disable pad keeper when using ADC pin; otherwise you'll see a 20k input
impedance.
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@ -76,6 +76,7 @@ void adc_service(void) {
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ADC->SEQ_1bits.CH##x = 1; \
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GPIO->FUNC_SEL.ADC##x = 1; \
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GPIO->PAD_DIR.ADC##x = 0; \
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GPIO->PAD_KEEP.ADC##x = 0; \
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GPIO->PAD_PU_EN.ADC##x = 0; \
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}} while (0)
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