Adds reset for timer, otherwise it would not run. (#136)

boards/pico/examples/pico_countdown_blinky.rs

@@ -61,7 +61,7 @@ fn main() -> ! {
     .unwrap();
 
     // Configure the Timer peripheral in count-down mode
-    let timer = hal::timer::Timer::new(pac.TIMER);
+    let timer = hal::timer::Timer::new(pac.TIMER, &mut pac.RESETS);
     let mut count_down = timer.count_down();
 
     // The single-cycle I/O block controls our GPIO pins

boards/pico/examples/pico_usb_serial.rs

@@ -89,7 +89,7 @@ fn main() -> ! {
         .device_class(2) // from: https://www.usb.org/defined-class-codes
         .build();
 
-    let timer = hal::timer::Timer::new(pac.TIMER);
+    let timer = hal::timer::Timer::new(pac.TIMER, &mut pac.RESETS);
     let mut said_hello = false;
     loop {
         // A welcome message at the beginning

boards/pro_micro_rp2040/examples/pro_micro_rainbow.rs

@@ -71,7 +71,7 @@ fn main() -> ! {
 
     let _led: Pin<_, FunctionPio0> = pins.led.into_mode();
 
-    let timer = Timer::new(pac.TIMER);
+    let timer = Timer::new(pac.TIMER, &mut pac.RESETS);
     let mut delay = timer.count_down();
 
     // Configure the addressable LED

rp2040-hal/src/timer.rs

@@ -3,7 +3,8 @@
 
 use embedded_time::duration::Microseconds;
 
-use crate::pac::TIMER;
+use crate::pac::{RESETS, TIMER};
+use crate::resets::SubsystemReset;
 
 /// Timer peripheral
 pub struct Timer {
@@ -12,7 +13,8 @@ pub struct Timer {
 
 impl Timer {
     /// Create a new [`Timer`]
-    pub fn new(timer: TIMER) -> Self {
+    pub fn new(timer: TIMER, resets: &mut RESETS) -> Self {
+        timer.reset_bring_up(resets);
         Self { timer }
     }