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Correctly scale analog reading per issue #4794

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Paint Your Dragon 2022-05-24 08:40:51 -07:00 committed by GitHub
parent 500083e887
commit eefba16644
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1 changed files with 2 additions and 2 deletions
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ports/atmel-samd/common-hal/analogio/AnalogIn.c
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@ -123,8 +123,8 @@ uint16_t common_hal_analogio_analogin_get_value(analogio_analogin_obj_t *self) {
adc_sync_read_channel(&adc, self->channel, ((uint8_t *)&value), 2);
adc_sync_deinit(&adc);
// Shift the value to be 16 bit.
return value << 4;
// Stretch 12-bit ADC reading to 16-bit range
return (value << 4) | (value >> 8);
}
float common_hal_analogio_analogin_get_reference_voltage(analogio_analogin_obj_t *self) {