Update src/AdvancedADC.cpp

Co-authored-by: Ibrahim Abdelkader <[email protected]>

Author: leonardocavagnis

src/AdvancedADC.cpp

@@ -139,9 +139,12 @@ int AdvancedADC::begin(uint32_t resolution, uint32_t sample_rate, size_t n_sampl
         // Find the first free ADC according to the available ADCs on pin.
         for (size_t j=0; instance == ADC_NP && j<AN_ARRAY_SIZE(adc_descr_all); j++) {
             descr = &adc_descr_all[j];
-            if (descr->pool == nullptr && ((ADC_TypeDef*)pinmap_peripheral(pin, PinMap_ADC) == descr->adc.Instance)) {
-                instance = (ADCName) pinmap_peripheral(pin, PinMap_ADC);  
-                adc_pins[0] = pin;
+            if (descr->pool == nullptr) {
+                ADCName tmp_instance = pinmap_peripheral(pin, PinMap_ADC);
+                if (descr->adc.Instance == ((ADC_TypeDef*) tmp_instance)) {
+                    instance = tmp_instance;
+                    adc_pins[0] = pin;
+                }
             }
         }
     }