firmware/zynq7000-hal/CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Changed
 
+- Added division by zero check in gtc frequency_to_ticks to avoid runtime panic
 - Increased UART type safety by providing dedicated MIO constructors for UART 0 and UART 1
   respectively.
 - Several bugfixes and improvements for GIC module. Some of the registers previously were

firmware/zynq7000-hal/src/gtc.rs

@@ -18,7 +18,11 @@ unsafe impl Send for GlobalTimerCounter {}
 
 /// Convert a frequency to GTC ticks given a clock frequency.
 pub const fn frequency_to_ticks(clock: Hertz, frequency: Hertz) -> u32 {
-    clock.raw().div_ceil(frequency.raw())
+    if frequency.raw() != 0 {
+        clock.raw().div_ceil(frequency.raw())
+    } else {
+        0
+    }
 }
 
 impl GlobalTimerCounter {