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Increase ADC sample resolution to 13 bit #17

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Jul 29, 2021
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Increase ADC sample resolution to 13 bit #17

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3 changes: 2 additions & 1 deletion src/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1019,7 +1019,8 @@ void adc_config(void)
adc_data_alignment_config(ADC0, ADC_DATAALIGN_RIGHT);
adc_channel_length_config(ADC0, ADC_REGULAR_CHANNEL, 4);

adc_oversample_mode_config(ADC0, ADC_OVERSAMPLING_ALL_CONVERT, ADC_OVERSAMPLING_SHIFT_4B, ADC_OVERSAMPLING_RATIO_MUL16);
// Shift 3B gives a 13bit result with enough range on the FrSky hall sensors to give full 4096 steps for 12bit OTA
adc_oversample_mode_config(ADC0, ADC_OVERSAMPLING_ALL_CONVERT, ADC_OVERSAMPLING_SHIFT_3B, ADC_OVERSAMPLING_RATIO_MUL16);
adc_oversample_mode_enable(ADC0);

// sampletime 28 -> 333333 sps good for 8x oversampling, 10k rate
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