Новый main

Source/Drivers/Tick.cpp

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+#include "Tick.h"
+#include "stm32g4xx.h"
+
+static unsigned long Tick = 0;
+
+extern "C" void SysTick_Handler()
+{
+  Tick++;
+}
+
+void TICK_Init()
+{
+  SysTick->LOAD = SystemCoreClock / 1000;
+  SysTick->VAL = 0UL;
+  SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_TICKINT_Msk | SysTick_CTRL_ENABLE_Msk;
+
+  NVIC_SetPriority(SysTick_IRQn, 0);
+}
+
+unsigned long TICK_GetCount() // ms
+{
+  return Tick;
+}
+
+float TICK_GetTime() // s
+{
+  return ((float)Tick)/1000.0f;
+}
+
+void TICK_Delay(unsigned long us)
+{
+  long tick=SysTick->VAL;
+  long wait=us*(SystemCoreClock/1000000);
+  
+  long load = SysTick->LOAD;
+  
+  long val;
+  
+  do
+  {
+    val=SysTick->VAL;
+    
+    if(val>tick) val-=load;
+    
+  } while(tick-val < wait);
+}
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