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87 lines
2.6 KiB
C
87 lines
2.6 KiB
C
/*
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* SPDX-FileCopyrightText: 2020-2021 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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// The HAL layer for ADC (ESP32-C3 specific part)
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#include <string.h>
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#include "soc/soc_caps.h"
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#include "hal/adc_hal.h"
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#include "hal/adc_types.h"
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#include "soc/soc.h"
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//Currently we don't have context for the ADC HAL. So HAL variables are temporarily put here. But
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//please don't follow this code. Create a context for your own HAL!
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static bool s_filter_enabled[SOC_ADC_DIGI_FILTER_NUM] = {};
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static adc_digi_filter_t s_filter[SOC_ADC_DIGI_FILTER_NUM] = {};
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static bool s_monitor_enabled[SOC_ADC_DIGI_MONITOR_NUM] = {};
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static adc_digi_monitor_t s_monitor_config[SOC_ADC_DIGI_MONITOR_NUM] = {};
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/*---------------------------------------------------------------
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Digital controller setting
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---------------------------------------------------------------*/
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static void filter_update(adc_digi_filter_idx_t idx)
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{
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//ESP32-C3 has no enable bit, the filter will be enabled when the filter channel is configured
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if (s_filter_enabled[idx]) {
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adc_ll_digi_filter_set_factor(idx, &s_filter[idx]);
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} else {
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adc_ll_digi_filter_disable(idx);
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}
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}
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/**
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* Set adc digital controller filter factor.
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*
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* @param idx ADC filter unit.
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* @param filter Filter config. Expression: filter_data = (k-1)/k * last_data + new_data / k. Set values: (2, 4, 8, 16, 64).
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*/
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void adc_hal_digi_filter_set_factor(adc_digi_filter_idx_t idx, adc_digi_filter_t *filter)
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{
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s_filter[idx] = *filter;
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filter_update(idx);
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}
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/**
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* Get adc digital controller filter factor.
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*
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* @param adc_n ADC unit.
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* @param factor Expression: filter_data = (k-1)/k * last_data + new_data / k. Set values: (2, 4, 8, 16, 64).
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*/
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void adc_hal_digi_filter_get_factor(adc_digi_filter_idx_t idx, adc_digi_filter_t *filter)
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{
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*filter = s_filter[idx];
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}
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void adc_hal_digi_filter_enable(adc_digi_filter_idx_t filter_idx, bool enable)
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{
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s_filter_enabled[filter_idx] = enable;
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filter_update(filter_idx);
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}
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static void update_monitor(adc_digi_monitor_idx_t idx)
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{
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//ESP32-C3 has no enable bit, the monitor will be enabled when the monitor channel is configured
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if (s_monitor_enabled[idx]) {
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adc_ll_digi_monitor_set_mode(idx, &s_monitor_config[idx]);
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} else {
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adc_ll_digi_monitor_disable(idx);
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}
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}
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void adc_hal_digi_monitor_config(adc_digi_monitor_idx_t idx, adc_digi_monitor_t *config)
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{
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s_monitor_config[idx] = *config;
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update_monitor(idx);
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}
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void adc_hal_digi_monitor_enable(adc_digi_monitor_idx_t mon_idx, bool enable)
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{
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s_monitor_enabled[mon_idx] = enable;
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update_monitor(mon_idx);
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}
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