Fix wait_advregen_startup

Author: Sh3Rm4n

src/adc.rs

@@ -15,6 +15,8 @@ use cortex_m::asm;
 use embedded_hal::adc::{Channel, OneShot};
 
 use crate::time::rate::{Generic, Hertz};
+use crate::time::duration::Microseconds;
+use crate::time::fixed_point::FixedPoint;
 
 use crate::gpio::{self, Analog};
 use crate::pac::RCC;
@@ -34,7 +36,7 @@ use stm32f3::Variant;
 ))]
 use crate::pac::{ADC1, ADC1_2, ADC2, ADC3, ADC3_4, ADC4};
 
-const MAX_ADVREGEN_STARTUP_US: u32 = 10;
+const MAX_ADVREGEN_STARTUP: Microseconds = Microseconds(10);
 
 /// Analog Digital Converter Peripheral
 // TODO: Remove `pub` from the register block once all functionalities are implemented.
@@ -432,7 +434,10 @@ where
     ///
     /// This is based on the MAX_ADVREGEN_STARTUP_US of the device.
     fn wait_advregen_startup(&self, clocks: Clocks) {
-        asm::delay((MAX_ADVREGEN_STARTUP_US * 1_000_000) / clocks.sysclk().0);
+        let wait = MAX_ADVREGEN_STARTUP.integer()
+            * clocks.sysclk().integer()
+            * <Microseconds as FixedPoint>::SCALING_FACTOR;
+        asm::delay(wait);
     }
 
     /// busy ADC read