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feat(adc): support ADC calibration on ESP32C61

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gaoxu
2025-07-10 17:49:05 +08:00
committed by Gao Xu
parent 2e619615de
commit 1e76669a8b
10 changed files with 294 additions and 95 deletions
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41
components/hal/esp32c61/include/hal/adc_ll.h
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@@ -641,6 +641,47 @@ static inline void adc_ll_set_controller(adc_unit_t adc_n, adc_ll_controller_t c
/*---------------------------------------------------------------
Calibration
---------------------------------------------------------------*/
/* ADC calibration code. */
/**
* @brief Set common calibration configuration. Should be shared with other parts (PWDET).
*/
__attribute__((always_inline))
static inline void adc_ll_calibration_init(adc_unit_t adc_n)
{
(void)adc_n;
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR1_DREF_ADDR, 1);
}
/**
* Configure the registers for ADC calibration. You need to call the ``adc_ll_calibration_finish`` interface to resume after calibration.
*
* @note Different ADC units and different attenuation options use different calibration data (initial data).
*
* @param adc_n ADC index number.
* @param internal_gnd true: Disconnect from the IO port and use the internal GND as the calibration voltage.
* false: Use IO external voltage as calibration voltage.
*/
static inline void adc_ll_calibration_prepare(adc_unit_t adc_n, bool internal_gnd)
{
/* Enable/disable internal connect GND (for calibration). */
if (internal_gnd) {
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR1_ENCAL_GND_ADDR, 1);
} else {
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR1_ENCAL_GND_ADDR, 0);
}
}
/**
* Resume register status after calibration.
*
* @param adc_n ADC index number.
*/
static inline void adc_ll_calibration_finish(adc_unit_t adc_n)
{
REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR1_ENCAL_GND_ADDR, 0);
}
/**
* Set the calibration result to ADC.
*