added a function that returns a link to the STATE address of the GPIO register

variants/standart/variant.c

@@ -100,6 +100,12 @@ uint32_t* portOutputRegister(GPIO_TypeDef* GPIO_x)
   return &GPIO_x->OUTPUT_;
 }
 
+// the function returns a reference to the STATE address of the GPIO register
+uint32_t* portInputRegister(GPIO_TypeDef* GPIO_x)
+{
+  return &GPIO_x->STATE;
+}
+
 // ---------------------- АЦП ---------------------- //
 // determines the ADC channel number by the board pin number
 uint32_t analogInputToChannelNumber(uint32_t PinNumber)