Implemet getter for raw systick register

prog/sources/time.cpp

@@ -38,3 +38,7 @@ void systickInterruptServiceRoutine (SECTION_MODE) {
 uint32_t millis(ANY_MODE) {
 	return gUptime;
 }
+
+uint32_t systick(ANY_MODE) {
+	return SYST_CVR;
+}

prog/sources/time.h

@@ -14,3 +14,5 @@ void busyWaitUntil (USER_MODE_ const uint32_t inDeadLineMS);
 void systickInterruptServiceRoutine (SECTION_MODE) asm ("interrupt.section.SysTick");
 
 uint32_t millis(ANY_MODE);
+
+uint32_t systick(ANY_MODE);