Add function to get the current value of systick

The k20 example app doesn't use an interrupt, so it needs the systick value.
hackndev · Jul 15, 2014 · eed6b97 · eed6b97 · farcaller · Jul 15, 2014
1 parent 8da190e
commit eed6b97
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Showing 2 changed files with 8 additions and 3 deletions.
diff --git a/apps/app_blink_k20.rs b/apps/app_blink_k20.rs
@@ -13,10 +13,10 @@ use zinc::hal::cortex_m4::systick;
 /// Wait the given number of SysTick ticks
 pub fn wait(ticks: u32) {
   let mut n = ticks;
-  let mut t = systick::reg::SYSTICK.CURRENT();
+  let mut t = systick::get_current();
   loop {
-    if systick::reg::SYSTICK.CURRENT() > t {
-      t = systick::reg::SYSTICK.CURRENT();
+    if systick::get_current() > t {
+      t = systick::get_current();
       n -= 1;
       if n == 0 {
         break;

diff --git a/src/hal/cortex_common/systick.rs b/src/hal/cortex_common/systick.rs
@@ -56,6 +56,11 @@ pub fn disable_irq() {
   reg::SYSTICK.set_CONTROL(reg::SYSTICK.CONTROL() & !0b010);
 }
 
+/// Gets the current systick value
+pub fn get_current() -> u32 {
+  reg::SYSTICK.CURRENT()
+}
+
 mod reg {
   use lib::volatile_cell::VolatileCell;