Update src/AdvancedADC.cpp

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

Author: leonardocavagnis

src/AdvancedADC.cpp

@@ -124,11 +124,8 @@ int AdvancedADC::begin(uint32_t resolution, uint32_t sample_rate, size_t n_sampl
 
     // Clear ALTx pin.
     for (size_t i=0; i<n_channels; i++) {
-        for (size_t j=0; j<AN_ARRAY_SIZE(pin_alt); j++) {
-            adc_pins[i] = (PinName) (adc_pins[i] & ~(uint32_t)pin_alt[j]);
-        }  
+        adc_pins[i] =  (PinName) (adc_pins[i] & ~(ADC_PIN_ALT_MASK));
     }
-    
     // Find an ADC that can be used with these set of pins/channels.
     for (size_t i=0; instance == ADC_NP && i<AN_ARRAY_SIZE(pin_alt); i++) {
         // Calculate alternate function pin.