The differential channels need to start as false and go true once configured.

Author: nseidle

cores/arduino/ard_sup/analog/ap3_analog_structures.c

@@ -50,8 +50,8 @@ ap3_analog_configure_map_elem_t ap3_analog_configure_map[AP3_ANALOG_CHANNELS] =
     {.pad = 33, .isAnalog = false},
     {.pad = 34, .isAnalog = false},
     {.pad = 35, .isAnalog = false},
-    {.pad = AP3_ADC_DIFF0_PAD, .isAnalog = true},
-    {.pad = AP3_ADC_DIFF1_PAD, .isAnalog = true},
+    {.pad = AP3_ADC_DIFF0_PAD, .isAnalog = false},
+    {.pad = AP3_ADC_DIFF1_PAD, .isAnalog = false},
     {.pad = AP3_ADC_TEMP_PAD, .isAnalog = true},
     {.pad = AP3_ADC_DIV3_PAD, .isAnalog = true},
     {.pad = AP3_ADC_VSS_PAD, .isAnalog = true},