Speed up timer test

Author: jonathanpallant

examples/mps3-an536/reference/generic_timer-armv8r-none-eabihf.out

@@ -1,23 +1,23 @@
 cntfrq = 62.500 MHz
 Using physical timer ************************
-Print five, one per second...
+Print five, every 100ms...
 i = 0
 i = 1
 i = 2
 i = 3
 i = 4
-Waiting for 125000000 physical ticks to count up...
+Waiting for 31250000 physical ticks to count up...
 Matched! physical
-Waiting for 125000000 physical ticks to count down...
+Waiting for 31250000 physical ticks to count down...
 physical countdown hit zero!
 Using virtual timer ************************
-Print five, one per second...
+Print five, every 100ms...
 i = 0
 i = 1
 i = 2
 i = 3
 i = 4
-Waiting for 125000000 virtual ticks to count up...
+Waiting for 31250000 virtual ticks to count up...
 Matched! virtual
-Waiting for 125000000 virtual ticks to count down...
+Waiting for 31250000 virtual ticks to count down...
 virtual countdown hit zero!

examples/mps3-an536/src/bin/generic_timer.rs

@@ -23,7 +23,7 @@ fn main() {
     let cntfrq = cortex_ar::register::Cntfrq::read().0;
     println!("cntfrq = {:.03} MHz", cntfrq as f32 / 1_000_000.0);
 
-    let delay_ticks = cntfrq * 2;
+    let delay_ticks = cntfrq / 2;
 
     let mut pgt = unsafe { El1PhysicalTimer::new() };
     let mut vgt = unsafe { El1VirtualTimer::new() };
@@ -34,10 +34,10 @@ fn main() {
     for (timer, name) in [(pgt_ref, "physical"), (vgt_ref, "virtual")] {
         println!("Using {} timer ************************", name);
 
-        println!("Print five, one per second...");
+        println!("Print five, every 100ms...");
         for i in 0..5 {
             println!("i = {}", i);
-            timer.delay_ms(1000);
+            timer.delay_ms(100);
         }
 
         let now = timer.counter();