {
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critical_section::with(|_| {
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unsafe {
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crate::pac::RCC.$rst_reg().modify(|w| w.$rst_set_field(true));
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crate::pac::RCC.$rst_reg().modify(|w| w.$rst_set_field(false));
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}
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})
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}
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}
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impl RccPeripheral for peripherals::$inst {}
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};
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($inst:ident, $module:ident, $block:ident, $clk:ident, ($en_reg:ident, $en_field:ident, $en_set_field:ident), _) => {
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impl sealed::RccPeripheral for peripherals::$inst {
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fn frequency() -> crate::time::Hertz {
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critical_section::with(|_| {
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unsafe { get_freqs().$clk }
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})
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}
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fn enable() {
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critical_section::with(|_| {
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unsafe {
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crate::pac::RCC.$en_reg().modify(|w| w.$en_set_field(true));
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}
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})
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}
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fn disable() {
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critical_section::with(|_| {
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unsafe {
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crate::pac::RCC.$en_reg().modify(|w| w.$en_set_field(false));
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}
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})
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}
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fn reset() {}
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}
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impl RccPeripheral for peripherals::$inst {}
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};
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);
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