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Merge pull request #6426 from PaintYourDragon/main 

Analog in scaling fix for #4794
This commit is contained in:
Scott Shawcroft 2022-05-24 10:49:19 -07:00 committed by GitHub
parent 500083e887 92fa02effa
commit 3694b5c1e7
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 12 additions and 10 deletions
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4
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) {

6
ports/mimxrt10xx/common-hal/analogio/AnalogIn.c
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@ -81,8 +81,10 @@ uint16_t common_hal_analogio_analogin_get_value(analogio_analogin_obj_t *self) {
}
// Shift the value to be 16 bit
return ADC_GetChannelConversionValue(self->pin->adc, ADC_CHANNEL_GROUP) << 4;
uint16_t value = ADC_GetChannelConversionValue(self->pin->adc, ADC_CHANNEL_GROUP);
// 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) {

4
ports/nrf/common-hal/analogio/AnalogIn.c
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@ -125,8 +125,8 @@ uint16_t common_hal_analogio_analogin_get_value(analogio_analogin_obj_t *self) {
value = 0;
}
// Map value to from 14 to 16 bits
return value << 2;
// Stretch 14-bit ADC reading to 16-bit range
return (value << 2) | (value >> 12);
}
float common_hal_analogio_analogin_get_reference_voltage(analogio_analogin_obj_t *self) {

4
ports/raspberrypi/common-hal/analogio/AnalogIn.c
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@ -65,8 +65,8 @@ uint16_t common_hal_analogio_analogin_get_value(analogio_analogin_obj_t *self) {
adc_select_input(self->pin->number - ADC_FIRST_PIN_NUMBER);
uint16_t value = adc_read();
// Map value to from 12 to 16 bits
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) {

4
ports/stm/common-hal/analogio/AnalogIn.c
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@ -204,8 +204,8 @@ uint16_t common_hal_analogio_analogin_get_value(analogio_analogin_obj_t *self) {
uint16_t value = (uint16_t)HAL_ADC_GetValue(&AdcHandle);
HAL_ADC_Stop(&AdcHandle);
// // 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) {