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#![no_std]
#![feature(generic_associated_types)]
#![feature(asm)]
#![feature(type_alias_impl_trait)]
#![allow(incomplete_features)]
#[cfg(not(any(
feature = "nrf51",
feature = "nrf52805",
feature = "nrf52810",
feature = "nrf52811",
feature = "nrf52820",
feature = "nrf52832",
feature = "nrf52833",
feature = "nrf52840",
feature = "nrf5340-app",
feature = "nrf5340-net",
feature = "nrf9160",
)))]
compile_error!("No chip feature activated. You must activate exactly one of the following features: nrf52810, nrf52811, nrf52832, nrf52833, nrf52840");
// This mod MUST go first, so that the others see its macros.
pub(crate) mod fmt;
pub(crate) mod util;
#[cfg(feature = "_time-driver")]
mod time_driver;
pub mod buffered_uarte;
pub mod gpio;
#[cfg(feature = "gpiote")]
pub mod gpiote;
pub mod ppi;
#[cfg(not(any(feature = "nrf52805", feature = "nrf52820")))]
pub mod pwm;
#[cfg(feature = "nrf52840")]
pub mod qspi;
pub mod rng;
#[cfg(not(feature = "nrf52820"))]
pub mod saadc;
pub mod spim;
pub mod timer;
pub mod twim;
pub mod uarte;
pub mod wdt;
// This mod MUST go last, so that it sees all the `impl_foo!` macros
#[cfg(feature = "nrf52805")]
#[path = "chips/nrf52805.rs"]
mod chip;
#[cfg(feature = "nrf52810")]
#[path = "chips/nrf52810.rs"]
mod chip;
#[cfg(feature = "nrf52811")]
#[path = "chips/nrf52811.rs"]
mod chip;
#[cfg(feature = "nrf52820")]
#[path = "chips/nrf52820.rs"]
mod chip;
#[cfg(feature = "nrf52832")]
#[path = "chips/nrf52832.rs"]
mod chip;
#[cfg(feature = "nrf52833")]
#[path = "chips/nrf52833.rs"]
mod chip;
#[cfg(feature = "nrf52840")]
#[path = "chips/nrf52840.rs"]
mod chip;
pub use chip::EASY_DMA_SIZE;
#[cfg(feature = "unstable-pac")]
pub use chip::pac;
#[cfg(not(feature = "unstable-pac"))]
pub(crate) use chip::pac;
pub use chip::{peripherals, Peripherals};
pub mod interrupt {
pub use crate::chip::irqs::*;
pub use cortex_m::interrupt::{CriticalSection, Mutex};
pub use embassy::interrupt::{declare, take, Interrupt};
pub use embassy_hal_common::interrupt::Priority3 as Priority;
}
pub use embassy_macros::interrupt;
pub mod config {
pub enum HfclkSource {
Internal,
ExternalXtal,
}
pub enum LfclkSource {
InternalRC,
Synthesized,
ExternalXtal,
ExternalLowSwing,
ExternalFullSwing,
}
#[non_exhaustive]
pub struct Config {
pub hfclk_source: HfclkSource,
pub lfclk_source: LfclkSource,
#[cfg(feature = "gpiote")]
pub gpiote_interrupt_priority: crate::interrupt::Priority,
#[cfg(feature = "_time-driver")]
pub time_interrupt_priority: crate::interrupt::Priority,
}
impl Default for Config {
fn default() -> Self {
Self {
// There are hobby nrf52 boards out there without external XTALs...
// Default everything to internal so it Just Works. User can enable external
// xtals if they know they have them.
hfclk_source: HfclkSource::Internal,
lfclk_source: LfclkSource::InternalRC,
#[cfg(feature = "gpiote")]
gpiote_interrupt_priority: crate::interrupt::Priority::P0,
#[cfg(feature = "_time-driver")]
time_interrupt_priority: crate::interrupt::Priority::P0,
}
}
}
}
pub fn init(config: config::Config) -> Peripherals {
// Do this first, so that it panics if user is calling `init` a second time
// before doing anything important.
let peripherals = Peripherals::take();
let r = unsafe { &*pac::CLOCK::ptr() };
// Start HFCLK.
match config.hfclk_source {
config::HfclkSource::Internal => {}
config::HfclkSource::ExternalXtal => {
// Datasheet says this is likely to take 0.36ms
r.events_hfclkstarted.write(|w| unsafe { w.bits(0) });
r.tasks_hfclkstart.write(|w| unsafe { w.bits(1) });
while r.events_hfclkstarted.read().bits() == 0 {}
}
}
// Configure LFCLK.
match config.lfclk_source {
config::LfclkSource::InternalRC => r.lfclksrc.write(|w| w.src().rc()),
config::LfclkSource::Synthesized => r.lfclksrc.write(|w| w.src().synth()),
config::LfclkSource::ExternalXtal => r.lfclksrc.write(|w| w.src().xtal()),
config::LfclkSource::ExternalLowSwing => r.lfclksrc.write(|w| {
w.src().xtal();
w.external().enabled();
w.bypass().disabled();
w
}),
config::LfclkSource::ExternalFullSwing => r.lfclksrc.write(|w| {
w.src().xtal();
w.external().enabled();
w.bypass().enabled();
w
}),
}
// Start LFCLK.
// Datasheet says this could take 100us from synth source
// 600us from rc source, 0.25s from an external source.
r.events_lfclkstarted.write(|w| unsafe { w.bits(0) });
r.tasks_lfclkstart.write(|w| unsafe { w.bits(1) });
while r.events_lfclkstarted.read().bits() == 0 {}
// Init GPIOTE
#[cfg(feature = "gpiote")]
gpiote::init(config.gpiote_interrupt_priority);
// init RTC time driver
#[cfg(feature = "_time-driver")]
time_driver::init(config.time_interrupt_priority);
peripherals
}
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