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esp_adc: added adc digital filter feature

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Armando
2023-02-07 16:01:26 +08:00
committed by Armando (Dou Yiwen)
parent 648b1a41c6
commit 3afa671069
38 changed files with 1032 additions and 402 deletions
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77
components/hal/esp32c2/include/hal/adc_ll.h
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@@ -161,46 +161,77 @@ static inline void adc_ll_digi_controller_clk_disable(void)
/**
* Reset adc digital controller filter.
*
* @param idx Filter index
* @param adc_n ADC unit.
*/
static inline void adc_ll_digi_filter_reset(adc_unit_t adc_n)
static inline void adc_ll_digi_filter_reset(adc_digi_iir_filter_t idx, adc_unit_t adc_n)
{
(void)adc_n;
APB_SARADC.saradc_filter_ctrl0.saradc_filter_reset = 1;
APB_SARADC.saradc_filter_ctrl0.saradc_filter_reset = 0;
}
/**
* Set adc digital controller filter factor.
* Set adc digital controller filter coeff.
*
* @note If the channel info is not supported, the filter function will not be enabled.
* @param idx ADC filter unit.
* @param filter Filter config. Expression: filter_data = (k-1)/k * last_data + new_data / k. Set values: (2, 4, 8, 16, 64).
* @param idx filter index
* @param adc_n adc unit
* @param channel adc channel
* @param coeff filter coeff
*/
static inline void adc_ll_digi_filter_set_factor(adc_digi_filter_idx_t idx, adc_digi_filter_t *filter)
static inline void adc_ll_digi_filter_set_factor(adc_digi_iir_filter_t idx, adc_unit_t adc_n, adc_channel_t channel, adc_digi_iir_filter_coeff_t coeff)
{
abort();
uint32_t factor_reg_val = 0;
switch (coeff) {
case ADC_DIGI_IIR_FILTER_COEFF_2:
factor_reg_val = 1;
break;
case ADC_DIGI_IIR_FILTER_COEFF_4:
factor_reg_val = 2;
break;
case ADC_DIGI_IIR_FILTER_COEFF_8:
factor_reg_val = 3;
break;
case ADC_DIGI_IIR_FILTER_COEFF_16:
factor_reg_val = 4;
break;
case ADC_DIGI_IIR_FILTER_COEFF_64:
factor_reg_val = 6;
break;
default:
HAL_ASSERT(false);
}
if (idx == ADC_DIGI_IIR_FILTER_0) {
APB_SARADC.saradc_filter_ctrl0.saradc_filter_channel0 = ((adc_n + 1) << 3) | (channel & 0x7);
APB_SARADC.saradc_filter_ctrl1.saradc_filter_factor0 = factor_reg_val;
} else if (idx == ADC_DIGI_IIR_FILTER_1) {
APB_SARADC.saradc_filter_ctrl0.saradc_filter_channel1 = ((adc_n + 1) << 3) | (channel & 0x7);
APB_SARADC.saradc_filter_ctrl1.saradc_filter_factor1 = factor_reg_val;
}
}
/**
* Get adc digital controller filter factor.
*
* @param adc_n ADC unit.
* @param factor Expression: filter_data = (k-1)/k * last_data + new_data / k. Set values: (2, 4, 8, 16, 64).
*/
static inline void adc_ll_digi_filter_get_factor(adc_digi_filter_idx_t idx, adc_digi_filter_t *filter)
{
abort();
}
/**
* Disable adc digital controller filter.
* Enable adc digital controller filter.
* Filtering the ADC data to obtain smooth data at higher sampling rates.
*
* @note If the channel info is not supported, the filter function will not be enabled.
* @param adc_n ADC unit.
* @param idx filter index
* @param adc_n ADC unit
* @param enable Enable / Disable
*/
static inline void adc_ll_digi_filter_disable(adc_digi_filter_idx_t idx)
static inline void adc_ll_digi_filter_enable(adc_digi_iir_filter_t idx, adc_unit_t adc_n, bool enable)
{
abort();
(void)adc_n;
if (!enable) {
if (idx == ADC_DIGI_IIR_FILTER_0) {
APB_SARADC.saradc_filter_ctrl0.saradc_filter_channel0 = 0xF;
APB_SARADC.saradc_filter_ctrl1.saradc_filter_factor0 = 0;
} else if (idx == ADC_DIGI_IIR_FILTER_1) {
APB_SARADC.saradc_filter_ctrl0.saradc_filter_channel1 = 0xF;
APB_SARADC.saradc_filter_ctrl1.saradc_filter_factor1 = 0;
}
}
//nothing to do to enable, after adc_ll_digi_filter_set_factor, it's enabled.
}
/**