OSTimer updates (#24)

* Initialize OSTIMER0 during HAL initialization

Provide the user with a working time driver.

Signed-off-by: Felipe Balbi <[email protected]>

* Handle time_driver interrupt internally

Signed-off-by: Felipe Balbi <[email protected]>

* Gate `time-driver` impl behind a `time` flag

Also prevents creation of an `Ostimer` instance if the `time`
feature is active.

* Remove some dead code

---------

Signed-off-by: Felipe Balbi <[email protected]>
Co-authored-by: James Munns <[email protected]>

1 files changed, 10 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index c885ecc50..e93ff61a6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,6 +14,9 @@ pub mod lpuart;
 pub mod ostimer;
 pub mod rtc;
 
+#[cfg(feature = "rt")]
+pub use crate::pac::NVIC_PRIO_BITS;
+
 #[rustfmt::skip]
 embassy_hal_internal::peripherals!(
     ADC0,
@@ -83,6 +86,8 @@ embassy_hal_internal::peripherals!(
     MBC0,
     MRCC0,
     OPAMP0,
+
+    #[cfg(not(feature = "time"))]
     OSTIMER0,
 
     P0_0,
@@ -335,7 +340,6 @@ pub use interrupt::InterruptExt;
 pub use mcxa_pac as pac;
 #[cfg(not(feature = "unstable-pac"))]
 pub(crate) use mcxa_pac as pac;
-pub use ostimer::Ostimer0 as Ostimer0Token;
 pub use rtc::Rtc0 as Rtc0Token;
 
 /// Initialize HAL with configuration (mirrors embassy-imxrt style). Minimal: just take peripherals.
@@ -343,6 +347,7 @@ pub use rtc::Rtc0 as Rtc0Token;
 pub fn init(cfg: crate::config::Config) -> Peripherals {
     let peripherals = Peripherals::take();
     // Apply user-configured priority early; enabling is left to examples/apps
+    #[cfg(feature = "time")]
     crate::interrupt::OS_EVENT.set_priority(cfg.time_interrupt_priority);
     // Apply user-configured priority early; enabling is left to examples/apps
     crate::interrupt::RTC.set_priority(cfg.rtc_interrupt_priority);
@@ -352,6 +357,10 @@ pub fn init(cfg: crate::config::Config) -> Peripherals {
     // Configure clocks
     crate::clocks::init(cfg.clock_cfg).unwrap();
 
+    // Initialize embassy-time global driver backed by OSTIMER0
+    #[cfg(feature = "time")]
+    crate::ostimer::time_driver::init(crate::config::Config::default().time_interrupt_priority, 1_000_000);
+
     // Enable GPIO clocks
     unsafe {
         _ = crate::clocks::enable_and_reset::<crate::peripherals::PORT0>(&crate::clocks::periph_helpers::NoConfig);