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78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// The HAL layer for ADC (common part)
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#include "hal/adc_hal.h"
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#include "hal/adc_hal_conf.h"
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#include "hal/adc_types.h"
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void adc_hal_digi_deinit(void)
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{
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adc_ll_digi_clear_pattern_table(ADC_NUM_1);
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adc_ll_digi_clear_pattern_table(ADC_NUM_2);
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}
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void adc_hal_digi_controller_config(const adc_digi_config_t *cfg)
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{
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/* Single channel mode or multi channel mode. */
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adc_ll_digi_set_convert_mode(cfg->conv_mode);
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if (cfg->conv_mode & ADC_CONV_SINGLE_UNIT_1) {
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adc_ll_set_controller(ADC_NUM_1, ADC_CTRL_DIG);
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if (cfg->adc1_pattern_len) {
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adc_ll_digi_clear_pattern_table(ADC_NUM_1);
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adc_ll_digi_set_pattern_table_len(ADC_NUM_1, cfg->adc1_pattern_len);
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for (uint32_t i = 0; i < cfg->adc1_pattern_len; i++) {
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adc_ll_digi_set_pattern_table(ADC_NUM_1, i, cfg->adc1_pattern[i]);
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}
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}
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}
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if (cfg->conv_mode & ADC_CONV_SINGLE_UNIT_2) {
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adc_ll_set_controller(ADC_NUM_2, ADC_CTRL_DIG);
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if (cfg->adc2_pattern_len) {
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adc_ll_digi_clear_pattern_table(ADC_NUM_2);
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adc_ll_digi_set_pattern_table_len(ADC_NUM_2, cfg->adc2_pattern_len);
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for (uint32_t i = 0; i < cfg->adc2_pattern_len; i++) {
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adc_ll_digi_set_pattern_table(ADC_NUM_2, i, cfg->adc2_pattern[i]);
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}
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}
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}
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adc_ll_digi_set_output_format(cfg->format);
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if (cfg->conv_limit_en) {
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adc_ll_digi_set_convert_limit_num(cfg->conv_limit_num);
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adc_ll_digi_convert_limit_enable();
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} else {
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adc_ll_digi_convert_limit_disable();
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}
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adc_ll_digi_set_data_source(ADC_I2S_DATA_SRC_ADC);
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}
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int adc_hal_hall_convert(void)
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{
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int Sens_Vp0;
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int Sens_Vn0;
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int Sens_Vp1;
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int Sens_Vn1;
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int hall_value;
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// convert for 4 times with different phase and outputs
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adc_ll_hall_phase_disable(); // hall phase
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adc_hal_convert( ADC_NUM_1, ADC_CHANNEL_0, &Sens_Vp0 );
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adc_hal_convert( ADC_NUM_1, ADC_CHANNEL_3, &Sens_Vn0 );
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adc_ll_hall_phase_enable();
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adc_hal_convert( ADC_NUM_1, ADC_CHANNEL_0, &Sens_Vp1 );
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adc_hal_convert( ADC_NUM_1, ADC_CHANNEL_3, &Sens_Vn1 );
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hall_value = (Sens_Vp1 - Sens_Vp0) - (Sens_Vn1 - Sens_Vn0);
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return hall_value;
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}
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