create interface around the clock

src/clock.rs

@@ -0,0 +1,20 @@
+use chrono::prelude::*;
+use cmos::{CMOSCenturyHandler, CMOS};
+use core::convert::TryInto;
+use lazy_static::lazy_static;
+use spin::Mutex;
+
+lazy_static! {
+    static ref CLOCK: Mutex<CMOS> = Mutex::new(unsafe { CMOS::new() });
+}
+
+pub fn current_time() -> DateTime<Utc> {
+    let rtc = CLOCK.lock().read_rtc(CMOSCenturyHandler::CurrentYear(2019));
+    return Utc
+        .ymd(
+            rtc.year.try_into().unwrap(),
+            rtc.month.into(),
+            rtc.day.into(),
+        )
+        .and_hms(rtc.hour.into(), rtc.minute.into(), rtc.second.into());
+}

src/lib.rs

@@ -9,6 +9,7 @@
 extern crate alloc;
 
 pub mod allocator;
+pub mod clock;
 pub mod gdt;
 pub mod interrupts;
 pub mod memory;

src/main.rs

@@ -6,6 +6,7 @@
 
 extern crate alloc;
 
+use alloc::string::ToString;
 use bootloader::{entry_point, BootInfo};
 use core::panic::PanicInfo;
 use xe_os::println;
@@ -13,21 +14,14 @@ use xe_os::println;
 entry_point!(kernel_main);
 
 fn kernel_main(boot_info: &'static BootInfo) -> ! {
-    use cmos::{CMOSCenturyHandler, CMOS};
-    // Create a CMOS object (unsafe due to the use of port I/O)
-    let mut cmos = unsafe { CMOS::new() };
-
     xe_os::init(&boot_info);
 
     #[cfg(test)]
     test_main();
 
     // Read the rtc date time using this year
-    let rtc = cmos.read_rtc(CMOSCenturyHandler::CurrentYear(2019));
+    let now = xe_os::clock::current_time();
-    println!(
+    println!("{}", now.to_string());
-        "current time: {}:{}:{} {} M{} {}",
-        rtc.hour, rtc.minute, rtc.second, rtc.year, rtc.month, rtc.day
-    );
 
     println!("Running WASM:");