инициализацию переключателя между А4 и А5 вынесла в желлезозависимые функции. У платы старт добавила заглушку

cores/arduino/wiring_analog.c

@@ -42,18 +42,8 @@ uint32_t analogRead(uint32_t PinNumber)
   uint32_t adcChannel = analogInputToChannelNumber(PinNumber);
   if (adcChannel != NC) 
   {
-    // if we use pin A5, we need to set SELA45 (1.15) to 1 to switch the output from A4 to A5
-    if (PinNumber == A5)   
-    {
-      HAL_GPIO_PinConfig(GPIO_1, GPIO_PIN_15, HAL_GPIO_MODE_GPIO_OUTPUT, HAL_GPIO_PULL_NONE, HAL_GPIO_DS_2MA);
-      HAL_GPIO_WritePin(GPIO_1, GPIO_PIN_15, GPIO_PIN_HIGH);
-    }
-    else if(PinNumber == A4)
-    {
-      // return the switch to A4 in case A5 was previously read
-      HAL_GPIO_PinConfig(GPIO_1, GPIO_PIN_15, HAL_GPIO_MODE_GPIO_OUTPUT, HAL_GPIO_PULL_NONE, HAL_GPIO_DS_2MA);
-      HAL_GPIO_WritePin(GPIO_1, GPIO_PIN_15, GPIO_PIN_LOW);
-    }
+    additionalPinsInit(PinNumber);
+
     // init channel 
     hadc.Init.Sel = adcChannel;
     HAL_ADC_Init(&hadc);

cores/arduino/wiring_digital.c

@@ -74,24 +74,7 @@ void pinMode(uint32_t PinNumber, uint32_t PinMode)
 
     // init pin
     HAL_GPIO_Init(GPIO_addr, &GPIO_InitStruct);
-
-    // if we use pin A5, we need to set SELA45 (1.15) to 1 to switch the output from A4 to A5
-    if (PinNumber == A5)   
-    {
-      GPIO_InitStruct.Pin = GPIO_PIN_15;
-      GPIO_InitStruct.Mode = HAL_GPIO_MODE_GPIO_OUTPUT;
-      GPIO_InitStruct.Pull = HAL_GPIO_PULL_NONE;
-      HAL_GPIO_Init(GPIO_1, &GPIO_InitStruct);
-      HAL_GPIO_WritePin(GPIO_1, GPIO_PIN_15, GPIO_PIN_HIGH);
-    }
-    else if(PinNumber == A4)
-    {
-      GPIO_InitStruct.Pin = GPIO_PIN_15;
-      GPIO_InitStruct.Mode = HAL_GPIO_MODE_GPIO_OUTPUT;
-      GPIO_InitStruct.Pull = HAL_GPIO_PULL_NONE;
-      HAL_GPIO_Init(GPIO_1, &GPIO_InitStruct);
-      HAL_GPIO_WritePin(GPIO_1, GPIO_PIN_15, GPIO_PIN_LOW);
-    }
+    additionalPinsInit(PinNumber);
   }
 }
 

variants/elbear_ace_uno/pins_arduino.h

@@ -65,6 +65,8 @@ uint16_t pinCommonQty(void);
 volatile uint32_t* portOutputRegister(GPIO_TypeDef* GPIO_x);
 // the function returns a reference to the STATE address of the GPIO register
 volatile uint32_t* portInputRegister(GPIO_TypeDef* GPIO_x);
+// the function initializes additional MCU pins depending on the specified pin number
+void additionalPinsInit(uint32_t PinNumber);
 
 // UART
 // available uarts quantity

variants/elbear_ace_uno/variant.c

@@ -100,6 +100,23 @@ volatile uint32_t* portInputRegister(GPIO_TypeDef* GPIO_x)
   return &GPIO_x->STATE;
 }
 
+// the function initializes additional MCU pins depending on the specified pin number
+void additionalPinsInit(uint32_t PinNumber)
+{
+  // if we use pin A5, we need to set SELA45 (1.15) to 1 to switch the output from A4 to A5
+  if (PinNumber == A5)   
+  {
+    HAL_GPIO_PinConfig(GPIO_1, GPIO_PIN_15, HAL_GPIO_MODE_GPIO_OUTPUT, HAL_GPIO_PULL_NONE, HAL_GPIO_DS_2MA);
+    HAL_GPIO_WritePin(GPIO_1, GPIO_PIN_15, GPIO_PIN_HIGH);
+  }
+  else if(PinNumber == A4)
+  {
+    // return the switch to A4 in case A5 was previously read
+    HAL_GPIO_PinConfig(GPIO_1, GPIO_PIN_15, HAL_GPIO_MODE_GPIO_OUTPUT, HAL_GPIO_PULL_NONE, HAL_GPIO_DS_2MA);
+    HAL_GPIO_WritePin(GPIO_1, GPIO_PIN_15, GPIO_PIN_LOW);
+  }
+}
+
 // ---------------------- ADC ---------------------- //
 // determines the ADC channel number by the board pin number
 uint32_t analogInputToChannelNumber(uint32_t PinNumber)

variants/start/pins_arduino.h

@@ -112,6 +112,8 @@ uint16_t pinCommonQty(void);
 volatile uint32_t* portOutputRegister(GPIO_TypeDef* GPIO_x);
 // the function returns a reference to the STATE address of the GPIO register
 volatile uint32_t* portInputRegister(GPIO_TypeDef* GPIO_x);
+// the function is needed for compatibility with other boards
+static inline void additionalPinsInit(uint32_t PinNumber) {}
 
 // UART
 // available uarts quantity